REPORT ENVIRONMENTAL IMPACT ASSESSMENT (Final version) VIETNAM URBAN UPGRADlNG PROJECT YAM DlNH URBAN IJPCRADING SUB-PROJECT I 1 YCiKADING PRIMARY AND SECONDARY INFKASTKUCTI!KE, PHASE 2 THANG LONG INFRASTRUCTURE DEVELOPMENT COMPANY (Infra- Thanglong) Address: Suit 100 1, Building 1 0 1, Lang Ha, Dong Da, Ha Noi Tel: +84 - (0)4 - 3 562 47 0913 562 47 10 Fax: +84 - (0)4 - 3 562 47 1 1 Email: [email protected]; Infra-TL(iilhn.vnn.vn April 2009 E817 v13 Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized
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REPORT ENVIRONMENTAL IMPACT ASSESSMENT
(Final version)
VIETNAM URBAN UPGRADlNG PROJECT Y A M DlNH URBAN IJPCRADING SUB-PROJECT I1 YCiKADING PRIMARY AND SECONDARY
INFKASTKUCTI!KE, PHASE 2
THANG LONG INFRASTRUCTURE DEVELOPMENT COMPANY (Infra- Thanglong) Address: Suit 100 1, Building 1 0 1, Lang Ha, Dong Da, Ha Noi Tel: +84 - (0)4 - 3 562 47 0913 562 47 10 Fax: +84 - (0)4 - 3 562 47 1 1 Email: [email protected]; Infra-TL(iilhn.vnn.vn
April 2009
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NAM IlINltl PEOI'1,E'S COMM1IvI'I'E: N A M II[N1[ [NV1:S'I'Ml:N'I7 & (IONS'I'RII(."I'lON MANA(;I:MI :N'l' IIN1'1'
REPORT ENVIRONMENTAL IMPACT ASSESSMENT
(Final version)
VTErTNAM UItBAN UPGIXADING PIXOJECrT NAM DINH UKBAN L7I'GRADING SUB-PROJECT
UP<>I<ADING I'ItIMARY AND SECONIIAIZY IN FRASTKUCTURE, PHASE 2
Representative of Client Representative of Consultant
NAM DINH INVESTMENT & TI-IANG LONG INFRASTRIJCTURE CONS~l'lilJCI'ION MANAGEMENT IJNll&;_ -
pHd, T 6 ~ ~ G I A M ~36'~
April 2009
VIETNAM LIRBAN UPGRADING PRO.IEC1' - NAh4 DIN1 i L'RDAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
ABBREVIATIONS BOD - Biochemical oxygen demand
CMC - Construction Monitoring Consultant
COD - Chemical oxygen demand
DO
DONRE
EIA
EMP
LI A
MONRE
PC
PMU
RAP
TSS
VUUP
WB
WHO
- Dissolved oxygen
- Department of Natural Resource and Environment
- Environmental Impact Assessment
- Environmental Management Plan
- Low Income Area
- Ministry of Natural Resource and Environment
- People's Committee
- Project Management Unit
- Resettlement Action Plan
- Total Suspended Solid Waste
- Vietnam Urban Upgrading Project
- Worldbank
- World Health Organization
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VIETNAM URBAN UPGRADING PROJECT . NAM 31i.lll URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
TABLE OF CONTENTS
EXECUTIVE SUMMARY
CHAPTER 1 PROJECT DESCRIPTION
................................................................... 1.1. BACKGROUND OF THE PROJECT 23
........................................................................ 1.2. 0B.IECTIVES OF THE PROJECT 24
............................ 1.3. PROJECT LOCATION AND BASELINE DATA OF THE CITY 25
.......................................................................... 1.3.1. GEOGRAPHICAL POSITION 25
3.2. WORKS IN BASlN NO.l - DlEN BlEN - DANGVIET CHAU - KENH PHUC TRONG ....................................................................................................................... 60
. .......................... 3.3. WORKS IN BASIN N0.2. HANG THAO MA DlEN CHANNEL 60
................... 3.4. WORKS IN BASIN N0.3. HUNG VUONG - NGUYEN DUC THUAN 61
3.5. WORKS IN BASlN N0.4: NGUYEN TRAl - MAC THI BUOl - MUONG AN PHONG .......................................................... .............................................................. 61
. 3.6. WORKS IN BASIN NO 6: NGUYEN CO THACH ................................................ 62
. 3.7. WORKS IN BASIN N0.7. NGUYEN TRAl ROAD ................................................ 62
. 3.8. WORKS IN BASIN NO 9: ROAD TOWARD MY XA ........................................... 62
. 3.9. WORKS IN BASIN NO 10 : LIEN HA ................................................................ 65
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3.10. EMBANKMENT OF REGULATED POND ......................................................... 65
3.11. EMBANKMENT OF BAO BOI LAKE ................................................................. 65
3.12. EMBANKMENT OF NANG 'I'INH LAKE ............................................................ 66
3.13. TRUYEN THONG LAKE .................................................................................... 67
3.14. SUMMARY OF INVESTED COMPONENTS ...................................................... 67
CHAPTER 4 ENVIRONMENTAL IMPACT ASSESSMENT
........................................... 4.1. IMPACTS DURING PRE-CONSTRUC'TION PHASE 69
........................................................ 4.2. IMPACT IN THE CONSTRUCTION PHASE 70
4.2.1. IMPACT OF PRIMARY AND SECONDARY MAIN DRAINAGE CONSTRUCTION ..................................................................................................... 70
4.2.2. IMPACT OF EMBANKMENT CONSTRUCTION, DREDGING, TRANSPORTING AND DISPOSAL OF SEDIMENT FROM CANAL AND LAKES .... 78
4.3. IMPACT ON THE OPERATION PHASE ............................................................... 84
4.3.1. GENERAL PARAMETERS ............................................................................. 85
........................................................................... 4.3.2. BASIS FOR CALCULATION 86
4.3.3. SELECTION CALCULATION PARAMETERS FOR OPERAI-ION MECHANISM ................................................................................................................................. -88
4.3.4. SUMMARY OF CALCULAl-ION RESULTS .................................................... 91
CHAPTER 5 REPLACEMENT OPTIONS OF PROJECT
................................................................ 5.1 WITHOUT THE PROJECT SITUATION 94
5.2 ALTERNATIVES FOR THE PROJECT ................................................................. 95
6.3.4. RESPONSIBILITY OF THE CONTRACTOR IN ENVIRONMENTAL MANAGEMENT ...................................................................................................... 120
.................................................. 6.4. CAPACITY DEVELOPMENT AND TRAINING 120
6.5. BUDGET REQUIREMENT FOR ENVIRONMENTAL MANAGEMENT. MITIGATION AND MONITORING ............................................................................ 122
CHAPTER 7 PUBLIC CONSULTATION
7.1. DEMANDING OF PllBLlC CONSULTATION .................................................... 125
................................................... 7.2. OBJECTIVES OF PUBLIC CONSULTATION 125
METHODOLOGY ............................................................................................... ........................................................ 7.4. OUTCOME OF PUBLIC CONSULTATION 126
7.4.1. CONSLILTATION OF PEOPLE'S COMMIT'TEES OF URBAN & SUB-URBAN WARDS .................................................................................................................. 127
7.4.2. CONSULTATION OF THE NATIONAL FRONTIER COMMITTEES OF URBAN & SUB-URBAN WARDS ......................................................................................... 127
.......... 7.4.3. CONSULTATION OF RESIDENTIAL COMMUNITIES IN THE AREA 127
7.4.4 GENERALIZATION OF CONSULTATING OPINIONS OF LOCAL AUTHORITY ............................ OFFICERS AND RESIDENTIAL COMMUNITIES IN THE AREA 127
......................................................................................... 7.5 PUBLIC DISLOSURE 128
CONCLUSIONS AND SUGGESTIONS
ANNEXES
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V[ETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
EXECUTIVE SUMMARY
Environmental Assessment Report (EA)
1. INTRODUCTION
1.1. Objectives of the Environmental Assessment (EA) Report
The objectives of this EA Report are to assess the potential environmental impacts of activities proposed in Phase 2 investment activities of Narn Dinh Sub-project under Urban Upgrading Project (PO70 197) and recommended needed mitigation and monitoring measures to address such impacts. FS prepared for the sub-project, the EA was prepared to meet the requirements of both the Government of Vietnam (GoV) and the World Bank as part of the project preparation process. Potential social impacts of the proposed Phase 2 activities are separately assessed and addressed in the Resettlement Plan that was prepared and submitted for the sub-project.
Safeguard Policies of the World Bank: In addition to procedures of environmental review and approval of the GoV, the Urban Upgrading Project shall be prepared and implemented in compliance with environmental and social safeguard policies of the World Bank. Based on these safeguard policies, the Urban Upgrading Project has been classified as a Category A type project due to the potential to cause significant environmental impact if proper assessment and mitigation measures are not applied. Specific Bank safeguard policies that were assessed during the draft EA study were:
Environmental Assessment - Operational Procedure / Bank Procedure 4.01
Cultural Resources (draft OP 4.1 1 - OPN 1 1.03)
Public Consultation: As a Category A type project, two (2) stages of public consultations will be carried out and documented in accordance with OP 4.01. A first stage of consultations was held in April 2008, include group discussions and household surveys at some households. A second stage of consultations was conducted from 7Ih May 2008 to 1 5 ' ~ May 2008. In addition, a questionnaire survey was carried out with Project Affected People (P.APs) near Phase 1 discharge outlets in April 2008.
Public Disclosure: The English version of EA report for phase 2 was supposed to be disclosed in Vietnam and at Infoshop (USA) on 30th April 2009.
The Vietnamese version of draft EA report was disclosed from 30th August 2008 at PMU, Nam Dinh DONRE. Decision No 1423 dated on 28/8/2008 signed by Nam Dinh DONRE on approval of the EIA report. A summary of environmental impacts of the project is expected to be disclosed at related wards on 30th April 2009. All documents were disclosed locally by the Provincial People's Committee (PPC), the provincial Department of Natural Resources and Environment (DONRE), the Project Preparation Units (PPUs), offices of the Wards in which people willhe affected, and were accessible to local NGOs and PAPS.
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH LIRBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
2. PROJECT OUTLINE
2.1. Project Name : Namdinh Urban Upgrading Project
2.2. Project Owner: Nam Dinh Provincial People's Committee
2.3. Project's Objectives
The objectives of the Phase 2 activities in Namdinh Subproject activities are as follows:
To serve low-income residential areas, minimize flooding situation and improve living standards by improving the environmental condition.
Upgrading and rehabilitating tertiary drainage in low-income residential areas and primary and secondary drainage supporting the tertiary infrastructure in a sustainable manner.
To contribute for the improvement of public health, reducing disease contaminations throughout upgrading drainage system and improving hygienic condition.
To give a chance for residents living in the upgraded areas expanding their exchanges, and provide opportunities for better business activities and jobs to improve their living standards
2.4. Description of Proposed Project Components - Construction works in Phase 2 of Project comprises:
Construction of primary and secondary drainage culvert alignments
Construction of embankment and dredging for ponds, channels, ditches and temporary roads.
Upgrade the drainage systems with culvert alignments in 10 sub-basin with the total length of 1575m; upgrade Phu Trong canal: dredging 10,080 m3 sediment and embankment of 900 m; upgrade Bao Boi lake: dredging 14,670 m3 sediment, upgrade 773m access road and upgrade 115 m drainage to the lake ; upgrade Nang Tinh lake: dredging 45,000 m3 sediment and embankment 1 64m.
3. SUMMARY OF EXISTING ENVIRONMENTAL AND SOCIO-ECONOMIC CONDITIONS
3.1 Socio-economic condition
Industry: Narrl Dinh city is an industrial and commercial center of the region. There are nearly 100 factories, and 180 Limited and Joint Stock companies being located in the city, in which 7 are state companies, 165 are private companies, and 191 9 production establishments. Industrial production value reaches 1,228 billion VND/year, accounting for over 63.9% of the entire province's GDP.
Agricultural: concentrates in suburban wards in which food planting accounts a large area. Besides, farmers also focus on handicraft production and breeding. A proportion of agricultural production over total GDP of the city in 2000 was 4.2% (52.1 billion VND over
- 1225.3 billion VND).
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Commerce - Services: The City has diversified and abundant commercial networks, including 13 big companies with comprehensive businesses, four big hotels, one centre market (Rong market) with scale of 1,491 stalls, 83 kiosks with a crowned system of markets in residential areas. The City has two big trading centers and many business points located on streets and residential areas. In addition, tourism and service advantages of the city are also developed.
Population - Population density: According to the statistical yearbook of Narn Dinh province 2006, total population of Nam Dinh city is 245,550 (in which: 81.6% living in the inner city and 18.4% living in sub-urban areas), among them male accounts for 48.4%, female for 51.6%/ Average population density is 53.01 persons/ha and the rate of natural population increase is 0.79% per year.
Average income per person is about 950,000 VND
Health care: There are 35 health care bases, including one biggest general hospital at provincial level, one metropolitan medical center with functions of residential health and treating epidemic diseases, 4 local testing rooms and 25 medical bases in communes and wards with the total of 1,320 sick-beds. There are some well-known hospitals such as E hospital, I hospital, metropolitan hospital, and Central hospital.
According to the survey of 1 10 households along improved alignments carried out by Coffey Consultant done October, 2007, the main health problems in for the residents are :respiratory and optic diseases.
I 3.2. Socio-economic description of the project area
The data of social economic condition of the affected households is a result of resettlement survey and consultation with each PAH. Social economic condition of 99 households and 378 individuals were investigated and in process of statistics completely and in detail. The obtained information plays an important role in making resettlement plan of the project.
Demography description
* Population
100% of PAP is Kinh people; there is no other ethnic one. Male population is lower than female population, male: population total is 1821378 (comprises 48.2%), female: population total is 1961378 (comprises 51.8%). A high portion of population is under the working age, children under 6 years only comprise 7.7% population in the.area.
* Education level
Population graduated from Primary/Secondary/High school is very high about 83.9%. There is 8% of population graduated and post - graduated population. It shows that education level in the area is rather lo,w compared to general level of the whole Narn Dinh.
* Occupation
Occupation structure of the population in the project site is quite diversified. Free labours comprise the highest ratio (34.92%j, and pupils, students (22.22%), small businesses
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VlETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
comprise 11.38%. However, population with montl~ly stable incomes Occupation such as officials, polices, soldiers ... only comprise 2-3%. Then, it is in fact that ratio of monthly unstable incomes population is quite high, this affects economic living of the households.
* Average incomes
It is clear that the above career structure will affect monthly incomes of the households a lot. Average incomes of 99 PAH in the project site is 2,826,276 Vietnamese dong per month (equal to incomes of one person is 726,210 Vietnamese dong). This level is higher than average incomes of non-business households (2,540,278 Vietnamese dong per month), but lower than average incomes of business households (3,177,275 Vietnamese dong per month). However, the incomes difference of the above households is not much, only about 300,000- 400,000 Vietnamese dong per month. Hence, it is shown that living standard of people in the project site is quite similar.
Stable incomes are mainly from salary, pension and unstable incomes are from business activities, motorbike taxi services, hired labour.. .
* Expenses of the households
With difference between 2 business and non-business groups, expenses structure of these 2 groups is different. For non-business households, cost for meals, activities comprises largely (54.5% and 22.3%), other cost only comprises 23.4%. Netherless, far business households, cost for meals (49%), activities (14.3%), an amount (comprise 23.3%) is used for reinvestment of their business activities.
Besides, if earning and spending total for both 2 groups are compared, most of the households have no saving monthly. All of the incomes are spent in month.
* Living facilities
Facilities for living and business of the households were also investigated and evaluated. The result shows that basic living facilities are seen in most of the households such as motorbike (69%), telephone (75%), fridge (55%), television (97%), cable television (55%), washing machine (38%).
However, there is low portion of the households having high standard facilities such as cars, internet. It shows that living standard of the population in the project site is still rather low.
3.3. Water quality
According to the survey conducted by Thang Long Infrastructure Development Joint Stock Company coordinated with Coffey Company and Quality Measurement Bureau -. Nam Dinh Department of Science and Technology (see in Figure 1.6 ) as well as based on the data collected, of the environmental conditions within project areas are presented as follows:
Surface water: Dao river is a big one, which supplies freshwater for Nam Dinh city. Being sourced from the Red river by the south of Tan De bridge, runs about 34 km through Narn Dinh city, and joint with the Day river in Hoang Nam suburban ward, Nghia Hung district, the
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river supplies about 50,000 m3lday for city habitants and industrial production, in which 25,000 m3 used for living purpose and the remain for industrial production.
Underground water: According to the recently studies, Nam Dinh city is able to exploit and use the underground water in 2 layers comprising: the Holocene which is of 25 meters depth, and Pleistocene layer, which belongs to Hanoi formation and contains 2 aquifers with good quality.
Drainage system: Drainage system is used for storm water, domestic and production and services wastewater. The system comprises underground culvert alignments along the streets and opened ditched or lakeslponds in some sections, this system is seriously degraded. The total length of culvert alignments is about 24,883km long with diameter of 400 +- 1400mm wide. With support from the Government of Switzerland during 1997-200 1 ,the drainage system of the southwest city area improved through the construction of Kenh Gia pumping station, upgrading of a main ditch of Kenh Gia channel and improved drainage pipes in the city. Although these constructions are in operation, flooding situation has not improved significantly.
There is no separate collection and treatment system for production and domestic wastewater. The entire waste water is directly discharged into drainage ditches. Thus, it is necessary to prepare a general plan for waste water collection and treatment system in the coming time.
The surface water of some ponds is polluted by organic substances and microorganism. Therefore, it is necessary to take the measures to minimize the sources which may causewater pollution.
3.4. Air quality
According to the survey conducted by Nam Dinh Department of Natural Resources and Environment in 2006, some parameters such as TSP are shown to be higher than standards TCVN 5937:2005 Suspended dust is quite high in rush-hour or at main traffic points such as Truong Chinh T-junction, Nang Tinh cross-sections and Nam Dinh bus station gate. CO level reaches highest in the dense population areas such as Truong Chinh -junction (3.99mg/m3), reduces at Nang Tinh cross-road (3.95mg/m3), and reaches the lowest at the main culvert of Nam Dinh Textile Company (2.17 mg/m3). Noise level increased slightly over the years. Among measured locations, only Nam Dinh bus station gate exceeds standard due to quite large traffic volume. .Updated environmental data from survey conducted by Infra-Thanglong has shown similar results as with DONRE'S survey.
3.5 Solid waste management
According to the statistic data, the city's garbage quantity is estimated about 200ton/day, in which Urban Environmental Company (URENCO) collected about 70% (145tfday). Annual collection and transport capacity may reach 53,000T of garbage1 year. Collected solid waste is gathered at a few locations on the road for garbage trucks to transport to landfill site of 3ha square area with 8x20 dumping sections in Loc Hoa Communes.
This landfill site was put into use in 1994 and has 8 dumping sections. Those sections have - been filled up so far. Since August 2002, more 20 dumping section have been newly built in
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Man field (Loc Hoa commune). Besides that, the factory produces bio- fertilizer fiom organic . solid water with the capacity of 250 todday which is being operated by preferential loan from
the French Government.
4. ASSESSMENT OF PREDICTED ENVIRONMENTAL AND SOCIAL IMPACTS
From an assessment of proposed Phase 1 sub-project components, baseline conditions and consultations, with experiences and lessons gained fkom similar types of World Bank-funded projects in Vietnam, the following key sources of potentially adverse environmental impacts were identified and are recommended for detailed management, mitigation and monitoring measures:
Dwing construction process (land clearance):
o Increased dust levels due to earth work excavation and construction activities
o Social impact due to resettlement
Impacts on the construction phase
o Impact of the construction work; street excavations and material transportation
o Impact of embankment construction of canal, lakes
o Transport and disposal of dredged sediment from canal andlakes
Impacts during the operation phase
o Wastewater management and drainage operation
4.1. Impacts during pre-construction phase
Preparation works are likely to produce solid waste as a result of demolishment of existing buildings.. They may also have a negative impact on the air quality by increasing the level of dust, C02, S02, and N02. However, the level of impacts during this phase is insignificant.
Water quality can be affected due to demolishment and relocation of houses, which sites could potentially washed by rainy water and directly discharged into nearby ponds. As for the quantity of site clearance, there are over six households being entirely affected by the Project, in which they are losing about 473m2 of land, and 52 households and business operations affected only temporarily.
4.2. Impact during construction phase
4.2.1. Impact of primary and secondary Main Drainage Construction
4.2.1.1. Increased dust levels due to earth work excavation and construction activities
Dusts are generated by construction equipment and during the process of fuel as gasoline and diesel. Total volume of soil to be excavated to install culvert lines is estimated to be about 70,549 m3. A part of these soils will be re-filled with black sands and the remains will be transported out of the construction site. It is estimated that trucks will have to transport the disposed soils about 14,100 times. According to the construction schedule of about 3three years, this is translated into about 2-3 trips per day by trucks over 10 krn of road. The traffic volume could increase be increased during some specific time of construction; however, by
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VIETNAM URBAN UPGRADING PROJECT -NAM DINH L'RBAN UPGRADING SUB-PROJECT Phase 11 Enironmental I m ~ a c t Assessment (EIA) April 2009
the experience in the Phase 1 and the construction component, the traffic will not exceed 25 . trips per day.
Each carrying truck shall consume about 0.0025 tons to 0.003 tons of diesel and each time it would serve average operational distance about 10 krn . Hence, a total amount of diesel to be used would amount to 42.3 tons. Besides the pollution produced by consuming fossil he l , transportation of soils, rock, and construction materials shall increase the level of dust in the air.
The dust diffusion can be easily controlled and minimized by a reasonable separation of transportation lines by regularly watering the construction sites as well as covering and washing the path to the sites. Major subjects bearing the impact are residential communities living near the construction site, and pedestrians, especially for those who regularly appear at crowded markets as Cua Truong market, Nang Tinh market, Hoang Ngan market, Dien Hong market, and school area as the road running to Nguyen Trai street, and other main street as Dien Bien going to Ha Noi.
4.2.1.2. Noise and Vibration of Transport Vehicles and other Construction Equipment.
A large number of construction activities can be a cause for vibration and noisy.. Noise caused by construction machinery shall mainly be detonating sound of construction equipment. The predicted noise levels one (1) m from the point source of noise is based on the formula (Pham Ngoc Dang, 1997): Noise level produced by construction equipment is estimated at table as below:
L, (X) = L, (Xo) +20 log10 (Xo/X)
L,(Xo): noise from 01 with the source (dBA)
L,(X): the noise at the location that needs to be calculated
Table 0.1. Predicted Noise Levels from Construction Vehicles and Equipment
Type of Vehicle
and Equipment
Bulldozer
National standard (TCVN 5949-1998): 50 - 75 dBA (between 6 AM - 6 PM) for residential areas
Leveler
Excavator
Truck
Concrete mixer
National standard for working environment issued by Ministry of Health: 85 dBA (8 hour work day)
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Noise Level - 1 rn from Source
72.0
72.0 - 84.0
82.0 - 94.0
75.0 - 88.0
Predicted Noise Level
10 m from Source
73
Range
Predieta$ Noise J m d
20 m from Source
67.0
Average
93
74.0
78.0
88
81.5
5 4
5 8
68
61.5
62
55.5
VIETNAM URBAN UPGRADING PROJECT - NAM D!NH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
The noise level could be higher due to some noise sources operating at the same time and , together with the transport vehicles (fiom 82 to 94 dB). In some cases, noise could be higher
than the national standards at a distance of 10 m from the noise sources. It is predicted that some residences and businesses along narrow streets could be affected which is expected to last not so long time for each street section and the noise management
4.2.1.3. Water environment impact
During construction process, main impacts are made on surface water environments, while leaving underground water hardly affected.
Underground water: Construction activities may cause underground water pollution as a result of excavation, pipe installation and canal and pond dredging. In fact, water must be pumped out of ditches, canals and ponds must be also pumped before putting concretes. Excavation will be done on average 2 -3 meters from ground surface. Therefore, impact on the underground water environment is considered negligible during construction period.
Waste water run-on: Waste water run-off mainly consists of: a) rain water washed out soil that is generated from construction, b) waste water from workers (mainly high concentration of SS, BOD, COD, coliform); c) waste lubricant and lubricating oil for engines. Waste water will be discharged into ditches, canals and rivers. In some cases, water can be stagnant in ponds, lakes, rice fields and hollow areas.
4.2.1.4. Solid waste
Solid waste from activities of workers: According to statistical data, each urban resident produce about 0.5 - 0.75kg of garbage per day. However, as mentioned above (item 4.2.1.3), almost workers are temporary and seasonal workers, living in the city or in adjacent areas. These workers will come home from work, so garbage of each worker at site is only about 50% of the above volume (about 0.25 - 0.4 kg of rubbish/personlday). Accordingly, for 50 workerllpackage x 5 packages, a total volume of solid waste will be 62.5-100kgIday.
4.2.1.5. Leakage of Residual Grease and Oil
During construction, grease and oil residuals may be generated from maintaining and repairing vehicle and machinery. The grease and oil residuals are recognized as a hazardous waste (code: A3020, Basel: Y8). If strict management measures for collection and disposal of residual oils are not applied, such residual wastes can be a potential source for soil and ground water pollution.
4.2.1.6. Impact on Traffic
Stockpiles of excavated soil and materials along the street excavation sites can cause temporary disruption of normal traffic flows and pose a high risk for traffic safety,, Based on the calculations and the experience in the Phase 1, the amount of excavated soil can amount to maximum of around of 3 - 4 m31 m of road. Most traffic in the project streets consists of motorcycles and bicycles, which can easily adjust to traffic flow patterns. Proper traffic management and public safety measures are required to minimize these temporary traffic impacts and possible disruptions.
- 4.2.1.7. 1,oss of income and unemployment situation
-
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Impact will be temporary but significant for some business and trading owners , especially - for those at Nang Tinh market comprising 38 private business households whose business will
be interrupted during the construction as the culvert lines will run through the existing market.
- 4.2.2. Impact of embankment construction, dredging, transportation and disposal of Sediment from Canal and Lakes
4.2.2.1. Increased dust due to movement of transportation vehicles and construction equipment
A large amount of dust shall affect directlyworkers because of their frequent contact with high dust concentration and shall bring inconveniences to daily living of habitants in the construction areas. The most seriously affected subjects are the habitants who live near the construction site, especially in the dry season.
4.2.2.2. Noise and vibration of transportation vehicles and other construction equipment
Noise and vibration will generate from big construction equipment (bulldozer, concrete mixer, truck...). It is also caused by demolishing underground works. High noise level would affect directly health of workers that are operating equipment or working at the site as well as people living within 10m around the site. People living farther than 1Om would be less affected. The impacts of noise and vibration would be higher in case a large number of equipments operate concurrently.
4.2.2.3. Run-off water
It bears high contents of suspended solid and turbidity because of soil during construction, of which the most considerable pollution source is rain water overflow. Volume of run-off water depends on rain intensity, duration and open construction area.
4.2.2.4. Domestic wastes generated during construction
Domestic wastes which are generated during construction process include wastewater and solid waste by workers at the site. Its impact is not significant.
4.2.2.5. Impacts on local traffic
It is anticipated that the increasing volume of vehicles due to the movement works is about 8 turns of vehicle per hour along the whole implementing routes. Roads which are planned to be the main routes for materials transporting are Giai Phong, Tran Hung Dao, Dien Bien.
4.2.2.6. Impact on landscape
Within the project area, there is only historical monument of Dinh Bai Pagoda, which is locating near Truyen Thong Lake, and shall be partly affected during the course of dredging and constructing the lake embankment. People going on pilgrimage shall face with barriers.
Dredging and embankment works of the lakes shall partly cause disorder in their scenery especially for mud dredging which creates bad smell as well as scattering situations of liquid mud to surrounding areas if works are not properly managed.
4.2.3. Impact of dredging, transportation and disposal of sediment from Canal and Lakes
4.2.3.1. Impact by dredging
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During the process of dredging, sediment which lies at the bottom of the canalllake will need to be managed. As the stagnated sediment accumulates and disintegrates for years, it will generate exhaust fumes when contacting with the air. The generated fumes consist of Methane (CH4), Sulphure Hydro (H2S), Carbon Dioxide (C02), which are the main fumes causing unpleasant and bad odor to the surrounding place, especially in case the dredging is implemented in the dry season.
Sediment raised from the bottom of the river also leads to some increase in the content of other contaminants in the water such as heavy metal and bacteria accumulated in the bottom sediment. However, because channels and ponds which are not maintained, existing aquatic creatures and water quality of ponds and lakes are generally bad. Proposed dredging activities are expected to support recovery of flow, water changing capacity and water quality for these ponds as well as system of ponds in the area.
4.2.3.2. Impact by the transporting the sludge
Sediment samples were collected within the proposed dredging areas in October 2007 and tested for key quality parameters (Hg, Cd, As, Cr, Pb and Zn).to assess disposal impacts and any special handling requirements. The summary results of this sediment testing are provided in Table and supporting laboratory results are Annex 2 of the main report. There is no Vietnamese sediment quality standard and hence similar quality standards and sediment classifications used in recent EAs prepared for the World Bank funded projects, in Ilutch Soil Clean-up Guidelines (1995; 1999), PEL standard (Permissible Exposure Limits), OSHA (Occupational Safety & Health Administrations) and TCVN 7209-2002 (for agriculture land) were applied and summarized in the Table 02 below.
According to the results of the tested parameters and standards, the sediments to be dredged can be classified as safe for use or disposal without treatment. Following general practices and land use in the area, it is expected that these dredged sediments will be used for agricultural andlor landscaping near to the dredging sites. However, with total volume of sludge is 22,465m3 and if 5m3 tank trucks are used, the estimated number of trucks needed is 8,000 trips (25triplday). Because the dredged sediment is easily to leak on the transportation route, so it is necessary to apply the safeguard measures in an appropriate way during transportation.
Table 0.2 - The analyzed results of sampling on 101 2007
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1
2 3
4
5
6 7
8
Parameters
Ash
TS As
Hg Zn Cd
Pb
C u
Unit
Yo
Yo
mgkg
mgkg
mgkg
mgkg
mgkg
mgkg
Value TCVN 7209- 2002
12 - 200
2
70 5 0
B1
63.5
13.4 <0.001
< 0.001
0.74
< 0.01
0.017
0.28
Dutch Soil (Type 1)
55
1.6
B1
60.9
15.6 <0.001
< 0.001
1.52
< 0.01
0.023 0.32
.
PEL @P)
17
0.49~103
B3
70.7
20 <0.001
< 0.001
0.96
<0.01
0.019 0.41 --
530 91.3 90
VIETNAM LIRBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Source: Nam Dinh measuement and stadard. 2007
- Note: - BI : Nang Tinh (20024'56"N; 106"10'18"E) - B2 : Bao Boi (20025'33"N; 106"09'41 "E) - B3 : Phuc Trong (20025'40"N; 106"09'25"E)
Based on the above norms, the consultant conducted surveys and worked with functional bodies as well as the authority and local people and recommend a dumping site of muddy and rocky waste (at Nam Van and Nam Phong sub-urban wards in the other side of Do Quan bridge), which is about 3-4 km away fiom the city's center (running along the dyke and away fiom residential area). The treatment and management of the mud dumping site should also be taken care of to avoid the situation where mud is being spread over surrounding area (despite the fact that quality of mud satisfies for the use of agricultural purposes as analyzed above). This issue shall be analyzed in detail in mitigation solutions.
4.3. Impacts of wastewater on uptake water for water treatment plant during project operation
The upgraded drainage system shall significantly improve the capability of collecting waste water from residential and production factory and the most concern is how the quality of
- water uptake would be affected by wastewater pollution discharged fiom Quan Chuot pumping station.
A mathematical model has been used to calculate the increase of BOD5 at uptake water point in three assumptions of operation condition: average, high rainy reason and high dry season for the scenarios of period 2012- 2020. The solutions of the model have shown the increase of BOD5 at water uptake point is not so high (from 1.07 to 1.58%) in average condition during a year. However, the BOD5 could much increase in most disadvantageous operation regimes of rainy season, from 16% (in 2012) to 24% (in 2020) and dry season, from 34% (in 2012) and 38 % (year 2020). In fact, pumping station is seldom operated in disadvantageous regime and it can be generally judged that water quality at uptake point affected by project will reduce about 5-10% which is considered as low chance. However, water quality of Dao River does not currently meet standards for water supply for water treatment plant (TCVN 5942:1995 Column A (BOD5 < 4mg/l), so the operation of pumping station could make more water pollution seriously for uptake water. . ~
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VIETNAM URBAN LIPGRADING PROJECT - NAM DlNH URBAN UPGRADING SLIB-PROJECT Phase I 1 Enironmental Impact Assessment (EIA) April 2009
Figure 0.1: Location of discharging points of Quan Chuot pumping station (on Red river); Kenh Gia (on Dao river) and location of water collectingpoint of water plant on Duo river
4.4. Land acquision impact
The design was revised to minimise effects of the project, it is expected to recover 14,8861112, of which 1,87 1 m2 are residential and 13,O 15 m2 are agricultural land. About 1,200 m2 of houses, constructions, auxiliaries works; 399 plants of all species, 2817 m2 of standing crop will be affected.
Field survey of effects of the project showed that there are about 99 households affected by the project (61 households due to permanent land recovery and 38 business households affected temporarily during the sewer construction period). Within these households, 2 households will be demolished, however, there is sufficient land for rebuilding; 4 households have to resettle in a new place. In additional, there are 9 organizations affected by the project due to land recovery.
The project does not affect any culture works (pagoda, temples) at the area. There are no ethnic people living at the project site.
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Based on the predicted Phase 2 environmental impacts, appropriate mitigation measures are identified and described for each of the key project stages and types of impacts, including:
Mitigation Measures during preconstruction EMP proposed that the cooperation among authorities in dividing suitable construction sections to mitigate impacts on the air environment and scenery in the area. Resettlement policy to be applied during the course of carrying out the Project on Infrastructure Upgrading of level 1, 2 Phase 2 - Nam Dinh city shall be harmoniously carried out in accordance with requirements of the World Bank (Safeguard Policies 4.12) and laws and regulations of Vietnam
Mitigation Measures during Construction, Series of mitigation measures to fight with above impacts have been developed that could be categorised as follow: (1) Mitigation measure for air pollution, noise: (2) Mitigation measure for water pollution: (3) Mitigation measure for domestic waste (4) Mitigation measure for solid waste of construction; (5) Mitigation measure for oil residual leakage control
EA also has developed the specific mitigation measures for dredging of sediment from Phuc Trong canal, Bao Boi and Nang Tinh lakes including (1) mitigation measures to minimize impacts during dredging (2) Mitigation measures to minimize impacts during transportation
- (3) Mitigation measure for dredged material disposal. (4) Mitigation of environmental incidents.
Mitigation Measures During Operation, A series of mitigations measures has been proposed to include the short and long term solutions. Short term solutions are: 1) not to pump waste water to the Red river when river capacity is under average, 2) to utilize ponds and lakes surrounding the pumping station for primary treatment, 3) to maintain management and monitoring program, 4) to regularly carry out dredging of lakes and culvert lines in order to improve the circulation and ability for self-cleaning, 5) to raise public awareness for protecting the environment, 6) stop disposing rubbish to lakes and drainage ditches and canals and growth trees on the embankment, and corridor, and 7) to set up operational schedule and ensure safety for drainage construction. Long term solutions are: 1) the uptake water point should be relocated prior to discharging point of Quan Chuot pumping station, 2) households should build self-decomposed toilets, 3) industrial and hospital waste water sources should be treated in compulsory and in next 10 year, 4) common waste water treatment plan for whole city should be built to treat wastewater meeting standards before being discharged into the river.
5.2. Environmental Monitoring and Reporting
5.2.1. Objectives
- Control impacts made by the project construction as addressed in the EIA Report.
- Check and supervise the implementation of solutions for environmental protection in the course of construction, which is on basis of the mitigation impacts solutions as basically addressed in the appraised EIA Report.
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- To recommend supplemental and enhancement of mitigation solutions upon the occurrence of impacts or has not been forecasted.
5.2.2. Project performance indicators
The performance monitoring indicators will be set based on the final EA report, EMP and Project Appraisal Document (PAD) as well as the findings and recommendations of the Environmental Monitoring Consultant (EMC) to be appointed under the project activities.
The PMU will prepare and submit to DONRE and the Bank the semi-annual performance monitoring reports, which will detail project progress against the agreed targets, including the agreed environmental project performance indicators on the following:
- Contractor compliance with the mitigation measures and ECOP.
- Flooding situation
- Wastewater and environmental sanitation
- Community stakeholder participation
The environmental monitoring program is carried out during 3 phases of the project: Phase before the construction (baseline environment); Phase of construction (planned to be in 3 years); Phase of operation (the first year upon the project is put into operation). Responsibility of environmental monitoring and supervision belongs to the Environmental Supervision Consultant.
5.2.3 The function of all parties/person in project environmental management organization
The proposed organization and relationship of the project's environmental management, mitigation and reporting roles and responsibilities is presented in Figure below.
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World Bank Nam Dinh CFC+ +DONRE
A t ! Env & natural
resources Depart PMU -' 4
Ward I v v v
Environmental Staff
EMC CMC 1 Community Supervision
v v Contractor
4+*
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Project management unit (PMU)
The Nam Dinh PMU has the main responsibility of the implementation and monitoring of the EMP. PMU will formally designate qualified members as their environmental staff, who will conduct environmental supervision during the course of sub-projects implementation to ensure that the EMP set out in the approved EA report is properly implemented.
The PMU shall work closely with community representatives to promote the community participatory process in the whole process of the project implementation including planning, management, O&M and monitoring.
The PMU shall also maintain close cooperation with the relevant enterprises in charge of water supply, sanitation, solid waste collection, etc. to monitor the O&M during the operation of the project.
Construction management consultant (CMC)
The main tasks of CMC are to monitor basic construction practices and procedures, including Environmental Code of Practices (ECOP) for mitigating environmental impacts as described in the draft EA. These tasks will be stipulated in detail in the Terms of Reference (TOR) for the CMC and contract with the PMU, both of which are subject to Bank reviews for issuance of a No Objection Letter (NOL).
Environmental Monitoring Consultant (EMC)
The EMC will be responsible for detailed design of the safeguards monitoring program in accordance with regulatory and procedural requirements of the GoV and the Bank. Following reviews and approval of the safeguards monitoring plan, the EMC will be responsible for monitoring overall project implementation activities and ensuring that agreed environmental safeguard policies of the GoV and the Bank are applied and monitored
Responsibility of the Contractor in environmental management
The environmental management is one part of the site quality management work. In the environmental management plan, the Contractor will propose necessary measures to minimize the project impact on the environment during construction and will submit these plans to PMU and CMC for review.
However, the plans will be reconsidered if any change in the legislation or proper adjustment to specific site cases.
5.3 Capacity building
The PMU and relevant bodies (independent consultant for environmental supervision, consultant for capability enhancement of component 6 Phase 11) should organize training courses to improve understanding and experiences in management of environment.
Participating to such training courses are coordinators of bidding package, environmental officers, public community of the PMU, construction supervision consultant, contractors and local authorities at places where the project is implemented, and representatives of people living in the residential areas.
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Depending on the type of classes and the participants, content of training courses shall be discussed in detail with the PMU so as to make it fit with scales and levels, and the project schedule.
5.4. Budget requirement for environmental management, mitigation and monitoring
A summary of the proposed budgets for recommended environmental management, mitigation and monitoring measures is presented in Table 3 for each of the following key EMP implementation activities:
- Environmental training: Implemented for the local authorities and communities to take part in environmental monitoring (Consultant contract package No. 17.2).
- EMC: including costs for environmental observation & analysis, for environmental monitoring training and salary of the consultant during construction process of phase 2 (Package 26 - Environmental monitoring for Phase 2).
- Environmental monitoring by the Construction Management Consultant (CMC)
- EMP administration and management responsibilities of the PMU
Table 0.3 - Estimated Budget Costs for EMP Implementation (in USD) - -
1 I related staff of PMU (PMU has not been I I I
1
2
Description Implementation of Mitigation Measures
) contracts Training community, contractor, CMC and ( 9,000
2.1 2.2 3
Note: Proposed budget costs exclude VAT, contingency and escalation costs
Loan
3.1 3.2
Thang Long Infrastructure Developmerlt Joint Stock Company (Infra-ThangLong) 22
Proposed Budget Costs included in construction
train in Phase 1) in environmental field Development of training documents Conduct training Samples observation and analysis;
Source of Budget Loan proceeds
preparation of environmental monitoring Preparation of report (1 4 reports) Samples observation and analysis
Total
5,000 4,000
4 1,000
19,650 21,350 50,000
Loan proceeds
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Environmental Impact Assessment (EIA) April 2009
CHAPTER 1 PROJECT DESCRIPTION
1.1. Background of the project
Vietnam is a developing country and coming along with the increasing of industrialization and modernization, the urbanization of Vietnam also increase rapidly. It is, therefore, leading to a continuously adjustment of social structure in order to make it keep up with general development. The technical and social infrastructures serving public demands inside urban are poor and due to the capability of providing funds needed for maintaining and repairing is un- timely, such systems are being downgraded with time. On the other hand, Low-income areas have developed, and are continuing to develop, in an ad-hoc unplanned manner with little infrastructure and services. This has created environmental and health hazards for their residents and the city at large. New, innovative and low cost approaches were thus required to address Vietnam's growing urbanization challenges.
To satisfy longtime and strategically target of the urban development, the Vietnamese Government proposed the World Bank to give financial support for upgrading urban infrastructure and basic services in low-income areas of four Cities (Can Tho, Narn Dinh, Hai Phong and Ho Chi Minh). Six components of the Project, namely:
Component 1 - Tertiary Infrastructure Upgrading.
Component 2 - Primary and Secondary Infrastructure Upgrading .
Component 3 - Resettlement housing.
Component 4 - Land management and housing.
Component 5 - Lending program for housing improvement.
Component 6 - Capability enhancement.
Narn Dinh city is one of four cities being subjected to the Project. A city of longtime history, formed since 1 3 ' ~ century, and has been experiencing different development periods. In 1994, the Government recognized Narn Dinh as 3rd category urban. After a time of development, the Government recognized Narn Dinh as 2nd category urban in 1998.
The population of Narn Dinh City is estimated 290,000 in 2005, of which an estimated 240,000 live in the urban area. The infrastructure in the low-income areas is very poor such as single-storey buildings and temporary houses comprise over two-thirds of the housing stock; access lanes to houses are, in many cases less than 3m wide; many households lack of water metered connections, drainage systems or solid waste collection services. Major primary and secondary infrastructure improvements are required to serve the desired of local upgrading works
Beginning of infrastructure upgrading sub-project in low-income residential areas of
Narn Dinh city is: Pre-feasibility report for the infrastructure upgrading of low-income
residential areas of Narn Dinh city - Narn Dinh province was prepared in January 2003 (CDC
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 23
acted as Consultancy unit) and approved by the Government at Document No 491lCP-QHQT
dated 2 1 st April 2003.
The pre-feasibility report defined as following:
Priority should be given to Tertiary Infrastructure Upgrading, including road,
electricity, school, station, water supply and drainage, environmental hygiene for
22 low-income residential areas under 15 former wards (now known as 26
residential areas under 19 wards which was asdded 5 newly established wards);
Primary Infrastructure Upgrading : Construction of upstream water pumping
station in Quan Chuot with capacity of 15 m3lsecond to enable basic drainage of
the City's North basin in synchronization with construction system of Kenh Gia
water pumping station with capacity of 12m3/second, which making drainage
for the South basin of city (constructed and operated).
Primary and Secondary Infrastructure Upgrading: Already updated by the World
Bank Project Management Unit of the City in order of priority to connect the
tertiary infrastructure of low-income residential areas with the Primary and
Secondary Infrastructure Upgrading and thus makes it a system to uphold the
investment effectiveness.
1.2. Objectives of the project
To serve low-income residential areas, minimize flooding situation of residential areas,
and improve living standards of poor residents by improving the environmental condition.
Assessing and thoroughly utilizing the working capacity of the existing drainage
system as canals, lakes, major drainage lines; upgrading and rehabilitating axle culvert
lines of infrastructure system level 1, 2 in connection with the infrastructure system
level 3 of low-income residential areas and structures of the infrastructure system level
1 in order to form a complete system and effectively develop the working capacity of
the infrastructure upgrading construction of component 1 phase 1, 2 and component 2
of Phase 1, 2. The system shall minimize local flooding situation of 31 points inside
the city.
The project implementation shall remarkably contribute to the improvement of
public health, limit disease contaminations throughout drainage system, and basically
improve hygienic condition.
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Apart from the socio-economic meanings, the Project also gives significant
political meanings. Actual actions show the interest of the Government and
International Community toward low-income residential class. It also helps create the
belief of poor people to the government and the future. This support will greatly
encourage them to work and strive for a better life and public development.
On the other hand, the infrastructure improvement will give a chance for
residents living in the upgraded areas to expand their exchanges, and communication
to the open world, thus provide opportunities for better business activities and jobs to
improve their living standards as well as attract the interests of investors to the
development of suitable production sectors in the area.
1.3. Project Location and baseline data of the city
1.3.1. Geographical position
Nam Dinh province is one of three tops of triangle in the Red river delta, and is also the
development triangle of the Red river delta. This region is the richest one with densest
population in the North of Vietnam. Being located in the South Eastern of the Red river delta,
Nam Dinh plays an important role in the domestic exchanging flow between the Red river
delta and the coastal area; between inland area with coastal area of the Red river delta; and
between inland area with Middle North Coastal area.
Owning a long coastal line, Nam Dinh is the third crowded point of three tops in the
delta triangle, and only stays after Hai Phong due to its export-import function as a coastal
city and stays after Ha Noi which is a political - economic - cultural center of the entire Red
river delta and the whole country. If Nam Dinh does not strongly develop its coastal area, the
domestic - coastal exchanging flow will be obviously reduced and if the national road No. 10
is not developed, then exchanging flow between the North coastal area and the Middle North
Coastal area will be paralyzed. Finally, Ha Noi - Hai Phong - Nam Dinh - Ninh Binh, the
main traffic axle will be a basic for general development of exchanging flow of domestic and
coastal areas.
Nam Dinh city is located on the right bank Red river which followed the water flow and
the left bank of Dao River crossing, and is 90 km away from Ha Noi toward the South-East.
Nam Dinh has currently been upgraded to the city type 2, and being township of Nam Dinh
province. It is an economic, financial, commercial, and technological exchanging clue in the
South of the Red river delta.
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VIETNAM URBAN UPGRADING PROJECT - NAM DINH URBAN UPGRADING SUB-PROJECT Phase I1 Environmental l m ~ a c t Assessment (EIAl Awil2009
Nam Dinh city is located at 20~27'35" + 20~23'33" Northern latitudes and at
106~07'15" + 106~07'05" Eastern longitude. The boundary between Nam Dinh city and its
vicinity is defined as follow:
- Bounded by My Loc ward in the North;
- Bounded by Nam Truc ward in the South;
- Bounded by My Loc ward and the Red river in the East;
- Bounded by My Loc and Vu Ban wards in the West.
Total natural land area of the whole city is 4632ha, in which the inner city is 852 ha.
Nam Dinh City has 20 internal wards and 05 sub-urban communes
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Figure 1.2 Sateline picture of Nam Dinh city
1.3.2 Topography, geology & ground featurings
Being formed by the Red river delta allwial, Nam Dinh city terrain is quite even and flat towards the North West - South East (towards the sea of the Red river delta) with the average level of 0.5m + 4.0m compared with the sea water level. The level of rice field is 0.5m - 1.5m. Locations where are measured under 2.0m level are always flooded due to heavy rains. The dyke at Dao river right bank is built at 6.5m level.
There are not any soil investigation documents for the whole Nam Dinh city. However, based on the survey from the boreholes, about 200 boreholes, to be taken for construction purpose, it is possibly realized that Nam Dinh city has geological features the same as that of alluvial ground with poor force resistance. Following the up-to-down order, the specific profile of Nam Dinh city is as follows:
Covering soil layer
Sandy- clay layer
Clay- sand layer
Sandy - clay layer
Clay- sand layer
Sandy - clay layer
Clay - soil layer
Sandy - clay layer Clay - sand layer
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VIETNAM URBAN UPGRADING PROJECT - NAM DINtl URBAN UPGRADlNG SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
Basically, the above layers are special ones of alluvial grounds with poor force resistance (<lkgf/cm2). The underground water level varies around -0.7m level from the ground surface without non-erosion characteristic.
1.3.3. Climate condition
Nam Dinh city lies in the tropical monsoon climate area of Tonkin delta, in which:
1.3.3.1. Temperature
+ Annual average temperature +23.7OC
+ Average temperature in summer +27.S°C
+ Average temperature in winter + I 9.5OC
Air temperature at project area brings general nature of Nam Dinh city.
There is no big difference of yearly average temperatures.
'The average temperature of the months varies from 1 6 ' ~ to 3 0 ' ~ . The highest temperature in the year is in July and the lowest is in January as recorded. (Table 1 of Appendix I )
The air temperature is a natural factor which plays important role in scattering and
transforming toxic substances in the air as well as in the process of disintegrating organic
substances.
1.3.3.2. Humidity
+ Annual average humidity 84%
+ Highest relative humidity 94%
+ Lowest relative humidity 65%
Based on statistical results, the humidity always stays at high level by years (over 83%).
The air humidity reaches highest level in May until October and at the lowest in February as
recorded, resulting from being located in tropical monsoon climate area with two different
seasons: sunny season and rainy season. However, there is no remarkable difference of
humidity between the two seasons in the year. (Table 2. Appendix 1 )
Humidity also plays an important factor which may affect the process of transforming
and disintegrating toxic substances so it create favor conditions for microorganism growing.
In addition, the environment with high humidity level also helps to spread epidemic diseases
and pathogenic insects as fly, cockroaches. mosquitoes and so on.
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VIETNAM URBAN UPGRADING PROJECT- N A M DINH URBAN UPGRADING SUB-PXOJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
1.3.3.3. Rainfall
+ Annual average rainfall 1,829.8 mm
+ Maximum daily rainfall 350 mm
Rainy regime in Nam Dinh is decided by circulation of monsoon with a rainy season and a dry
season. Rainy season which is also flood season lasts for 6 months (from May until the end ofOctober
annually. In recent years, there have not been so many changes in rainfall of Narn Dinh city. Rainfall
is not remarkably seen in dry season. But it mainly occurs in rainy season from May to October and
occupies approximately 90% of total volume of the whole year. Rainfall reaches highest level in the
period from June to October. (Table 3 - Appendix I )
1.3.3.4. Solar radiation
Narn Dinh is the region which must suffer quite big heat from the sunshine. Sunny and
radiation hours reach highest level at the beginning of dry season. In general, the average
number of sunny hours of months in 2006 does not change much compared with the years
2005 and 2004. In average, the highest number of sunny hours was recorded in June 2006
(188 hours) and the lowest was recorded in March (20 hours). Illumination duration of the
entire year is 1420 hours, which is recognized to be higher than that of 2005. (Table 4 -
Appendix 1)
1.3.3.5. Wind
Narn Dinh city suffers the annual average wind speed of 2.4 m and maximum wind
speed by storms of 48mlsecond. There are two wind directions in the year:
- Main wind direction in summer: from the South East;
- Main wind direction in winter: from the North.
According to statistical documentation, in the past 50 years (since 1955), in average,
Narn Dinh has being affected by 2.2 typhoons for each year, even 7 typhoons in 1973 and 6 in
2005 as recorded. In some years, there is no typhoon in Narn Dinh city. However, there are
many wind phases at level 6, 7 in coastal area of Narn Dinh every year.
Typhoons coming from Quang Ninh province through Ha Tinh province always have
some certain affects on Naln Dinh province with different degrees:
+In case the typhoon directly enters Narn Dinh, wind always comes from 4
directions, but rainfall is not maximum; the average rainfall is about 130 mm, and
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maximum level is 360 mm. Once the centre cyclone coming the city, the sky is clear
with mostly windless for tens of minutes;
+Once typhoon lands in Hai Phong - Quang Ninh province, it causes heavy rain
in Narn Dinh (especially in the beginning of season). The average rainfall reaches 170
mm. A special case occurred as the typhoon No. 5 landed in Da Nang province in
September 2oth, 1978, it created 400 mm of rainfall in Narn Dinh;
+Storms landing in the Middle North Area: typhoon which land in Thanh Hoa -
Nghe An province always cause strong wind with long-time rainy, and high tide in
coastal area of Narn Dinh province; highest tide reaches to 3 m (not mentioning to
wave height).
In conclusion, winds coming from the South Western and North Eastern directions cause the
most disadvantages for dyke system of Narn Dinh.
(Source: Conference report on "Improving the public capacity in dealing with natural
disasters in 2006, Narn Dinh'?
1.3.4. Hydrology
The city lies at confluence of the Red river, 500-700 meters wide, and the Dao River,
300 meters wide. These are two main rivers affecting the hydrological conditions of the city.
Besides, there are some small rivers of 30 - 50 meters wide connecting the canals and ditches
to create a density hydrological system serving for the agricultural production of 5 suburban
wards and urban drainage.
Rivers, dykes, and ditches system of Narn Dinh city comprises:
1.3.4.1. Red r iver
The Red river flows by the Eastern border between Narn Dinh city and Thai Binh
province. The length of river in the section through the City is 72 km, and from 700 to 800
meters wide taking averagely. The average flow, as measured for years at the middle river, is
3,800 m3/s, maximum flow is 37,800 m3/s, and minimum flow is 440 m3/s.
(Hydron~eteor.olo&v-station of Nan1 Dinh, 2006.)
1.3.4.2. Dao r iver
The Dao River tlows by the North Eastern - South Western direction of Narn Dinh city,
and being the main water supplying soLlrce for living and industrial production of the city.
The water sources of Dao river come from the Red river, in the south of Tan De bridge, and
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join the Day River in Hoang Nam suburban ward, Nghia Hung district. The river is of 34 km
long, and featuring as follows:
Table 1.1: Hydrographical specification of the Dao river
1 No I Norms I Unit 1 Value ( 1 1 1 Average water level I m 1 1.52 1
1 4 1 Maximum water level in drv season I m 1 0.6i0.8 1
labor medal grade 3 by the State. Tran Hung Dao High School is a high quality school of the
City.
There are also some universities such as: Narn Dinh Convalesce University - Vietnam
Ministry of Health Care, Narn Dinh University of Teaching and Technology - Ministry of
Labour, Invalids & Social Affairs, University of Industrial Economic and Technique - Ministry of Industry and Trade, Luong The Vinh University (1" non-state owned University
in Narn Dinh City.
1.3.6.6. Community health
In the year 2006, there are not so many remarkable changes in community health.
Poultry flu epidemic was not controlled well.
+ Health care centers of Narn Dinh City is as follows:
Table 1.6. Health care criteria of Narn Dinh City
I Itern
1
I wards I 1 1 1
Number of health care
bases (bases)
- Local testing room
- Medical station at communes and
2 / Medical staff i I 1 I
Health care base
- General hospital
Number of sick- beds (beds)
3
2 5
I I I I
1 - Nurses I
I I 5 82
Staff (person)
1
- Doctors and post- graduation staff
- Nurses and technician
Source: Statistical yearbook of Narn Dinh province 2006.
1,310
3 0
125
There are currently 35 health care units, including 01 biggest general hospital at
-
-
provincial level, 01 metropolitan medical center with functions of propagation for improving
434
13 1
residential health and treating epidemic diseases, 04 local testing rooms and 25 medical units
in communes and wards with the total of 1,320 sick-beds. There are some well-known
hospitals such as: E hospital, I hospital, metropolitan hospital, Central hospital.. .
(*source. Narn Dinh Health Care Center)
T'hang Long Infrastructure Development Joint S ~ o c k Company (Infra-ThangLong) 40
System of medical units basically meets demands of residential health care. However, it
is recognized that there is a lack of many equipment and facilities. At ward level, some
medical unit have no their own building, so they have to be located in other companies,
affecting much service quality.
+ Disease situation at the area in relation with the project. Through survey of 110
households along improved alignments (October 1012007) carried out by Coffey Consultant,
disease situation of the area is as follows:
Table 1.7 Statistic of diseases of households on invested and upgraded alignments
1 I Total of household with patients 60 5 5 I I
2 Respiratory diseases 35 32 1 3 1 Bowel diseases I 15 1 14 I
1.3.6.7. Historical relics
Optic diseases Other diseases
+ Narn Dinh City: Main works with cultural and historical values in the city comprises old Tuc Mac village, Den Tran cultural vestige area, Truyen Thong lake area, antiques museum, Vong Cung pagoda, Ca pagoda, House No. 187 in Ben Ngu, Hung Vuong Road, Khoai Dong church, An Phong church, Big church, Gieng temple, Phong Loc church.. .
3 0 4
- Rong market: is the biggest market of Narn Dinh province. The market'name is Rong (dragon) because at the time of construction, the market is located at the eye of "dragon" flying within Narn Dinh City.
- Vong Cung pagoda: was built from Nguyen Gia Long King (1 802 - 1920). In former time, this place was always used for welcome royal during every royal trips to Narn Dinh. There is a throne for the King in the pagoda. This explains why its name is named Vong Cung.
- Do Quan bridge: This is the biggest bridge of Narn Dinh province. It is made of reinforced concrete crossing former Do Quan at the end of Tran Hung Dao Street, connecting Narn Dinh province and 6 wards in the southern of the province.
- Narn Dinh flag tower : was built from 3'" year of Thieu Nhi King in 1843 at the center of Narn Dinh City, the main side facing To Hieu Street.
- House No. 7 on Ben Ngu street: This is one of oldest house of Narn Dinh until present. In respect of architecture, the house helps us understand well how houses of Narn Dinh residents were at 1 9'h century.
Thang Long Infrastructure Development Joint Stock ~ o r n ~ a n ~ ( ~ Z r a - ~ h a n ~ L o n ~ ) 41
Historical vestiges closely to the project: On upgraded alignments under Component 2, phase 11, there is almost no upgraded alignments run through the above vestiges. Only on embankment alignment of Truyen Thong lake, there is a 50m section of embankment which runs through the front area of Dinh Bai pagoda (See Figure 1.3.
Figure 1.3: Dinh Bai Pagoda location and embankment alignment of Truyen Thong Lake
In addition, Tran Hung Dao statute with 5m high located at good position of 312 square
which the back is Vi Xuyen park, and the front is Vi Hoang hotel, 312 cultural house
Department of Cultural and many flower shops.
1.3.7. Infrastructural features in the project area
1.3.7.1. Water supply
Water supply system of Nam Dinh City was built at the time when French build Nam
Dinh Textile Factory. Spending many years of improvement and upgrading, the city has
possessed a quite perfect water production and supply system, including water production
factory using water from Dao river with capacity of 50,000m3lday; network of transmission
pipes and water supply pipes comprises 60km of pipes with dimensions of 100 + 600mm.
These pipes are mainly made of plastic iron ones and hundreds of service pipes with diameter
of < 100mm which are mainly made of zinc iron pipes and PE pipes.
Water price regulated by Nam Dinh People's Committee is 3500 bonglm3 for domestic
water (this price is also applied for households with consumption < 25m3lmonth) and 4200
VNDlm3 for households with consumption > 25 m3lmonth; 4000 VNDlm3 for water supply
for administrative agencies (schools, hospitals and armed force); 5500 VNDlm3 for water
used for production, capital construction; and 67000 VNDlm3 for business. Water price is
generally low compared with production cost; therefore, the financial source of Water Supply
Company is not enough for system repair and maintenance and the company also faces
difficulties in solving debts.
(*Source: Nam Dinh Water Suppi) C70n?pany)
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VIETNAM IJRBAN UPGRADING PROJECT - NAM DLNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) - April 2009
1.3.7.2. Drainage system
Drainage system of Nam Dinh City is used for drainage of storm water, domestic water
and waste water from production and services, including underground culvert alignments
along streets. There are opened ditched or lakeslponds on some sections. According to survey
results on drainage culvert status, this system was built many years ago and is seriously
degrading now. The total length of operative culvert alignments is around 24,883km with
diameter of 400 +- 1400mm.
The whole drainage system of the city can be divided into 2 main basins: northeast
basin and southeast basin. In 1997-2001 period, with support of Switzerland Government.
Drainage system of the southwest area of the city was improved by construction of Kenh Gia
pumping station with capacity of 45,00Om3/h, upgrading main ditch of Kenh Gia channel
with the length of 4.4km, and improving some drainage pipes in the city. Although pump
station and main drainage channel construction was carried out, flooding situation has not
been remarkably improved. This is caused by the fact that culvert alignments in the city have
not been properly upgraded. Hence, drainage capability of culvert alignments does not meet
requirements. On the other hand, some culvert alignments were occluded or broken down,
resulting in poor drainage capability. Basin in the northeast has not been upgraded yet, thus,
drainage capability of this area is very poor. Management and maintenance of the City's
drainage system is executed by Urban Engineering Company.
Currently, the City has no separated waste water collection and treatment system,
including production waste water and domestic waste water. The whole waste water volume
is directly discharged into drainage ditches; even into locations where may pollute the
domestic water supply resources of the City. Thus, it is necessary to prepare a general plan for
waste water collection and treatment system in coming time with the aim to create a legal
regime for invested project in this field.
(*Source: Nam Dinh Urban Engineering Company and Nam Dinh Urban Development
Project).
- Current situation of drainage system at upgraded area:
Table 1.8 Evaluation on current situation of drainage system at upgraded are
Current situation of drainage I svstem I
No.
1 I - Good I 14% 1
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Drainage system Rate o f households to be questioned
Remark *& li *.&&j d
VIETNAM URBAN UPGRADING PROJECT - NAM DIN11 URBAN UPGRADlNG SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
I 1 - Medium 1 20% 1 1 1 1 - Weak 1 48% I I
- Have no drainage culvert - Self-made culvert
- .
11% 6%
2
I I - Other stagnancy
- Stagnancy due to gabages
general drainage culvert, low terrain,
Reasons for degrading - Have no drainage system - Drainage system is narrow - Stagnancy due to not being
dredged - Stagnancy dut to vegetables and
water-ferns - Stagnancy due to residential
works
( damages, roots
4% 3 5%
52%
20%
7%
18%
Source Statistical investigation data of Cofley Design Consultant in Ocfober 2007
Existing drainage system of the city which is used to drainage of waste water resources
from urban living activities, production and services, public facilities, and storm water, etc.
These resources have a big contain of organic substances, N & P substances and pathogenic
bacteria.
Have no drains &
According to general assessment, there is still some limitations for drainage system as follows:
- Poor drainage in heavy rains;
- Local flooding;
- Collected waste water at the end of pipe is not treated and discharged into rivers, causing water pollution at outlets:
- Have not improved or utilized natural drainage systems (urban ditches and ponds).
1.3.7.3. Traffic road
Traffic towards outside:
- Roadway:
There are two national highways:
+ NHlO which connects Ninh Binh - N a ~ n Dinh - Thai Binh meet standard on plain level I - road surface: 2x7.5+1 ni., build local road on the section run through the urban area, build corridor of 20m for each side in suburbans.
+ NH2 1 connecting Phu Ly - Nam Dinh - Hai Hau - road surface of 15m.
There are 3 provincial road alignments which meet standard level 4 - road surface of 12m:
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT' Phase I 1 Enironmental Impact Assessment (EIA) April 2009
Provincial road to Y Yen
Provincial road 38 to Ly Nhan
Provincial road 55 to Nghia Hung
Table 1.9 Criteria on transport, postal and telecommunication of Nam Dinh Citv
No.
1 Telephone number I each 1 73,769 1 82,706 1 108,809 ]
1 I Traffic roads
Total of wards, communes with asphalt bituminous road to the center
Source: Statistical yearbook of Narn Dinh province 2006.
Items
- Railway: North-South Railway of lm size is national railway network.
Communes wards
- Waterway: Dao River runs through the City, connecting Red river and Day rive. On which, there is one port for commodity transport and one port for passenger transport towards upstream of Do Quan Bridge. Landfall of shiplboat with loading capacity of 600T and tension strength of 150,00OT/year is possibly seen.
Unit
Arrangement in chessboard type is made with 76 alignments and total length of 86 km. Main structure is rubber stone, road surface is paved by semi-penetrated broken stones. There are many road alignments were RC paved. The density of the main road is 5.12 km/krn2 with the total traffic area of 1 I Oha.
2004 1 2005 1 2006
25
1.3.7.4. Flooding situation at invested and upgraded alignments:
Table 1.10 Flooded areas relating to invested and designed alignments
25 25
Code
Phuc Trong channel (m2) , (m) (cm) (timeslyears) (hours)
Item
Bao Boi Lake
Embankment of Truyen 31000- 300 1 30-40 1 12-16 1 1.5-2 1 water towards the
1 / - Black water 89% I 1 I - Bad smell I 88% 1 I I 1 - Mucus I 20% I I
Source: Sfafisfic invesfigafion dafa of Cofley Cons~~lfant in 10/2007.
Environmental monitoring results
+ Monitoring locations of environmental elements is shown in Figure 1.6
- Itch
- Miscellenols
+ Results: Water environment monitoring data of upgraded alignment area is quite
sufficient (See Table 5 and 6 Appendix l), including pond water at culverts to the ponds and
on channels. In addition, after measurement, 05 points on dredged and upgraded areas was
supplemented on October 2007 (See Table 7- Appendix 1).
According to the above results, surface water of some ponds is polluted by organic
substances and microorganism. Therefore, it is necessary to take counter-measures to
minimize sources which may cause water pollution, especially wastes of residential areas.
Two big channels (T3 1 1 and Kenh Gia ones) are directly affected by activities of urban areas.
Monitoring results of water quality at these 02 channels show clearly the pollution degree of
surface water of urban ditches and drains.
-.
40%
5%
Figure 1.4. Value o f COD, BOD5, Nts,Pts (mg/m3), 2006 Notes: -
Fertilizer, garbages, oil film, insects
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- N4 . Kenh Giapump station before pumping into Duo river (20023'56"N; 106010'22E"). - N5: Drain of Quan Chuotpump station before discharging into Duo river (20°2625"N; 10@1232"~). - N6: Loc Ha Bridge footing (Phu Nghia road) (20~2624"~,.10dOl1'16"~). - N7: Drainage culvert in front of Hoa Co May Restaurant - Truyen Thong lake (20~25'45"~;106010'19"~). - N8: Drain of waste water for Hoa Xa industrial area - Commune No.3 - My Trong - My Xa 120024'34"N; 106009'13 "E)
I I
Figure 1.5. Nts,Pts (mgIm3) of waste water quality in 2007
@: - N9 : Nang Tinh lake (2Ofl24'.56"N; 106'10'18"E) - NIO : Bao Boi lake (20°25'31 "N; 106"09'41" E) - N l l : Nam Van dumpingyard (20°24'27" N; 106"10'31"E) - N12 : Phuc Trong channel (20i'25'40"N; 106'09'25"E) - N13 : Bai Bong lake (20°26'05"N; 106"10'44"E)
Analysis results (Table 6 - Appendix 1 & Table 7 - Appendix 1 ) shows that almost
analysed data is recognized to be higher than allowable level of Vietnamese standard (Column
B). Pollution of Kenh Gia is more serious than that of T311 channel. And pollution will be
prospectively increased with time at both these channel. In detail, BOD criteria in 2006
exceed by over 1 time and COD criteria in double.
Waste water quality of highly polluted channels in the City was monitored by 2 times in
2006. There are 14 criteria as pH, DO, BODS, COD, opaque, SS, total of N, total of P, Fe,
Coliform .... By collected data, it is realized that almost monitoring criteria for water
environment of Nam Dinh city exceed the allowable criteria of Vietnamese Standard TCVN
5945-2005 Column B, except pH, petroleum and some heavy metals. So water quality of
observed location was polluted by organic substances and microorganism.
Comments: compared with Vietnamese Standard on waste water quality, TCVN
5945:2005 (Column B)
pH value: pH is defined to be in allowable range of Standard at measured positions.
Suspended solid (SS): SS content exceeds the allowable level ( 1 00mgII). It is not much
difference on the quality, however, some places were polluted such as Hoa Xa industrial area,
Kenh Cia.
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Chemical oxidize demand (COD): COD exceeds allowable range by 1 or 3 times at
almost survey points.
Chemical oxidize demand (BODS): is similar to other criteria, BOD5 value at 05 di&m
survey points is also higher than the allowable level of the standard by 01 or 02 times. These
results revealed that water resource at drains is being mainly polluted by organic substances
and almost domestic water from households along these drains and channels is directly
discharged in here;
Coliform value: exceeds the standard by many times at all surveyed points (Coliform <
5 x 100 MPN/lOOml). Coliform value of Hoa Xa industrial area reaches highest level (double
than TCCP).
Heavy metals: concentration of surveyed metals is lower than allowable level of
Standard. Therefore, pollution due to metals is unremarkable at channels and drains of the
area. However, attention should be paid in the future because these metals was found in water
resources. This analysis results also agree with monitoring results for channel waste water
made by Nam Dinh environmental monitoring center during the past time in Nam Dinh city.
Other criteria: other pollution criteria like Ntc and Ptc is also high, especially Ntc
concentration is >10 mg/l at almost surveyed points. Although allowable concentration is not
regulated in surface water quality standard, it is revealed from the above results that water
sources at quatic bodies in project area have a rather big contain of nutrious matters.
In conclusion, water resources of channels and ponds in the project area are being
pol luted by organic substances and microorganism:
Waste water collection and treatment system of Nam Dinh City has not been
built, domestic water from households and shopping areas have a big contain of
organic substances which is directly discharged into receiving resources;
Residential consciousness is not so good: garbages and dead bodies of animals
was thrown into channels, endangering residential health;
Developlnent of industrial areas and new urban areas contributes to the increase
of organic substances in the area.
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Environmental Impact Assessment (EIA) April 2009
Figure 1.6: Locations of environmental monitoring in Nam Dinh city
- Existing Drainage Routes - Upgrading Routes My T a n Ccnnmm
</, :,~,$i -, 7 *, Upgrading Lakes
Sludge Samples
Water Samples
Alignment not to be upgraded if there is a lack of capital
Loc An Ward
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
1.3.8.2. Underground water environment
Underground water quality of Narn Dinh city was observed at 3 locations twice a year.
Monitoring criteria comprise the following parameters: pH, colour, hardness,, C1-, ~ 0 4 ~ - ,
N03-, Fe, COD and Coliform.
Monitoring results (Table 7 - Appendix 1) show that some values like Fe, Mn exceeding
the allowable level of standard (TCVN 5944-1995), parameters pH, Cu, As, S042-, Total
coliform, carbonate hardness in analysed samples have the concentration in tha allowable
range of Standard TCVN 5944-1995, pollution signs by NO3 - was seen at some locations (at
Mr. Hoang Trung Giap's house, the pollution exceeds the standard by 1.3 times). This
pollution should be paid attention as one criterion.
1.3.8.3. Existing a i r condition of the project area
Air pollution of Narn Dinh City in general and of the country in particular is mainly
caused by increasing traffic means. In addition, construction and shopping activities also have
certain affects on air environment. Current situations of air environment in the project are will
be assessed through getting opinions of local residents, environmental monitoring data set by
Narn Dinh Department of Resources and Environment in past time and monitoring results
made by Consultant and Narn Dinh Quality Measurement Bureau.
Results of quick assessment through investigation notes:
Table 1.12: Quick assessment on current situations of air environment in upgraded area
Source: Investigation data of Coffey Design Consultant in October 200 7
Measuring and monitoring results on air cnvironment
Measuring and monitoring results on air environment in Narn Dinh City was made by Narn
Dinh Department of Resources and Environment in 2006 and shown in Table 8 - Appendix TSP air
environment (TSP < 0.3 mglm3) in 2006 exceed Standard TCVN 5937:2005 at supervised locations of
Nam Dinh city. However, suspended dust is quite high in rush-hour or at main traffic points such as
Truong Chinh T-junction, Nang Tinh cross-sections and Narn Dinh bus station gate.
No.
1
2
3
4
5
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Type of pollution
Polluted air environment
Order
Dust
Noise
Miscellanenous
Rate of questioned households Remarks x
97 %
79%
58%
55%
6%
Mainly by ponds, culverts and drains
Mostly due to traffic
Due to traffic
Fly, mosquito and garbages
VIETNAM URBAN UPGRADING PROJECT - NAM DINH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Average concentration of SO2 per hour in air environment at monitored locations in
2006 is 0.1 1688mglm3 and be lower compared with Standard TCVN 5937:2005 (SO2 < 0.35
mglm3).
Average concentration of NO2 in 2006 is 0.06725mglm3 and be lower compared with
Vietnamese Standard. NO2 concentration at main traffic axles such as Truong Chinh T-
junction, Nang Tinh cross-road and Nam Dinh bus station gate is defined in allowable range
of Vietnamese Standard.
(CO) concentration in 2006 is 3.18mglm3 and be much lower than Standard (30mglm3).
CO value reaches highest level at dense population area like Truong Chinh -junction
(3.99mg/m3), reducing at Nang Tinh cross-road (3.95mg/m3), and reaches lowest level at
main culvert ofNam Dinh Textile Company (2.17 mg/m3).
Noise in years has a light increasing trend. Among measured locations, only Nam Dinh
bus station gate exceeds standard due to a quite big traffic volume of this alignment.
In order to have updated data on air environmental quality at project areas, study
groups carried out monitoring and analyzing air samples at some representative locations in
the project area. (Table 9-Appendix 1)
Figure 1.7. Dust contain at the proiect area in 2007
Notes : - K5: Mac Thi Bztoi and Hang Cap cross-roads (2Oo25'56,-/6"N; 106'1 0'42,06"E) - K6: Giai Phong Road (canlptrs ofBao Boi lake and Ph~rc Trong channe1)(2O025'3 7,76"N; 1 Os'O9'35,76"E) - K7: Nguyen Co Thach Road, near People's Committee ~ ~ C L I U Nam ward (20°24'55,68"N; 106"lO '45,72"E) - K8: In front o f Cua Truong market (201'25'1 4,46"N; 106"10'34,74"E) - K9: Tran Quang Khai - Nguyen Van Troi - Hoang Dieu cross-road (2Oo25'5,04"N; 106'10'14,34"E)
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If so, through additional air environmental monitoring in the project area (Table 9-
Appendix I), we will have a correct and updated vision on air environment and noise in the
area. Almost criteria of monitored locations meet standard, except Mac Thi Buoi Hang Cap
position with TSP a bit higher than standard (0.36 mglm3).
So, value of air environment at measured points is quite homogenous through
monitoring periods. It shows that the air in Nam Dinh city is only polluted at locations with
big traffic volume, dust and noise. Other elements like S02, Nox are not detected or be lower
than standard by many times. But in the future, air quality may get worse if construction
activities are continued.
1.3.8.4. Existing solid waste management
According to statistic data, the city's garbage quantity is estimated about 200ton/day, in
which Urban Environmental Company (URENCO) collected about 70% (145Tlday). The
company also has the duty of cleaning digestion tanks if required. With 351 staff, garbage
collection is manually implemented with dust-carts. This colnpany is equipped with 14
garbage trucks (including one truck of 2T, 4 trucks of 3T. 7 trucks of 4T and 2 trucks of 6T),
annual collection and transport capacity may reaches 53000T of garbage1 year.
Garbage truck Garbage transferring Station
on Phu Nghia Street
Collected garbage is gathered at some locations on road to wait garbage trucks to
transport to garbage storage yard of 3ha square area with 8+20 dumping sections in Loc Hoa
Communes. This garbage storage yard was put into use in 1994 and has 8 dumping sections.
Those sections have been filled up so far. Since August 2002, more 20 dumping section have
been newly built at garbage storage yard in Man field (Loc Hoa commune) to ensure the
sufficient capacity for 10 following years. Besides, the factory which produces microorganism
fertilizer from domqstic waste has a designed capacity of 250 tonlday. This factory is being
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VIETNAM URBAN UPGRADING PROJECT- NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
operated by preferential loan of French Government and counter-part fund taken from the
budget.
Activities of URENCO are basically funded by the City's budget (reach 80% of the total
cost) because applied garbage collection fee is 3,500 VNDhousehold per month and the fee is
only get from about 80% of households. In spite of that, service quality does not satisfy
requirements of residents due to improper collection and transport method. Gathering and
transport activities from collection system to transport system are not scientifically arranged
due to the lack of small inter-change stations. Besides, at present, URENCO lacked suitable
transport means because almost transport means get old, damaged and depreciated. Pollution
treatment works at garbage storage yards have many limitations. Residents living around
garbage storage yard have, for many times, prevented the entering of garbage transport
means, leading to garbage stuck situations in 5 - 7 day in the city.
(*Source: Nam Dinh Urban Environmental Company)
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental I m ~ a c t Assessment (EIA) April 2009
CHAPTER 2
ENVIRONMENTAL POLICIES AND
LEGISLATION
2.1. Environmental Management
At national level, environmental management in Vietnam is lead by the Ministry for Natural Resources and Environment (MONRE) with the following key tasks and functions:
Direct and supervise the implementation of environmental protection regulations, programs and projects as assigned by the government;
Establish and uniformly manage the national environmental monitoring system; summarize and process data from environmental monitoring and regularly assess the environment to forecast the environmental changes;
Appraise EA reports submitted for proposed projects; regulate environmental
standards and manage the licensing, standards and certification systems in accordance with current laws;
At provincial level, the Department of Natural Resources and Environment (DONRE) is legal body responsible for environmental regulation during project construction and operation. In addition, according to new regulation, to support DONRE, environmental management were
decentralized to district level or could be authorized to commune/ward level.
2.2. Environmental Laws and Standards related to the project
A summary of key national laws governing environmental management of concern to the
project include but are not limited to the following:
1 . Law on Environmental protection approved by the National Assembly of the Socialist Republic of Vietnam on 29th November 2005 and the Announcement order signed by the State President on 1 2Ih ~ecember 2005;
2. Decision No. 155/1999/QD-TTg dated 16Ih July 1999 of the Government Prime Minister promulgating Regulations on management of harmful waste;
3 . Decision No. 60/2002/QD-BKHChIMT dated 7'h August 2002 on promulgating technical guidance of dumping harmful waste;
4. Decree No. 80/2006/ND-CP dated 9th August 2006 of the Government regarding detail
regulation and guidance on implementation of some articles of the Law on Environmental Protection;
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5. Decree No. 81/2006/ND-CP dated 91h August 2006 of the Government regarding administrative penalty in the field of environmental protection;
6. Decree No. 59/2007/ND-CP dated 9th April 2007 of the Government regarding the management of solid waste;
7. Circular No. 12120061TT-BTNMT dated 26h December 2006 of Natural Resources & Environment Ministry guiding conditions for practicing, and procedures of setting up dossier, registration, professional practice licensing and management code of harmfbl waste;
8. Circular No. 0812006lTT-BTNMT dated 8th September 2006 of Natural Resources & Environment Ministry guiding the implementation of some contents on strategic environmental assessment, environmental impact assessment and environmental protection commitment;
9. Decision No. 2312006lQD-BTNMT dated 25' June 2002 of Ministry of Natural Resources & Environment on promulgating the list of harmful waste;
10. Decision No. 3512002lQD-BKHCNMT dated 251h June 2002 of Ministry of Science Technology & Environment announcing the list of Vietnamese mandatory standards on environment;
1 1 . Decision No. 2212006lQD-BTNMT dated 1 8th December 2006 of Ministry of Natural resources & Environment compelling the application of Vietnamese standards on environment;
12. Sectorial standards No. 22TCN 242-98 dated 23rd July 1998 of Ministry of Traffic and Transportation guiding the process of environmental impact assessment upon setting
up feasibility study project and construction designing of traffic and transport constructions:
13. Environmental Standards of the State of Vietnam for 1995 - 2005 period;
14. Based on the Consulting Service Contract signed on 27th February 2008 between the PMU on Investment & Construction of Nam Dinh city and Thang Long Infrastructure Development Joint Stock Company;
15. Decree No. 21/2008/ND-CP dated 281h February 2008 of the Government on amending and supplementing some articles of Decree No. 80/2006/ND-CP dated 9' August 2006 of the Government on promulgating in detail and guidance on the imple~nentation of some articles of the Law on Environmental Protection.
This EIA report is set out to satisfy Legal Codes and policies of Vietnamese Government. The EIA study is carried under regulations on environmental analysis
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
2.3. World Bank safeguard policies to be addressed in the EA
In addition to environmental review and approval procedures of the Government of Vietnam, the Narn Dinh PMU must be prepared and implemented in accordance with the World Bank's environmental and social safeguard policies. An EA for a Category A project examines the project's potential negative and positive environmental impacts, compares them with those of feasible alternatives (including the do nothing option) and recommends any measures needed to prevent, minimize, mitigate, or compensate for adverse impacts and improve environmental performance.
Based on a review of the sub-project area and proposed activities, application of the following World Bank environmental and social safeguard policies were assessed during the EA process:
Environmental Assessment - Operational Procedural/ Bank Procedure 4.01 (OPBP 4.01):
2.4. Related documents and reports
Statistical yearbook of Narn Dinh province in 2006 - Narn Dinh Statistic Bureau
i) F/S report; ii) Basic design of 27.1 Package and iii) Report on collection and analysis of environmental baseline data for the purpose of EIA preparation - Primary and secondary infrastructure, phase I1 - Vietnam Llrban Upgrading Project, Narn Dinh Urban Upgrading Sub-project - Narn Dinh City, 2008 - Consultant: Coffey Company.
EIA report - Sub-component "Investment and construction of pumping station of spillway channel and belt channel in northern basin of Narn Dinh city" Vietnam Urban Upgrading Project, Narn Dinh Urban Upgrading Sub-project - Narn Dinh City, 2004.
EIA report - phase 1, Urban Upgrading Project, Narn Dinh Urban Upgrading Sub-project - Narn Dinh City, May 2003.
Narn Dinh Department of Natural Resource and Environment, 2005. Report on current environmental situation of Narn Dinh province 2005.
Narn Dinh Ministry of Natural Resource and Environment, 2006. Report on environmental monitoring results in Nam Dinh city, stage 1 - 2006.
Narn Dinh Ministry of Natural Resource and Environment, 2006. Report on environmental monitoring results i n N a ~ n Dinh city, stage 2 - 2006.
Website of Nam Dinh province http://www.namdinh.gov.vn/.
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Environmental Impact Assessment is carried out in coordination with the following agencies:
1. Coffey Consultant Company;
2. Natural Resources & Environment Office of Narn Dinh city;
3. Statistic Office of Narn Dinh city;
4. Center of Environmental Analysis and Observation;
5. Bureau of standard and quality measurement;
6. Department of Science & Technology of Narn Dinh city;
7. Department of Natural Resources & Environment of Narn Dinh city;
8. Fresh water Company Limited (one member as the State) of Narn Dinh city;
9. Preventive Medical Center of Narn Dinh city;
10. Urban Construction Company Limited (one member as the State);
1 1. Urban Environment Company Limited (one member as the State);
12. People Committees, Fatherland Frontier Organizations of wards, communes, and local agencies located inside the projected area.
Environmental Impact Assessment reported was prepared Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong)
List of staff participating into preparing EIA report:
Ngo Huy Toan Environmental expert
Hoaang The Anh Environmental expert
Phan Thi Thu Ha Environmental expert
Nguyen Thi Ha Environmental expert
Nguyen Hoang Sam Environmental expert
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
CHAPTER 3 PROJECT COMPONENTS OF PHASE 2
3.1. Overview
The order of culvert alignments is designed in accordance with the priority order as stated i n the investment report.
The pipe culvert design option shown in the Consultant's design presentation cannot be selected because following the option the culvert will be placed at deep place. If so, it is not suitable with the flat and low terrain of Nam Dinh city. With limited working space and actual big traffic volume, many difficulties may be encountered during pipe culvert construction and installation.
Construction works in Phase 2 of Project comprises:
- Construction of primary and secondary drainage culvert alignments
- Construction of embankment and dredging for ponds, channels. ditches and temporary roads.
3.2. Works in basin No.1- Dien Bien - Dang Viet Chau - Kenh Phuc Trong
- Main Dien Bien culvert axle comprises 2 box culvert alignments placed at two road sides to collect water from the road ends of Giai Phong and Dang Viet Chau Roads, discharging into An Trach and Bao Boi Lakes (2 regulated ponds), then discharge into Phuc Trong and Gia channels.
Phuc Trong channel: 850m long, 2 channel banks with management line of 2m width on the right side connecting to Kenh Gia channel.
The system helps connect drainage pipes of low-income residential areas No.7, 8, 9 & 18 and reduce flooding situation at Quang Trung area.
3.3. Works in basin No.2: Hang Thao - Ma Dien Channel
- Main drainage system: starting from Phan Dinh Phung - Hang Cau T-junction, culvert runs along Hang Thao, Huynh Thuc Khang, May Chai, Cua Truong, To Hieu returning to Hang Thao, then to Nguyen Van Troi .with culvert bottom elevation of 0.48 into Ma Dien channel the culvert is placed under the road.
- There are 3 main drainage lines:
+) 2 lines discharge into Hang Thao muin culvert axle.
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
- Ha Huy Tap line: starting from Cot Co of 235m, existing Hang Thao box culvert
- To Hieu line: starting from To Hieu crossing May To of 75m long, box culvert is placed under the road, merging into the main Hang Thao culvert
+) 1 main drainage pipe: Van Cao into culvert of Nang Tinh Market alley starting from the ending Nguyen Hien through Tran Phu, running along Van Cao through Phan Boi Chau - Tran Huy Hieu T-junction, continuously to one section of Phan Dinh Giot, connecting to existing culvert B1200 in Nang Tinh Market alley
- Drainage system for low-income residential areas No.3, 4, 5, 8, 9, 15 & 16 helps to reduce flooding situation in Hang Cau, Phan Dinh Phung, Hang Thao, May Chai, Cua Truong, To Hieu, Ha Huy Tap and Van Cao.
3.4. Works in basin No.3: Hung Vuong - Nguyen Duc Thuan
Basin square area: 60.1 ha
Main drainage system:
+ Section I: make culvert for 200m of existing ditch at the end of Hung Vuong Road, crossing Truong Chinh Road.
+ Section 2: at the end of Nguyen Duc Thuan Road connecting to T3-11 channel. The culvert is placed on sidewalks, each side is 1 10m long, at the place where it is merged into T3-1 1 channel,
Whole Hung Vuong - Nguyen Duc Thuan culvert alignment is 310m long connecting drainage system of low-income residential area No. 1 1.
3.5. Works in basin No.4: Nguyen Trai - Mac 'Thi Buoi - Muong An Phong
Main drainage system:
+ Nguyen Trai - Mac Thi Buoi - Muong An Phong Culvert, starting from Phan Dinh Phung, Nguyen Trai intersection, the culvert runs along Nguyen Trai Road, following Tran Te Xuong, Mac Thi Buoi through Truong Chinh, meeting An Phong channel in the front of 145 m long (culvertized), then runs along An Phong backside channel ) of 280m (culvertized) according to planning, it will merge into culvert Dl200 of planned road of 52 m wide running through this place. then merging into T3- I l channel.
Whole culvert alignment is box culvert, tinally is double culvert with one culvert section placed under sidewalks and the other placed under the road.
+ Ho Truyen Thong - T3-1 I culvert: the whole alignment is box culvert (445rn long and be culvertized for existing ditch, at the discharging location into T3-11 channel,
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VIETNAM URBAN IJPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PRO.IECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
+ Whole drainage system connects drainage pipes of low-income residential areas No. 10, 14, 15, 17, 20 & 22 and helps to reduce flooding situation at Nguyen T3- 1 1 Trai, Phan Dinh Phung, Tran Te Xuong, Nguyen Thi Minh Khai and Hang Cau areas.
3.6. Works in basin No. 6: Nguyen Co Thach
Main drainage system: build 2 box culverts on sidewalks of 280m, collect water from 2 sides of Nguyen Co Thach to the place which is 255m far away from the dyke road. Then following 25m of drainage culvert D600 discharging into existing ditch
Nguyen Co Thach culvert alignment is located on the left bank in the south of Dao River to ensure drainage for the new area without culvert.
3.7. Works in basin No.7: Nguyen Trai Road
Main drainage system:
At the section towards Voi Gach market alley, build reinforced concrete box culvert for discharging into existing culvert.
The section from Giai Phong Road to Kenh Gia channel: running along Giai Phong Road, entering Nguyen Trai Road, expanding to alley No.19, running out to Kenh Gia channel, is box culvert of 800m long and placed under the road
Drainage system connects drainage pipes of low-income residential areas No. 6, 19 and reduce flooding situation for the area near mechanical factory.
3.8. Works in basin No. 9: Road toward My Xa
Main drainage system: Starting from Tran Huy Lieu T-junction crossing the road to My Xa, culvert alignment run along one section of Tran Huy Lieu, then run along the road to My Xa, finally entering Kenh Gia channel.
The whole alignment is 1065m long, box placed under the road. At the entrance of Kenh Gia channel, Drainage system connects drainage pipes of low-income residential areas No. 1 and reduce flooding situation at Tran Huy Lieu road ending.
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
3.9. Works in basin No. 10 : Lien Ha
Main drainage system: starting from Thai Binh road, running along Lien Ha ditch and be reinforced concrete The whole alignment is 925m long.
Drainage system connects drainage pipes of low-income residential areas No. 13
3.10. Embankment of regulated pond
Target and main work of embankment
Fish water fern and garbage, dredge the lake to make clean for the environment and create good aesthetic for water surface in the area.
Excavate the lake bed, increase the water capacity of the lake, especially when the water level of the lake should be low. It is required to establish minimum water level of the
lake. Currently, it is essentially to make land released for material storage for embankment construction.
Build embankment wall around the lake, which is retaining wall made of masonry stone and cement mortar M75 to protect the lake slope from erosion, occupation or
encroaching and scattering garbage.
Make a path next to the embankment of 3m width, road pavement structure is N1 type, make lake management path, against lake occupation, make temporary road, make walking path, make better appearance for the area.
Next to the road towards residential houses, build box culvert alignment to collect domestic water of households, each alignment with sufficient length will have culverts to
discharge water into the lake. On box culvert surface have reinforced concrete cover with holes to collect run-off water from the road and its vicinity.
Culvertize opened drainage ditches of the lake. Currently, build construction road for embankment construction, then use it as temporary road.
Design criteria for embankments and lakes: regarding the road next to the lake, efforts should be made to minimum land acquisition works. In order to do so, almost part of designed embankment should be shifted towards the lake and be approximately 1-3m far away from lake edge.
3.11. Embankment of Bao Boi lake
Bao Boi lake is 1.73ha wide, belong to sub-basin No. 1, its function is to regulate.
Design of lake embankment:
+ The length of the embankment around the lake is 773m. the road next to the embankment is 31n wide with box culvert covered
+ Retaining wall typed embankment have square trapezium section, made of masonry stone and cement concrete M75,
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VIETNAM URBAN UPGRADING PROJECT - NAM DTNH LIRBAN LIPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
+Embankment next to the lake is 3m wide, (including adjacent box culvert), road
pavement structure is type N 1 .
+ Box culvert next to road built with solid brick M75, culvert surface is covered by reinforced concrete gutter with holes to collect run-off water, at manhole position, culvert D400 is placed to make drainage into the lake.
Temporary road of lake:
+ Road on culvertized open ditch from culvert back side through the railway to Bao Boi lake, culvert of 60m length, carriage-way of 5m width, structure of N type.
+ Road on culvertized open ditch from Bao Boi lake to Phuc Trong channel, of 95m length, carriage-way of 5m width, structure of N type
3.12. Embankment of Nang Tinh Lake
Nang Tinh lake has square area of 4.7ha belonging to sub-basin No. 2, its function is to regulate the common drainage system, the basin which give direct regulation is sub-basin No. 2 before discharging into Kenh Gia.
Status of the lake
According to survey documents, lake bottom elevation is normally from 0.17m to 0.4m, closely to lake edge from 0.4 to 0.8
Ground elevation next to lake is normally from 1.7m to 2 .2~1.
Design of embankment:
The length is 1046m. with the road next to embankment of 3m width, there is box culvert with cover with stairs are built with distance of 150 + 200m) next to the road.
Embankment is retaining wall type with square trapezium section, be built by masonry stone and cement mortar M75.
Management road around the lake, culvert besides the road, stairs of lake is designed as same as that of Bao Boi lake.
Temporary road of the lake:
Road besides Dong Bac ditch entering the lake is 152.68m long, road pavement is
5.5m wide with structure type N.
The road running through collective zone next to petrol and fuel dump is 128.54m long, the road is 4m wode, structure is type N .
The road from Nguyen Van Troi (at the crossing position with Ma Dien ditch) running towards the lake is 76.85m long, road cross-section is 4m wide, road pavement structure is type N.
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Truyen Thong lake has square area of 14.4 ha, belonging to sub-basin No.3, together with Hang Nan lake to maily regulate drainage for culvert system along Truong Chinh road and Tran Hung Dao, and together with the culvert system to connect An Trach and Bao Boi lakes and regulate partly drainage for 2 main basins in the north and the south of Nam Dinh City.
Status of Truyen Thong lake embankment
The lake was embanked many years ago. There are only remaining 2 sections (one section in the northwest is 421m long and the other section in the southwest is 164m long) should be embanked.
Design of lake embankment:
Section in the northwest which is 4 14m long is one part of embankment of island in park planning at this area, firstly build embankment wall without maangement road and culvert next to the road to collect water.
Embankment wall of the lake is retaining wall typed with square trapezium section and made of masonry stone and cement mortar M75, Designed elevation of lake bottom is O.Om, water level of the lake is I .Om in average, the highest level is 1.5m as recorded.
Section in the southwest is 164m long, with the road next to the lake is 3m wide, there is a box culvert with cover of 0.4m width next to the road and 1 stair position to the lake.
Embankment wall is designed as those of Tay Bac sectionRoad next to the lake, box culvert next to the road and stair to the lake are designed as same as design of Bao Boi and Nang Tinh lakes.
3.14. Summary of invested components Table 3.1: Invested designing items
I C I Canal. I I 1
Code
pp:L Bao Boi Lake,
Item
Phuc Trong canal,
1 Lake Degdging 1 14,670 1 m3 1
TY pe
canal degdging
Embankment
Scale
Bao Boi Lake, entrance path:
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10,080
900
Lake, box culvert dimensions 1 -2.00x2.00m Section conneting to Phuc Trong channel, box culvert
m3 1 m 1
773 m
60
9 5
m
m
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
Nguon: Coffey- Weli Consultarzt
L3
D Dl
Dl .1
Dl .2
D2
D2.8
0 3
D4
D5
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0 6 Nguyen Co Thach Box Cluvert both side 350 m
D 7 Tran Dung Ninlr Box Cluvert
0 8 Lien Ha 1 Box Cluvert 925 m
0 9 MyXa Box Cluvert 1035 m
Dl0 Dien Bien Box Cluvert 1090 m
Truyen Thong lake
Sewer line HangThao
Ha Huy Tap line
Van Cao line
Mac Thi Buoi Phan Dinh Phung - Mac Thi Buoi Han Thuyen -Vi Hoang line
Hung Vung Connection Truyen lake and Cia canal
Thong
To Nguyen Trai sclrool
Embankment
Embankment of West North side Embankment of West South
Box Cluvert
Box Cluvert
Box Cluvert
BOX ~ luver t
Box Cluvert
1046
421
164
355
215
2410
2065
345
200
450
1100
m
m
rn
15 75m
m
rn m
m
m
m
m
m
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
CHAPTER 4
ENVIRONMENTAL IMPACTS ASSESSMENT Based on the experience in the Phase I of the Nam Dinh Urban Upgrading Project as well as similar projects which are completed and local consultations, the sub-project is expected to have significant positive benefits for the environment, especially significant reduce flooding area and flooding frequency in the city center,
From an assessment of proposed Phase 1 sub-project components, baseline conditions and consultations, supported by the experienced gained from similar types of World Bank-funded projects in Vietnam, the following key sources of potentially adverse environmental impacts were identified and are recommended for detailed management, mitigation and monitoring measures:
During construction process (land clearance):
- Increased dust levels due to earth work excavation and construction activities
- Social impact due to resettlement
Impacts on the construction phase
- Impact of the construction work;
- Street Excavations and material transportation
- Impact of Embankment construction of canal, lakes
- Transport and disposal of dredged sediment from canal, lakes
Impacts on the operation phase
- Wastewater management and drainage operation
4.1. Impacts during pre-construction phase
This course of preparation works shall produce solid waste due to the demolishment of constructions being cleared. Solid waste (comprising those produced by demolishment of houses, soil, rocks, mud, and redundant or scattering material, and garbage) produced during the course of carrying out the construction
- Air environment: major waste which may cause pollution to the air condition in respect of the Project ilnplementation comprise: dust, hazardous exhaust (C02, S02, N02). However, level of impacts during this course is in signiticant. Operations in this course, which produce exhaust and dust, and can pollute the air environment, comprise demolishing works of construction being site clearance and means of carrying such waste.
- Water environment: can be impacted due to the disassembling and moving works of houses, which is washed by rainy water. However, major polluted component is washed soil
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VIETNAM IJRBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
and dust, and a few of chemical substances. The impacted subjects are ponds, rice fields being located near the displacing residential houses.
- Residents living around the construction site and along transportation roads.
Site clearance works: For a newly made construction, site clearance work is a complicated issue. It causes mental disorder situation for those who are appropriated of land. Meantime. the disassembling and moving works for construction and re-buiId such moving construction shall give impact on the physical environment as creating dust and noisy pollution, and even to water source. Regarding the quantity of site clearance: there are over 6 households being entirely impacted by the Project, to which they are losing about 473m2 of land, and 52 households bearing temporary impact of business operations.
Because there are not so many households which are fully affected (6 households), and mostly households are affected on business activities. According to the survey, demolishment of houses which are mainly 1-2 floor and semi-permanent houses will be implemented in 3-4 days at maximum, dust impacts due to house demolishment in sun days or affects of surface water due to the rain in rainy days are not big and only occur in short time. However, contractor must also has proper dismantlement method, covering method and covering plan for adjacent houses (next to dismantled houses), and special attention should be paid to quick transport of solid waste from demolishmentt area, transport right after demolishment so as not to avoid long-time staying of discarded materiaIs which may cause unhygienic situation and affects traveling of residents and traffic means or affects Iandscape in the area.
4.2. Impact in the Construction Phase
4.2.1. Impact of primary and secondary Main Drainage Construction
Table 4.1 : Summary of Potential environmental impacts of Primary and Secondary Main Dminage I I I
Activities Impacts
1 Constructing I
Preparation Phase related primary
and secondary
I 1 Construction Phase:
- Increased dust levels due to earth work excavation for resettlement I
drainage sewers
- Increased dust levels and air emission due to earth work excavation and construction activities I
-Social impact due to resettlement
- Stagnation of wastewater due to blocking oF sewers I I
- Temporary disruption of drainage system
- Increased noisc and air emission from transportation vehicles and construction equipment
I flood during rains
i I - Temporary storage of. materials and excavated soil causing obstacle to public and traffic I
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Activities Impacts
I
I Operation Phase
I - Temporary disturbance to small businesses
I
I - Risk of accidents
- Impact to air quality and water resources at the Hong river I
4.2.1.1. Increased dust levels due to earth work excavation and construction activities
- Odor during sludge dredging
Regarding the construction of I0 sewer lines in Nam Dinh city, tentative sources which may impact to the environment comprise 10,265 m of culvert lines and 70,549 m3 excavated soil. Most of digging material is planed to be soil and sand, and it shall be directly recycled at construction sites for re-filling diging ditches or moved away for discharging.
Construction of culvert lines coming along with streets is scheduled from 1 to 2 weeks. During this course, if the digging work is carried out in dry season as recommended, and the transportation is not properly managed, then digging materials shall be piled up along the dig ditches, and it causes dusty situation. In case where digging work of roads is carried out in rainy season as from November to January, it shall be impacted by other factors as the increasing of flooding situation, and eroded soil shall run into culvert lines or scattering over nearby streets, and dirty stagnant water shall overflow into dig ditches
Table 4.2 Amount of soil to be excavated
I I I Hang Thao-Ma Dien I 2145 1 16,239 I Sewer Line
I 2 1 Mac Thi Buoi I 2410 I 2 1,239 I 1 3 / Hung Vuong
Length (m)
Connection Truyen Thong Lake and T3- 450
1,800 1 l canal
Volume (m3)
1 5 1 Along route to Nguyen Trai School 1 1 100 1 8,778 I I 6 I Nguyen Co Thach
I 7 I Tran Dang Ninh I 450 I 2,070 I
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8
9
Lien Ha 1
My Xa
925
1035
2,202
6,469
VIETNAM IJRBAN UPGRADING PROJECT- NAM DlNH lJRBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
I 1 10 ( Dien Bien 1 1090 I 6,899 I Source: Feasible study of Coffey, 2007.
Major discharging source is the operation of trucks carrying material from production to gathering site. It also comes from the operation of digging machines, excavators, rolling machines of 6 - 8 tons and from 10 - 12 tons, ... Exhaust generated by construction equipment and process of fuel fire as gasoline, diesel.
Carrying means shall produce dust and air pollution at construction works along streets, which are in the process of replacing and installing drainage and sewer lines. These carrying means shall transport redundant sold out of construction site and material and equipment into the site (culverts, cements, sand, and rock,...). Total soil to be digged up for installation of culvert lines is about 70,549 m3. A part of these digged soils shall be re-filling with black sand, and the remaining shall be carried out of the construction site. It is estimated that there are about 14,100 times of moving out by trucks (each truck shall be loaded with 5 tons). According to the construction schedule of about 3 years, the number of trucks shall be increased about 2-3 tripslday over 10 km of road. The trunk traffic could be increased by some specific time of construction, however, by the experience in the Phase 1 and the construction component, the traffic will not exceed 25 tripslday.
Amount of fuel to be used is estimated by taking the average operational space of about I0 km, to which each carrying truck shall consumed about 0.0025 tons to 0.003 tons of diesel. Total amount of diesel to be used shall be 42.3 tons.
Currently, there has no specification standards over the pollution source produced by carrying truck. Therefore, the method from World Health Organization (WHO) is applied to calculate pollution load caused by the transportation of construction material and waste. See table 4.3.
Table 4.3. Loading of air pollutants due to transportation of vehicle
I Dust I 4.3 I 181.89 I a i r pollutants Coefficient pollutant used / ton FO (kgk)
NOx
Pollution load is fairly low if time schedule for each construction packet is not at the
Loading
(ks)
CO
VOC
same time. and such impacts are defined as in short term and being limited to reality schedule
5 5
of every small construction.
2326.5
28
2.6
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1 184.4
109.98
VIETNAM IJRBAN UPGRADING PROJECT - NAM DINH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Beside the pollution produced by consuming fossil hel, the transportation of solid, rock, construction material shall contribute to the increasing of dust in the air. The dust diffusion can be easily controlled and minimized by a reasonable separation of transportation lines and regularly water over the construction sites as well as covering and clearly washing once going in and out the site
However, these impacts are of locally making within the construction area, and transportation routes lasting from storage to construction site
Major subjects bearing the impact are residential communities living near the construction site, and people traveling on streets, especially for those who regularly appear at crowded markets as Cua Truong market, Nang Tinh market, Hoang Ngan market, Dien Hong market, and school area as the road running to Nguyen Trai street, and other main street as Dien Bien going to Ha Noi.
General assessment: Dusty pollution caused by the construction shall be of significant impact on drying days if no reasonable mitigation solutions are taken. Hazardous exhaust caused by pollution source as construction machines, carrying trucks are all assessed of locally impact but not prolong.
4.2.1.2. Noise and Vibration of Transport Vehicles and other Construction Equipment.
A large number of construction is reason for vibration and noisy, which is impacting to the infrastructures and residential area around the construction site. Works and operations of machines to cause such impacts are as follows:
- Machinery, construction equipment, transportation means working at site;
- Rolling and rammer machines;
- Soil digging by heavy equipment such as excavators;
. Vibration impact of driving works of concrete and sandy stakes, which rnain1y.i~ .-
positions of bridge construction and street on weak foundation.
Noisy impact caused by construction machinery shall mainly be detonating sound of construction equipment. Noisy and vibration impacts shall be of local making and appears in a short term (as many equipment and machines work at the same time).
The predicted noise levels one (1) m from the point source of noise is presented in Table I - 6.4 with the predicted attenuated noise levels with distance from noise 3 ( sources based on the following formula (Pham Ngoc Dang, 1997):Noisy level produced by construction equipment is estimated at table as below:
L, (X) = L,, (Xo) +20 log," (XolX)
L,(X,): noise from 01 with the source (dBA)
X , = I m
L,(X): the noise at the location that needs to be calculated
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Table 4.4. Predicted Noise Levels from Construction Vehicles and Equipment I I I I I ( Type of Vehicle Noise Level - 1 m from Source I Predicted Noise 1 Predicted I
1 National standard (TCVN 5949-1998): 50 - 75 dBA (between 6 AM - 6 PM) for residential areas 1
72.0
72.0 - 84.0
1 National standard for working environment issued by Ministry of Health: 85 dBA (8 hour work day) 1 During construction, the noise sources will be about 10 - 20 m away from residential
areas. According to the existing baseline monitoring data (Annex A), current noise levels along the city streets is around 65 - 75 dBA.
93
74.0
78.0
Compared to baseline conditions, the noise generated by project construction vehicles and equipment will be higher than existing transportation noise. However, the predicted noise levels 10 - 20 m from the construction sources are reduced. The noise also could be higher due to some noise sources operate at the same time and together with the transport vehicles (from 82 to 94 dB). In some cases, the noise could be higher than the national standards at a distance of 10 m from the noise sources. It is predicted that some residences and businesses along narrow streets could be affected by the noise during the construction period which is expected to last not so long time for each street section and the noise management
4.2.1.3. Water environment impact
During construction process, impacts are mainly realized on water environment while underground water is hardly affected:
7 3
54
5 8
Underground water: Construction activities may cause underground water pollution are those relating to ditch excavation, pipe installation and canal and pond dredging. In fact, water must be pumped out of ditches, canals and ponds before concreting. Excavation of pit is 2-3m in average from ground surface. 'Therefore, affects on the underground water environment is considered unremarkable during construction period. - Run-off water: Run-off water is mainly polluted by the following sources: rain water washing with soil (makes high content of suspended substances); waste water of workers make total sewage volu~ne surrounding the site (increasing concentration of SS, BOD, COD,
67.0
45.0
52.0
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase II Enironmental Impact Assessment (EIA) April 2009
coliform); waste lubricant and lubricating oil of engines may be also run-off water pollution source. Run-off water run into culvert alignments surrounding construction area then, water will be discharged into ditches, canals and rivers. In some cases, water can be stagnant at ponds, lakes, ricefields and hollow areas Detailed impacts are shown as below:
a) Rain water running with soil: Soilldebris which is not transported out of the site or scattered during transport process may be swept away in rain, making content of depositlsediment increased in water.
- It is shown from experiences that this scattered soil occupies about 0.4 % of excavated soil (each vehicle transports 5m3 in average and 0.02 m3 scattered). The total excavation quantity of the project is about 70,549 m3. Thus, the soil which dissolves in water is about 282 m3. (about 762 ton)
- The project will last 3 years with the average annual rainfa11 volume of 1,405 mm on the whole urban area of 852ha. And 282 rn3 (762 ton) of scattered soil will dissolve in 35,91 1,800m3 of rain water. The total content of sediment which dissolves in water is 2 1.2mgll in average.
- About 70% of soil (200m3) in transport process will be accumulated at manholes, culvert bottom. canals and ponds. Therefore, content of suspended sediment in water will be increased about 6.4mgll.
Table 4.5. Increasing rate of suspended solid waste when soil is swept away by rain water
Thus, impacts by swept soil does not make suspended solid substances of run-off water exceeds the allowed limitation. The problem is that sediment (about 200m3) narrows the drainage flow of the culvert near construction area. In order to solve this problem, about 50 vehicles for culvert dredging shall be mobilized for the whole project.
If Contractor's site management is good with strong efforts and participation of PMU, CMC and local residents), excavated soil will be regularly transport out of the site. Transport veh'icles which are covered by canvas will remarkably help reduce scattered soil.
Pollutant
SS
Affects by waste water of workers: In fact, for pro-jects which are executed in urban areas, almost workers are occasional ones, labors living in the city or in adjacent areas. These workers will come home from work, so waste water of workers at site are very little and mainly come from washing.
Baseline quality (pond
water)
21- 64
Unit
mg/l
Generally, waste water of workers living in the city was included in the waste water of the city. The waste water volume increases by workers who come from suburban areas and
Thang L o n g Infrastructure Development Joint Stock Company (Infra-ThangLong) 75
Increasing by construction
6.4
Water quality under impacts
27.4 - 70.4
TCVN 5942-1995 (column B)
80
VLETNAM URBAN UPGRADING PROJECT - NAM DINH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
participate in project construction activities. The estimated quantity of these workers is about 50 persons. This figure is unremarkable if compared with 240,000 persons in Nam Dinh city (0.02%). Accordingly, pollution quantity and rate of worker activities for the whole city is unremarkable.
However, if management of this waste water source is not implemented well, especially disorder mess, unhygienic risks and negative impacts on the environment may occur. These impacts will occur in short time (always in about 2-3 months for construction on 1 alignment). Domestic waste water mainly contains dregslsediments, suspended substances (SS), organic compound (BODICOD), nutritive substances (N, P) and microorganism. According to statistical data, quantity of pulluted substances which are released from each person to the environment (if untreated) is shown in Table 4.6:
Table 4.6 Quantity loading of polluted substances in civil waste water
Polluted substances Quantity
(g/person/day) Remarkable
Thus, quantity loading of polluted substances in civil waste water per one construction unit (for example, for 50 workerslpackages) when executing each package of the project will be (table 4.7).
b) Lubricating oil of engines: Risk of this impact may theoretically happen. However, following actual situation. there is event that waste lubricant and lubricating oil is bought for salvage or used as lubricant for production bases of tiled bricks and flower pots, etc. Therefore, these risks will hardly occurs if site management is strict.
TCXDVN 81 -2008
Refer TC WHO and American Environmental Protection
Bureau
BOD5 of deposited waste ' 30 -35
c) Stagnant and overflowed water: Other kind of water pollution which affects residents and little be recognized is congested and overflowed water. During construction process, the Contractor always to stop flow of adjacent culvert alignments to prevent water from entering excavation pits. This will causes stagnancy and overflow, affecting surrounding households if the Co~~tractor does not have suitable construction method.
Nitro of amonia salt (N -NH4)
Phosphate
COD
Total coliform
These impacts are only locally and temporally realized. The Contractor can overcome these impacts by putting a pump before of flow prevention point and using a temporary pipe for pumping waste water into other culvert pipes which are not prevented. Simultaneously, regularly clean and clear manholes surrounding the site. In case of forecasted heavy rain, the Contractor pumps all water out and dismantles tlow stop points to limit these impacts.
8
3.3
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VIETNAM IJRBAN UPGRADING PROJCCT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
4.2.1.4. Solid waste
Solid waste from activities of workers: According to statistical data, each urban resident
eliminate out to the environment about 0.5 - 0.75kg of rubbish per day. However, as
mentioned above (item 4.2.1.3), almost workers are occational ones, labours living in the city
or in adjacent areas. These workers will come home from work, so rubbish of each worker at
site is only about 50% of the above volume (about 0.25 - 0.4 kg of rubbish/person/day).
Accordingly, for 50 worker/lpackage x 5 packages, solid waste will be 62.5-lOC)kg/day
In fact, impacts of solid waste are also caused by awareness of residents and site management.
In case, the site is not in neat order and rubbish carts do not enter to collect rubbish, residents
always throw rubbish just at places near the site. At untidy sites, it is more difficult to collect
and remove this rubbish than at other places. The Contractor can reduce this impacts by strict
management activities like rubbish collection, setting signs of rubbish dumping prohibition,
using isolated fence, arrange guardsmen, etc
4.2.1.5. Leakage of Residual Grease and Oil
During construction, grease and oil residuals may be generated from maintaining and repairing vehicle and machinery. According to technical documents, the average oil residual
from construction machinery is around 7 liters per change of oil and the period of changing is every 3 - 6 months. If the estimated number of construction vehicles and related machinery is 30 units. the oil residuals that would be generated is around 30 -70 liters / month. The grease
and oil wastes are recognized as a hazardous waste (code: A3020, Basel: Y8). However, as mentioned above (item 4.2.1.3), following actual situation, there is event that waste lubricant
and lubricating oil is bought for salvage or used as lubricant for production bases of tiled bricks and flower pots, etc.
If strict management measures for collection and disposal of residual oils are not applied, such
residual wastes can be a potential source for soil and ground water pollution at construction
site. On the contrary, these impacts will hardly happen if site management is trict.
4.2.1.6. Impact to Traffic
Stockpiles of excavated soil and materials along the street excavation sites can cause temporary disruption of normal traffic flows and create public safety issues. Based on the above calculations, and the experience in the Phase I of the project (Van Mieu Ward), the amount of excavated soil can be a maximum of around of 3 - 4 m3/ m of road (in cases where main drains are being upgraded). If the height of soil stockpiles is about 1.5 m, the wide of
road is 20 m, the temporary soil stockpile will occupy about I0 - 1 5 % of the roadway. For narrower streets, the percentage of roadway that may be temporarily blocked by soil stockpiles would increase proportionately. Most traffic using the project streets consists of motorcycles and bicycles, which can Inore easily adjust flow patterns. Proper traffic management and public safety measures are required to minimize these temporary traffic
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VIETNAM URBAN UPGRADING PROJECT - NAbI DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
impacts and possible disruptions. It is a great problem if the the construction taking place in the crowded area such as route to Nguyen Trai School, markets (Nang Tinh, Hoang
Ngan.Dien Hong, My Xa). Most of the traffic vehicles in these areas are bycle and motobyke, and easy for adjusting the traffic around the material bunk and construction site. It is needed
to apply the safiy traffic managemnent to minimize the temporary impact to traffic on the site
4.2.1.7. Loss of income and unemployment situation
Impacts shall be in temporary and long-term on business establishments, and trading activities, especially for those at Nang Tinh market comprising 3 small private business households and 38 others to be stopped conducting their business during the construction due
to the culvert lines shall run through the existing market.
Besides, the construction shall make impacts on the employment and works of households residing along streets, especially for those of high economic values at the city's center. Such households shall be temporarily impacted due to dusty situation produced by the
construction.
It is needed to mitigation measures as to discuss with the local authority to set up the
temporary market and speed up the construction process and apply the suitable construction method for these area.
4.2.2. Impact of embankment construction, dredging, transporting and disposal of
Sediment from Canal and Lakes
Table : 4.8 Summary of Potential environmental impacts of embankment, dredging, transportting and disposal of Sediment from canal and lakes
1 lining the Bao Boi, Nang Tinh, Truyen Thong 1 - Increased dust due to movement of 1
Activities Embankment of both side of Phuc Trong canal,
/ lake I transportation vehicles and construction 1
Impacts
equipment - Increased noise and air emission from
I I transportation vehicles and construction 1 equipment1 - Increasing soil pollutes and muddy channel and 1
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 78
pond water - Leakage of residual oil and grease
- Risk of lands1 ide Dredging, transporting and disposal of sediment from Phuc Trong canal, Bao Boi, Nang Tinh, lake Vollulne of sediment 70.470 m3
Dredging Increasing turbidity and pollutant dispersion - Odor during sludge dredging - Muddy water source to be available in channel, pond - Leakage of residual oil Landscape affection .(Bai Dinh Temple at Truyen Thong lake)
VlETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SIJB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
4.2.2.1. Impact of embankment of canal and lakes
Activities
Table : 4.9 Leneth of embankment:
Impacts Transportation Leakage of sediment on transportation - Increased traffic flow by 25 truck/day on the route from Tran Hung Dao - Do Quan- Narn Van - Increase dust level Disposal of dredged material Dreded material will be disposed at the Nam Van landfill
E3
Code
C 1
L1
1 I 1 Embankment of West South 1 164 m I
Nang Tinh lake
Truyen Thong lake
Because construction site will be near residential area, affected objects during construction
period will be adjacent households and factories, etc.
Phuc Trong canal
Bao Boi lake
Increased dust due to movement of transportation vehicles and construction equipment
Length Item
embankment
Embankment of West North part
A large amount of arising dust shall impact directly the workers because of their frequent
contact with high dust concentration air and shall bring inconveniences to daily living of habitants in construction area. The most seriously affected subjects are the people who live near the construction site, especially in dry season. However, if the construction work is divided (one or two weeks for a construction section), this impact shall happen in a short time and confined scale. Actually, spraying water frequently on construction area is a necessary measure to reduce dust pollution.
TY pe
Both bank
embankment
1046 m
421 m
Noise and vibration of transportation vehicles and other construction equipment Noise and vibration will be generated from big construction equipment (bulldozer, concrete mixer,
truck...). It is also caused by demolishing underground works. High noise level would affect directly health of workers that are operating equipment or working at the site as well as people living within 10m around the site. People living farther than IOm would be less affected. The impacts of noise and vibration woilld be higher in case many equipment operate concurrently.
900 m
773 m
Pile driving for strengthening embankment foundation would generate high vibration level. As most of the existing houses along the river are of grade 4, the impacts of vibration in long time on their structures would be significant if necessary measures are not applied.
-
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental l m ~ a c t Assessment (EIA) April 2009
Run-off water: Run-off water would be generated from rain water at construction areas and sewer trenches, from wastewater overflow due to drainage interruption, in process of water spraying or vehicle cleaning. It has high content of suspended solid and turbidity because of soil during construction, of which the most considerable pollution source is rain water overflow. Volume of run-off water depends on rain intensity, raining duration and open construction area.
Domestic wastes generated during construction: Domestic wastes which are generated during construction process include wastewater and solid waste by workers at the site. The impact is not significant.
Leakage of residual oil and grease: In construction process, residual oil shall be generated from preparation or equipment maintenance process. According to technical document, the average amount of grease to be changed from each construction machine is some 71 at each change, which needs to be done every 3-6 months. If the quantity of vehicles and other machinery is 20, the volume of arising residual oil and grease will be some 140l/month. Definable residual oil and grease may be harmful waste (code: A3020, Basel: Y8). Impact of residual oil and grease will happen in case of leakage in store, overflow water together with oil from construction equipment. If there are no strict methods to control their collection and removal, whenever they permeate through the soil or get into the Phuc Trong canal, and lakes the water and ground environment will be polluted.
Impacts to local traffic
It is anticipated that the increasing volume of vehicles due to the movement work is about 8 turns of vehicle per hour along the whole implementing route. The roads which are planned to be main routes for materials transporting are Giai Phong, Tran Hung Dao, Dien Bien
Impact on landscape
If the construction encroach sensitive areas as ecological protection area, historical momuments . . ., it causes uncomfortable feelings to people and tourists. Within the project area, there is only historical monument of Dinh Bai Pagoda, which is locating near Truyen Thong Lake, and shall be partly impacted during the course of dredging and constructing the lake embankment. People going on pilgrimage shall face with barriers.
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VIETNAM URBAN UPGRADING PROJECT- NAM DINH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Dinh Bai temple by Truyen Thong lake Truyen Thong lake
Figure 4.1: Dinh Bai and Truyen Thong ponds
Dredging and embankment works of the lakes shall partly cause disorder in their scenery especially for the mud dredging which creates dirty smell as well as scattering situations of liquid mud to surrounding areas if works are not properly managed.
4.2.2.2. Impact of dredging, transportating and disposal of sediment from Canal and Lakes
4.2.2.2.1. Impact by dregding
According to the Feasiblity study, the volu~ne of the slude as flowing :
Table 4.10. Volume of the proposed sludge
Based on site surveys, local consultations and information provided by the DONRE, the existing aquatic ecology and water quality conditions of the targeted dredging areas are poor. The proposed dredging activities are expected to help restore water flows, exchange capacities and quality in the lower sections of waterway on the area.
During the process of dredging, sediment which lies at the bottom of the canalllake will be raised. As the stagnated sediment has been accumulated and disintegrated for years, it will generate exhaust fumes when contacting with the air. The generated fumes consist of Methane
(CH4), Sulphur Hydro (H2S), Carbon Dioxide (C02), which are the main fumes that cause unpleasant and bad odor to the surrounding place, especially in case the dredging is implemented in the dry season. Both CH4 and H2S are identified as toxic gases and can cause serious irritation and suffocation to people in high concentrations and long contact, particularly for the workers who carry out dredging. To avoid such potential impacts and risks, limited time exposure is required
Turbulence of bottom sediment and increnxing contantinants: apart from impacts which make
opaque of ponds and lake river increasing, sediment raised from the bottom of the river also leads to some increase in the content of other contaminants in the water such as heavy metal
- .-- --and bacteria accumulated in the bottom sediment. However, as m e n t i o n e d a b 7 channels and ponds which are not maintained, existing aquatic creatures and water quality of ponds and lakes are generally bad. Thus, although construction of embankment and dredging of channel and pond bottom temporarily pollute channels and ponds, but affects are recognized to dredged channels and ponds and affects on residential areas due to air pollution is unremarkable. Most important impacts for construction of embankment and dredging of
VIETNAM URBAN UPGRADING PRO.IECT - N A M DlNH lJRBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
pond are positive ones. Proposed dredging activities are expected to support recovery of flow, water changing capacity and water quality for these ponds as well as system of ponds in the area.
Oil and greasefrom dredging equipments: The lubricant in dredging equipment may mix into diluted sediment and drip into the river in the process of dredging. However, this source of pollution is estimated as being negligible.
4.2.2.2.2 Impact by the transporting the sludge
Sediment samples were collected within the proposed dredging areas in October 2007 and tested for key quality parameters (Hg, Cd, As, Cr, Pb and Zn).to assess disposal impacts and any special handling requirements. The summary results of this sediment testing are provided in Table and supporting laboratory results are Annex 2. There is no Vietnamese sediment quality standard, so similar to recent EAs prepared for World Bank funded projects, quality standards and sediment classifications used in Dutch Soil Clean-up Guidelines (1995; 1999), PEL standard (Permissible Exposure Limits), OSHA (Occupational Safety & Health Administrations) and TCVN 7209-2002 (for agriculture land) were applied and summarized in the Table below.
Table 4.1 1. Anatical results sampled on 101 2007
Source: Nam Dinh measuenzent and stadard, 2007
m: - B , : Nung Tinh (20°24'56"N; 106'10'IX"E)
- BZ : Bao Boi (20°25'33"N; IO6"0Y'41 "E)
- Bj : PhucTrong(20"25'4O"N; 106"09'25"E)
1
2
3
4
5
6
7
8
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 82
Parameters
Ash
TS
As
Hg
Z n
Cd
Pb
Cu
Unit
%
%
mglkg
mgkg
mgkg
mgkg
mgkg
mgkg
TCVN 7209-
2002
12
- 200
2
70
50
Dutch Soil
VYPe 1)
55
1.6
-
530
90
Value
PEL :' ? ( P P ~ - - +
17
0.49x103
315
353
91.3
B I
63.5
13.4
< 0.001
< 0.001
0.74
C0.01
0.017
0.28
B1
60.9
B3
70.7
15.6 2 0
< 0.001
< 0.001
1.52
<0.01
0.023
0.32 1
< 0.001
< 0.001
0.96
~ 0 . 0 1
0.019
0.4 1
VIETNAM URBAN IJPGRADING PROJECT - N A M DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessme~~t (EIA) April 2009
According to the results of the tested parameters and standards, the sediments to be dredged can be classified as safe for use or disposal without treatment. Following general practices and land use in the area, it is expected that these dredged sediments will be used for agricultural andlor landscaping use near to the dredging sites.
However, With total volume of sludge is 22,465m3 and if 5m3 tank trucks are used, the estimated number of trucks needed is 8,000 trips (25triplday). Because the dredged sediment will be in a very muddy condition, the main issue during transportation of dredged sludge is leakage on the transportation route, so it is necessary to apply the safeguard measures in an appropriate way during transportation. If it is not doing so, mud shall be leaked out and spread to the environment around the lake (residential, flower-garden,...), which causes uncomfortable smell and bad view.
Upon selecting location of dumping mud, it needs to pay attention to several features and conditions as follows:
Keep off surface water areas being used for civil activities or wells using underground water;
Not locating near residential area, which may cause smell impacts;
Not regularly flooding;
Mud dumping site should be at clear and sunny location so as to quickly dry the mud and avoid local impacts.
Based on the above norms, the consultant conducted surveys and worked with functional bodies as well as the authority and local people and recommend a dumping site of muddy and rocky waste (at Nam Van and Nam Phong sub-urban wards in the other side of Do Quan bridge), which is about 3-4 km away from the city's center (running along the dyke and away from residential area).
Treatment and management of the muddy dumping site should also be taken care of to avoid the situation where mud to be spreading over surrounding area (despite the fact that quality of mud satisfies for use of agricultural purposes as analyzed above). This issue shall be analysed in detail in mitigation solutions.
Thang L o n g Infrastructure Development Joint Stock Company (Infra-ThangLong) 83
Impacts of wastewater on uptake water for water treatment plant : Nam Dinh river, also named Dao river, taking water from Red river discharge to Day river. The whole length of river is 33 km '.
Figure 4.2: Location of discharging points of Quan Chuot pumping station (on Red river); Kenh Cia (on Dao river) and location of water collecting point of water plant on Duo river
According to water flow direction as shown in the figure, Red river water runs through discharging point of Quan Chuot pump station (newly constructed) to the confluence. At confluence,, a part of water is discharged into Dao river. Then, water will pass the discharged point of Kenh Gia pumping station and reach the confluence of Day river outside Namdinh
City. Thus, following above water tlow direcion, water quality at water uptake point on Dao
river of Nam Dinh Water Plant could be affected by wastewater from Quan Chuot pumping
station but hardly affected by Kenh Cia pumping station. Following measurement, it can be
' Source: Encyclopedia Wikipedia http:ll\fi.wikipdia.org/~~~ki/S~nggNammDinh
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VIETNAM URBAN UPGRADING PROJECT - NAM DINH lJRBAN UPGRADING SUB-PROJECT Phase [I Enironmental ImpactAssessment (EIA) April 2009
seen that the distance from discharging point of newly built Quan Chuot pumping station to
confluence to water uptake points for Narn Dinh water supply plant is LI= 1340m, length of the flow from confluence to uptake water for water supply plant is Lz=3340m, the distance from discharging point of Quan Chuot pumping station to water uptake points for Narn Dinh water supply plant is La=2400m following straight line.
Calculation issue:
At present, Quan Chuot pumping station no longer operates because it must be destroyed for newly construction. During construction process, waste water is no longer pumped into Dao
river from Quan Chuot pumping station. According to design, new Quan Chuot pumping station comprises many elements (I 3 units) The pump will operate with maximum capacity of 15.7-16.4 m3/s in heavy rain. According to information from Narn Dinh water supply plant, water uptake point of water supply plant comprises 1 pipe of 800mm diameter and it is located at -1,.At this level, water collecting pipe is always lower than river bottom elevation (- 0.8 + -0.6m). Thus, Narn Dinh water supply plant will use Dao river source at all time and all water levels.
In the scale of EIA report, environmental consultant groups has used mathematic model to assess the impacts of wastewater pollution at Quan Chuot pumping station on the quality of
water uptake after completion of Narn Dinh Urban Upgrading Project. The perdition is carried out in the period of 2012 - 2020 for different flow regimes of river during a years: Average, rainy season and dry season. These calculation results will be compared with river water at present time and the standard.
4.3.1. General parameters
- Annual average rainfall is 1,405 mm (3.85mm/day), in which it reaches 113 1 mm
(7.54 mmlday) in average in rainy season (from May to September); 264 mm (1.44 mmlday) in average in dry season from October to April (Statistical yearbook of Narn Dinh province. 2006). According to design, northern basin of 1065ha will be discharged through Quan Chuot pumping station. If so, average rainfall which must be discharged by Quan Chuot pumping station is 41,003 (m3/day) (80,301m3/day in rainy season and 15,336 m3/day in dry season).
- Total volume of annual industrial sewage is about 2,250 m3 daylnight; hospital waste of about 250 m3/day & night (EIA report, sub-component "lnvestmenf and construction of pumping sttrtiun for cli.scharging and enclosing channel in northern basin qj'Nanz Dinh city, April 2004).
- Average annual temperature is 24.4"C (28.6 "C from May to September in average); 20.8 "C from October to April) 6Ytati.vticul yearbook qf Nan1 Dinh province, 2006).
- Regarding other parameters, please see details in Table 10 and Table 1 1 - Annex A
Thang Long Infrastructure evel lo bent Joint Stock Company (Infra-ThangLong) 85
4.3.2.1. Calculation basis for diluting ability of waste waterZ
During waste discharging process of Quan Chuot pumping station, waste water is not immediately and completely mixed but partly mixed with river water. Disturbance coefficient a is calculated following formula of V.A. Frolop and I.D. Rosinle:
4 In which: q: Average output of waste water per second, m3/s. Q: Output of river water, m3/s.
a : Coefficient considering hydraulic factors during disturbance, calculating following below formula:
6 : Coefficient depending on location of discharging culvert, discharging location is near the
bank: 6 = 1.0.
E: Flow coefficient, defined following fomula of M.V. Patapop:
V,, .HI, E = ------ (Vtb: Average velocity of flow; Htb: Average depth of flow) 200
q : Coefficient considering tortuousness of river:
L; La: Distance from discharging culvert to calculation point following stream and straight line. Because waste water runs on Red river, then discharging into Dao river, calculation of concentration at water uptake point of water supply plant is very complicated. If hydraulic collision is omitted at river three-way, the length of mixing water from river three-way to the uptake point (LSgD,,= Lz=3340m) simply is equivalent with the length of a part of Red river
( LIRdK . ~ ~ H < H " , I ~ 1 Principle of mixing process is helped by water kinetic energy, the hydraulic loss is calculated
;1v2 by lenth unit defined as L = - - , Hence the ratio of length is equal with the ratio of square
2g b/ 2 L.,,T, - %XI I<,,, of velocity. We have: -- - . ~
, , v $ X H ~ , , ~ , T
'Draining water - volume 2 - waste water treatmcnt - Author: Viet Nam water draining and suppling association -science publishing house. Sponsor: SDC, DANIDA, WSP-EAP
Thang Long Infrastructure Dcvelopment Joint Stock Co~npany (Infra-Thang1,ong) 86
Otherwise, the depth of river is: H = Q.sh'lko - - g . ~ g H o n g ~ (B: the width of river) B.vglbo vsgl)ao BrpHring VspHong
Lsg~ong is the distance from discharging point of Quan Chuot pumping station (New one) to River three-way (LsgHong = L1= 1340m) La is the distance in straight line from discharging point of Quan Chuot pumping station (New one) to water uptake point of Nam Dinh water suppling plan in (La =2400m). The times diluting waste water into river water are calculated by formular:
4 The quality of water after the dilution is calculated by formular
Na = (a*Q*Nr + q*Ni)/(a*Q +q) In there
Na, Pollution concentration of river water right after mixing (mgll) Ni, Pollution concentration of waste water stream (mgll) Nr. Pollution concentration of river before discharging waste water(mg1l)
4.3.2.3. Principle to calculate the capacity of waste water's self-clean
Besides dilution and dispersion factors, pollution concentration is predicted to decrease because of natural decomposition by the time or by the distance to waste source. Following kinetic pricible, Waste water' s self-clean can described by equation :
In there: N - BOD5 at the time t K I - Coefficient of reaction velocity
Integral Calculus for above equation from time t=O (this time BOD5 is No) to any time, we have:
Ln(N-No)=-kl t N= N~ e-k" = N~ lo-'“ ( k=k1/2.303)
Coefficient k depents on the temperature of water. When the temperature increases, k also increases. With time calculating as day. by experiment, Formular to calculate coefficient k is established as below :
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Because BODs--~ormally - is defined at the temperature of lab20°c, with c o x l e x of waste . .- ~- . ~ . . . . . ~. ... . . - . - . .-- -- --- - - water 'and source water, k (20") - - 0.1. Hence, the foku1ar"to' calculate k accord~ng temperature T as below :
4.3.3. Selection calculation parameters for operation mechanism
To define the affects of project in operation phase, the affect of discharging point at Quan
Chuot pumping station is defined. Calculation follows 3 mechanism: the first: average operation mechanism in year, the second: the most advantage operation mechanism at rainy season, the third: the most disadvantage operation mechanism at dry season. The population
of project area will increase about 8% per year (estimate by data statistics of natural population raise.) Like this the amount of domestic and industrial waste water also increases with equivalent ratio. Otherwise, the yearly amount of rain water normally fluctuates around tlie average amount of last years. Hence, pollution lever of waste water pumped from Quan
Chuot pumping station will gradually increase by years if it is not treated. Calculation will define the lever of impact by years (from 2012 to 2020) including three mechanisms.
4.3.3.1. The fist mechanism: average operation mechanism by year.
Project is expected to operate at 2012. At this mechanism, calculation parameters are listed as below:
- q: average flow of wast water per second. at average operation mechanism, Quan chuot pumping station will operate at 70% of maximum capacity.
- Q: average flow of Red river using to calculate is 3800 m3/s, average flow of Dao river
is 896 m3/s. - Average width of Hong river: 800 m, average width of Dao river: 300m - Average height of water lever: 1.52, average heigh of river bottom: - 0.7 m. average
depth: Consider that average depth of Red river and Dao river is the same at
calculation area, we have: Htb = Average height of water lever - average heigh of river bottom
= 1.52 - (-0.7) = 2.22 m - The distance from discharging gate to river three way: 1340 m, the distance from river
three way to water uptake point: 33401n - Yearly average temperature: 2 4 . 4 " ~ - According to calculation table of waste water quality (table 12 annex A): BODS
concentration of waste water from 20 12 to 2020 is Ni=130-158 mgll, quality parameter of river water for calculation is the highest BODs concentration of the river: Nr-16 mgll.
The calculation results are presented in table 13 of annex A
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4.3.3.2. the second mechanism: the most disadvantage operation mechanism at rainy season.
At the most disadvantage operation mechanism at rainy season, calculation parameters are selected as below:
- q: average flow of wast water per second. at average operation mechanism, Quan chuot pumping station will operate at maximum capacity. q=16m3/s
- Q: average flow of Red river using to calculate is 440 m3/s, average flow of Dao river is 103.75 m3/s (Because the lowest flow of Dao river is 0 so such calculation will be nonsense if Red river water do not discharge into Dao river causing the pollution. Otherwise, the lowest flow of Red river equals 11.58% of average flow and running mechanism of such two rivers relates closely each other. Hence, we will use calculation flow of Dao river in this situation equals 1 1.58% of average flow )
- Average width of Hong river: 500 m, average width of Dao river: 200m (at low flow) - Average height of water lever: - 0.42, average heigh of river bottom: - 0.7 m. average
depth: Consider that average depth of Red river and Dao river is the same at calculation area, we have: Htb = Average height of water lever - average heigh of river bottom
= - 0.42 - (-0.7) = 0.46 m - The distance from discharging gate to river three way: 1340 m, the distance from river
three way to water uptake point: 3340m - Yearly average temperature: 28 .6 '~ - According to calculation table of waste water quality (table 12 annex A): BOD5
concentration of waste water from 20 12 to 2020 is Ni=94-127 mgll, quality parameter of river water for calculation is the highest BOD5 concentration of the river: Nr=16 mg/l.
The calculation results are presented in table 14 of annex A.
4.3.3.3. the third mechanism: the most disadvantage operation mechanism at dry season.
At the most disadvantage operation mechanism at dry season, calculation parameters are selected as below:
- q: average flow of wastewater per second, at average operation mechanism, Quan
chuot pumping station will operate at maximum capacity. q=16m3/s - Q: average flow of Red river using to calculate is 440 m3/s, average flow of Dao river
is 103.75 m3/s (Because the lowest flow of Dao river is 0 so such calculation will be nonsense if Red river water do not discharge into Dao river causing the pollution. Otherwise, the lowest tlow of Red river equals 1 1.58% of average flow and running mechanism of such two rivers relates closely each other. Hence. we will use calculation flow of Dao river in this situation equals 1 1.58% of average flow )
- Average width of Hong river: 500 m, average width of Dao river: 200m (at low flow) - Average height of water Icver: - 0.24, average heigh of river bottom: - 0.7 m. average
depth: Consider that average depth of Red river and Dao river is the same at calculation area, we have:
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Htb = Average height of water lever - average heigh of river bottom
= - 0.24 - (-0.7) = 0.46 m - The distance from discharging gate to river three way: 1340 m, the distance fiom river
three way to water uptake point: 3340m - Yearly average temperature: 2 0 . 8 ' ~ - According to calculation table of waste water quality (table 12 annex A): BODs
concentration of waste water from 2012 to 2020 is Ni=172-188 mgll, quality parameter of river water for calculation is the highest BODS concentration of the river: Nr=16 mgll.
The calculation results are presented in table 15 of annex A.
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Table 4.12: Estimated change of BODs river water at water uptake points on Dao river after being mixed
Maximum limitation
TCVN 5942: 1995 column A
<4
Unit
m g/l
mgll
mgll
Maximum limitation
TCVN 5942: 1995 column B
<2 5
<2 5
The year 2012
16
16.3
0.3
The year 2017
16
% 1.07%
mgll 18.8
mg/l 2.8
% 16.1%
The year 2018
16 --
16.4
The year 2019
16
16.4
The year 2020
16 --
16.4
The year 2013
16 --
16.3 --
0.3
The year 2016
16
16.4
Operation regimes Criteria
BOD, concentration of current river water (not yet be affected by the project)
BODS concentration of river water at water uptake on Dao river after being mixed
Increasing rate of BOD5 compared with initial river water
Increasing rate of BOD, compared \\.ith initial river nater
Average operation
regime in year
BOD5 concentration of river water at water uptake point on Dao river after being mixed
Increasing rate of BOD5 compared with initial river water
Increasing rate of BOD5 compared with initial river water
Most disadl antageous
operation regime in rainy
season
BOD, concentration of river water at water uptake point on Dao river
- Lim~tation TCVN 5942: 1995 Column A applied to run-off water may be used for run-off water which may be used as domestic water supply Murce (but must through treatment process following regulations), - Limitation TCVN 5942:1995 Column B applied to run-off water may be used for run-off water which may be used for other purposes, there is regulation for water used for agriculture and aquiculture
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Estimated change of BODS river water at water uptake points on Dao river I after being mixed
The year The year The year The year The year The year The year The year The year 2012 201 3 2014 201 5 2016 2017 2018 201 9 2020
- -~ ., +Awrage operation regime in year I
! +Most disadmntageous operation regime in rainy season
Most disadmntageous operation regime in dry season ~ . BOD5 concentration of current riwr water (not yet be akc ted by the project))
I +Maximum limitation TCVN 5942:1995 column A
&Maximum limitation TCVN 5942 1995 column B
Figure 4.3: Map of estimated concentration of BOD5 of river water af water uptake point of waferplanf on Dao river after miving with wuste water of Quan Chuof pumping sfation
General comments: - According to monitoring data, at present (not being affected by the project, Dao river
water quality (14-16mgll) and Red river water quality (9-12rngll) is higher than standard in TCVN 5942: 1995 Column A (surface water can be used as domestic water supply source but must be treated as regulations). If so, water source of Dao river is not currently meeting requirements on using for water supply plant as domestic water supply source.
- From summary of calculation rcs~~lts, when the project is in progress, river water quality at water uptake points of the water plant will be degraded. However, the rate of degrading does not make the concentration of BOD5 of river water at water uptake points on Dao river exceeding the maximum limitation in Standard TCVN 5942:1995 Column B (application to run-off water used for other purposes. there are regulations for river used for agriculture and equiculture plant).
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Regime 1: Average operation regime in year: If Quan Chuot pumping station is always operated at average pumping regime (70% of maximum capacity) while water level and river output is at average rate, water quality is calculated at water uptake point on Dao river unremarkably change (from 1.07 to 1.58%) thanks to disorder and self-cleaning of water, concentration of BODs may reaches 16.4mgll up to 2020. Regime 2: Most disadvantageous operation regime in rainy season: In rainy season, if pumping station is operated at maximum capacity at the time of water dry and lowest volume of river water. At that moment, although waste water of the city was diluted by rain water but concentration of BODs in river water at river uptake point on Dao river increase from 16% (in 2012) to 24% (in 2020). Concentration of BODs is expected to reach 20mgll up to the year 2020. Regime 3: Most disadvantageous operation regime in rainy season: In dry season, when waste water is little diluted by rain water. If pumping station is operated at maximum capacity while water level and river output is at average rate, water quality is calculated at water uptake point on Dao river changes from 34% to 38%. If so, at this operation operation, from the starting time of the project, concenration of BOD5 compared with current river water concentration of over 4mgll. Accordingly to calculation, concentration of BODs of river water will be from 21.7 mg/l and reaches 22.3mgll as maximum rate in the year 2020. This rate possibly makes water source exceeding the standard TCVN 5942: 1 995 Column B (25mgll). If impact which makes concentration of BODs of river water increased of over 20% is considered as unacceptable rate, it is absolutely not to operate Quan Chuot pumping station in dry season at the time of low volume right at the first year when the project is commenced (the year 2012) and not to operate pumping station in rainy season when lowest capacity is recognized in the year 201 6.
In fact, pumping station is seldom operated in above disadvantageous regime. Besides, the Consultant also, during calculation, ignored self-cleaning regime of waer prior to pumping out to the river, these self-cleaning regimes are deposit regime, organic disintegrating regime, etc when waste water is kept in regulated ponds and fields. Besides, if there is a proper operation regime of pumping station and regular information exchange between water plant and operation unit of Quan Chuot pumping station, it will be a method help effectively reduce affects on water quality. (following calculation results in Table 13, 14, 15 - Annex A, after Quan Chuot pumping station stops pumping water from 0.036 to 0.042 day or from 50 - 60 minutes, the water plant can take water from Dao river for treatment). From above reasons, it can be generally judged that water quality at uptake point affected by project impacts will reduce about 5- 10%.
In calculation, the Consultant tried best to state Illany actual parameters so that results are most reliable. However, in fact, quality and volu~ne of waste water, river water have many unanticipated changes. 'Thus, project operation phase should have sufficient and strict program of environmental monitoring in order to timely detect and treat when water quality changes out of estimated rate. Proposals for present method and long-range method will be presented in more detail in Chapter 6 . Environmental Management Plan ofthis report.
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CHAPTER 5 ALTERNATIVES OF THE PROJECT
5.1 Without the project situation
In case Vietnam Urban Upgrading Project, Component 2, Phase 11, construction of garbage collection system from low-income residential areas, dredging main embankment and regulated ponds, disadvantages and difficulties may encountered for the project area and for the entire Nam Dinh City as follows:
Flooding situation will get worse and causing bad effects:
In current situations of present Nam Dinh city (2008), with newly-built construction works following the plan, flooding situation is warned because i t may cause difficulties and
damages in many aspects. Following the urban development plan which was approved and is going to be commenced, service & tourism centers and new urban areas will be developed in the northern area of Nam Dinh City where provincial headquarters, industrial production enterprises, schools, hospitals, sports and entertainment centers are located. Kenh Gia in the southern area of the City is also an important draiange alignment which was built with support of Switzerland Government and being operated well. It also helps to reduce flooding situation for southern areas. However, because connection system from low-income residential areas to Kenh Gia is still not syschronic, Kenh Gia has not operated with most effective capacity. If so, necessary infrastructure structures must be developed in synchronization, especially urban drainage system of the entire city. Thus, if it is not invested, flooding situations will bring the disadvantages as following:
+ Destroy road system and cause traffic jam.
+ Waste water will cause deseases and affect the environment and public health.
+ Cause loss and damages and create unstability for public utilites and social conditions.
+ System of urban regulated ponds is overload, affecting aesthetic aspect and the
environment.
+ Flooded agricultural area will affect urbanization process.
Flooding and sediments (sand, soil, suspended solitd, etc. ) make water flow stuck. Therefore, a big amount is taken from local annual budget for regular dredging of channels, drainage culverts and ponds.
In case, the project is not carried out, it will cause difficulties for implementing other planning targets of the city in urbanization process, affecting the economic, cultural and social situation of the local area.
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- Minimizing resettlement was carefully considered during designing of the project. primary and secondary Main Drainage Construction and embankment construction, dredging, transporting and disposal of Sediment from Canal and Lakes
- Alternatives for realignment of Loc Ha river was considered to minimize resettlement and preserve cultural properties such as the temple at the Truyen Thong
- Alternatives of sludge transportation and disposal were considered to minimize the adverse impact to the environment. Nam Van landfill was proposed due to be 1.5km far away fiom Do Quan bridge and 2.5km far away from the city center and managed by the Nam Dnh Urban Works Company. This distance can be considered as safe distance as not to cause affects on city residents like smell, dust, noise, exhaust fiom sludge dumping and it is also suitable distance for project transport means.
- The two options of sewer type were considered and analyzed, that are Cycle and Culvert box of sewer. The second one was chosen due to suitable for Nam Dinh city which the elevation was low and could not feasible with the cycle sewer type.
5.3. Environmental impacts of technical options in case withhithout additional capital
Objectives of the project are based on pre-feasibility study report as follows:
Give priority for upgrading of tertiary infrastructure in LIAs, including electricity, road, schools, stations, especially constructing water supply and drainage system, minimizing flooding situation in residential areas, improving living standards of poor residents through improving environmental conditions.
Then, evaluating and salvage exploitation capacity of eixisting drainage works such as canals, lakes, main culvert alignments, upgrading culvert alignments under primary and secondary infrastructure in connection with tertiary infrastructure of LIAs and in connection with primary infrastructure to create a complete system and promote the synchronization of upgraded infrastructure works under Component No.1, phases No. 1,2 and Component 2, phases No. 1.2. Minimizing local flooding situation at 31 flooding locations in the city.
However, there is a fact that in recent years. inflation situation has seriously happen in all over the world, including Vietnam. This makes the construction material cost quickly increased. Therefore, a risk can be recognized that the Owner will not have enough financial capability to implement all construction items which were initially proposed in the project approved and funded by WB and Government.
If the provided capital source following initial cost estimation and approval is not enough for implementation of the whole project as planned, the Owner shall cancel some project items or reduce construction quantity. This is unexpected thing. If additional capital is not provided,
-
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priority will be given to upgrading of tertiary infrastructure for LIAs and remaining capital will repectively distributed for upgrading primary and secondary infrastructure works.
Priority order was set up by PMU and Consultant based on following criteria: Flooding level, flooding frequency, flooding time, flooding affected residents, opinions of residents and local authority, cost for implementation, etc.
Afier discussions among PMU and Consultant and through opinions of local residents and authority, necessary culvert alignments of primary and secondary infrastructure works were selected. However, there is a risk that some culvert alignments will not be implemented due to the lack of capital:
L2+l Hang Thao - Ma Dien alignment - 4
D2 Mac Thi Buoi drainge alignment
D3 Hung Vuong drainage alignment
1 5 I D5 1 Drainage alignment along the path to Nguyin Trai School I Nguyen Co Thach drainage alignment
My Xa drainage alignment
a) Without additional capital
If not being provided with additional capital, some primary and secondary infrastructure works cannot be implemented or even some technical standards can be affected. Some general affects can be summarized as follows:
Newly built tertiary infrastructure works will not be supported by primary and secondary infrastructure works and the whole system will not operate effectively. On the other hand, if primary and secondary infrastructure works of phase 2 are not implemented sufficiently, tertiary infrastructure works cannot effectively operates, even losses effectiveness. This may result in the fact that constructed works will become degrading and it can be said, to some extent, that it is similar to the case without project.
If technical standards cannot be ensured, the project quality will be very poor. Construction quality, in Consultant opinion, must be ensured in any case.
The Consultant will make more detail by analysing potential affects in case some drainage culvert alignments are not invested for construction:
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Table 5.2: Current flooding situations and expected improvements after construction of some culvert alignments
Notat Area of ion basin (ha)
1 Items i. 1 L2 ( Dredging Nang Tinh lake 4.7ha I
i Hang Thao - Ma Uien 263. l ha I" ) alignment
I
- Hang Thao
- f f u ~ nh Thuc Khang - \lav Clrar - Cua Truo~rg
- To Hreu
I - ,\gl!ven Ibn Trol
Ha Huy Tap I - . - - 1 1 - Ibn C'oo - Phan Dinh Gin!
Length (m)
Starting point --
Hang Cau (D1.1)
Ending point I Current flooding situation Improvements after constructed
Heavy rain, lake water is slowly discharged due to keeping water for feeding fish Residents encroach lake banks, lake surface with a lot of water-fern, black water, bad smell are air and underground water pollution sources and causes of diseases and much sediment.
LIA No. 4 Help regulate the common drainage system and directly regulate basin No.2 before discharging into Gia canal.
Nguyen Van Troi (D I. 10)
Connect drainage system for LlAs 3.4,5,8.'3,15:16 and reduce flooding situation for Hang Cau, Phar Dinh Phung, Hang Thao, May Chai, Cua Truong
Ha Huy Tap and Van Cao areas
. . . ..
Hollow area, poor drait~ag
Hollow area, slow drainage - --.
I I I I I I I I The whole drainage system connects drainage for
I / - ,Mac Thi Ruoi I I I I I Heavy rain, poor drainage I
Notat ion
1 - H a n T h i ( v e n 1 1 1 1 1 Heavy rain, poor drainage I
1 / 010 canai
: Items
D5
I I ; - I'oi Gacl? marker I I I I 1 Heaiy rain, l~ave no drainage system I
Ending point
I / - Gral Phong road I
Area of basin (ha)
Drainage alignment along the path to Nguyen Trai School - .bfy Trong hamlet - the
/ - Road lo lgziyen Trai
Current flooding situation
I section connecting to
, Nguben Co Thach drainage Dao river D6 dyke (D6. I)
Length
(m) lmprovements after constructed
Heavy rain, have no drainage system
54.8ha
Heavy r a w poor dralnage system
Starting point
1 Heavy rain, poor drainage syslein I
1100 Voi Gach
market (D5,1)
Vu Huu Loi (D6.4)
Source: Investment Report - Upgrading Primary and Secondaly Infrastructure - Phase 2 - Nam Dinh City (Coffey Consultant; March-2008)
Further refer to locations of culvert alignments which are not constructed if lacking of capital Figure 1.6
D7
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T3- 1 1 canal (D5.6)
Heavy rain, Dao river water level increase
The whole drainage system connects drainage for LlAs 6, 19 and reduce flooding situation for are near mechanical plant. -
Nguyen Co Thach culvert alignment is locared on the left bank of southern Dao river for the purpose of drainage in the new area without culvert.
Tran Dang Ninh drainage alignment
D9 My Xa drainage alignment
19.7 ha
Cia canal (D9.4)
450
poor drainage system
Le Hong Son (D7. I )
Drainage system helps facilitate No. I and reduce flooding situation at ending area of Tran Huy Lieu road.
Nguyen Hien (D7.3)
Heavy rain, drainage culvert get degrading Connect with drainage system of Nguyen Hien and Hoang Hoa lharn roads
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Following above analyis, it is clearly recognized that existing culvert alignments are not currently meeting drainage requirements of the area due to poor drainage situation of this culvert alignment or there is no drainage culvert. (It is required to arrange these culvert alignments for drainage of approximately over 50% of flooding locations like Hang Cau, Phan Dinh Phung, Hang Thao, May Chai, Cua Truong, To Hieu, Ha Huy Tap, Van Cao, Nguyen Trai, Phan Dinh Phung, Tran Te Xuong, Nguyen Thi Minh Khai, Hang Can, area near mechanical plant, the area at the end of Tran Huy Lieu road)
a In addition, after teriary infrastructure of some project LIAs of the project is completed, it must be connected with these culvert alignment for the purpose of drainage. (There is totally 16/26 of areas having demand of connecting to at least one of the above alignment. They are LIAs No. 1 , 3, 4, 5, 6, 8, 9, 10, 1 1, 14, 15, 16, 17, 19, 20 & 22).
In the future, population of Nam Dinh city will increase (about 8% in average). This means that domestic waste water volume which need to be discharge will increase accordingly. Meanwhile, if the above culvert alignments are not upgraded, it will be unavoidable that these culvert alignments will get degrading and the number of
flooding affected people also increase with time.
a If the above culvert alignments are not upgraded due to the lack of capital, there will be financial waste for project preparation works like survey, design, public consultation. Simultaneously, this also make the belief of residents to the project decreased. In case, these culvert alignment must wait for capital and put in other phase (or put in other project), it will be difficult to get agreement on design aspect for
invested items of this project.
Therefore, it can be said that, in case witlzout project and not being provided with additional capital, drainage effect of project LIAs only reaches about 40% (10/26 of LIAs are connected to newly built primary and secondary infrastructure works); not absolutely solve current flooding situution; losing belief of resident; and causing unnecessary activities relating survey, design calculation, public consutation in project preparation phase.
b) In case with additional capital for the proiect
The above presentation clearly presented potential damages in case not being provided with additional capital. If so, once being provided with enough capital, (i.e being provided with additional capital (due to actual requirements), works will be completed in synchronization to overcome the above potential darnages. This will bring big benefits for Nam Dinh city generally and poor residential communities ofthe city particularly.
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CHAPTER 6
ENVIRONMENTAL MANAGEMENT PLAN
6.1. Mitigation measures 6.1 .I. General principles
L Design stage In the design of drainage and sewerage, attention should be paid to preventing the possibility of contaminating the domestic water supply. Special attention has to be paid to the possible crossing of water pipes and sewers. For this purpose, it will not be allowed to have water pipes going through the same drainage manholes or box culverts. If possible, the drainage and sewer systems should be designed to be located as far as possible from water pipelines. Discharging points of the drainage system have to be selected so that the adverse impact is mitigation and the back flow of drainage water to pipes is prevented or mitigation. Drainage
design principles have to be selected in co-operation with the other projects being implemented in the same area to ensure consistency between projects and to optimize the
effectiveness of the constructed drainage system with minimal site and community disturbance. Upgrading and dredging of channels has to be designed to minimize the need of resettlement and to assure proper construction and maintenance access is provided. Transport and disposal of excavated material has to be properly designed and appropriate disposal areas identified and reserved. To minimize transport and off-site impacts, maximum on-site or near site use of excavated and dredged materials will be encouraged. Deposited solid wastes and any contaminated sludge materials which are blocking existing drainage pipelines and channels will be transported to the landfill for disposal, but most excavated organic materials can be used locally for agricultural and landscaping purposes. Handling and disposal of sediment and
solid waste to specified places with suitable means of transportation has to be coordinated with relevant authorities.
C Construction phase All construction work funded by the sub-project will need to be implemented in accordance with the appropriate standards, specifications and Bidding / Contract Documents. The
preparation of these Bidding / Contract Documents as well as the TOR for the construction management consultants (CMC) will be subject to Bank reviews and issuance of a No Objection Letter (NOL). The general mitigation measures corresponding to each environmental codes of practice (ECOP)are presented in the following section. The technical specification for construction of t runk system and dredging are provided in the annex C. i Operation pltuse
In operation phase, project performance indicators shall be regularly measured and monitored. Besides. method of management and monitoring in environmental management and monitoring programmer shall be observed. Organization of environmental monitoring for the whole project is presented in the section below.
- - - -
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6.1.2 Generic mitigation measures
6.1.2.1. In pre-construction phase Mitigation measures for impacts on pl~ysical environment: EIA of pre-construction
phase (item 4.1) of this report indicated that impacts of this phase like solid waste, water environment are not remarkable and no more mitigation measures are required. The problems
which should be paid attention to is increasing dust due to dismantement and relocation of houses (6 households) also happen in short time (always take 3-4 days). Mitigation methods comprise sing dust comprise covering method with canvas and covering plan for adjacent houses (next to dismantled houses); quickly transport solid waste out of dismantled area (transport right after dismantlement so as not to cause long-time staying of discarded materials which may cause unhygienic situation and affects traveling of residents and traffic means or affects landscape in the area.
Mitigation measures for impacts on psychology of displacedpersons: The Project implementation shall cause 6 households to be moving out of their living
area, 52 households and 9 organizations to be of temporary impacts so that it needs a co- operation among authority levels in dividing suitable construction sections for mitigation of impacts on the air environment and scenery in the area.
Resettlement policy to be applied during the course of carrying out the Project on Infrastructure Upgrading of level 1 , 2 Phase 2 - Nam Dinh city shall be harmoniously carried out in accordance with requirements of the World Bank (Safeguard Policies 4.12) and laws and regulations of Vietnam. Principles being provided by the Project's resettlement policy
comprise: - All of people being impacted by the Project, not limitation to their ownership situation,
economic & social positions shall entitle to indemnification and support for their loss of
assets, income, and business-production conditions as in pursuant to superseding prices, and be supported with suitable resettlement solutions in order to help them improve or at least restore their living standards, income, and production capability to the extent of similarity before the Project was initially carried out.
- Land price applied for compensation (indemnification, support) of damages is defined closely to the actual market price of transferring land use right in normal conditions. Once there is different in such price level, it shall be suitably adjusted.
- Co~npensation for houses. and construction being impacted shall be in accordance with value of new construction of houses with technical requirements in similar to the damaged
houses or construction but not depreciating for material to be used or depreciated. - The Tram Ca resettlement area shall be constructed with complete infrastructure and
public services so that residents being impacted by the Project implementation can use such services. Besides, financial services and credit organizations and other activities in relation to the resettlement area shall be arranged thereto.
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Movement of households being impacted by the Project implementation to resettlement area, and land allocation in the resettlement area and other necessary works shall be completed at least 30 days before the date of initiating the construction.
Applying solutions: - Deeply and widely propagandizing on the State's economic development policy and
compensation principles to people. Carry out the propagandize on the responsibility of properly following obligations and right execution and the law.
- Provide public information in respect of price level applied for compensation (detail of various types of assets to be compensated) to the impacted residents.
- Making public and exactly inform quantity for compensation of each households 6.1.2.2. Construction Phase The general mitigation measures, which are environmental codes of practices (ECOP) are presented in Annex C and applied in construction phase (Tables 6-1 and 6-2. These measures could be applied to generic project activities in constructing Primary and Secondary Main Drainage and Improvement of Phuc Trong canal, Bao Boi, Nang Tinh and Truyen Thong lake
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Table 6-1 Summary of generic impacts and EMP for Primary and Secondary Main Drainage
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 103
Note: During construction phase, besides the mitigation measures given in the table below, the Contractor shall comply conditions in general
given in Annex E Who is
responsibilities
Contractor
PMU
Contractors
Contractors
I Contractors
Contractors
Contractors
Specifications Schedule
Pre- construction phase
Construction phase
During construction
During construction
During construction During construction
Before disruption, 1 week for the
in Annex C and the Technical Mitigation measures
- Cover by canvas and have
covering plan for adjacent houses - Quickly transport solid waste out of dismantled area Disseminate and have reasonable compensation policy and implementation
Applied ECOP, including; - D l , D3, D4, D5
Applied ECOP, including; - N 1, N2, N3, - A l , A2
Applied ECOP, including; - W4 Applied ECOP, including; - W l - W2 Applied ECOP, including; - DCI - PC1
Activities
, Constructing related I 1 prlmary and
I secondary 1 drainage I seners I
1 !
I I I I
of this Report Budget
Included in
contract
Budget fund
Included in the contract
Included in the contract
Included in the contract Included in the contract
Included in the contract
mitigation measures - ECOP Impacts
Preparation Phase - Increased dust due to work dismantlement
- Disorder ps!chology due to work dismantlelnent for land clearance
Construction Phase: - Increased dust levels due to earth work excavation and construction activities
- Increased noise and air emission from transportation vehicles and construction equipment
- Stagnation of wastewater due to blocking of sewers - Generated domestic waste by workers
- Temporary disruption of drainage system
Monitoring by
PMU
Resettlement independent monitoring consultant
PMUICMCI EMC
PMUICMCI EMC
PMUICMCI EMC PMUICMCI EMC
PMUICMCI EMC
Indicator
Table 6.3
VIETNAM URBAN UPGRADING PROJECT - N A M DINH URBAN UPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
Thang Long Infrastructure DeveIopment Joint Stock Company (lnfra-ThangLong) 104
Activities
1
Impacts
- Temporary flood during rains
- Temporary storage o f materials and excavated soil causing obstacle to public and traffic
- Temporary disturbance to small businesses
- Risk of accidents
- Increased traffic !lo\\
Operation Phase
- Odor during sludge dredging
- Impact to air quality and water resources at the Hong river
Mitigation measures
- W4
Applied ECOP, including; - W4 Applied ECOP, including; - T I . T2, T3
Applied ECOP, including; - PC2 - El Applied ECOP. including; - HSI, HS2. HS3. IHS4, HS5, HS6 Applied ECOP, including; - T I . T 2 , T 3
DC. 24h for community During construction at least 7 days before construction
at least 7 days before construction During construction During construction
every 6 months or annual every 6 months or annual
Who is responsibilities
Contractors
Contractors
Contractors
Contractors
Contractors
Nam Dinh Urban Work Company
Nam Dinh Urban Work Company
Budget
Included in the contract Included in the contract
Included in the contract
Included in the contract Included in the contract
City budget
City budget
Monitoring by
CPMUICMCI EMC PMUICMCI EMC
PMUICMCI EMC
PMUICMCI EMC PMUICMCI EMC
Water Supply Company
Indicator
VIETNAM URBAN UPGMDING PROJECT - NAM DlNH URBAN UPGRADING SIJB-PROJECT Phase 11 Enironmeatal Impact Assessment (EIA) April 2009
Table 6-2 Summary of Generic environmental impacts and EMP for Improvement of Phuc Trong canal, Bao Boi, Nang Tinh and Truyen Thong lake
Note: During construction phase, beside the mitigation measures given in the table below, the Contractor shall follow conditions in General Mitigation Methods - (ECOP) in Annex C and Technical Specifications given in Annex E of this Report
Boi. Nang Tinh. Truyen Thong lake
equipment - Increased noise and air +WE-/ During
Activities Lining of both side of Phuc Trong canal. lining the Bao
Contractors t
Schedule
During construction
Who is responsibilities
Contractors
Impacts Construction Phase: - Increased dust due to mo\;ement of tl.ansportation vehicles and construction
construction
1 week for the DC, 24h for community
Give priority for construction
Mitigation measures
Applied ECOP, including; -[)I: D3,D4,D5
emission from transportation vehicles and construction equipment - Leakage of residual oil and
of 5 0 h of lake embankment I in front of pagoda gate. I Use fence for protecting being constructed lake 1 embankment and materials
construction - Increased traffic no\\; Before Contractors
construction, 1 week for DC, 24h for community
- Risk of landslide - HSIO, HSI I During Contractors
- N1, N2, N3, - Al , A2
- 0 1
Budget / Monitoring by
construction
During
-
Contractors
Not carry out construction on the fifteenth day or the I* day of lunar month along the
the contract
lncluded in the contract
lncluded in 1 PMUICMCI
PMUICMCI EMC
the contract 1 EMC Included in PMUICMCI
Indicators
the contract
-- -- Table 6. 3
EMC
Table 6. 3
?'able'& 3
Table 6. 3
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Activities
pagoda gate. - Economy impact for the fish- ( - Need to provide information to / At least 3 months /
1 raising businessmen on the I the local authorities and ( before construction ( I
Impacts
lakes
Schedule Mitigation measures path to the pagoda (about 50m). Clean up and coIlect material on the path to the pagoda I day before. - Daily clean and transport discarded soil from the
community (businessmen) at least , 3 months before construction
Who is responsibilities Budget
--
Included in the contract
PMUICMCI EMC
Indicators 1. Dredging. transporting and disposal of sediment rrom Phuc Trong canal. Bao Boi. Nang 1 inh. lake
I pollutant dispersion 1 - handle sludge directly to tank I 1 I I 1 1
Construction Phase: Volume of sediment 70.470 m3 Dredging
Increasing turbidit! and
.-
*During I construction
- use bucket
Nam Van - Increase dust level / - clean trucks before leaving the I During
Contractors
I truck
Applied ECOP, including;
trucWday on the route from density residential area or in rush
-
During construction During construction
During construction
- Odor during sludge dredging
- Leakage of residual oil
Transportation
During 1 construction
During construction the contract
- use tank truck to store and transport sludge
site - spraying water at least twice per day to reduce dust on the transportation road, from dredeing to disoosal site
the contract
Contractors
Contractors
Contractors
construction
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 1 06
Included in the contract Included in the contract Included in the contract
- laying sludge at the cell by layer - drying up - separate leach ate from dredged
Who is res onsibilities
During construction
sludge and pre-treat by lime - raise sign board to warning i
Company has responsibilities in management of sludge
Contractor shall sign contract with the Nam Dinh urban works
i Company for disposal of dredged sludge, The
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Included in the contract
PMUICMCI EMCDONRE
VIETNAM URBAN UPGRADING PRO.IECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
6.1.3 Specific mitigation measures during construction p h a s e 6.1.3.1. Mitigation measure for air pollution, noise
- Exhaust and dust are major pollution factors and give great intensive impacts during the construction. Pollution caused by construction works is transportation means carrying material in and out the sites. Solutions as stated below shall be applied for mitigation: living regulations shall be appeared at camping locations, and people are requested to abide hygienic solutions, empty rubbish at regulated place and bring it to local dumping site.
- During the construction, impacts caused by the air and dust coming from roads and operations of bulldozers and trucks carrying material for land filling shall be mitigated as follows:
+ gravel and sand being transported in wet condition shall be covered by canvas to keep material from scattering out;
+ Periodically water in dry days to temporary roads, and land filling areas, which should be of 4-5 timeslday.
+ Apply corrugated iron or plastic sheets for temporary closing and protecting material
sites (soil, sand, gravel..);
+ build up washing station for carrying trucks at construction sites in order to clear
mudlsilt being stacked to tires and scattered to roads; + The project owner and contractor shall provide complete equipment for workers in
terms of noisy and dusty protection, safety helmets, and such equipment shall qualify labor
requirements for workers; + Set up an emergency medical center for handling labor accidents at site for workers.
6.1.3.2. Mitigation measure for water pollution Within the Project's framework, to maintain quality of surface water and not
deteriorating to quality of water in the area. it shall work to mitigate at maximum level for
those of negative impacts which mainly come from the two operations as follows:
* Regarding the construction of culvert lines - Minimize at maximum level of mud upon coming in water flow by applying following
solutions: Prevent water from overflowing to the construction site by making them to reinforced positions; heading the current to flow from construction sites to selected positions for sediment stagnation before joining to natural current.
Intensify site management of the Contractor by weekly meetings to send instructions
of PMU and Consultant on environrcntal sanitation and promote the community
monitoring responsibility in local area. The Contractor is required to regular transport excavated soil from thc site and cover transport vehicles by canvas to reduce scattered and swept soil.
- Use removable latrines fbr workers on site. - Construction material of hazardous chemist as diesel production shall be stored at far
distant from water source, which is not under 1 OOm, and at positions where such substances cannot directly ,be penetrated to water current by rainy water;
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VIETNAM URBAN UPGRADING PROJECT- NAM DINH URBAN UPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
- Install water pump for the purpose of flow stop and use temporary pipe to pump water out to other drainage culverts which are not prevented. Simultaneously, regularly clear
congested manholes surrounding the site. When it is forecasted that there will be heavy rain, the Contractor should pump all water out to limit water stagnancy.
* Construction of Lake embankment: On basis of construction agreement and supervision activities, the Project Owner shall
request contractors to fully carry out mitigation solutions during their construction:
- Location for gathering of construction equipment shall be away from water current so that oil and lubricant being wasted or leaked out cannot go into water source;
- Setting up a temporary water drainage system around the construction site to prevent flooding situation, which carries dirty waste into the construction site and from the site to
water current; - Gasoline, lubricant and other fuel used for construction equipment shall be carefilly
maintained to avoid being spilled out or acts of sabotage. Meantime, safety regulations shall be carried out thereof;
- Fuel spilling out shall be immediately dealt with collection method, and oil soil shall
be removed out of the construction site to dumping site under instruction of construction supervision consultants after obtaining agreement of local authorities;
- Barriers made of corrugated iron fiberboards of 3 meters high bounding the
construction sites shall be constructed at residential areas in order to mitigate dust and noisy diffusion to the environment. The management of construction works and supervision shall be properly carried out.
- Set up working-teams to daily carry out hygienic clearance within the construction site to mitigate solid waste and construction material being scattered at sites.
- Set up plan for soil digging, soil banking and transportation by suitable selected roads
and means of transportation. - Delimitation of roads for transportation of soil, and set up timetable for means
carrying soil and sand, and mitigate dust pollution for those main points by making water
once every 2 hours as well as the construction sites at drying days. - Machines of big noisy and vibration making such as excavators shall be arranged to
work on daytime. To reduce to the minimum of working hours from 23PM to 5AM in the morning at sites near residential areas. In case of requirement for construction at night to ensure working schedule, it shou Id be agreed by local authority. Besides, construction of temporary barriers of noisy sounds and dusts for sensitive areas as schools, hospitals, medical centers, residential areas shall be carried out. Attenuation works of machines and equipment should be regularly carried out.
6.1.3.3. Mitigation measure for domestic waste
TO minimize impacts of civil waste prodi~ced during the course of construction, the following measures shall be carried out:
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VIETNAM URBAN UPGRADING PROJECT - NAM DINH URBAN IJPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
- No collective cooking fire to set up in the projected area, which is to control waste water and solid waste in the construction area;
- Solid waste produced by civil usage in the construction area shall be collected and reserved in suitable tanks. To engage in contract with the city's Urban Environment Company to daily collect such waste and move to treatment area.
- The construction at every area of each bidding package of the Project shall be equipped with 10 rubbish bins of type 100 liters.
- Solid waste produced by civil usage shall not be dumped or fired at the area.
6.1.3.4. Mitigation measure for solid waste of construction
During the construction, it shall produce much of solid waste as waste iron and metal, small pieces of wood and bricks, packages, glass bottles ... Those of solid waste shall hinder
the construction schedule, travelling and safety: - To limit at maximum level of solid waste produced during the construction by
calculating appropriate quantity of material for construction and regularly give warnings to
workers in respect of economic saving and tighten management and supervision of the
construction. - Waste being inert substances and harmless as broken bricks, redundant soil and sand
can be used for land filling. - Waste which can be recycled or re-used as empty cement package, bottles, redundant
pierces of ions .. . shall be collected, classified, and carried to regulated site of the City. - Harmful waste (lubricant, cells, batteries ...) shall be collected, classified and carried to
the dumping site of the City for hygienic treatment. - Install prohibition sign of rubbish throwing, use fence for isolation and arrange
guardmen to remind residents not to throw rubbish out to the site, etc.
6.1.3.5. Mitigation measure for oil residual leakage control
To minimize negative impacts of waste lubricant being produced in the construction, the following measures shall be carried out:
- Minimize repairing works of machines and trucks at construction sites. A maintenance area shall be temporarily set up and accompanied with collection system of waste lubricant
produced by such type of works. - Waste lubricant in the Projected area shall not be dumped but collected to suitable
tanks being placed in the Projected sites. - During the construction, each working unit i n the Projected sites shall be equipped
with one tank of 100 liters for keeping waste oil.
6.1.3.6. Specific mitigation measures for dredging, transporting and disposal of sediment from Phuc Trong canal, Bao Boi and Nang Tinh lake
a. Mitigation measures to nzinimize intpuc f s clurirlg dredging For increasing turbidity and pollzltant ~jispersion: Construction method during dredging is sectional: using bucket shall help reduce solid and pollutant dispersion in the canal and lakes.
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Offensive odor - Provide personal protective equipment to workers who carrying out dredging - Dredging plan shall be prepared and announced to local authorities and habitants in
construction areas at least 3 days before dredging. - The contractor shall ensure construction progress is timely, avoid extending construction
duration.
b. Mitigation measures to minimize impacts during transportation and disposal of dredged sludge - To minimize impacts during process of handling - transportation - treatment, the
following measures shall be applied: dredged sediment will be brought directly to tank truck, which shall be ready next to dredging site. The truck shall be cleaned whenever leaving dredging or disposal site. To avoid spillage during transportation, the tank truck shall be used. The tank shall be checked carefully, in case any leaks are found, they shall be repaired before mobilized to the dredging site.
- Avoid running through high density residential area or in rush hours. If necessary, divert
and regulate traffic in consultation with authorities. - While planning alternate route, care should be taken to avoid dense residential areas and
sensitive locations such as school, hospital or market, etc. - Signals and signs of reroute shoi~ld be provided. - Spraying water at least twice per day to reduce dust on the transportation route.
c. Treatment process: - Dredged sludge is proposed to dispose at the city's disposal site or at Nam Van landfill
(3km from the center city). Sludge will be layered at the site, then let to dry up. Volume of dried sludge could reduce up to 50%. The next sludge layer will be placed only when the
lower layer is dried.
Figure 6.1. Nam Van Landfill to be expand - The contractor shall sign contract with Narn Dinh Company of Urban Works to dispose
the dredged sludge at the Naln Van landfill The budget for sludge disposal shall be included in the contract.
- Leach ate from disposal cell shall be separated and conveyed to sludge leachate tank, it shall be pre-treated by lime before conveying to colnmon leachate treatment plant at the
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VIETNAM URBAN UPGRA DING PRO.IEC1' - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
landfill. For this purpose, at the bottom of each cell has facilitated a leachate collection pipe already, so it is easily to separated leachate from the cell. However, a tank to contain and pre-treat leachate should be constructed. The URENCO has responsibilities in construction and operation of sludge leachate tank.
- Sign boards for warning people kept away from the disposal site shall be raised at the landfill.
6.1.3.7 Mitigation of environmental incidents Based on the outcome of geological survey at construction area, the contractor shall calculate and apply reinforcement measures at holes, and banks of lakes (close to resident's housing) before carry out soil digging up and construction works. Workers at the construction sites should be trained with dealing solutions upon the occurrence of
incident. In case where foundation of resident's housing is sunken, cracked, the contractor s ha1 l immediately inform to local authority, and take necessary reinforcement measures so as to avoid severe damages in respect of human and assets. The contractor shall pay appropriate compensation and quickly repair damaged or being affected structures.
- Seriously abide transportation regillations and particular principles upon taking part in the transportation.
- Take the initiative action once the incident occur, and connect to functional bodies for
their co-ordination to settle the incident. This is to minimize damage level once the incident occurs (traffic and construction accidents,..)
- To equip with fire prevention and fighting tools as fire extinguisher of C02, water tanks
and holes near residential areas in order to timely give first aid to the incident settlement and prevent fire from occurring at construction sites.
- Periodically carry out maintain ace works for culvert lines and canals ....
6.1.4 Mitigation Measures during Operation Upon the operation, a large quantity of water mixed by rainy and waste water shall be directly discharged to the Red river and the Dao river. Due to no local treatment of waste water is applied, the allowed quantity discharged into river shall be in excess of Vietnamese standards 5942-1995 applicable surface water. This shall significantly decline water quality of the Dao river, which is the main supplying source of Nam Dinh city. According to Finland experts, it is a far distant of about 3 kilometers as from discharging point of Quan Chuot pumping station to the pumping position of raw water of Nam Dinh Supplying Water Company, and such distant is fairly safety due to the ability of mixing up and self-cleaning of water. However. the current construction of industrial zones and new urban areas as well as the population growth in future shall cause pressure for loading capacity of the Dao river. Therefore, on basis of the most si~staitiable and feasible principles, the consultant recommend the Project Owner to study for i~nplcmentation of several measures as follows: Before hand:
- Not pumping waste water to the Red river when river capacity is under average rate because the capability of river water's dilution is poor, especially, in sunny season when river capacity is under average rate. We recommend, at rainy season, the
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VIETNAM URBAN UPGRADING PRO.IECT - NAM DlNH URBAN UPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
pumping of waste water should be prohibited since 2016 in case the river flow is at
low lever. Waste water is only pumped to the river when river flow is higher than average lever. Meantime. the pumping station shall work according to suitable schedule and in agreement with Na~n Dinh Supplying Water Company
- Study plans of utilizing ponds and lakes surrounding the pumping station for preliminary circulation and accumulation before pumping into the Red river. Surveys have identified that there are many low areas near the pumping station (outside the existing dyke) which can be used for such purposes. However, it needs more carehl surveys to this issue;
- Management and monitoring program should be established and done adequately and seriously to find out and solve timely when the quality of water is change over prediction. Investment should be made to environmental monitoring equipment in order to supervise the quality of waste water before being pumped and the quality of river water at front and near water uptake point of the water plan.
- Regularly carry out dredging of lakes and culvert lines in order to improve the circulation and ability of self-cleaning of the uninterrupted drainage system after the
Project is completed; - Improve people's concept of protecting the environment, and stop dropping rubbish to
lakes and drainage ditches and canals; - Growth trees on the embankment and corridor of embankments and lakes to mitigate
the air pollution and improve scenery; - Set up operational schedule and ensure safety for drainage constructions.
Long term solutions: - According analytic results, the water quality of Red river is better than the water
quality of Dao river. Hence. the possibility of investment on raw water pumping station for the water plan from Red river at the point prior to discharging point of Quan Chuot pumping station should be considered for long term solution.
- The quality of river water will be decreased by time. Hence, to enhance self-clean process of waste water, households should be encouraged to build self-decomposed toilets, water keeping time in regulation lakes should be increased, industrial and hospital waste water sources should be treated in compulsory.
- In the long term, next 10 year, the City's drainage system should be delimited to each type of waste water including rainy and other sources as industrial, hospital, and civil usage waste water. Waste water treatment plan for whole city should be built to waste water meet standards before being discharged into the river. Waste water of industrial production, hospital, and civil usage shall be generally collected and treated by way of biochemical method at the City's waste water. treatment station before discharging to the Red river. For rainy water, the main issue is separation of SS by leaving it in the course of primary accumulation while moving along 10 kilometers of canal and then directly pumped to the Red river.
VIETNAM lJRBAN UPGRADING PRO.IEC1' NAM DlNH URBAN UPGRADING SUB-PROJECT Phmc 11 Enironmental Impact Assessment (EIA) April 2009
- Intensify the ability of searching capital sources for investment and construction of waste water treatment system which qualify the Vietnamese standards, before discharging it to the Red river and the Dao river.
6.2. Environmental Monitoring Programmer 6.2.1. Objectives of the environmental monitoring program
-Indication for the project implementation;
- Control impacts made by the project construction as addressed in the EIA Report. Carry out testing to the environmental pollution standards addressed to the Project during the construction.
- Check and supervise the implementation of solutions for environmental protection in the course of construction, which is on basis of the mitigation impacts solutions as basically addressed in the appraised EIA Report. To recommend supplemental and enhancement of mitigation solutions upon the occurrence of impacts or has not been forecasted.
6.2.2. Project performance indicators
A set of monitoring indicators is developed in order to assess the implementation at various project stages. These monitoring indicators are representative for characteristics of project activities and are feasible for collecting and analyzing based on the experience gained from similar Bank- funded environmental sanitation projects in Vietnam. These performance monitoring indicators will be set based on the final EA report, EMP and Project Appraisal Document (PAD) as well as the findings and recom~iiendations of the Environmental Monitoring Consultant (EMC) to be appointed under the pro-iect. Combined with other qualitative and quantitative parameters of project performance, these indicators will be used as a tool for impact / benefit evaluation and analysis at various project stages and will be presented in reports of the PMU and EMC
The PMU will prepare to DONRE and the Bank bi-annual performance monitoring reports, which will detail project progress with respect to agreed targets, including the agreed environmental project performance indicators on the following: - Contractor compliance to impact mitigation measures and ECOP. - Flooding situation - Wastewater and sanitation environment
- Com~nunity stakeholder participation
6.2.3. Monitoring implementation of mitigation measures
Monitoring duties of the Contractor, Construction Management Consultant (CMC) and Environmental Monitoring Cons~lltan~ (I:MC) will be specified in their respective TORS and Contract Documents, which are si~bject to Bank reviews and approval. The CMC will be responsible for submitting monthly progress reports which will provide specific sections on
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environmental issues, actions and monitoring results to date. Based on these monthly reports and site visit 1 meeting results. the EMC will be responsible for preparing and submitting
quarterly progress reports to the PMU, summarizing key environmental management and mitigation issues, results and actions to be taken. The EMC's quarterly progress reports will include the following:
List of priorities identified in last bi-annually monitoring report.
List of progress, which the Contractor has made to solve the problems
List of issues, which have not been adequately resolved and give recommendations how to solve the problems and explain force majeure
The EMC will provide needed technical assistance and guidance to the PMU and CMC to support their roles in monitoring implementation of required mitigation and reporting measures, including quantities of dredged and transported sludge materials, number of loads,
type of transport, measures to keep streets clean, fencing etc. 6.2.4. Monitoring Plan
The environmental monitoring program is carried out during 3 phases of the project: Phase before the construction (base environment); Phase of construction (planned to be in 3 years); Phase of exploitation (the first year upon the project is put into operation).
Responsibility of environmental monitoring and supervision belongs to the Environmental
Supervision Consultant, and being specified as table below
Table 6.3 Table of annual Environmental Monitoring Plan (location and number of sampling should based on the baseline data and progress
I I I Noise I
projects during the time)
Operation Phase Construction Phase TT
Leq, L50, Lmax
2. Frequency
4. Standards
Leq, L50, Lmax 1. Parameters
I I I
progressing TCVN 5949: 1998
Monitoring
Leq, L50, Lmax
0 1 locationiday, 03 ti~neih
3. Location
- ~ . n e t e r s SF, ('0. NO.. SO,. ;-I SP. CO. NO,. S O ~ ~ T S P . CO. NO?. SO,, HC 1
Preparation Phase
Baseline location (Figure 1.6) and the area where construction
Every 3 month 0 1 locationiday,
03 timeih
' r 3. Location
Every 6month 0 1 locatiodday,
03 timelh
I I I
I I
TCVN 5937: 2005: TCVN 5938: 2005
Thang 1,ong Infrastructure Development .loin( S ~ o c k C'onip;~nj (Inlra-ThangLong) 115
Every 6month 2. Frequency 01 location/day, r:very 3 month
VIETNAM URBAN UPGRADING PROSECT- N A M DlNH URBAN LiPGRADlNG SUB-PROJECT Phase 11 Enironmental Impact Assessment ( E I A )
-- April 2009
I I I progressing I
TT
1 111 1 Water quality 1 I
TSS. BOD, COD, TSS, BOD, COD, DO, , turbidity, t e y i *[--N. T-P, DO. oil, Cu, Pb, As oil. Cu, Pb, As Coliforrn,
BOD, COD, DO, Coliforln7 o i l Cu, Pb. As Coliform,
Monitoring
4. Standards
3. Location
Preparation Phase
1 2. Frequency
TCVN 5942: 1995: TCVN 5945:2005
Baseline location (Figure 1.6) and the area where construction
Construction Phase
02 samples at only one position (morning and afternoon)
Operation Phase
4. Standards
Every 3 month 02 sample at only one position (morning afternoon)
and
Positions of environmental base (Figure 1.6), Red river water (in back side of outlet of Quan chuot pumping station towards downstream, Dao river water (at uptake point of water plant), enclosing channel T3-1 1, Gia channel, Bao Boi lake (exact positions depending on project progress)
pH, organic, Cu, Pb,
I (Figure 1.6)
Every 6month 02 sample at only one position(morning and afternoon)
pH, organic, Cu, Pb, As
2. Frequency
-- 3. Location 4. Standards
6.3. Project organization for environmental management The proposed organization and relationship of the project's environmental management,
mitigation and reporting roles and responsibilities is presented in Figure 6.2. Detailed
functions, missions and roles of concerning stakeholders in this system are described in the
following sections.
Thang Long Infrastructure Developmcnf .loin[ Stock Company (Infra-ThangLong) 116
03 samples at only one position
TCVN 7209: 2002 and PEL Nam Van landfill, Bao Boi lake, Nang Tinh lake and Phuc Trong canal
Figure 6.2: Project Organizational Structure for Environmental Management of Nam Dinh Urban Upgrading Project
6.3.1. Project management unit (PMU)
The Nam Dinh PMU has the main respo~isibility of the implementation and monitoring of the EMP. In order to do so, a specialized and responsible cadre should be maintained for this purpose. The PMU will for~nally designate qualified members as their environmental staff, who will conduct environmental supervision during the course of sub-projects implementation to ensure that the EMP set out in the approved EA report is properly implemented. The PMU should work closely with cornlnunity representatives to promote the community participatory process in the whole process of the project implementation including planning, management, O&M and monitoring. Awareness campaigns should be conducted to the local people to make them aware of the problems relating to the components of the including, improvement of drainage and sewerage systems, roads construction etc. and their role in the project implementation process. Besides, the PMU shall also work closely with the Districts' and Wards' Environmental Officials in the management, operation and monitoring of the project. To ensure the compliance with tlie EMP. the I'MU shall supervise the implementation of mitigation measures by the contractors. The supervision by the PMU should include tile following:
Carry out monitoring of tlie project performance indicators related to environmental issues;
Carry out spot-checks to ensurc that the contractors are implementing mitigation measures a s specified in the construction contracts;
Review regular reports by thc CMC lo ensure the co~iipliance of mitigation measures;
Review reports by the EMC on overall environlnental impacts of the sub-projects;
Based on the above reports, rcport lo WB and DONRE on environmental compliance of the sub-projects as part of their bi-annually progress reporting.
Thang Long Infrastructure Devclopmcnl .loin! Stock C ' o ~ n p ~ n ) (Infra-'ThsngLong) 117
VIETNAM URBAN IJPGRADING PRO.IECT - NAh l DINH lJRBAN IJPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessme~lt (EIA) April 2009
The PMU should also maintain close cooperation with the relevant enterprises in charge of water supply, sanitation, solid waste collection, etc. to monitor the O&M during the operation
of the project. 6.3.2. Construction management consultant (CMC)
The main tasks of CMC are monitoring basic construction practices and procedures, including Environmental Code of Practices (ECOP) for mitigating environmental impacts as described in the draft EA. These tasks will be stipulated in detail in the Terms of Reference (TOR) for the CMC and contract with the PMU, both of which are subject to Bank reviews for issuance of a No Objection Letter (NOL). Under the guidance of the PMU, the main tasks of CMC for environmental mitigation and monitoring will include but not be limited to: a Coordinating and supporting the EMC in establishing, gathering and providing of
required on-site environmental monitoring and construction implementation information.
a Ensuring that all construction work are carried out in full accordance with the
approved EMP and related specifications and ECOP of the Contract Documents for mitigating and monitoring environmental impacts.
a Monitoring the implementation of the contractor's impact mitigation methods and providing any needed recoinmendations to improve these mitigation measures to satisfy project safeguard requirements for environmental management.
a Establishing needed contingency action plans for quickly and effectively responding to any environmental problelns. emergencies andlor damages that may occur during
construction. a Recommending to the PMU the suspension of any and all construction works which
do not meet the agreed / contractual requirements for environmental management and public safety.
a Organizing regularly held coordination meetings with concerned stakeholders to provide needed project information, imple~nentation schedules and work plans to enhance local awareness and to identify possible community problems and corresponding solutions prior to implementing the construction works.
6.3.3. Environmental Monitoring Consultant (EMC)
The EMC will be responsible fbr detailed design of the safeguards monitoring program in accordance with regulatory and procedural requirements of the GoV and the Bank. Following reviews and approval of the safeguards monitoring plan, the EMC will be responsible for monitoring overall project implcmcntation aclivilies and ensuring that agreed environmental safeguard policies of thc GoV and ~ h c Dank arc applied and monitored through the following responsibilities: a Ensuring that the approvcd 1;MP and all project loan agreements related to
environmental safegiiards are fully applied and complied during project implementation.
Thang Long Infrastructure I)evc.lopmc~ir .loill[ Stoch ( 'orupan) (111ft-a-ThangLong) 118
Ensuring that environment i~iipact mitigation measures are established as required for all project implementatio~i aspects within the project's organization for environmental management system, including: - Establishing and implementing environmental mitigation and monitoring measures
and tasks for the PMU, incl~~ding estimates of budget and/or staffing requirements. - Assessing the effectiveness of the contractor's and CMC mitigation measures to be
provided in thcir proposed mobilization / work plans and recommended to the PMU any needed improvements or modifications to meet the safeguard requirements.
- Specifying to the PMU any situations that may require further detailed assessment studies and/or local consultations to determine possible impact issues and corresponding mitigation measures.
Establishing standard procedures. methods and forms to assist the PMU and CMC to assess contractors' progres in implementing required impact mitigation and monitoring measures.
Assisting the PMU and its environmental mitigation and monitoring specialist to review and check detailed designs and related sections of the Contract Documents to ensure compliance with environmental safeguards and impact mitigation and monitoring requirements.
Identifjiing and establishing needed baseline environmental data and CEMPs in coordination with local stakelioldcrs (DONRE), PCs and community representatives to support monitoring of the project's agreed performance indicators.
Through the guidance of the PMU, establish and maintain close project coordination with the CMC to ensure that related environ~nental regulations, mitigation and monitoring measures and methods are clearly understood and integrated into the CMC work plan and reporting procedures, including appropriate criteria and procedures for recommending suspension of construction work when and where contractors do not comply with agreed environmental safeguard requirements.
Assist the CMC to prepare and to apply if required contingency action plans for any environmental damages or problelns that may arise during construction.
In coordination with the PMU and CMC, provide needed environmental management and impact mitigation assistance and guidance to the project's contractors.
Providing needed support and assistance to community representatives in the preparation and implementation of their CEMPs.
Assisting the PMli to establi\h and maintain the project's organization for environmental managcmcnt. mo~lituring and reporting system in close coordination with concerned agencies and local co~nmunities.
Providing requested assistance and support for the project's environmental training and capacity building programs in coordination with the PCs.
- -
Thang Long Intiastructure D c \ clopnicn! . I t~ i l i t Stock C'o~ilpun> (Infra-ThangLong) 119
VIETNAM IJRBAN lJPGRADINCi I'HOII C 1 WAM I)INIi IJRRAN UPGRADING SUB-PROJECT phase 11 Enironmental Impact Assessment ( E I A )
. .- April 2009
Support the PMU in conducting frequent on-site environmental monitoring surveys and coordination meetings \+it11 comm~~nity representatives during the construction works.
Provide general environmental guidance as requested by the PMU to enhance overall project implementation and performance.
6.3.4. Responsibility of the Contractor in environmental management
The environmental management is one part of the site quality management work. In the environmental management plan the Contractor will propose the necessary measures to
minimize the project impact to the cnvironment during construction and will submit these plans to PMU and CMC for revie\\.
However, the plans will bc reconsidered if any change in the legislation or proper
adjustment to specific site cases.
6.4. Capacity development and training The PMU and relevant bodiss (independent consultant for environmental supervision,
consultant for capability enhancc~nent of conlponent 6 Phase 11) should organize training
courses to improve understanding and experiences in management of environment. Participating to such training courses are co-ordinators of bidding package,
environmental officers, public colnm~~nity of the PMU, construction supervision consultant, contractors and local authorities at places where the project is implemented, and
representatives of people living in the residential areas. Depending on type of classes and the organizations holding training courses
(Environmental supervision consultant, or capability enhancement consultants), content of training courses shall be discussecl in detail m i t h the PMU so as to make it fit with scales and
levels, and the project schedule. Contents of training courses ;\re shown on the below table:
Thang Long Infrastructure Developmc~i~ .loilil 5~oc.k C'o~npan! (Infra-.l'l~angLong) 120
Table 6.4 Environmental Training Program
Course Participants
Frequency of training
Duration and type Content
- . .. - - -- - PMU
Environmental ~~~ monitoring a Person(s) in charge of environmental issues and related persons to environmental - management Once at thc beginning of the project, updating during the implementation according to .. t l ~ c nccd ~
One day Icctu~.e - -- -
Overall cnvi~,onmental management related to the project including r e q ~ ~ i r e r n ~ n t s of'thc W B and DONRE, co-operation with related authorities and ~.esporlsibilitic.s E~~v i~ ,onn~cn[a l ntonitoring of the project including structure, content, repol-tir~g.. timc .schcdulcs and responsibilities of the monitoring:
.J pro.iect perlormance indicators > ~nol~i tor i l~g o I' i~nplelnentation of mitigation measures
,-> co~nmi~n i& based monitoring cwcrall regillatory monitoring
Ciilida~~cc. a l~d supel.visio11 of the contractors and community representatives how -. lo . i~nplcmcnt . - - - - . environlnental . . - - . - monitoring
I{,~nl;. I>ONI<I:. I'MIJ. EMC ~ - ~ - - - - .~
VIETNAM URBAN IJPGRADING I ' I < ( ) II ( I '\A \,I I)INI1 IJRRAN IIPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessrnerlt (I<I.i) - - - - - - --
April 2009
- -- --
- - -. -- Contractors 1 in charge of the reporting to PMU
of each contractor, updating according 1 to the need. cst~lnated number of contractors about 10
- . - --- . -
Duration and type 1 2 d a y s ~ ~ c t u r e to the main contractors, submission of the examples of monthly 1 content 1 e n v i r o n ~ n e n ! g l - ~ ~ i ~ ~ ~ , i ~ f i n g ~ ~ p o r t s
Briefing of overall e~lviron~nental monitoring
I 1 Monitoring duties of tlic contractor according to the contract documents 1 Montllly ~nitigation monitoring reports: content, what and how to monitor, how to till tlic reports. sublnission o f the reports, responsibilities
1 1 Enviro~~mental 1,:u-t ol' the quarterly reports: implementation of mitigation (
Responsibility
..- -- . -
Participants Represcntatives of' \vorhcrs (group leaders) who work directly in the project colnponents
~- - - - -- . - -- . . . --
thc bcgi~~ning of the construction work, updating durii~g the
measures. ~ identilied .-- . problems and solving o f the problems PMU with - assistance . - . ot'the -- World Bank Hanoi office
I
i~nple~ncntation ~ accL)rding - -- to the need One day -- lecture ~ . ~ . and onc day on-site presentation
Briefins ol'o\/eraII salkty and environmental issues Duties ol'tlie w o ~ Ikers Safety and environmental sanitation management on the works Mitigation rncasu1.e.s to apply in the works Safety measures o n electricity, mechanic, transportation, air pollution HOW to resporld to emergency cases
- -. -- Workers
Responsibility PMU with ussist;~ncs -- ol'tlic ~ EMC ~-
.- . ~
Co~nrnunities
Course / Safetv and environmental sanitation
Participants
Brieling ofoverail e~lviron~nental ~monitoring Dutics ot'co~nmunitics Content a ~ ~ d type of observation during construction: water supply, drainage, dredging. roads. w l i i ivaste, dust, noise Content and typc 01' observation during operation: water supply, drainage, dredgi~lg. roacls. wlid \baste, dust, noise How lo mahc ant1 rccord on-site observations, examples on-site Mo~~t l i ly ll~iti;!alion 111onitorin.g reports: content, what and how to monitor, ho\\ to liII tllc lisporti;, submission of the reports, responsibilities
131lvi1.o11mc1ir;11 ~.isl\s d ~ ~ r i ~ l g ~onstruction and operation
1 I I<ccci\ i l l ? . collcciing~ and repol-ting on complaints from the residents 1 I < ~ J O I t In? to ~ ' h I I I
Responsibility ( PMIJ \ \ I I I I . I \ \ I \ I , I I I ~ ~ 01-z; LMC and 17.2 Consultant - Training for - parlic~lx\ro~! ~ I , I I I I I I I I ~ ( 1 0 ~ ~ 1 1 :ii~thorities and communities) and communication ca~np:tlgl~h) ,111cl M 01 Id 13.1111\ I la~loi office I - - ---
Thang Long Infrastructure Dcvelop~ns~l~ l o i l l [ ~ o i . L ( olnllali! (Inf'ra-'I'hangLong) 121
6.5. Budget requirement for environmental management, mitigation and monitoring A summary of the proposcxl budgc~.; li,r recommended environmental management, mitigation and monitoring ~iic;~sut.c.s is pl.cscnted in Table 6-5 for each of the following key EMP implementation activitics: • Environmental training: Implc~iicr~tcd lor the local authorities and communities to take
part in environmental nionitoring i 17.2 Cons~~ltant). • EMC: including costs ii)r ;.nvi~.cl;lrnc~~tal observation & analysis, for environmental
monitoring training and salary oI'! 11c consultant during construction process of phase 2 (Package 26 - E n v i r o n ~ ~ ~ c ~ ~ i a l rnoiiitoring for Phase 2).
a Environmental monitoring h!, 1.11~ ('onstruction Management Consultant (CMC) • EMP administration and rnanagc~~~cnt ~.esponsibilities of the PMU
Table 6.5 Estimatecl Budget - Costs for EMP Implementation (in USD) I I I I
--
Description I
-. - - - -- - --
p r o p o s e d Budget I Source of Budget I 1 1 I Implementation of Mitig;ilioli Mc:~sures I Costs included in Loan proceeds 1
I I 1 construction I I 1 2 1 Environmental Training 01' 1 9,000 1 Loan proceeds 1 I / communities, Contractol-, ( 'oust rsetiun I I I
I I 1 Monitoring Consultant i ~ l l t l l.eIi~l~tI staff i I I 1 1 of PMU (not trained in ~, l l ; isc I ) 1 - -. I1 I 1 2.2 Conduct training C~+- -
2.1
1 3 1 Samples observation and :iit;ll)~sis: I 41,000 1 Loan proceeds I
Environmental Training .- 0 1 C O I I I I I I L I I I ~ L I C S -- 1 -- 5,000
I preparation of environmc~r~,ll 111onitol.r r~g - I 4 I I
3.1 1 Preparation of reports ( I -i ~.cpo~.ts) I -1 19,650 1
Note: Monitoring cost is calculated following regulations in Circular No.83120021TT-BTC issued by Ministry of Finance dated 2sth September
Total of samples
Content of metals
Leq -
L50
L~nas
2002 regarding regulations on collecting, paying and managing fees and charges on quality measurement standards.
positions 7 6 60
300
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 124
Breaking samples
7
Content of sulfur diovide (CO:)~ 300 , 1 , 9
100
5 0
50
Amount
times 24
I
I
1
I
384,309,900 21,350
Total
positions 7
9
13,
VND USD
1 OOOVND
12 4
12
I
9
12
12
12
9
9
9
12
12
12
12
189,
4
4
4
4
56.700.000
9
9
,
9
9 =
189
i
189 L
18,900.000
9,450,000
9,450,000
56,700,000
VIETNAM URBAN UPGRADlhO I)l~ol, ( I l 4 b l 1)INtI IIRBAN lJPGRADlNG SUB-PROJECT P h a s e 11 Enironmental Impact A s s e s s r n e l ~ t ( I I \ )
- - .4pril2009
CHAPTER 7 PUBLIC CONSULTATION AND DISCLOSURE
7.1. Demanding of public consultation
During the course of car-r!,i~~g i.)ut the enbironmental assessment, public consultation is a basic condition to ensure public ~~cccptance toward the proiect as well as tolimit disadvantage impacts, and issues not being ~.cali\cd by the implementation team. In fact, if the community participates in the early stage 0 1 ' 1l1c project preparation, then it is able to build up a close relationship between the comnlilnity and tlie project, and they can give valued proposals for the project implementation.
Public consultation is p:wt or tlic environmental assessment in the Project. It is carried out in co-operation by tlie Pro.jcct owner, Designing consultant, Environmental consultant, local authorities, and residential co~ll~nunities in area being subjected to the Project. Outcome of such consultation shall be i~scci to asscss designing plan, and propose minimizing solutions, and espress the public's supporting during the course of carrying out the Project.
Based on this concept. allil ill accordance with regillations as stated at clause 8, article 20 of the Law on Environ~llcntal l'rotcction passed in November 29th 2005 by the National Assembly of the Socialist I<cpt~blic 01' Vietnam and took effect as of July 1'' 2006, and Circular No. 08/2006/1'T-H'I'Nlcl'l dutcd 8''' September 2006 of the Natural Resources & Environment Ministry providccl guiding on strategical environmental assessment, and environmental impact assessnlcllt. a n d environmental protection commitment, we worked for four days to consult public ol~inions of residents, being effected by the Project, and 2 organisations (the People Cloilinli~rcc at wat-ds and sub-urban wards level; the National Frontier Committee of ward) Oi i 7 \\arcls in Na~n Dinh city, Nam Dinh province.
7.2. Objectives of Public Consultation To understand opinions a~ld 11~1bIic care 1i)r the Project. especially those who are directly
impacted by the Project constrii~tion and operation. Based on this, public cares can reanably be settled during the course ol'scrting LIP the f'roject, and selection ofdesigning solutions.
Attentively listening to pilblic opinio~is and their caring toward the Project, in which direct impacts given to daily IiIc c~l'llic commi~nity will be specifically taken care of.
Settling conflictions, \~ l l i c , i l is ariscll among public proposals for environmental issues and delays in i~nplelnenting tlic i.ori~t~-uction sclledule of authority bodies.
Giving logical and lab 1\11 co~~lir~nation in respect of the authority's decisions in meeting reasonable demand of resident\. L ~ I I L ~ considering p~tblic proposal and the authority bodies.
understanding major clil'lici~ltics tllat residcnts living in area being subjected to the Project are taken care o t: .
7.3. Methodology The Project Manageme111 I I I I 11 01' Nam t l inl i city dispartched official letter No 127lCV-
BQL dated 24th April 2008 to I'ccq~lc's ('om~nittce and thc Fatherland Font Committee of 17 urban and sub-urban wards i l l l l lc ;II.c;~ (l'lia~i I>inli Phung: Quang Trung; Vi Hoang; Nguyen Du; Thong Nhat; Tran I li111y l i ao : Ngo Qu~.cn; Nang 'l'inh; Tran Dang Ninh; Cua Bac;
T h a n g Long Infrastruclure I)e\ clctl)111~.111 I i l l l l t S1oc1\ C ' O I I I ~ X I I ~ ~ (lnrra--l'hsngLong) 125
VIETNAM URBAN UPGRADIN(; lJl<O.ll C ' I r \ l / \RI 1)INbI IlRBAlu IJPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assesso~cnt (t.1 \ )
- - -- . - - - - April 2009
Truong Thi; Loc Vuong; Loc I la: Vi Xujcn: C'ua Nam; Ha Long; My Xa commnune), which enclosed with a summary rcpol~ 011 [lie I'r~jcct for consultation.
Meantimes, quick intc~ \ ic\\ s and i~ispcctions were carried out to several households residing along the upgradeil l i ~ ~ c s to understand their conceptions, expectations and
consultation toward the Pro.jc~t. Wol.lts ncre carried out by dispatching questionary sheets.
The consultant also o~.g~~~ii\ccl cu~lsultation conferences happened from 7th to 1 lth May
2008 with fully participatiorl 01 ' I lic I'M[), local authority officers, organizations and unions,
as well as households residing, iii ar-c.a bcirig subjected to the Project. The detailed information
of 4 cunsultation conference is as li)llowcd;
Table 7.1 Public Consultation - - .. Conf'crcnccs at the local ( No ( Time Datc (----Eacc ( Participation of representatives
I 1 -
from WardsICommune Pcople
Quang Trung
Vi Hoang
Nguyen Du
l'hong Nhat --
Tran Hung Dao
C'o~ii~iiit~cc of Ngo Quyen
Ngo Q L I ~ C I I Nang Tinh
-- --
10/0512001( f'coplc Co~limittcc of Vi
I
I Xu! cri M ,~rd
'Truong Thi - Lot Vuong
Loc Ha
Vi Xuyen
Cua Nam
Ll--l - A_ ( Ha - Long - Besides the par t~c~l~ar~ol l ol thc local authorities, there are around 40-
representatives of householtl~ ~s l )~c i r i I I~ , the aIIccted houseliolds in the project area.
7.4. Outcome of Public Consultation The Project Owncl- 4 c r l l S~l1i1rlia1.y I<cport to Ihc People's Committees and the
Fatherland Font of 17 ~~rbali allti S L I ~ ) - L I I . I ? ; I I ~ \V;II.JS in area being impacted by the Component 2 o f the Prolect. The report t i ~ ~ ~ r \ c t l 111ai11l! 011:
Baic contents of ihc IJ~.<,icct: I>ircction ol' lines. scale of upgrading and expanding drainage lines, and supporti~~y ~ ~ I I ~ L I . L I C L ~ ~ I ~ O I ' I I I C I'ri!ject:
Disadvantage impacts LO\ \ : I I . ~ rlic c~iviro~i~iicnt which may be caused by the Project Solutions to ~ninirnizc sllcll clis:~d\i:~litagc ililpacts which shall be carried out. Consultattion opinion4 : I I . ~ sl)ccilically no~ccl as lollo\\~s:
. . ~ . -
Thang I,ong lnfrastructurc 1)c.t C I ~ I ~ I I I:!I! I , , 111 \LOL.I, C ' O I I ~ ~ L I I ~ > (Infrs-'l 'hsnglong) 126
VIETNAM URBAN UPGR.I\I) lN(, l'l<Oll ( I NAhl I)Ih'I I I J R R A K IJPGRADING SUB-PROJECT Phase 11 Enironmental Impact A s s e s s r l ~ c ~ ~ t I I,:I .\ )
- - .. .. ...~ . .. . - .- April 2009
7.4.1. Consultation of People's Committees of urban & sub-urban wards
- Almost all the Peoplc's (:c~~iilni~tccs of wards being taken their consultation agreed in written to the Project (Anncs I ) ) .
7.4.2. Consultation of the National Frontier Committees of urban & sub-urban wards
- Almost all the Fatherlalltl I'onc o~ ' \~ar . t i s bcing taken their consultation agreed in written to
the Project (Annex D).
7.4.3. Consultation of residential communities in the area
- Almost all the people living i n the area agreed in written to the Project (Annex D).
(Name and their consulti~tion ~ I ~ c c t s arc stated in Annex D)
7.4.4 Generalization of corisultating opinions of local authority officers and residential communities i r ~ the area
Beside their unaninlousl~ :ig,rccn-lent to the constrllction of the Project on urban
upgrading of Nam Dinli c i l ~ -- Corripoaent 2 - Phase 11, people and authority officers of
the People's Committees and I':~rlic~.land I-on1 ol' 17 wards of Nam Dinh city also contributed
more opinions to help briliging. marc cfli-ctivencss to the Project implementation:
01' ~):~rticil~alion - - -. collcctcd -- ant1 integrated in the report I J'rr:,.gc~.sfio~gro~llr -- prrrticipfl_t~t to be integrated in the report
Existing narural \~rcncla~~ts described envit';nmental condition at their living
Thang I ong Intiastruclure I)c CIOJ)I IS I , 1 1 1 : \ l o k 1, C ~ O I I I ~ J I I ! (1nfr;l- I t~ i~ngLong) 127
condition. I ;II.C;IS. theit descriptions were incorporated in chapter 2 --- -- . -~
Idea collected 161. ' - I'akc care about sol~~tions for water drainage ofthe line design stage: + i i co~~nccring I lo11g i'hong l~lan street 'l'huyen due to street the - current Nguyen situation Trai lake of - flooding and Le
3
~ ~ I ' I c I . Iicu\ly rains occur. I'iic An ' I rach lake should be quicly embankment to
p~'c\.oit it li-om hcing encroached. - l 'hc I ' r a ~ l Ilang Ninh drainage lake which runs to An
I'l.;li11 I;ll.;c ( 0 1 ' C'ila [jac ward) should be joined to system of lc\,cl 7 .
- Construcl ciilvert lilies at both sides of Dien Bien street t'115111.c drainage condition and the environmental hygien
- l3cli)l.c carrying our the embankment construction of I : [;,cli 'l'liong lal,c and drains, it should be checked in detail 1::.,,:1~1sc rllc c ~ ~ r i r c I-esidc~ltial area of group No.8 of Loc \ ' ili)liy is C L I I . I . C I I L I ~ ciiscI1;1r~i1ig waste water to the lake.
Potential llnpact o l ' ; 11c ~~i:!juril~ ( 1 1 . pcol~lc i c , l \ part in group meeting accepted the project in rllc ~j;)rcntii~l inipi~cts. I lowcvcl.. there are several opinions as construction phase I',~!io\\ 1
- Alrhol~~ll construction shall be able to affect to their I)!t~i~icss iictivi[ic,s. tiicy I .C~ILIY accepted.
-- - I Iic otllcr opiliion i\ ~ acceting - to be affected within 1-2
VIETNAM IIRBAN UPCRAI ) IVO 1'I.t 1 C I h \ M 1)IUI I I 'I<I3AN I 'PGRADING SUB-PROJECT Phase II Enironmental lmpact A s s e s \ ~ i ~ c i ~ t ( ! I \
- -. - - April 2009
pc!.~od: I
1 - Currently, residents living near canal T3-11 have been 1 sl;i~lding serious pollution, and construction of this canal , . ; I -I( ulcl be carricd out previously so as to stop the p~lluting : \;11;~ltio11 for ~ c o p l e in this area.
- Thc citl \llould set LIP general master plan before hand to .:void oFsitualion where tlie construction of roads is already
1 co~~lpleted but do more excavation works for construction of I d~.:~in;~ge, electricity, and telephone systems ...
- Construction should be carried out on basis of zoning ! to avoid spreacling out works. Before carrying out the I i co~istr~~ction, . rcsidental - . ~.. people - should be noted.
Mitigation meas~r-rcs Vost of h~thitants agree with proposed mitigation I I I C Isures. 'l'licrc are several additional suggestions as follow:
- Ensure co~lstl.i~ction schedule, and technical I ~';l~'.t!~c'ters, and ~x~blicly inform to local people for their
;l\\';Ircness. Etilia~lcc tlie close relationship between the PMU ; I I I C I contractor and local ai~thorities to ensure public order, and tr::~lsport safety. Material for construction should be planed al-!,I closely manased.
- Ensure salkty fbr transportation, avoid traffic jam, ! ~ni;~imize nois! cl~~ring breaking time of people.
'l.akc c. L I I C . . ' I ~ O L I ~ . sitl~ations for local drainage while
. - I.. < I . : I 111) season to ;rvoid flooding.
- T'endcri~lg units should quickly clear refuses on ~iik:\ \ ;~lks after lllc day of completing their construction to ; I \ lid pollution. and take care about the time of transporting
I I
& . u L . i l I . C ~ I I S C S LO 111i11imize traffic jam and avoid making ill ; .:lets to 1,coplc's health.
- Waste \ \ ; ~ ~ c r tirainage system for people of Vi Xuyen :rn:i Vi I-loang \vard slioi~ld be taken care of upon seperating curi-cnt tlo\v f i ~ COIIS~I-~1ctio11 of drain due to flooding situation cr1!i easily be occurred.
I 'hose c o ~ ~ s u Itat ions were already selected and attached 10 ~l lc crlvironrncr~tal asscssrnent and mitigation measures of
-
cai:) in:: out tlic cor~st~~i~ctiori. and it should bedone before
7.5 Public dislosure The English version of I,:;\ I-cpc,l.r I ; 11' ~,li;~se 2 \ \ ; I , s~~l)l,osccl to be disclosed in Vietnam and at Infoshop (USA) on 30th April .!O(;.;.
The Vietnamese version ol ' c l ~ , l l i i \ rc1)or.L \\ 'a\ ~lihclosccl lrom 30th August 2008 at PMU,
Nam Dinh DONRE. Deci\ion Y o I 13.; tlatccl or1 _!X;X!ZOOti signed by Nam Dinh DONRE on
approval of the EIA repoi.1 (AIII~: \ i)) ;\ \ L I I I I I I I ; I I - ! c~t'cnvil-orlrnental impacts of the project is
expected to be disclosed L I I I-claiCcl ; ;11~ls O I I .i01l1 \IN i I 200cI
- - - . . . - . .-
Thang Long Infrastructure Dc\ ~ l c l l 3 1 l i ; 1 1 1 : \ 1111 SIOCI, ( ' o ~ i i ~ ~ ~ ~ ~ i ! ( l~ i f r :~- '~ ' l~angLong) 128
VIETNAM URBAN UPGR,\I ) l 'ucl l'l:0!1 ( I h \ \ h l 1 ) lYIl I ' l < R A N [JPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assesstt~cr~t ( [ - I . \ j
- - -- April 2009
CONCLUSIONS &
ItECOMMENDATION
Conclusions
- EIA report identified alltl c\olu;~ted allnost environmental impacts in all phases of the
project, from design phasc to consl~.~~ction and operation phases of the project.
- During EIA process. ii11p;l~ts are evaluated by theoretical formula and experiment,
statistical figures and expc~.icnccs ol'si~nilar pro-jccts. I lowcver, there is no evaluation method
which is not absolutely accuratc I ~ L I ~ only relatively quantitative method for impacts. During
project implementation process, it is rcqrcuired to make suitable adjustments as to minimize
environmental impacts.
- Almost impacts in ~~~-c-<on~rruction and consti.uction phases are temporary and short-
term ones surrounding the sitc in tlic city or. on transport alignments and landfills. The most
remarkable impact in constr~~clion phasc is dust and traffic jam.
- Impacts in operation pl~i~sc is potential and long-term ones. These are impacts on run-
off water environment of' Ilcd Ili\pCr and 1)no river. ol' Quan Chuot Pump Station. Although
these impacts were calcul:~tcil in ,Ict;~il, but thcy hllould be still monitored and observed
carefully after the operation 01' ( . ~ L I ; I I I ( : I I L I O ~ I'lrmping 5tation.
- Almost proposed ~~~i t ig ;~l io i i mcthocls of negative impacts and prevention and response
methods of environmental risks : ~ r ~ c i incidcnts arc cstrcmely feasible.. However, there are still
long-term methods which cscccd ;~llo\vcd capability oE the project owner such as approval on
additional capital source I'or completion of'all primary and secondary infrastruction works as
planning, construction ol' \\;15tc \ \ ,~tcr treatment plant for the entire city, consideration of
relocation possibility of uptal\c p o i ~ ~ l s ol'N:~m Dill11 Water I'lant.
- Contents of EIA 1.cport arc in compliance \\ it11 current requirements environmental
impact assessment of Victn;~ri~~~\o (;ovcrnmcnt as \vcll as lj'orld Bank.
- The project of L I I . ~ ~ ; I I ~ ~~l) ;! l . ; ic l II~:!. 01' N ; I I ~ ~ l)i11li c it!. ('omponent 2, Phase 11 is a feasible
project and in conformity \ \ i l l1 1Iic p la~~ni i~y ori~.iitation li)r. socio-economic development of
Nam Dinh city, and satisl) dc-I 11a11ii \;)I. tlic. ~icccl ol' tlcvcloping socio-economic conditions in
the area as well as improvc tlic. ~ I I \ ~ ~ ~ O I ~ I ~ I C I ~ I L I I I C ~ I I ! , ~ C I I ~ C l i \ ing conditions of people.
-. - - .- - -- - Thang Long Infrastructure Dc\ c l o l ~ ~ ~ ~ l . ~ ~ t l o 1 1 1 1 \ I , I Z L ~'011111,111! (It~l'r;~-'l hanglong) 129
VIETNAM URBAN UP(;RAI)IN(I 1'110.11 c I h . \ k l Dlhll 1 '1:1\,2\ (IPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assess~nrl~f ( Is:lA)
- -- - -- - April 2009
- The Project construction mislit cause some clisadvuntage impacts on society, and the
environment in case where ~1ie1.c has no solurions of co-ordination between the investment for
operation of transportation ccr~~stri~ction and the M:~ster I'lan, which sets up limitation of
impacts on the society and [lie cnvil-onment.
- By carrying out prin~ilary analysc o n tllc collected environmental data, it is clearly
shown that canals, ditches. a~icl lalich in arca being sub-jected to the Project appear to be
polluted. Therefore, water quaiity 0 1 ' tliesc canals. dilclies. and lakes shall be improved once
the upgrading works are carrictl out. 'l'lie improvement of water quality helps minimize risks
of taking deseases caused by \\atcr sources and i~nprove health of people living along canals
and ditches.
- The Project Owner slii~ll seriously carry out plan of mastering pollution as stated in
this Report in order to satisf! [lie \'ictnamcse Standa~ds on environment. Plans on mastering
pollution and curbing disadva~~tagc impacts of the Prc!iect to the environment being presented
and recommended in the I<cl;ort alc ol' fcasihilit!. and can satisfy requirements of the
Vietnamese Standards on I , I I \ il.onrncnt.
- Program on environmc~~~al ~nonitoring shall hc imnicdiately carried out after the State
give its approval and license lirr coris~ri~ction and operation. Monitoring data shall be filed and
be legal basics for the implcmc~~talicr~i ol'tlic l,a\v on I nvironmental Protection ofVietnam.
Recommendation
During project implemcntatio!~ proccrr. I'M0 rcqu:>ls Nam Dinh People's Committee to
instruct related department\ c~ricl local administrat~\c agencies to provide coordination during
project implementation.
In land clearance and re.\ettlcnicnr, PMU need ~ l ~ ~ p p ~ r t and coordination of PCs and
Fatherland front at wards and c'o~ii~iiii~ics in prqjecl arca and functional agencies in order to
soon have land for project e s c c ~ r t i o ~ ~
In environ~nc~~lal protection: PMlJ rlccd coordination, support and opinions
of Nan1 I l i n l l I)cpa~.lriicnl o f Na~ural I<csource and Environment in order to
have good ~i~.~.li)r.~n;~rlcc cluri~~y. p~.c,jc.ct i~iiplementation. Simultaneously,
Nam I ) i r ~ l ~ ' \ l )OP;I( l . : is ~.cqi~cs~ctl 10 ha\c strict management. Production
and medical 1l:iscb. i~i~lu.\rri:tl / O I I ~ \ ~liall have separated sewage treatment
system \ \ l ~ i c l ~ 11icel\ s1~1ndal-d hcli)~.~. ciiscl~arging into the common drainage
system ol'ilic' city.
Thang 1,ong Infrastructure L>c\ c l o ~ ~ ~ ~ i i ~ ~ i t .I,li111 ~ I O C ! ~ ('o11111,111! (!~~f.r;t-~l' l~;~ngLong) 130
VIETNAM IJRBAN U P G R A I > I ~ ( I IJ110.11 ( I N 4 M 1)ISI I I I:l\.\N LIPGRADING SUB-PROJECT Phase I1 Enironmental lmpact Assess111rr11 ( 17IA) - -- - April 2009
For traflic sxlety: PMU need coorilination and support of Department of
transportatio~i. Trallic Policc, local authority to solve traffic diversion and
traffic jam.
For dust clccr-easing and site clcariing: I'MU need support of Nam Dinh
Environ~iient:~l Cornpany during irnplcmentation process.
During prolcct operation procc45: I'MU need support and cooperation of
water suppl! colnpall! i11 rnoni tori ng water source quality in combination
with operation of o i l a n Chuot 1'~lmping Station.
PMU requests authorized agencies and WB to give approval for additional capital source for
investment for construction of' l~ri~iiary and secondary infrastructure system in
;I l~'lllllCI1t~. synchronization with planncti I.,
PMU requests authori~cd '~ycncics to soon have plan to find out capital source for
construction of sewage treaLrnc'11t \tiltion for the I\ holc city.
r h a n g Long Infrastructure DL'\ cIo~)111cnt Soilit \tach ( . ( I I I I I , ~ J ~ ? (III( .I .~I- I I~angLong) 13 1
VIETNAM URBAN UPGRAIlIN( I PROJEC I - NAM r)INtI I 'ICH I N I IPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessn~cnt (EIA)
- - - -- - - - - - - April 2009
ANNEX
Thang Long Infrastructure Development Joint Stock Comp;tn! (111l'r-;I-'l'l~anglong) 132
VIETNAM URBAN IJ'PGRA!)IN(I l'ROJE('r N A h l I)lnll 1 R11.4N UI'GRADING SUB-PROJECT Phase I1 Enironmental Impact Assessl~~el~r (EIA) - -- - - - - April 2009
ANNEX A ENVIRONMENTAL BASELINE DATA
Table I. Aver i~ge temperature o f N a ~ n Dinh city r - -- --
I Average I 23.8 I 23.9 I 24.4 1 I
- 'fable 2. Lluu~itlity -- ol' t l ~ c - h a m .. -- Dinh city \';due ('%I)
Month -. --
Thang Long Infrastructure Dc.\clop~ncnt Joiri~ Stock ('01111);111!' (l~~l't~i~-'J'hangLong) 133
80
1 I A p 89
89
8 5
82
8 1
80
87
78
I X? 8 3 _ _ / _ _ _ . . .
2 I
S7 -- , -- 1 . ~ - -
3 S 5 8 7
7 S 1 8 1 1 8 1
. ~- . ~
4 8 0 88
5 82
6 1 .-. . .
77 .- . -
7 8 .; I 8 1 - i . . 1 -
8 SO I S 6 - . - - .- -
SO ! s5 .
~~
S Z I s3 .. . . / - .
So..l I
I . - 7 7 - -
Average 83.0 . -. ~~ 1
83 - -
8 3
78
83
~.Yource. A'CII,I /);,,/, ~ Y / o i ~ ~ / ; c ~ ~ ~ / )~~~II./Ioo~, 2006)
VIETNAM URBAN IJPGRAl>l h( I'ROJ).( I NA hl I )lhl I i 'R114\ IPGRADING SUB-PROJECT Phase I1 Enironmental Impact A s s e s s ~ ~ ~ c l ~ t (EIA)
- - - -. - - - - April 2009
Table 5: Itcsult o f moniturcd \v:ltcl- of lalie in Nam Dinh, ..- . -. -
Note: (Source:Report on the ci~l.~ronnzetitd . s / c l / ~ i . v c!/'&~rrir Diril~ 1 1 1 2006) - - NI : Vi Xuyen lake (main errli.rrnce). - N2 : Vi Xuyen lake (infr.on/ c!/ I-'~.ovitwitrl S I I ~ P I . ~ ~ I ~ ~ ~ / J ~ ~ ) L I ~ . / I ~ I c , H ~ ) (2ofi2533"N; 106°19'18"E). - N3 : Truven Thong lake (iii/oii/ uj'TI71y 7iilh I . L , . Y / L ~ I I I . c I / ~ / )
VIETNAM UKBAN UPGRA I)IN(; I1f<OJE("I .. K.4i-4 I)INl I I ll<RAN OPGRADING SUB-PROJECT Phase I1 Enironmental Impact A s s e s s ~ ~ ~ c r ~ l (EIA)
- - - ..~ -- . - .. . - . .- .4pril2009
N 2 : - N4 : Kenh Gia pumpir~ s!u/i011/20023'j(,".\!; lO~OIO'.?.?1:"). - NS: Quan ~ h l r o t (20026 2j '',\'; l 0(j1'12 ;'.! "I:i - - N6 : Loc Ha brighte (PIIII Ai::l,itl ROLICI) (3(~136'2-/"hi: / / l ( i O i 1 ' l f i"E) . - N7 : Truyen Thong lake (130"-7.5 ./A'"N; 1 !)/," 10 IVn/:'/ - N8 : Hoa Xa industry .yorrc(2002-/'3-/".h'; /OfioO!,'/.i"I:/
Thang Long Infrastructure Dc\ .c l~ , l )~nc*n~ .1oi1,1 S I I , ~ ~ ( ' o I I I o ; ~ ~ ~ ! ( ~ n f l - : t - ' ~ . i ~ i ~ n g L o n g ) 136
VIETNAM URBAN UPGRAT)IN( i I'RO.III('I K A b l [ ) I V l I I I l<RAN I IPGRADING SUB-PROJECT Phase 11 Enironmental Impact' Assesss~cn~ (E l ! \ )
Table 7. Undergo~~r~ t l water. qui~ l i ty of Yam Dinh city
Parameters
TCVN
5944 - 1995
. . .. --- . .~ . . ..
I Value
6.5 - 8.5
300-500
0.1-0.5
Unit
-- . . ~
PH i 1- .- - .
I
~ -
'1-1'13 ~
7.6 -
Hardness : mg!l .- - ~ i ~~ . 250.3 .- ~~
Mn 0..3.3 I j I n1g/I I
1-5
.~
Fete j m g / ~ 5.1 .-I-. - . .. .
7-1' 1 4 -
7.2 ..
TP15
7.35
I S2.5 ~
0.4 12
40.05
0.67 ~
0.02 - .
6.4
NO^- I mg/l i 5 i - .-__ 1 . - - - . .
CI- i mg/l 308.3 i
-,- - I - - ' -
sod2- mg/I I9 !
- . i ~ . . ~ C u 1 mg/l / 0.018
Pb - 1
lngii I +- - . - - 1 . - . -
5 8 - -
177.5 -
0 O -- -
0.037 ~
-
0.0057 ..
I -- -
it, 2006)
As
Colifor~n
mg/l 1 0.0067 - - . - -- ..
MPN/1001nl I 0
19
. . - I 1 . on the envir-on/net~[ul st~//~, .v r! f i.lirir~ l j ~ i ~ l ,
730.75
28
0.013
0.0396
0
200-600
200-400
1
0.05
0.05
3 1
VIETNAM URBAN UPGRAl)lNCl IIRO.II ( I 2 \ h i 1 ) 1 \ I I I I R B A h i'I'GRADING SLJB-PROJECT Phase II Enironmental Impact A s s e s s ~ l ~ e ~ t l (EIA)
-- -- -- Aprrl2009
'I'able 8 Air s i ~ a ~ p l i n g Narn Din11 2006 I--r --
1
NO
Parameters
1 To
2 Humidity %
3 TSB
4 NO2
5 co 6 SO2
7 co2 8 Noise
( ~ o u r c e : ~ e ~ o r t on the environ,n~.nfal stalli.v ofibror,7 Dinh in 20061
Note: - - K1 : Cross road Truony C'lliirlr and P l j~ r :V,ylrirr (20"26'03"hr, 106'1 1 '24"E). - K2 : Nam Dinh textilefac/o1:1~/-,0"2-/'SH";\~. IOfi"lO'32"Ej. - K3 ; Nang Tinh crossroud (.?(if'2./ '50"h'. 106" 10'21 "6). - K4 : Nam Dinh bus termi1irrl(20"2j'29"!\', /06"OO'S(i"lJ).
Thang I*ong Infrastructure f)c\.clopn~cnt .loin1 \ L O C I \ C ' ~ I I I I ~ , I ~ ) (1nfr;t-'I'llangLong) 138
VIETNAM UREAN IJPGKA[)IV(I I'ROIt C I \ :hl I ) IU t l lrRB,\N LII'GRADING SUB-PROJECT Phase 11 Enironmental Impact Assessale~lt (EIA)
22 Average river cross-section \\rid111 11-1 700+ 800 - - - - - - .- -. . -
Table 11: Water quality of Dao river and Red river
Source: EIA report - S1/h-c.oirl/,or7c~r7/ " I I ~ \ Y ~ \ / I I I L J I I I and cor7\/rucrion water pumping station of- spillway channel arid bell cllr~t~nel irl irol-//~cr. h[i.\~ii ofNrrrn Dinh City" - April 2004.
No.
Thang Long Infrastructure l)c\ c l o l )~~ i cn i Join1 S ~ r ~ c l , ( ' o ~ l i l ~ ~ n > ([II~I.:I-'I 11;111g~ong) 140
year 550.028 159,603 198,910 / 133,936 25,242,976 158 127 188
Thang Long Infrastructure Development Joint Stock Company ( Infra-ThangLong) 142
-- ;Ei: - ~ PI
.- I.-. - - -
"I: ? ;!I '" - 9 ,.I 1 I I
-. I-. . 1
E l i E -~
011 WI ,+ E 2 " P ,. -?\s s J = g
01) 3 ,g ._, .-
> ; Oil
1 I)isosdc.ring c'oct'licicnl 1 1 I - e '
( I . ' L I ~ I ~ L I I J 01. \. ..\. l~so lo ;~ id 1.1). i
1 ,. -. Rosinle) -.
130115 conc'enrl-a!ion of I Ilo\\ Si . ~ ~ ~ -~~~ ~~~ ~
, c " ~ i c ~ ~ ! d ~ i o t ~ ~ ~ ----.. ~-
mgll -~ ~ ~ ~. . ~~ - - . 158 i --~
I'ollo\\ in? I~iglicst ralc 01' 13OD5 o n i I 0 I h 16 1 I , i 1 ( 1 i \O!I? :o!~~c!-,i~..:;:o:- ,,: : 11 2: \,\A;<:. Y;. l)i:o ; \ c:- !:I g. 1 i h I . - - - ~ ~ ~- ~ . ~ -- . ~ - - ~ ~- I (1
Table 14: Average water quality in year at water collecting point in Dao river & increase rate of BODS compared with initial river water in rainy season
Qucd ri\cr
Q ~ a o nver
B t b R e d n r e r -
1 ~th.Dar , n t e r
\ \ cragc. \\atel- Ievcl 'Folio\\ ins h! drographic;!l J a t ~ 111 - - -- -- - --
Way of calculation Average volume of waste water
Average volume of Red river
Average volume of Dao river
Average width of Red river
Average width of Dao river
Unit m3Is
m3Is
rn3Is
m -
rn
The year 2012
16
440
The year 2013
16
440
The year 2014
16
440
I < i \ cs hotiom clc.\.atir)n ; ~ o l l a \ \ , i n ~ h!,d:.ographical data / m --. -0.71 -0.71 -0.71 -0.7
. I It6 ;I\ \ er~lgt. depth 01' lie\\ I m , 0.46, 0.46; 0.46, 0.46 I . \ \ cragc \ clacit! o ! ' i ) ~ n l.i\ ci \\atcr /~ : : ,=~ . - i ( l~ . : . \ l 3 . . ) .~ ~ ~ -- ~ ~ ~ -
1 mls 1.131 -. . i l 3 l I l i ! 1.13
-0.24' -0.24 -0.24 -0.74 .-0.241 -0.24,
The year 2015
16
440
- 0 7 -0.7 0.46; 0.46
l l 3 l 1.13
103.75
500
200
-0.7 - 0 7 - 0 4
U,-LGI O.4OI 0.40j
I l l ! - I l l 1.131
-0.24
I I <
I
\ \ L?,:<c \ <ic1 , L i . \ ' , I c~!.I<cd si\ CI- \\,:tcr \',,.=(J:.J( I I : - \ l j . . . I m;s , ~ ~ - - I ~~ . ~ - 1.91' -- . - -. ~~ 9 ~ - - 1.911 ~ .- - I ~ . O l - ~ . 1.91) .- I . . ~. . .~ I . ~ . ~ ~- 1.91; . - ~ . -~ ~ ~
i V , , .H ,, E = 1 I I I i I l'!o\\ cociicici~r I : 200
~. .~ ~ - . - ~- ~ - .- ! 0.1044 .- Olil44! OOOi4 11.0044! O.Ol144 O,OO44! --- lillU44i U.OO-l4; 0.110-141 ! 'Distance between outlct and river I L R ~ ~ t i \ c : crossing - rn 1340 1340 1340 1340 1340 1340 1340 1340 14
i~is tancc bct~\.cen river crossing to \\.ales I c(:]tcc;i;:!A . T , , ' . - , 1 I:: , 3 4 0 ' ?:I0 I 3340 3340
'l'irne for \vatu transport from ri\,er crossing to outlet Ilen_eth/velocitv ! _ 2962) ~ 29621 29621 2962 .. - . 2962 ~ -- 2962 - 2962) . 2962L -- 29621 .- - -
The year 2012
I
0.297
0.9524 -. --
The year 2013
1
The year 2016
I
0.297
0.9524
I ~ I L L I ~ L ~ I ~ I C 01 \ \ aLer I I . ; : I I > ~ O ~ L I'RIIII
The year 2017
1
outlet to water collecting gate on /Dao river !Water quality at water collecting point on Dao river
BOD increasing degree compared with initial river water
0.297
0.9524
0.042
19.36
3.36
20.99%
0.042
18.78
2.78
17.37%
0.042
19.21
3.21
20.08%
0.042
18.92
2.92
18.27%
N= No
Calculation following concentration
Calculation following percentage
day
g/ml
glml
Yo
0.042
19.07
3.07
19.1 8%
0.042
18.57
2.57
16.06%
The year 2020
I
The year 2018
1
0.297
0.9524
The year 2019
1
0.297
0.9524
0.042
19.79
3.79
23.71%
0.042
19.50
3.50
21.90%
0.297
0.9524
0.042
19.65
3.65
22.80%
VIETNAM URBAN UPGRADING PROJECT - NAM DINH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009 Table 15: Average water quality in year at water collecting point in Dao river & increase rate of BOD5 compared with initial river water
in dry season
\ \ c:;:!!< ,>$..':<! I ? \ c! - ....... . . . . - - -- . - Il-'o!lo\\ in: li\.drographica! data / m 1 -0.211 -0.241 -0.341 -0.211 -0.241 -0.241 -0.24 l i i \ cr ho~torn clc\ ation -- -- ~I:ollo\ving h j drograpliical data nl -0.7 -0.7 -0.7 -0.7 -0.7 -0.7 -0.7
I fltb I ~ v e r a ~ e depth of flow nl 0.46 0.46 0.46 0.46 0.46 0.46 0.46 7 I
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 147
. \ \ Csasi' \ i~ i~~c i ! ! 01.R~ii . . r i \ cr \ \ -a~er / \ ~ : , = Q ~ ~ : ~ ( I I ~ ; \ B ~ ~ ) - ~ - - - - . ~ ~~
I v .H I ! i i I
I E - '1: 11,
;Irlo\\ coclicicnt I < I 200 T- ' ~ i s ~ n n c e bct\\peen outlet and r i \ w
I ,,
-0.24'
-0.7
0.46
- - -~ . . ......... . . .
-0.24
-0.7 0.46
.. ICTOC.iR9 . ---- ~ . -
m -- ~-
Distance betivce~l river crossing to \cater' iL~aor~\ec . -A
Conversion of equivalent length Dao river LHone river
collecting point -- m 3340
- ofL,,,, ,y,,,,g - L ,,,, 9612
10952
2400 Distance from outlet to water collecting following straight line
ANNEX B Picture of process on survey, site visit and environmental sampling in Nam in city 2008
Survey on My .Ya Survey on Phuc Trong canal area
Water s a m ~ l i n ~ Sedi~nent sam~l ing at Bao Boi lake
Air sampling I l lc I I I ; I I . I \ ~ . L \ i r sampling at the street
- .. Thang Long Infrastructure I > c \ c l o l ) ~ ~ ~ ; n ~ l o ~ l i l .>,oc.l, ~'oriil~,~t,! (~ttl'r;t- I i~;ttig~,ong) 149
VIETNAM URBAN I JPGRADING I 1 R 0 I l C I h,\lvl D[NH [TRRAP (IPGRAI)ING SUB-PROJECT Phase 11 Enironmental Impact Asscssrne~~t ( E l \ )
- -- - -- -- -- - -- April 2009
Sitc visit
An Phong Open-canal(Muc ?l'Iii I 3 ~ 1 o i )
huc Khang road (Hang Thao- affected by flood)
calla1 cc ~lneting An Trach and Bao Boi
workingwith the responsihlc person at Nam Stabil, ; ~ i pond in Nam Van landfill Van landlill
- -
Thang Long Infrastructurc i)c\ c l o ~ ~ ~ ~ i c ~ i t . I o ~ n \ '5ioch ('olnl>an) (lnft-;~-'i . ; ;~ngl ,ong) 150
VIE~AMURBANUPGRADINC,I~[<O.I1( I \ \MDIY1111RB4b I'PGRADINGSUB-PROJECT Phase11 Enironmental Impact Assrss111c111 (E l i \ )
- - April 2009
I'icturc 011 I'ublic Consultation
Public Consultatioii at Thong Nliut \ \ !ad Thong Nli:tt, Quang Trung, Vi Hong, Phan Din11 Phung Phung, Nguyen Du
- -
Ngo Quyen, Tran Hung Ilno, N a ~ l g ~ 1 in11 I'l.uong f ! . CLICI Bac, Tran Dang Ninh, My Xa Ward
Truong Thi, C L I ~ Bac. 1 I . L I I I i);111!, 21, I ' , I , V i Xu!c~ I ,oc I la, Loc Vuong. Cua Nam Xa \\/;11tl
-- - . - - . -- Thang Long Intiastruclul.~ I)c\ C ~ O ~ ~ ~ I I C I I I . I r l f : ~ : \ic,cI\ I'OIII~~III! (III~I.:I-. i~:~ngl.ong) 151
VIETNAM l JRBAN CJPGII \L)IN( I I'RO.11 t ' I - h',\l\l DIN1 1 I JRBAh I ll'<il<ADIYG SIJB-PROJECT Phase II Enironmental Impact Asscssli ir~~r (E l / \ ) -- - . -- - - April 2009
ANNEX C Generic mitigiltion - -. uleasllrcs - E ~ ~ v i r o ~ ~ m c n t a l < .)rle of Practices (ECOP)
-7-- - - -- 7 1
Codc + Mitigation measures All vehicles and machinery
Dust
) Solid waste manageliienf
t ( ' over transportation vehicles ( to avoid dust, soil and I material scattered during
-. - 1 Temporary disruption o f - - I drainage
1 construction area bf the oullct
Temporary disruption electricity
Loss of trees and vegetalion r - Loss of agricultural land 7 Health sand Safety i
shall have register of quality Not to let equipment operate
of structures before
the site
) transportation Clean vehicles before going out of the site t ~ ~ e g u ~ a r spray water, twice
I'rovide dust bin at the site t pe- 1 and contract with URENCO 1
to collect solid waste dail Schedule construction t -i
I i~ctivities with the Drainage I
- - - - - - - construction 1102 t we11 manage --l wastes
-- --- generated 1: 1 t Avoid to extend construction
activities with the Electricity L('ornpany (EC)
solnpletion of Works ('ompensatory affected
I'rovision of emergency aid -P'=-------i scrvice insitu
t clangerous warning slgns I .imit speed of vehicles
I I
L I 1 . - -- - - -- 1 \\i$in the site
V I E m A M URBAN UPGR;\IlIN(i IJI{O.lI:(' ! - N A h l DlNH [!l<BAh ( 'PGI<ADING SUB-PROJECT Phase I1 Enironmental Impact Asscss~ l~cnt (El . \ )
- - - - - - - April 2009
Management of market
-
Code
I rush hours I
Mitigation measures Avoid transportation during
Provision of temporary crossing across the sewer
are provided for illumination Provision of Personal
I Protective equipment to 1 Avoid to contact in long. time ers ---i
1 Train workers on safety 1
I necessary support method to I -
- -- -
416 - - --- b17 - - -- X I S
regulation Calculate and apply
Wastewater at the site F -
Contaminate of wasewalcr lo
Wastewater
avoid landslide In case of accident, stop construction and take necessary recovery measures Consult with Ward's PC to provide a temporary place for
I and toilet I Contract with URENCO to collect solid waste daily Ventilating shaft are located in such a way that not causing pollution to nearby houses
E G Z a r cleaning of facilities I 1 Provision of fire horse I
Train staff of Market PMU and businessmen on firefighting Provide mobile toilet at the site Clean toilet daily Used tank truck for lransportation 1)isposed dredged sludge at
and rectified upon discovered - -- --- Connection to sewerage
-. - . . -.
Thang I,ang lnfrastructi~rc Dc\ c i o l ~ n ~ , . ; ~ : .loin: <[ocl, ~ o r n l ~ a n ! (infr;~-'l Il;~ngi.ong) 153
VIEIAAM URBAN UPGRADING PROJECT - NAM DINH URBAN UPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
water supply I Issue/ Impacts
Temporary disruption to
1 Disturbance to public I
Code WSC
I Disturbance to businessmen / PC2
Mitigation measures Schedule construction activities with the Water Supply Company (WSC) Inform construction schedule to Ward's PC and community Inform construction schedule to Ward's PC and business in advance
Damage to road/ alley surface
Damage to road and bridge
I --
Temporary disrupt ion of Utilities
Damage to road and other utilities
and bridge in earliest time Reinstatement of road surface
R 1
R2
R3
R4
RB 1
RU I and other utilities in earliest
Not to discharge water to roads/ alleys Not to cut off roads/ alleys surface, at least 2 years after surfacing of the roads1 alleys Forbid vehicles that are heavier than design load to access Construct synchronically with roads/ alleys and other utilities (if any) Reinstatement of road surface
time Schedule construction activities in consultation with the other utility agencies
Thang Long 1ntiastructu1.e Development Joint Stock Company (Infra-ThangLong) 154
4. Contents of the meeting: - 'The PMU introduces about objectives, and social meaning of the public consultation
session in respect of the environmental impacts causing by the Project; - The consultant presents about the Project of Urban Upgrading of Nam Dinh city,
Component 2, phase 2; - The consultant presents potential environmental impacts caused by the construction
and installation as well as pollution mitigation measures; - Discussion a b o ~ ~ t issues of the Project, and its environmental impacts and pollution
mitigation measures. 5. Opinions of local authority and representatives of public community
Opinions of local rrutl~ority
Representatives of tlze People's Committee of Tran Dang Ninh ward - Agree.
...................................................................................... Representatives of tile People's Committee of My Xa wrrrd - Agree; - Propose that the Project prolong construction of drainage system from Giai Phong
street joining with that of Nguyen Trai street to alley No.3 of the ward.
Opinions o f representatives o f public conlmunity Ward: Cua Bac Contributor (surname): Vu Thi Hong - Culvert lines in Dien Bien street is incomplete; - Agree to the Project.
Ward: Cua Bac Contributor (surname) Vu Xuan Quynh - Agree to the Project; - Upon implementing the Project, ditches and canals slioud be of suitable depth in order
to avoid flooding situation.
Ward: Truong T l~ i Contributor (surname) Nguyen Van Bach - Agree to the project; - Joining positions of drainage system should wider; - The Project should bc implemented as soon as possible.
Ward: Tran D L I I I ~ N ~ I I ~ I Contributor (surnarnc) I'li~l~n Xuan Co - Agree to the prqjcct; - Propose the Project to construct reservation area for drainage; - Some people living in the ward propose the City's Rubbish Company shoud collect
fee for wastc wntcr on basic of percentage of project.
Ward: My XN Contributor (surname) 'l'ran 'l'lruy Larn
Thang 1.-ong 1nfrastructu1.c I)c\.clol,mcnt .loin1 Stock Company (Infra-1.llangLong) 157
Title: Vice-Chairman of the People's Committee of Loc Vuong ward
Title: Chairman of the National Frontier Committee of Vi Xuyen ward
Title: Chairman of the National Frontier Committee of Loc Vuong ward
Title: Vice-Chairman of the National I.']-ontier Committee of Loc Vuong ward
Title: tlie National Frontier Committee of Loc Vuong ward
Title: (.'liair~nan of the People's ('ommittee of Loc Vuong ward
Title: ('liairlnan of the People's ('olnmittee of Vi Xuyen ward
Renresenta tives of households livinp the area being suhiected to the Project
Thang I,ong [nt ias t ructu~.~ I ) c \ ~ c ~ ~ I ~ I I I c I ~ ~ .Ioint Stock Company (Inrra-'I.~~;ingI,ong) 159
VIETNAM URBAN IJPGR!\l>lNG I'KO.IECT - NAM DINH I.IIIRAN I ;] 'GRADING SUB-PROJECT Phase 11 Enironmental Impact ASS~SSII ICII~ (E1.4) April 2009
4. Contents of the meeting: - The PMU introduces about objectives, and social ~iieaning of the public consultation
session in respect of the environmental impacts causing by the Project; - The consultant presents about the Project of Urban Upgrading of Nam Dinh city,
Component 2, phase 2; - The consultant presents potential environmental impacts caused by the construction
and installation as well as pollution mitigation measures; - Discussion about issues of the Project, and its environmental impacts and pollution
mitigation measures. 5. Opinions of local authority and representatives of p ~ ~ b l i c community Opinions of local uutkority
Representatives of tlie People's Committee of Loc Vuorrg ward - Agree to the pro-ject schedule; - Contractor shall strictly follow the construction schedule
...................................................................................... Representatives of tlre People's Committee of Vi Xuyerr word - Agree to the Prqject; - The Project bring better capability of drainage of waste water for people of Vi Xuyen
and Vi Hoang ward; - The construction slioi~ld minimize their disadvantage impacts on the existing
constructions of Iioi~seliolds living at both side of the culvert lines. - To help those hoi~seliolds in constructing their sewer lines to the drainage system.
...................................................................................... Represeiztatives of tlrc People's Conznzittee of Loc Ila wurd - Agree to the Project; - Time schedule of tlie Project sllould be publicly inlorlned to every people for their
understanding and support.
Representatives oj'tlrr~ People's Conzmittee of Cua Nnrir ward - Agree to the Prujccl:
Opinions o f repre.senttrti~~e.s of'pnblic conznlunity Ward: Vi Xuyen Contributor (surnanic): Tran Van Do - Agree to the Project; - Quickly clear 0111 Ivaste produced by the Project construction but not occurring traffic
jam situation.
Ward: Ha Long Contributor (surna~iic) Ngo Ngoc Toan - Agree to the I'rqjcc~: - The PMU shoulcl closcl~. lollow tlie construction scllcdule.
Ward: Hn Lorig Contributor (surnanic) Ng~~ycn Thi Chien - Agree to the prc!ic~.l: - Agree to tlie plan 01' upgrading canal T3. I I
Wurd: Cua Nam
Thang 1.ong Infrastructusc. I )c . \~c. lop l l~c~l~ .loint Stock Company (Infra-71'l~:~ngLong) 160
VIETNAM URBAN UPGI<AI>ING PRC).IECT -NAM DlNH IIRRAN I !PGRADINCi SIJB-PROJECT Phase 11 Enironmental Impact A s s e s s n ~ e ~ ~ t (E IA) April 2009
Contributor (surname) Nguyen Ngoc Giao - Agree to the project; - Propose the Project to construct reservation area for drainage; - Some people living in the ward propose the City's Rubbish Company shoud collect
fee for waste water on basic of percentage of project.
Ward: Loc Ha Contributor (surnanicj LULI I'lii Bien - Agree to the projecl; - The Project s h o ~ ~ l d be quicltly carried out.
Representatives of local Representatives of local Representatives of local authority authority authority
Vice-Chairman: Tran Quoc Vice-Chairman: Doan Xuari Chairman: Tran Dang Ban Toan Thuan (Signed and sealed)
(Signed and sealed) (Signed and sealed)
Representatives of tlic PMU
Chairman:
Representatives of consultant
Deputy General Director Bui Van Nghien
(Signed and Sealed)
Thang L o n g Infrastructure I)c\.clopmcnt .loin1 Stock Company (~nfra-11lnngLong) 161
VIETNAM URBAN UPGR,:\D[NG PROJECT - NAM DlNH URBAN I JPGRADING SUB-PROJECT Phase 11 Enironmental Impact A s s e s s ~ ~ ~ e r l t (EIA) April 2009
SOCl ALlST REPUBLIC OF VIETNAM Independence - Freedom - Happiness
***************
MINUTES OF PUBLIC CONSU1,TATION IN IXELATION TO ENVIRONMENTAL IMPACT
Project of Urban Upgrading of Nan1 Dinh City (Conrl~one~lt 2 - Pltrrse 2 - tlie in.astructure level 1&2)
1. Time of meeting: 8h AM of gth May 2008. 2. Vanue: Headquaters of the People Committee of Ngo Quyen ward. 3. Participants:
Representatives of the PMU
Mrs: Pham Thi Lua
MrMrs: Vu Van .I h~101ig MrIMrs: Phalli Van Tien MrMrs:
Title: thc Investment & Construction unit, PMU Title: as above Title: as above Title:
Title: ('hairman of the National Frontier ('ommittee of Tran Hung Dao \\ ard
Title: Idand officer of Tran Hung Dao \\ ard
Representatives ol'hol~seholds livinp the area bein!! subjected to the Project
4. Contents of the meetiog: - The PMU introduces about objectives, and social meaning of the public consultation
session in respect ol'tlic environmental impacts causing by the Project; - The consultant PI-csents about tlie Project of Urbaii Upgrading of Nam Dinh city,
Component 2. ~ ~ I I ~ I S C 2: - The consultant pl-cscnts potential environmental impacts ca~~sed by the construction
and instal lation as wel l as pollution niitigatio~i measLires; - Discussion about issues of tlie Pro-ject, and its en\/ironmental impacts and pollution
mitigation measures.
Thang Long Infrastructut.c [>c t c . o p n i ~ , n [ .loint Stock Con~pany ( I~irra-. l 11;lngLung) 162
5. Opinions of local a~~tliority and representatives of public community Opinions of local crutlroritj~ . , . . . . . . . . . . . . . . . . . . . . . , . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Representatives of the People's Conznzittee of Trcln Hlir~g Duo ward - Agree to the project schedule; - The Consutruction should be carried out in form of sectional completion method,
which can avoid flooding siluation; - Selection of contractors should be carefully carried out during the bidding to ensure
quality of the conslruction.
Representatives uf'tllr Peo,t~le's Conzmittee of Trun H ~ I I I ~ Dao ward - Completion schedule should be ensured; - The construction sllould be in co-operation with heads of residential groups.
Opinions o f representcltives o f public contmunitv Ward: Ngo Quyetl Contributor (surname): Tran The My - Agree to the Prqject: - Security for the constructio~~ should be carefi~lly taken to avoid losing material, and
ensure traffic safely for people; - The construction 01' tclcphone system and water supplying system should be carried
out in the mean time.
Ward: Ngo Quyen Contributor (surnamcj 'Tran Xuan Duong - Agree to the Prqject; - The drainage syslc~n lasting fro111 Mac Thi Buoi to Nang Tinh lake shoud be of bigger
size.
Ward: Tran Hung L)ao Contributor (surname) Nguyen 'fhi Tin11 - Agree to the project; - People living near tile construction site should talce part to protect construction
material; - Representatives 01' local residential areas should be participate in the construction
under the role ot'co-supervision.
Ward: Tran Hung 1)rro Contributor (surname) I,a I'lii Dien - Agree to the project; - The construction sl~ould bc strictly in line with the dcsign.
Wurd: Tran Hurl: /)r~o Contributor ( s u r n n ~ ~ ~ c ) Ng~~\ ,en flii 1-4, - Agree to the proicc~: - Representative\ ol' rcsir!cnti;il area should participalc in the supervision of technical
construction.
Thang Long Intirastructu~.~ I ) c \ ~ l i i p r n i ~ ~ r .loill1 Stock Company ( Infra- .~ tl;~ngLong) 163
VlETNAM URBAN IJPGRADING PROJECT - NAM DINH URBAN I IFGRADING SIJB-PROJECT Phase 11 Enironmental Impact A s s e s s ~ ~ ~ e ~ l t (EIA) April 2009
Representatives of local authority
Representatives of local authority
Representatives of local authority
Chairman: Phan Dinh Dung Vice-chairman: Doan Thanh Vice-chairman: Do Minh Tan (Signed and sealed) Dam (Signed and sealed)
(Signed and sealed)
Representatives of the I'MU Chairman:
Representatives of consultant Deputy General Director
Bui Van Nghien (Signed and Sealed)
Thang Long 1nfrastructu1.e I.)cvclopmc~lt Joint Stock C:ompany (111fra-~hi~ngLong) 164
VIETNAM LIRBAN UPGR,\[>ING PRO.IIICT - N A M DINH IJRBAN IIPGRADING SIJB-PROJECT Phase 11 Enironmental Impact Assess~ l~en t (KIA) April 2009
SOClALIST REPUBLIC OF VII.;'fNAM Independence - Freedom - Happiness ***************
MINUTES OF PUBLIC CONSU1,'TATION IN RELATION TO ENVIRONMENI'AL IMPACT
Project of Urban Upgrading of Nalr~ Dinh City (Conlpolient 2 - Pllnse 2 - tlie irzfrustructure level 162)
1. Time of meeting: 1411 PM of 7"' May 2008. 2. Vanue: Headquaters of tlie People Co~nmittee of Thong Nhat ward. 3. Participants:
Representatives of the !'MU
Mrs: Pham Thi L L I ~
Mr/Mrs: Vu Van l'liuong Mr/Mrs: Pham Van Tien Mr/Mrs:
Title: thc Investment & Construction unit, PMU Title: as above Title: as above Title:
Representatives ot'consr~ltants
Mr/Mrs: Ngo H L I ~ 'roan Title: Consultant Mr/Mrs: Nguyen 1-loang Saln Title: Consultant Mr/Mrs: Phan l'lii 'fhu Ha Title: as above Mr/Mrs: Title:
Representatives of local ar~tllority body
Mr: Nguyen Van 1 nan Title: ('hairman of the National Frontier ('ommittee of Phan Dinh Phung \\ ard
Ms: Nghiem Xuan llai Title: Vice-chairman of the People's ('ommittee of Phan Dinh Phung \\ ard
Mrs. Tran Thi l i i m Phuong Title: ('liairnian of the National Frontier ( 'ommittee of Quang Trung ward
Mr. Luu Tien Minli Title Vice-chairman of the People's ('ommittee of Vi Hoang ward
Mr. Ngo Duy Duong Title ('hairman of the People's ('ommittee of Nguyen Du ward
Mr. Tran Duc 7 lhinli Ti1 le \'ice-Chairman of the People's ( ommittee of Quang Trung ward
Representatives o f Iionseliolds living the arcit beil12 subiected to the Project 4. Contents of tlic n~ccting: - The PMU introduces about objectives, and social n~caning of the public consultation
session in respect of tlic environmental impacts cau ,ing by the Project;
Thang 1,ong Infrastructul-c I )c \c lopmc~i~ J o i n t Stock Company (I11ft-a-'I Il:~r~gLong) 165
VIETNAM I!RRAN IJPGR ADING PIIO.IE('T - NAM DINI-I URBAN I 'PGRADING SIJB-PROJECT Phase I1 Enironmental Impact Assessriient (EIA) April 2009
- The consultant prcsents about the Project of Urban Upgrading of Nam Dinh city, Component 2, phase 2;
- The consultant presents potential environmental impacts caused by the construction and installation as well as pollution mitigation measures;
- Discussion about issues of the Project, and its envi~-onmental impacts and pollution mitigation measures.
5. Opinions of local ai~thority and representatives of pi1 hlic c o ~ n ~ ~ i u n i t y Opinions of loccrl urrllrori[)~ . , , . . . . . , . . . . . . . . , . , . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Representatives oftlre Peoj~le'.~ Committee of Tlior~g Rllat ward - Agree to the prqject schedule; - The PMU and contractors should be closely and regularly work with local People's
Committee and households in the construction areas.
Representatives (.ftlre Peuj~le's Conzmittee of C'i Huarrg ward - Agree to the project schedule; - To study for dcsign for i~pgrading the dranage sys te~ i~ of Han Thuyen - Nguyen Trai -
I,e Hong Phong.
Representatives uftlre I'eoj~le's Committee of Plrcrrz Diirlt Pltung ward - Agree to the prqjcct sclicdule: - The culvert lincs runrling along Phan C ~ L I Trinh strcct should be of better care during
the construction.
Opinions o f represerrlrrlivcs o f prrhlic comf~zunity Ward: Vi Hoang Contributor (surname): Trinh Dinh Chien. - Agree to the Project; - Construction sclicdulc ill relation to design, qualit\' :ind time of completion shoud be
publicly informeci to people for their supervision.
Ward: Ngo Quyerl Contributor (surna~iie) Tran Xuan Duong - Agree to the Projcct; - The drainage system lasting from Mac Tlii Buoi to Nang Tinh lake shoud be of bigger
size.
Ward: Thong Nhrrl Contributor (si~rnarilc) Ngu! cn Van Sy - Agree to the pro.jcct: - Constructio~i wo~.l<s sliuuld be of clean and quicly ci~rried out; - Technical d c s i y nlld cluality of conslruction S I ~ O L I I C I be regularly informed to people
for their contl-ih~~tioll ol'ol,inions. Ward: Pliun Djirll 1'11 I I I I ~
Contributor (surnan~c) I l i n h Van Cliinh - Agree to the pro.jcct: - Quality of C O I I S ~ I . L I C ~ ~ ~ I I and schedule of completion ~ I I O L I ~ be checked by people. Ward: Nguyen Llrr Contributor (surnalnc) I,c -1 l ~ i Ngi~yct - Agree to the pro.jcct:
-
Thang 1,ong 1nliastruct~11.c I )L . \ c , I ,q ln lc~l t .loint Stock C'ompany (Infril-'1 11:lngLong) 166
VIETNAM URBAN l il'(il<ADING PI<C).IECI - N 4M DINFI lJTlBAL i II'GRADTNG SUB-PROJECT Phase 11 Enironmental Impact A s s c s s ~ n c ~ ~ t (EM) April 2009
- Drainage systeln for rainny water should be of prioriiy.
Representatives of local Represcntatives of local Representatives of local authority authority authority
Chairman: Tran Phu Cuong Vice-chairman: Luu Tien Minl~ Vice-chairman: (Signed and sealer!) (Signed nnd sealed) Nghiem Xuan Hai
(Signed and sealed) Representatives ol' loc;~l
authority
Chairman: Tran Duc n'linh (Signed and sealerl)
Representatives of the PMU Chairman:
Representatives of consultant Deputy General Director
Bui Van Nghia (Signed and Sealed)
Thang Long Infrastructu~.~ I)cvoloprncnt Joint Stock Conlpan) (Infra-'1'h:lngLong) 167
VIETNAM IIRBAN IJI'(;I<ADING PROSEC'T'NAM DINH URBAN I [PGRADING SUB-PROJECT Phase I1 Enironmental Impact A s s e s s r ~ ~ e ~ ~ t (E1.4) April 2009
NAM DINH PEOPI,E7S COMMITTEE THE SOCIALIST REPUBLIC OF DEPARTMENT OF NATURAL VTETNAM
DECISION Ref: Approval for the Report on Environmental Impact Assessment of the Project "Urban Upgrading of Vietna~ii, sub-project of Nam Dinh city - Upgrading the infrastructure level 1 '2 Phase 11"
DIRECTOR OF DEPARTMENT OF NATURAL RESOURCE!; & ENVIRONMENT
Pursuant to the Law on Environmental Protection dared 29t" November 2005; Pursuant to Dccree No 80/2006/ND-CP dated 9"' A~lgust 2006 of the Government in respect of prom~igati~ig in detail and guiding for tlic implementation some articles of the Law on I:nvironmcllral Protection and Decrc. l\lo.21/2008/ND-CO dated 2gth February 2008 in relation to amending and supplementing to some articles of Decree No 80/2006/Nll-CP dared 9''' A u g ~ ~ s t 2006 of the Government in respect of promugating in detail and guiding for the implementation some articles of the Law on Environmental Protection; Pursuan to Dccision No.3253/QD-UBND dated 29"' December 2006 of the People's Committee 01' Naln Din11 province in respect of the cmpowering for the establishment of Appraisaling Council to the EIA Report, and signature for approval of the EIA Report of the project, which fall ~ ~ n d e r the autliorization of provincial People's Committee ancl assignment ol'responsibility to give ~~ppraisal, and confirmation to the Environmental l'rotection Commitment in industrial /.ones and clusters; According to the proposal of the Appraisaling Ccuncil to the EIA Report of the Project on Urban Upgrading of Vietnam, sub-project Nam Dinh city - Infrastructure Upgrading of lcvcl 1 , 2 pliase 11, which was already corrected and amended and being attached with csplaination document of these corrcifion and amendments in the EIA Report of tlie I'rojcct on lJrban Upgrading of Viet~i:lm, sub-project Nam Dinh city - Infrastructure Ilpgruding of lcvcl I , 2 pliase 11 dated 15"' August 2008 of the PMU on investment ancl c o ~ l s t r ~ ~ c t ~ o ~ i of Nam Dinh city. heir:;!. representing unit for the Project Owner; According to l>i.ol>osal ol'tlic nianager of'cnvironmc~ir ol'tice.
DEClIIES: Article 1: Approve thc coiltents AS stntcd i n the EIA Report c)n tlie Project on Urban Upgrading of Vietnam. sub-pl-o.icct Nam Dinh city - Infrasrr-~~cturc Upgrading of level 1, 2 phase 11 ofthe People's ('ommitrcc ofNam Dinh city (licrci;~altcr refered to as the Project Owner). Article 2. The Project O\\.ncl. shall takc responsibility to du!! carry o ~ ~ t contents as stated in the EIA Report and 11iadato1.y rcquircmcnts as below:
T'hang Lang 1nfrastructu1.c I)cvclolmc~:t .loin[ Stock ('omp:in! ( ~ n f r ; ~ - ' i ~ ~ ; ~ n g l , o n g ) 168
VIETNAM URBAN IJP(;l<AI)ING PROSECT-NAM DINH IJRBAN I iPGRADlNG SUB-PROJECT Phase 11 Enironmental Impact Asscssn~cnt (EIA) April 2009
Work in co-operation with relevant authority levels, and sectors to settle issues in relation to resettlement, co~npensation and site clearance as in accordance with the law.
During the process of construction, it has to ensure qualifying requirements in respect of noisy sounds and vibration as stipulated in Vietnamese Standards (TCVN): TCVN 5949-1998, TCVN 6962-2001; ensure [hat the entire exhaust and dust qualify: TCVN 5939-2005, TCVN 5940-2005.
The transportation of silt and constructional waste shall apply special transportation means with covering to avoid scattering silt ant1 waste to the environment during the transportation.
The collection. transportation and treatment of the elltire solid waste during the course of upgrading the infrastructure shall ensure to satisfy hygienic and environment requirements and in accordance with regulatio~l,; of the Decree No 59/2007/ND- CP dated 9"' April 2007 of the Government 011 the management of solid waste; collection, transportation, reservation, and trealnient of the entire harmfill waste ensure to abide regulations as provided by the Ilecree No 591200711VD-CP dated 9'h April 2007 ol'the Government on the management of solid waste, Circular No. 12/'IT-BTNM'f dated 26(" December 2006 of Ministry of Natural Resources & Environnlc~it providing guida~lce for the profcsional practicing and setting up procedural dossier, registration, and license for profesional practicing, code of management of liar1l1fi1ll wastc and the Decisio~l No. 2312006lQD-BTNMT dated 26'h Dece~ilber 2006 of Ministry of Nati~ral Rc:.oilrces & Environment providing the list of harm f i l l wastes.
To arrange movable public toilet roo1ils at construclio11 sites. Work in co-ordination with N a ~ n 1)illIi IZnviro~~ment Company (being ilie State owned limited liabilities Company) to collect garbage, waste water 1i.o~ i I tendslcampings of workers and public toilcls ~ ~ o o ~ i i s and move to tlie concentrated treatment position of Nam Dinh Environment Cornpan!,.
To closely work in coorperatio~~ with fi1l1ctiorl;il bodies in delimiting suitable transportation lillcs, which help reduce traffic ja~ii. and accident at the construction site.
Carry out managelllent and technical measures to p~xvent and fighting and overcome traffic accidcrlls. fire and explosion, and othe en\;il-onmental risks.
Arrange financial aid for. tlie cnvironn1ental treatnicnt and management construction during the caul-sc of i~i~plelnenting the Project a:, i n accordance with the registered items addressed ill the Iteport with total cost of 'iO3 nill lion Vietnamese Dongs.
Seriously follo\v reporting regime as stipulated a[ the Decree No.80/2006/ND-CP dated 9"' August 2006 ol'tlie Governmc~lt in rei.;,cct ul'pro~nugating in detail and guiding l i ) r tlic i~nl,lcnlcntatio~i so~iic article> of' the I,aw on Environmental Protection: Dccl-cc No.2 112008lND-CO dated :'x'" 17ebrilary 2008 in relation to amending arltl .sul)plc~nclltillg to sornc articles ol I>ccrec No 8012006ND-CP dated 9Ih A U ~ I I S ~ 7000 ol.tl~c' (io\/crn~lient in respect ol:~ro~llugating in detail and guiding for the i~iiplciiicr~~atim sonit: articles ol'llle La\\ o n Ilnvironmental Protection; and Circular No.OX~~O~O~"I"I '-I~'~NIVIT datcd 08/9!.'!006 of' the Ministry of Natural Resources & I:llviro~~rnent "providing to en\.ii-onnit:~ltal strategic assessment, environmcnlal ilnpac~ asscssmcnt, and com~liit~itcnt for environ~netal protection"
-- Thang Long Intiaslructul .~ l )c \ ,c lo lm~c~>[ .loin[ Stock C'olnpa~l! (Infr;~- ' t i~;~ngl,ung) 169
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN l JPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessn le~~t (EIA) April 2009
in respect of building up plan for the construction, intallation and operation of environmental treatment and protection constri~ction, report on the completion of contents addressed in the EIA Report, outcome of the periodical environmental management and supervision works and request of this Decision to send to the Department of Natural Resources & Environment.
Article 3. The EIA Report of the Project and madatory requirements as stated in Article 2 of this Decision are basics for the functional State management bodies to carry out inspection and control the implen~entation of the Project's environmental protection works. Article 4. During the course of implementing the Project. if contents of the approved EIA Report are changed, the Project Owner shall submit its Itritten report and carry out such changes only after obtaining approval in written of the Dcpartrnent of Natural Resources & Environment.
Article 5. Assign the Environ~nent Office to carry out the inspection, supervision the implementation of contents in relation to environmental protection as addressed in the approved EIA Report and requirements as stated in Article 3 of this Decision.
Article 6. This Decision taltes effect for the implementatio~i as of the date of signature.
Dl RECTOR
LL VAN LICH (sigued and sealed)
. - Recipients:
The Project Owner; Relevant bodies; File.
Thang Long Infrastructure I)c.veloptile~it Joint Stock Company (1nfr;)-.lI~;~ngLong) 1 70
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN I IPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA)
~. April 2009
ANNEX E
TECHNICAL SPECIFICATIONS
Thang Long Infrastructure Development Joint Stock Company (Infra-'I'l~angLong) 171
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN 1 IPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
TECHNICAL SPECIFICATION - EARTHWORKS
1. Scope 1.1 General
This Part of the Specification contains requirements that, where relevant to this Contract, shall apply to site clearance, general excavation, trench excavation, embankments, topsoiling, and landscaping.
1.2 Works in Roads Where the construction is carried out within the limits of a 'road' or a path, the Contractor shall comply with the government and local authority regulations, and anything in these Specifications that conflicts with such provisions shall not apply.
1.3 Definitions The following terms shall have the meanings hereby assigned to them:
'Topsoil' any surface material capable of supporting vegetation and suitable for use in soiling areas to be grassed or cultivated.
'Rock' naturally-occurring material whicli. in the opinion of the Project Manager, would normally have to be loosened either by blasting or by thc use of pneumatic tools (other than clay spades) or by other rock quarrying methods or, if excavated by hand, by the use of wedges and sledge hammers. An isolated solid boulder or detached piece of rock shall qualify as rock only if it excccds 1.0 m3 in volume.
'Bulk excavation in open cut (excluding trench excavation) down to levels Excavation' specified in the Drawings, or otherwise as being the general levels
after completion of excavation, other than incidental excavation.
'Trench escavation, to the levels and lin~its specified in the Drawings or Excavation' otherwise, oftrenches into which pipes and the like are to be laid.
'Incidental excavation (generally in small qu::ritities) below or outside the limits Excavation' 01' bulk excavation and trench excavation, but excluding excess
excavation.
'Excess excavation outside the limits specitied for bulk, trench or incidental Excavation' excavation.
2. Reference Standards Materials and workmansllip shall co~nply with the folio\\ ing Vietnan~ese Standards.
- TCVN-4447, 19S7 Earthworks, Construction aiiil Chccl\ 'l'ake-Over Standards. - TCXD-79, 1980 Construction and Check l'al,c-Over for Fo.undation Works. - 14-TCN-2-85 Earth Structures, Rules for I .sccution by Compaction Method. - QPTL.1.72 Technical Strindards for ('onstr~~ction of Embankment by
Compaction. - QPTL.Dl.74 Technical Standards for 1:secution and Check Take-Over for
Surface Watcr Drainage and Gro~~ntlwater Development Works.
Thang L o n g Infrastructure I>eveIol>mc17t .loint Slack Conipany ( I I I~~: I - ' I 11:111g~ong) 1 72
V[ETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN [JPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (EIA) April 2009
3. Submissions by the Contractor Submissions which the Contractor is required to make in relation to earthworks include, where relevant, the following:
Drawings and survey notes: - Contractor's record drawings of the ground level survey prior to the start of any
earthworks; - information obtained from trial holes ordered by the Project Manager; - Contractor's record drawings of any other level surveys taken for the purposes of
measurement of quantities of excavation or filling, such as Rock level surveys (survey record drawings as specified above shall be submitted within 7 days of the completion of the survey work recorded on them);
- survey notes on depths of Trench Excavation; - proposals to excavate with sloping faces without support.
Certificates: - laboratory tests; - field tests.
Details of proposed methods: - proposed methods of excavation, transport of materials, filling and compaction; - proposed source of free-draining fill and methods of selective excavation or processing; - programme for quality control of earthworks and proposals for the use of off-Site
laboratories.
Samples: - materials proposed for filling and for geotextiles, where specified or where specifically
required by the Project Manager.
4. Materials Fill material - general Excavated material (including material excavated from borrow pits), selected by the Contractor for use as baclililling to excavations, as filling around structures or as filling for embankments, shall be free from lumps and shall be approved by the Project Manager.
Should the material selected as filling, while acceptable at the time of selection, become unacceptable to the Project Manager for any reason including exposure to weather conditions, flooding, contamination by other materials or segregation during the progress of the Works, the Contractor shall at no extra cost to the Employer remove such damaged, softened or segregated material and replace it with fresh approved material.
lmported Topsoil Imported topsoil shall be provided by the Contractor li.o~n an approved source. The texture shall be 'light' or 'mediil~n' and the soil reaction 'slightly alkaline' or 'slightly acid to neutral'. The stone content shall not exceed 10% by dry weight and no stone shall exceed 50 mm in any dimension.
Geotextiles Geotextiles shall have the mechanical and hydraulic properties of the geotextile types and manufacture spccified in 1'al-t 3 of this Specification. o r equivalent types approved by the Project Manager. The Contractor shall provide evidence to the Project Manager, before the geotextile is incorporated in the Permanent Works, that the geotextile will be sufficiently durable to maintain its integrity for at least 15 years.
Thang Long lnfrastructurc [)cveIoprncnt .loir~t Stock Company (Infril-'l'l~ang[,ong) 173
VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN IJPGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
5. Workmanship
(a) General Levels to be recorded Before the surface of any part of the Site is disturbed or the Works thereon are begun, the Contractor shall take and record levels and dimensions of any such part. The Contractor shall also take and record such other levels and dimensions as are necessary during the progress of excavation to allow for accurate measurement of the different categories of excavation.
All levels and dimensions shall be taken in the presence of the Project Manager and recorded in the manner specified or as agreed with the Project Manager, and such levels when agreed with the Project Manager shall form the basis for measurement. Excess Excavation (backfilling) Excess excavation may normally be backfilled with material emanating there from, but where the Project Manager has ordered such material to be removed to designated disposal areas as being unsuitable, the Contractor shall make good the excess excavation with such kind of fill material or in such class of concrete as may be reasonably required by the Project Manager having regard to the circumstances.
Trial Holes The Project Manager may direct that trial holes shall be excavated in advance of other excavation to such dimensions and depths as he shall order to obtain information required by him.
Any further trial holes required by the Contractor to determine the position of underground services, sub-soil drains or for any other reason shall be excavated and reinstated at no extra cost to the Employer.
The Contractor shall arrange for the refilling and reinstatement of trial holes to be carried out immediately the required information is obtained. The reinstatement of the surfaces of trial holes shall be carried out to the approval of the Project Manager.
Excavations: Support and Working Space The Contractor shall provide effective support for the sides and ends of all excavations to prevent any fall or run from any portion of the ground outside the excavation and to prevent settlement or damage to structures adjacent to the excavation.
If, for any reason, any portion of the bottoms, sides or ends of any excavations shall give way the Contractor shall at no extra cost to the Employer take all necessary remedial measures including the excavation and removal of all the ground thereby disturbed both within and without the nominal limits of excavation and such extra excavations shall be held to be excess excavation.
Where the Contractor proposes to carry out excavations with sloping faces (other than sloping excavations shown on thc Drawings or required as permanent features of the Works) and without shoring, cxcavatcd faces shall be to stable slopcs and heights and the resulting extra excavation shall be held to be excess excavation. Full details o f the Contractor's proposals shall be sublnittcd to the Project Manager for approval.
The Contractor shall be dec~ned to have made his own allowance for any working space or support required. and any excavation outside the specilied or nominal payment limits which has not been ordered by the Project Manager. whether it be excavated to suit the Contractor's method of working or unavoidable overbreak or due to his carelessness or error, shall be held
a Ion. to be excess excav t'
Thang Long 1nfrastructul.t: L)cvclopmcnl .Joint Stock Colnpnny (1nfr:l-.l'hangLong) 174
Fossils and Othcr Objects found in Excavations No requirement of the Specification regarding the disposal of material arising fiom Site clearance or excavation shall override any provision in the Conditions of Contract as to the discovery, or ownership, of fossils, coins, articles of value or antiquity, or anything of geological or archaeological interest found on the Site.
Inspection'by the Project Manager When the specified levels or limits of any excavation are reached, the Project Manager will inspect the ground exposed and if he considers that any part of the ground is by its nature unsuitable he may direct the Contractor to excavate further. Such further excavation shall be refilled to the specified levels or limits with concrete, selected excavated material or selected imported material as directed but shall not be held to be excess excavation.
Should the material forming the bottom or side of any excavation, while acceptable to the Project Manager at the time of inspection, subsequently become unacceptable due to exposure to weather conditions or due to flooding or have become disturbed, soft or loose during the progress of the Works, the Contractor shall remove such damaged, softened or loosened material and excavate further to a sound surface. Such further excavation shall be held to be excess excavation and material emanating there from shall be removed from the Site.
(b) Site clearance Site clearance Subject to the general requirements of Part I of the Specifications, all areas of the Site specified or marked in the Drawings for clearance or fiom which material is to be excavated or upon which filling is to be deposited shall be cleared to the extent required by the Project Manager of all buildings, walls, gates, fences and other structures and obstructions and of all bushes, hedges, nipa, trees. stumps, roots and all other vegetation, but not trees marked for preservation. Material so cleared shall so far as suitable be reserved and stacked for the Employer's use but shall otherwise be burnt to ash or disposed of off the Site as directed by the Project Manager.
Trees Subject to any authorisation by the relevant authority, where directed by the Project Manager, trees shall be uprooted or cut down as near to ground level as possible. Branches and foliage shall be removed and burnt to ash or disposed of off the Site. Useful timber shall, as between the Employer and the Contractor, be deemed to be the property of the Employer.
Stumps Stumps and roots whcther existing or remaining after tree felling shall, where directed by the Project Manager be grubbcd out and disposed of. The resulting hole shall be filled, where directed by the Project Manager, with approved material deposited and compacted in layers to the same dry density as the adjoining soil.
(c) Excavatiori (oflrer flrrrrr .fi)r pipe frenclres) Excavation generally For the purposes of tliis sub-section, thc term 'Excavation' shall include excavation, whether bulk or incidental. required for structures. roadworks : I I I ~ horn required excavation. It shall not include excavation for pipe trenches and.the like. cxccpt for ~niscellaneous isolated lengths of trenches beneath or ad,j:~ccnt to structures, such tl.cnches being deemed to be incidental excavation.
The ground shall be excavated by such methods and to such dimensions and depths as shall allow for the proper construction of the Works.
Stripping of top surface
Thang Long Infrastructul.c I )cvclop~ncrit .Ioint S1oc.k C'ompan~, (I~~fr;i-.l'll;~ngl,ong) 175
Where ordered by the Project Manager, or as may otherwise be required under this Specification, the top surface including topsoil if any shall be stripped, to such depths and over such areas as the Project Manager may direct, as a separate operation prior to any hrther excavation which may be required.
.I Ions Trimming excava t' When excavating to specified levels for the foundation of any structure or to specified limits for the face of any structures required to abut undisturbed ground the Contractor shall not finally complete the excavation until immediately before commencing the constructional work, except where the Project Manager shall permit otherwise.
Before commencement of any constructional work all disturbed and loose material shall be removed from the excavations so as to ensure that the work item rests on a sound and clean foundation or where appropriate abuts against undisturbed ground.
Disposition of excavated material within the Site Subject to any specific requirements of the Contract, the disposition of excavated material within the Site shall be at the Contractor's discretion but shall be so arranged as to suit the overall requirements for the construction of the Works.
The Contractor shall ensure that no excavated material, which is suitable for and is required for reuse in the Works, is disposed of outside the Site, without the Project Manager's approval.
Disposal areas within the Site Only material, which is approved by the Project Manager, shall be placed in the various designated dispos~il areas. No tree trunks, stumps, roots. branches or rubbish of any kind shall be placed in disposal areas.
Temporary spoil tips may be used to store excavated material, as required, and shall be arranged by the Contractor subject to the Project Manager's approval having regard to any particular requirements of the Contract. Temporary spoil tips shall be so shaped as to maintain stability and good drainage at all times. l'opsoil stripped from the Site shall be stored in separate spoil tips for use in reinstatement or landscaping.
The limits of designated disposal areas shill be as shown on the Drawings or as may be directed by the Project Manager for landscaping purpose\. Designated disposal areas shall be finished to shapes as indicated on ihe Drawings or as dirccted by the Project Manager.
Disposal of unsuiti~ble matcrial Excavated material. wliich is not required for or is unsuitable for re-use in the Works or in designated dispos:ll areas shall be disposed of off the Site as directed by the Project Manager either to locations to be fbund by the Contractor off Site (Contractor's tip), or to locations designated by thc Pro-jcct Manager (Project Manager's stockpile).
Material ordered lo bc disposed of to the Contractor's tip shall. as between the Employer and the Contractor. hc dee~ncd to be the properly of the Contractor and he shall be entirely responsible for i t \ rc11iov:ll l iam thc Sitc :nld ultimalc di\l)osal.
Material ordered lo be disposed of to the Project Manager's stockpile shall remain the property of the Employer and slinll be transported and depositctl at places designated by the Project Manager. Materi,ll so depc~sitcd shall be shaped up 01. \l>read and levelled as directed by the Project Manager.
Thang Long Infrastructure I)c. \~c.lol>~nc~~[ . I o i ~ ~ l Ctoch C'o~nl>;in! (Infr;t-'~ Il;lngL,ong) 176
VIETNAM URBAN IJPGR/\DING PR()JECT - N A M DINH LlRBAh I IPGRADING SUB-PROJECT Phase 11 Enironmental Impact Asscssmeiit (Elr\) April 2009
Arrangements for the Contractor's tip, where ordered by the Project Manager shall be such as not to create a nuisance or to interfere with, obstruct, endanger, or contaminate the Works or any existing property or sources of water; the completed tips shall harmonize with their surroundings. The Contractor's tipping arrangements shall comply with the regulations of any planning, health. or other duly constituted authority having an interest therein. If any of his tipping arrangements fails to comply with the foregoing, the Contractor, at no extra cost to the Employer, shall take such measures as the Project Manager may consider necessary in order to remedy the matter.
Restoration of borrow areas Borrow areas shall be rehabilitated on completion of thc Works. Sides shall be cut to stable slopes and the bottom of the borrow area shall be trimmed to a cross fall to permit drainage. The fall shall lead to a low point adjacent to the riverbank and drainage arrangements necessary to avoid the accumulation of acid water and its adverse affect on adjacent cultivated land shall be made by the Contractor to the approval of the Project Manager. The cost of rehabilitation shall be deemed to be included in the ratcs for filling contained in the Bill of Quantities.
The Contractor shall obtain the specific approval of the I'roject Manager for the condition of the borrow areas on completion, as a prerequisite lo the issue of the Certification of Completion.
Backfilling of eucavatio~is For purposes of this sub-clause, the term 'backfilling' nicans replacing material into any part of the excavations which the Contractor has needed for working space and which is therefore deemed to be excess excavation. Backfilling shall be carried out using material emanating from the excavations and complying with specified requirements. The backfilling shall be properly compacted and where necessary the Contractor shall adjust the moisture content of the material either by drying out or by adding water. Aficr such drying out or adding of water, the material shall be t h o r o ~ ~ ~ l i l y mixed until the moisture content is uniform.
Filling to structures Filling to structi~rcs Incans tilling around or over completed structures (whether within excavations or not) s sing such material as may be specilied, and to the limits shown in the Drawings. It docs not include 'backtil ling' as described i l l the preceding clause. Where the Contract requi~,cs the placing of different types of fill material in separate layers or wedges the Contractor shall carry out the work so as to avoid mixing the different types of material. Should there bc any mixing of materials, such mixed materials shall be removed from the Site and rcplaced \vith separate materials, all at I I O extra cost to the Employer. Backfilling not to cndangcl- structures The Contractor shall arrange the timing and rate of placing of backfilling or of filling to structures in such a way that no part of the Works is overstressed, weakened, damaged or endangered. The layers ol'material shall be so placed a?, lo maintain adequate drainage and to prevent accumularion of \vatcr. In particular, the p lac i~~g of material around the walls of basements, rescl.voirs and tanks shall colnmence onl!. c~lier the walls and floor have been completed and Iiavc attnincd tlicir f i r l l slxcilicd st1.cngt11. Material behind walls fixed at the top to the roof s l~i~l l not 11c ~~lacecl 1111til tllc ~ .oofhas bee11 completed and, if made of concrete, has attained its 11111 ~>cciliccl strength a~id 1i:liI the tcmpcjl.:~ly supports removed. The material shall be placed u~lilorliil!, : I I . O L I I I ~ tI1e \ \ , ; I I I S o l ' s t r i ~ c t ~ ~ ~ ~ c ~ i l l S L I C I ~ manner as to avoid eccentric or differential loacls.
(d) Trench Esc(r ~*rr f iorr Trench excavation genct.;~llv
Thang 1,ong Inti-astructuw I)t\ C I O P I I > L I I I . )OIIII StocI\ (.o~iip.~~i) (IIII.I.:I-'I 11:11igi.ong) 177
VIETNAM URBAN UPGIII\I)ING I'IIOJECrr - WAM DINH 1!RRAN UPCIRAIIING SUB-PROJECT Phase 11 Enironmental Impact A s s e s s n ~ e ~ ~ t (EIA) April 2009
Trench excavation means excavation of trenches into which pipes are to be laid and the term 'pipes' shall mean pipes of all kinds and for whatever purpose, and shall also include cables except where the context clearly renders this inapplicable.
The line and level of trenches shall be as shown in the Drawings or as may be directed by the Project Manager. Before commencing trench excavation, the route o f the trench shall be set out accurately and the natural ground levels shall be recorded and agreed with the Project Manager. Strong sight rails shall then be fixed and main~ained at each change of gradient and at as many intermediate points as may be necessary. On these rails shall be marked the centre line and the level to whicli the excavation is to be carried out, such rails being not more than 40 m apart.
Trench excavation shall be carried out by such neth hot is and to such lines dimensions and depths as shall allow for the proper construction of tlic Works. Except where otherwise specified or approved, thc types of temporary suppoll, their design and the procedures for installing and withdrawing them shall co~nply with the sccluirements and recommendations of ClRlA Report 97.
The sides of trench excavation shall be vertical unless tlic I'roject Manager permits otherwise.
Any widening or deepening of trench excavations necessary to accommodate curves, joints or bends in the pipe or to provide extra working space for the construction thereof shall be held to be excess exca\lation.
N o length of trench excavation shall be started until 11ir pipes to be laid in that length are available on the Site.
(e) Embankmen/.s Embankments gcncl-ally The term 'e~nbzulkment' includes, for example. the construction of embankments for roadworks and bunds or dykes for small lagoons.
The forming of spoil tips and filling around or over completed structures are dealt with under 'Excavation'.
Material for ernb;~nlin~cnts General Except as otherwise defined in the Specification, the descriptions of soils and rocks shall be as stated in the relevant Vietnamese Standard.
Embankment fill nrn/e~.irrl.s - ycncrr~l Fill materials for thc enibankme~its shall be obtained l i o ~ n the required excavations for the sluice, diversion clia~incl/c:~~ials nnd associated structures, selected and processed as may be necessary to confbrni to tlic specified requirements, or li.um other sources to be agreed with the Project Mana~gcr. All ~iiatesials slinll be to the appro\,al of the Project Manager.
Fill materials tot. c l i l h a ~ l l i ~ l ~ ~ ~ i t s sIi;11I be fi.ce of wootl ;lnd organic material and shall not contain any lumps \\.liicli c.a~inot be t>~.okcli LIP during cr.~lil,actioti or which are composed of material not coli li,l.nii~iy to I lie spcci lied requirements.
Should any ~natcri:~l I7ci1iy placed, while acceptable at the time of selection, becomes unacceptable to the I'rqjcct Manager duc to exposure to \vcather conditions or due to flooding or has become p~lddlcd soli or segregated during the 1,rogress of the Works or have been mixed with matcsii~l ol'a di t'lkrcnt t).pc. tlic Contractor sl:;~ll, at no extra cost to the Employer,
Thang I,ong Infrastructure I )c\ clol,~iic~l~ I o i n t StocA c 'omp,~n! (1nfr;l-'I Il;~ngt,ong) 178
VIETNAM URBAN UPGR/\DING PICOJECT - NAM DlNH URBAN I II'GRADING SUB-PROJECT Phase 11 Enironmental Impact Assessrr~er~t (EIA) April 2009
remove such damaged, softened, segregated or mixed material and replace it with fresh approved material.
Wherever possible, excavated material approved as fill material for embankments shall be transported, placed in its final position in the Worl,s and compacted without delay. Stockpiling of excavated material shall take place only when specifically approved by the Project Manager. In such n case, measures shall be taken to preserve fill material in a suitable moisture condition and keeping the top surface graded with sufficient crossfall to promote run- off and prevent water standing on the surface of the stockpile. Material shall not be left stockpiled in a louse condition such that it absorbs mois t~~re or dries out, making it unsuitable for use as fill in c~nbankments. Stockpiles shall not contain any material unsuitable for the intended use.
Construction of cmbanl<mcnts All embankments shall be constructed in accordance with the Drawings with selected materials obtained from tlie excavations or from other sources approved by the Project Manager.
The approved materials sliall be placed in layers, and slinll be compacted all in accordance with the provision containcti in Part 3 ofthis Specification. The layers of fill material shall be so placed as to maintain adequate drainage and to prevent accumulation of water.
Where the Contract r eq~~i rcs the placing of different types of fill material in separate layers the Contractor shall carry out tlie work so as to avoid mixing the different types of material. Should there be any ~iiixing of materials, s ~ ~ c l i mixed materials shall be removed from the Site and replaced with separate materials, all at no extra cost to the Employer.
Unless otherwise directed by the Project Manager, fill ni:~terials placed in disposal areas need not be compacted.
Geotextiles Geotextiles shall be protcctcd at all t in~cs against mechanical, chemical or environmental damage. Geotextiles susccptible to damage by light shall be stored under cover.
Laying of geotcstilcs Geotextiles shall be laid and lapped as specified or in ~~ccordance with the manufacturer's recommendations. The layer of material on which the gcotextile is to be placed shall not have protrusions or sharp projectioris, which arc likely to d a ~ i i ~ ~ g e the geotextile during installation or in service. The ~nctliod of installation shall ensure that the geotextile is in continuous contact with the surfi~cc 011 ~vliich i t is to bc placed and t l ~ c geotextile shall not be stretched or bridged over hollo\vs or 11~11iips. Operation of constru~tion plant directly on the installed geotextile will not be pcrniittcd. Carc sliall be taken i n ]]lacing fill material to avoid damage to the geotextile.
Ct) Topsoiling r r r r ( 1 grtr.\sirr~g Topsoiling Parts of the Site as rn;~y hc ortlercd h! tlic I'rojcct Mn~l:~:~c'r sliall, as soon as practicable after the completion ol' cltlicl. c:~rtli\vor.ks, be covered \villi tollsoil and sown with grass, all as specified hereu~itle~..
So far as is practicable. tollsoil sliall be obtained liom 111;1terial emanating from excavations and separately stored i l l Iernpolary spoil tips. as spccitictl I f ' iri the Project Manager's opinion the Contractor cannot rc;~sonably obtain sufticien~ tolloil in this, way he may order the Contractor to pro\ idc extra materi;~l ('imported topsoil'j l iom an approved source off the Site.
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Thang 1,ong Intiastruct~rr.c I) i . icloj l~il~~i:r . I t l in t 5tock ( 'on i l~a~i ! ( I I I ~ ' ~ . ; \ - . I ' I I ; ~ I I ~ , ~ . O ~ ~ ) 179
VIETNAM URBAN IJPGR \DING PI(O.IECT-NAb1 DIN11 IJRDAY I IPGRADING SUB-PROJECT Phase 11 Enironmental Impact A s s c \ s e ~ e e t (EIA)
-- -- April 2009
Topsoil shall be evenly spread and trimmed over embankments and other areas to the slopes and levels shown in tlie Drawings or ordered by the Project Manager. The depth after spreading and trimming shall be 250 mm unless otherwise directed, or shown on the Drawings, measured perpendicularly to the surface. All clods and lumps shall be broken up and any rubbish, large stones, roots and weeds shall be removed.
Grassing Where directed by the PIO-ject Manager, areas which I:ave been covered with topsoil, or otherwise suitably prepiueil, sliall be sown with grass secd using the mixture and application rate specified hueafter or, where not so specified. using a mixture and application rate proposed by the Contractor and approved by the Project hlanager.
The top surface of the previously laid topsoil shall bc brought to a condition suitable for seeding, and sowing shall be carried out as soon as practicable after completion of topsoiling having regard to the season and to weather conditions. If ordered by the Project Manager, ground lime and fertiliscl. shall be applied in accordance with his directions, and valued as additional work.
After the seed has bcen S O L L I ~ i~niSormly at tlie specilied r.:tc it shall be raked and lightly rolled into the surface. I'lic you~lg grass shall be kept frec fro111 iveeds and any bare patches shall be re-seeded until an evcn close turf is established. Thc g a s s shall be cut as required and maintained in good condition until the expiry ofthe Defects Liability Period.
6. Testing Testing by the Contractol- The Contractor slii~ll be scsponsible for carrying out all field and laboratory tests required for the proper control of earthworks.
I>aboratory tests sliall be carried out at tlie Site or in an L)ff-Site laboratory, approved by the Project Manager. Field density tests sliall be performed ensure that the specified density is being obtained. I 'wo copies of the test resi~lts and calcuIa;ions shall be submitted to the Project Manager.
7. MeasurernentforI'a)~~nrnt General References in this section to 'itellis' sli:~ll mean items ill tlic Bill of Quantities.
Site clearance Items for 'Site clearance' sliall inclucle for clearing tlie Yite all as specified, excluding trees and stumps largc cnougli to qualify for scparatc ~iicusurc~iicnt under any further items, which may be provided. Sitc clc;i~.:~nce sliall be mcas~lred :I, tlie area so cleared to the Project Manager's requirc~ncnts.
Items for cut, renio\ic trees exceeding a stated ~ninimum ~ i l - t h sliall include for felling, cutting up, and transporting usefi~l timbcr to a location pl.ovitl~.tl by tlie Employer all as specified. Trees shall be classilictl Ii11. ~iieasurc~iient according to ! i . ~ i r girth measured at 120 cm above mean ground levcl.
Items for 'stunips' sliall ilicludc for grubbing up and di,posal of stumps and roots and for filling up the resu l t in&! Iiolc :II I as speci tied. Stu~ilps <!i:lII be classified for measurement according to tllc Illcall ili~uiictcr of'tlic stulnp ~iicasu~~ecl aL.loss the c i~t .
VIETNAM URBAN IJP(;Ri\l)lN(; PR9.II.:CI'- N A M DINH UIIRAN I:'I'GRADING SUB-PROJECT Phase 11 Enironmental Impact A s s e s s ~ ~ ~ c ~ ~ t .. (EIA) April 2009
Items for 'excavation' except where expressly indicated otherwise shall apply to excavation whether bulk or incidental in any material other than lock and shall include all work in connection with excavation.
Where appropriate. further items are included for the disposal of excavated material to Contractor's tip or Project Manager's stockpile.
Items for 'excavation ill rock' shall be deemed to include for any allowance the Contractor considers necessary to co\,cr overbreak and the making good thereof.
Items for 'trial holcs' sli311 include for the excavation, rc~illing and reinstatement of trial holes ordered by the I'roject M;lnager. together with the colli.ction, recording and submission of such information as lie ma) require.
The foregoing excavation items shall be measured as the rict volutne of the voids to be formed by the removal o f materials excavated to the nominal payment levels and limits described herein or shown iri the Drawings.
Excavation for removal of unsuitable material shall (unlcss it is held to be excess excavation) be measured as the volu~ne ordered to be excavated beyolid the specified limits of excavation and items for such excavation sliall include for the diiposal of the unsuitable material to designated disposal arc:ls :lnd for refilling the excavntici~~ with approved material emanating from other excavations.
Where nominal 'paymcnt limits' to evcavation are not sliown in the Drawings or otherwise specified they sliall be dce~iied to be the minimum net limits which would allow the outline of the completed strlrcturc to be lowered vertically from ground level into its final position.
No separate paymelit sli;~ll hc made i n respect ofexcess c..,cavation or the backfilling thereof.
Excavation of an! rnatc~.ial sliall be measured once only. ICcmoval of material from temporary or permanent spoil tips : ~ n ~ l from surcharge and required lor filling, or removal to designated disposal areas shall 110t he 11ie;lsul.ed (as excavation) for pi\ylnent.
Filling
Items for filling to structures sliall include for the loading, hau!age, unloading, placing, compacting and shaping all as specified of material from rcquired excavation.
Items for free draining fill or otlicr special f i l l material sllall include for the supply (whether from an external sourcc o r from excavated material p~,)cessed by the Contractor) and for placing, compacting and shaping of the material all as spc.;.ilied.
Filling shall be nicasurcd as the volume after compaction or material placed to the limits defined on the I)ra\vings. rile Contl.actor. sliall be deenit.il to 11:1ve made his own allowances for compactioti a~lcl lor :In! scttlerncrit of material into tlic ~r.oulid.
Backfilling o f c \ ~ ~ ; ~ \ ~ : ~ t i o ; ~ s shnll 1101 I3c nicasurcd for. p:~! 11;:rit
Trench excavat i o l ~ Items for trench c~ca\, i~!iori sliall aly,ly to excavation i l l :111y material except where expressly indicated other\\i.;c ant1 sllall incluclc riot only for all \ \ojl . in connection with excavation but also for refilling llic trc~ich and fi,r disposal ot'su~.plus n~a~cr ia l , lor temporary fencing and, in open land, for tlic str.il>l>i~il! of tlic top surface incl\~.:llig topsoil if any and subsequent reinstatement o l ' t l~c 1011 \ I I I . I ; I C C a l l as spccifictl.
Trench excavation shall be measured by length along the centre-line of the pipe at the various depths stated i n the Bill of Quantities and the Contraclot. shall be deemed to have made his own assessment (subject to any specific requirements of t l ~ e Contract) of the widths of trench excavations neccssary fbr the proper construction of thc Works including all allowances to provide support lor tlie excavations, to acco~nmodate joir~ts and bends in the pipeline and to provide working space. 'The length of trench excavaoL,n shall be measured through and including any space cccul~ied by manholes, chambers. tl.~.ust blocks and the like. No extra payment shall be made I'ol- trenches which are curved in plan or elevation.
The depth of trench excavation shall be measured vertically from the original ground level, or where appropriate from tlie ground level remaining alicr the completion of any over site excavation, down to tlic specified invert level of the pipe plus the thickness of the pipe barrel and plus, where appropriate. the specified thickness of betiding for the pipe.
For the purpose of measuring quantities of other items adtlitional to trench excavations (such as incidental excavation, surface reinstatement i n road land drains and services), trench excavations shall bc dec~ncd to be of the nominal dimens~~lns stated below:
(a) Tlic nominal depth shall be the clcpth as defined in the preceding paragraph.
(b) E\ccpt in rocl.;. tlie ~iominal width shall be as follows where 'D' is the external dinmelet. of the pipe including any protcc~ive coating:
D not cxcceding 400 mm: 750 mm I) eucccdi~ig 400 mln. not exceeding I , I00 Inm: (D + 550) mm I) cucecding 1.100 mln: (D + 750) mm
The sides ol'trcr~ch excavation shall be deemed 10 be vertical and the nominal widths shall apply to ally depth of trench and whether or not bedding or surround to the pipe is specified.
Any excavation oulsidc 111c.se limits, whicli lias not been (ridered by the Project Manager, shall be held to be excess escav. <I t ' lon.
W o r k incidental l o t l -cr~r l~ e\cav;~tion Work incidental to 11.e11cli cxcavario~i shall be measured \;parately from the items for Trench excavation only lo tlie cutcnt that any of the following fill ~lier items are included in the Bill of Quantities.
Incidental exca\,~tion ILr st~.~lctures situated in the pipcline shall be measured only to the extent that the nc\t eucal c~tion rcquired to accornmodatc 1 1 1 ~ ~ structures falls outside the nominal dimensions of tlic trench c\cavation.
Incidental excavation 1;)1. ~.c~iioval of' ~~nsuitable material .;hall. unless i t is held to be excess excavation, bc ~llcns~!~.cil as tlie volumc ordered hy ~ I I C Prqjcct Manager to be excavated beyond the nolii~r~al t l i r l ~ ~ ~ ~ i . ; i o ~ ~ s ol'trc~icll cucnvaticln allLl ,hall include for the disposal of the excavated malcr.i:~l ol'l' llre site ;111d for rc'filli~ig lIic ~~uc:iv;~tion with approved material emanating from 11.c1icIi c ~ c a v a l i o ~ i clscwllcre.
Excess excavation i~rid [lie hackfillill: 1IicrcoSsliall 1101 bc l~ieasurcd for payment.
Concrete refill (c\clutlin:~ I~cclclili_c and s~rrround) to sue11 Icngtlis of trench excavation as may be ordered by 1 1 1 ~ ~ I)rojc,c~ hl;l~i;~gc~. sliall be ~iicasurcd as lI1c volume of concrete required to fill
- Thang L,o~ig 1nfiastrucl~11.c I ) c \ CIOI~ I I IL~ I~ I .loill[ ~ t o c l ~ C ' O I I I ~ : I I I ! (Il~fr:t-'I I . I I I ~ L ~ I I ~ ) 182
VIETNAM URBAN UPGIIA1)INCi PI<O.II :Cl NAM DIN1 I LJlIBAN I 'PGRADING SUB-PROJECT Phase 11 Enironmental Impact Assessrnc~~t (1,:IA) -- April 2009
such lengths to the depth ordered and to the nominal width of the trench, a deduction having been made for the volume occupied by the pipe and shall include for any formwork required and for disposal of additional surplus material.
Surface reinstatement of trench excavation in roads and in footpaths as specified shall be measured as the area calculated by ~nultiplying the length of trench excavation to be so reinstated by its nominal width. The stripping of the top surface and the surface reinstatement of trench excavation in open land shall be included i n Irench excavation and shall not be separately measured.
Crossing services shall include for all temporary measilres for dealing as specified with service pipes and cables of any size and shall be measurc:l as the length of services dealt with within the nominal width of trench excavation only as may be itemised in the Bill of Quantities will be measured.
Embankments Items for forming. embankments sllould generally compl) with the requirements of Clause 7.3 and shall includc f i ~ r thc loading, haulage. unloading, sl>!.cading: compaction and shaping of material from rcclui~.ed excavation, all as specified.
Items for 'free draining lill' or other special fill material illall include for the supply (whether from an external sourcc or from excavated material 11!.1cessed by the Contractor) and for placing, compacling and sllaping ot'nlaterial all as specificd.
Embankments shall be measured as the volume after compaction of material placed to the limits and depths shown i n the Drawings. The Contraclor. shall be deemed to have made his own allowance for any 'loss' of material into the ground l>~.low the embankment.
Top soiling ant1 grassing Items for 'Top soiling' shall include for obtaining topsoil from temporary spoil tips on the Site, hauling and spreading all as specified.
Items for 'Grassi~lg' shall includc for all work in conlic.iion with grassing as specified, but excluding any apl>lications ot'l'ertiliscrs.
Top soiling and j:rassing shall be measured as r1.c superficial areas so treated, and
except where cspressl) indicated otherwise items sl~.!:l apply to sloping as well as to horizontal surfaccs only where itel11 i s in the Bill ofQua111ilies.
Testing Except where itellis are provided specifically for testin:, of earthworks, the cost of testing, including obtaining samplcs, he i r handling and transpor!..iion and the provision of test results all as specified. sllall hc tlccmcd to hc included in the ratc.5 lor e;irthworks.
.~
T h a w Long Infrastrucluru I ) C \ C I O ~ > I I I C I ~ I .Ioillt SIOLL ('ornp;my (Infr;~-'l I.:tngi,ong) 183
VIETNAM lJRBAN IJP(;RAIIING PI<O.IECl NAM DlNH lJRBAN I ['GRADING SUB-PROJECT Phase I1 Enironmental Impact Asscss~l~cl~t (EIA) April 2009
TECHNICAL SPEC1 FICATION - DREDC INC
1. Scope 1.1 Scope and Location of' Dredging Works
Dredging shall include, but not necessarily be limited I:), the furnishing of all equipment, labour, supervision. materials, consumables and expertise For execution of dredging works in defined areas of P ~ L I Loc river. Construction of floating or submerged pipelines, if used, 511all be undertaken by the Contractor using his own skilled labour. Responsibility for the in>tallation, operation and subsequent removal of the pi pclillc sh:lll rest entirely with the Contracior.
1.2 Description of Dredging Works The dredging worl;s covcred by this Specification comprise works to dredge the Phu Loc river. Dredged inaterial shall be conveyed in barges or pu~nped or tank truck varying distances from the dredge sites, ~ ~ s u a l l y to be used to raise river enil-nnkments at locations shown on the Drawings, or to disposal arcas as determined by the Projcr! Manager. Dredged material includes 2 type (i) top sludge, which is contaminated by heavy metal and need to be disposed of at tlic Khanh Son landfill and (ii) It: .ver soil, which is mainly fine sand.
2. Reference Standards Dredging works shall bc ~.uecuted in accordance with t!:c current regulations issued by the relevant river authority, or the relevant Vietnamese Stand~irds.
3. Submissions from Cont r :~c to~ . 3.1 W o r k Programme
Before any equip~nent is b r o ~ ~ g h t to Site, a detailed dredyi::g programme, including particulars of dredgers, and all otlicr crli~ip~ncnt which the Contracto proposes to use, shall be submitted to the Project M a ~ l a g e ~ li)r his appro\al.
3.2 Method Statement Prior to the coni~ncncemcnt of' drcdging the Contrac!,~~ shall submit a detailed Method Statement to the I'roject Manager f o ~ his approval. The hlethod Statement shall show clearly how the Contractor ploposes to calry out dredging according to his dredging work
7 7
programme. I he Contr~ctor shall include all details on tile operation, such as movements of the dredger, length and witlth of each individual cut, and tlcpths of cut. Should the Contractor find it necessary to alter 111s method of operation during I ! ~ C p~ogress of these works he shall, within 14 days p ~ i o r to intended i~nplementation of t l ,c revised method, submit a revised Method Statement lo llic 1'1o.ject M:lnage~ for approval.
3.3 Dredging Records The Contractor sl~all 111al;c and keep records of all drcd;liilg and shall submit copies of these records in an app~.ovctl fi)r~n, daily 01. weckly or at such oll~er intervals as may be required by the Project Mannyc~..
The Contractor sll;lll :~lso sub~iiit proposals. rcports. rcco:,.! .. clra\cings, schedules, and the like as required for tllc ~~cl~li~l.rn:~iicc and rcco~.di~lg of tl:: ,Ircdging and placing material as hydraulic fill.
The Contractor's o b l i g a ~ i o ~ ~ s L I I I ~ C S tlic Contract include i 111 are not necessarily limited to the following:
- Schcdtllcs li)r .;u~.\icys. dredging activities, conipl: ion of individual dredged areas, and final co~nplctiorl l i~ r I~arlrl-o\,cr.
- Tlie pcrl'o~.mancc. ol'drcclgcrs and daily and wcckl! ~>l.oduction figures.
Thang Long Infi.ustl-uclurc I ) C \ . C ~ O ~ ~ I : I C : ~ I . ( o i ~ ~ l stock < ' O I I I ~ ~ , ~ I I ! ( I ~ ~ I . : I - ' I :.:ir~gI.ong) 184
VIETNAM URBAN IJPGRADING PICOJECT - YAM DINH lJRBAN I 'PGRADING SUB-PROJECT Phase 11 Enironmental Impact Assess~ric~~t (KIA) April 2009
- Drawings showing areas to be dredged, survey drawings and documents including specifications, data, lists of equipment and methotis used.
- Schedule of perlormance tests and procedures. - Monthly progress reports. - List of Constr~~ctional Plant andlor Contractor's cquip~nent proposed to be used in the
following operations: a) Dredging b) 1'ransport::tion of dredged materials c) Discharging of dredged materials d) Placement of dredged materials for emba:iiiments or other land disposal areas e) Constr~~ction of containment elnbankme111\ f) Disposal of top sludge
- ReportIRecords a) Tide gauge measurements b) Benchmarlis for horizontal and vertical co!~trol o f the works
- Drawings a) I're-drcdge surveys b) Disc11arg.e locations and disposal areas, In! outs and surveys c) Records oi'interim surveys during dredgi~tg d) Post-drc~lgc surveys
4. Survey a. Tidal Datum
The Contractor ~ l i n l l pro\iide, install and maintain a ternj.orary visual tide gauge at least 4 m long and 200 mtn \vidth !lraduated in centimetres and (! ii~netres, at a location on Phu Loc river, as approved by tllc I'roject Manager. The gauge sl. . l l be levelled in and correlated with the land survey d a t ~ ~ m . l'he tide gauge shall be removed on completion of dredging works unless otherwise agreed \vil h the Project Manager.
b. Topographic Survej The Contractor shall be ~,esponsible Tor establishing the d:lrum to be adopted for the control of dredging work along with the position-fixing system suita!lle for the positioning of his floating plant and his hydrograpllic vessel as required by the Project Manager. The system shall have a static accuracy 01-3 100 tun1 or bettcr. Shore stations or I1c;lcons relating to the position-fixing system shall be placed in approved locations and their p:~sitions shall be surveyed in to the land grid or basc Iitic ~ ~ s c d lor the Works to tlic approval i s ! ' the Project Manager.
In addition to thc initial survey of existing land prior to sl;lrt of the discharges of hydraulic fill, for raising river or canal embankment, the Project Ma11.1ger may require the Contractor to undertake other surveys of the designated discharge arc:,\ from time to time. Such surveys may include. but t~ot necessarily hc limited to level\ of containment embankments and indicators of disl>laccmc~lt .)I. subsoil movelnents.
c. Hydrographic Su rvcy Unless otherwisc ct)\,crc~l ! ~ y topoyr.;!phic surve!,. to the ..,~l>ro\,al of the Project Manager, the Contractor shall C;II.I.!. O I I ~ I.ydroyrnl>liic survc.!:s in the p~.; ,.nee of the Project Manager for the whole of tlic :~rc:~s to be ~lredg,ccl, hefore the corntnenc.,.!nerlt 01' any dredging works. The results of thi.; pr.c-d~.cd:rc. sur\,c!, \ \ i l l form the basc ' : I I C (MC 0%) for the purposes of measurement.
Further survey shall I)c t.;~~-ried out on completion of cat.11 sub-area. The results of this post- dredge survey will li)~.ni llic tinal co~ldition (MC' 100%) 1111. the purposes of measurement. The Contractor shall ~~ndc~.ta!ic other surveys in the presc1::c of the Prqject Manager at such intervals and si~cli I l l i l l l l lCI . :IS dircc~ed. for the p~~rposes ~~ 'es tabl is l i ing quantities for monthly applications lor pa!,mcnl.
Thang Long Infrastruc1~1t.c I )c\ ~.loll!nc!l( Soilll Stock Cornpan! ( I r ~ f r : ~ - ~ I i . . , ~ ~ g l . o n g ) 185
VIETNAM URBAN tJPGI<ADINC; PI<O.II:C1'NAM DlNH IJRBAN I 'I'<'IRADING SUB-PRO.IECFP Phase 11 Enironmental Impact A S S ~ S S I I I C I I ~ (CIA) April 2009
The Contractor sliall submit to the Project Manag.. for his approval and prior to commencement of any prc-dredge survey works, his pi,)posed survey plan and method of surveying the dredge areas and discharge areas as desipilated by the Project Manager. He shall also submit his plans for carrylng out interim and post-dredge surveys. The Contractor shall state in his proposed methods the water depths to \\liich he will be able to carry out the survey works with topographic techniques and sound!.~g and with the echo sounder, as specified.
For echo s o u n d i ~ ~ g the Co~ltractor sliall provide a suitablc hoat, co~nplete with crew, equipped with a dry paper recording dual frequency echo sounder, I , liich may be read to an accuracy of *lo0 mm, or an electronic digitised system of similar ai,curacy. The echo sounder shall be either a dual frequency instrument having pulse frequenc'cs of 30 kHz and 210 kHz, or other single frequency instrument having a pulse frequency i : ! the region of 30 kHz, in order to obtain reflections from tlie firm dredged bottom. The ccho-sounding equipment shall be operated by experienced hydrographic surveyors or othc: suitably qualified personnel as the Project Manager may permit. All equipment and perso~i! .~-l required for sounding and survey operations shall be supplied by the Contractor.
The echo soundcr sliall hc calibrated by means of the ba. :heck method at the beginning and completion of each surveying period. Calibration shall t;::,c place in the same area of water in which the soundings are to be made. and the bar, which ,..:all be of an a type approved by the Project Manager. sli:~ll bc lowcl~etl in steps of 0.5 m vtween the anticipated shallowest sounding level and tlic :uiticipatcd deepest sounding Ic\ :I required. Bar calibration of the echo sounding equipment sliall bc carried out prior to the commencement of each day's surveying and ar such other times as the Project Managci :nay direct and the corrections shall be agreed betwccn tlic Contractor and the Project Manag<;.
No echo sounding sliall be taken in water depths l e s than those recommended by the manufacturer of the equipliient i~scd or over slopes s t eepa . than I vertical to 4 horizontal. For these locations :I calibratetl pole. tape or chain with an ~ . :>p~ .oved bearing foot shall be used. Where water dcl)tlis I~eco~iie too slinllow for an echo so .lider, measurements shall be made with a lead line or soir~iding pole. The lead line shall i, ~ ~ i s i s t of a flexible, non-elastic line (wire), attached to a steel plate, as approved by the Prc : c t Manager. The lead line and/or sounding pole sliall he 11inl.kcd at 10 cm inter\i;~ls. The (.; cra11 length and the position of the intermediate di\ isiolinl ii?;uks sliall be checked before isc with a good quality steel tape measure, sub.jcct 1 0 ihc approval b!, tlic Projcct hlanager.
Sounding runs sliall I7c made across the dredging area,. at 20 In intervals, or otherwise as agreed.
d. Interpretation of' ICclio Sourlcling Itecords The dual freq~lc~icy cclio soi~ntlcr. as speciticd. \ \ , i l l proi..;cc two traces. The trace from the 210 kHz pulse will sliow low density fluid niiltl. whilst ::c trace from the 30 kHz pulse will show the drcdycd bolto~n. All prc-dredge :~nd post-drcc. : s ~ ~ r v e y s shall be based on the 30 KHz trace.
e. Hydrographic Survey Itecortl Dr:~\virijis ot'L)~.ctlgecl Arcah After each survcy. tlic ( 'o~~tractor sliall immedi:i~cly prel,!!c clra\vings recording the results of the survey in the Ior~ii ol.l~lans to a scale of 1:2,000 and C I ~ I S S sections. Contour drawings sliall I7e prepared to a scale 1 :2,000, 01- .:.; otherwise approved by the Project Manager. The dra \v i~~ys <hall slio\\. the depth contour, . ~ t 0.20 In intervals referred to the datum level.
Thang Long Infrnstruc[urc I)c\ ~ . l o l l i n t . ~ ~ t .loin[ s [ ~ c k C'onil7any (Infr:~-.I . :lugl,ong) 186
VIETNAM URBAN I,'I'(;RADIYG I'l<O.lECI XAM DlNH URBAN I 1'c~RAl)lNCi SIJB-PROJECT Phase 11 Enironmental Impact Asscssr~~cr~t (EIA) April 2009
The post-dredgc survey drawings sllall clearly show thc location of cross-sections used for measuring the material removed by dredging. The cross-i;:ctional profiles shall be plotted to a suitable vertical and horizontal scale as approved by the i,:.oject Manager (for example: 1 :I00 vertical, 1:5,000 horizontal, or similar) and shall be clc.~rly identified. The location of the cross-sections shall be shown on the pre-dredge survey d:- wings from which the original pre- dredge contour lines are scaled fbr use on the profiles.
All survey plans shall sho\v coordinates of lines on a :,:-id system approved by the Project Manager.
f. Survey and Record Drawings of Disc11;irge Areas The Contractor shall ~~ndertalce surveys of discharge area .IS provided for under Clause 4.4.2. After each survey. thc Contractor shall immediately prel ' e drawings recording the results of the survey in the form of plans to a scale of 1 :2,000 and o\s sections to a scale approved by the Project Manngcr.
All survey drawings shall show the embankment filling ii~nits referred to the lines shown on the Drawings and as approved by tlic Project Manager.
g. Sweeping of Dredged Arcas On completion of dredging of a sub-area, the Contractor &!!all sweep the whole of the dredged sub-area to conlirm that the bcd is everywhere within ,lie dredging limits as specified in Clause 5.17.
This sweep shall be carried out by nieans of a rigid hori zL)ntal bar suspended at the dredging depth from a suitable vcsscl in the presence of the Pro;:ct Manager. The Contractor shall remove all obstructions and high spots revealed by this s\\ ..cp.
5. Dredging 5.1 Scope The work covered by tllis Ipnrt 01' the Spccificatinll consists o l i'urnishing all Constructional Plant, equipment, labour, s~~pcrvisoi-y s~aff , appliances. materials, a ! . I in performing all operations in connection with the dredging and discharge works to the ex cnt and levels established by the Contractor and confirmed by the Project Manager from the PI<.-dredge survey of the areas to be dredged and discharge locations tb~. emb:~nk~nent raising, as she\\ O I I the Drawings.
The areas to be dredgcd are at P ~ L I Loc river as shown on the I',.a\vings. Dredged material shall be conveyed by barge or purnped of tank truck varying distances fro111 the dredging area to the designated discharge areas for ilsc in raising embankments as shown on ti,.: Drawings or to disposal areas as determined by the Project Manager.
The Contractor shall provide the pipc and all necessary fittings : l i l consumables, jointing equipment and the like for any pipeline ~lscd. Constr~~ction of all land, flc :ling and submerged pipeline under navigable channels shall bc tllc rcsponsibilit!, of the Contractor.
The dredging proglxmmc is constraincd by:
- Tlic ti i l :~I co~i~litii)ns i 1 1 1 '11~1 L.nc river - GcoIo;!.\ co~l!lit ion. - Ha~lI t l i~~y. r1-;1!1. ~~ortatioll :~nd disposal of dredy . 2.1 top s l ~ ~ d g e and lower soil
Top sludge shall hc tlislposed of at the Khanli Son landti! \vliicli is at about 15km away from the dredging site. I>isclla~.ge locations, which are to ; x c i v e drcdged materials, shall be embanked prior lo ~l lc star[ of discllarges to prevent drai,..~gc water reaching the surrounding
cultivated land. A fall shall be maintained across the ar~.;l from the point of discharge to the outfall at all t i~ncs so as to ensure rapid dewatering. Dr:r:~iage discharges to the river shall be to the approval of thc relevant river authority and as agrec.1 with the Project Manager.
With consideration of the constraints on dredging o u t l i n ~ ~ i above. the Contractor shall provide a suitable dredger, able to best perform the dredging specilied.
5.2 Access to the Site The Contractor sllall be dcemed to have made his own , ~ q ~ ~ i r i e s regarding the suitability of the dredging cqu~pnlent he intends to use for the Works, 11d for marine access. Assistance to the Contractor to obtai~l :In>, necessary permits will be prc idcd by the Employer.
5.3 Working Hours The Contractor \vill be permitted to carry out dredging ivork 7 days per week provided no complaints are received. Adequate lighting shall be pr.c'\vidcd for work during the hours of darkness. Safety precautions against accidents, injury a~:. l loss of life to all persons involved in the Contract or ~ n c ~ n b c r s of the pl~blic shall be given cl'fective and proper consideration by the Contractor strictly in accordance the regulations i n t;irce in Vietnam, and to the approval of the Project Manager.
In the event of ally co~npl:~~nts, the Project Manager shall ' )c informed in writing immediately. The Project Manager will promptly convey the compla i~ ,~ to the relevant authority to resolve the matter. Drcdg~ng \\ark will not be permitted on llational holidays unless otherwise approved by the I'roject Manager.
5.4 Horizontal Setting 0 1 1 1
The Contractor shall be rcsponsiblc for establishing a pc ,,ition-fixing system suitable for the positioning of his floating plant and his hydrographic ve..~~cl if used. The system shall have a static accuracy ol'+I 00 mnl or better. Shore stations or O-,acons relating to the position-fixing system shall be placcd in approved locations and their : . isitions shall be surveyed in to the base line to tllc approval ol'tlie Projcct Manager.
5.5 Dredging Methods The Contractor sli:~ll sul>~nit to the Project Manager fo: ~~pproval , at least 14 days prior to commencing the ~nobilization of any plant, his proposccl method and sequence of dredging, details of equipment. proposed routing of land and submc: ;!.cd pipelines, method of placing the dredged material in cmb:mkments. 11otices to the relevant .~~~t l ior i t ies and his proposed method of lighting ar~d m ~ ~ r l ~ i n g . The methods proposed shall bc :~pproved by the Project Manager in advance of any \vorl; bcing started and shall be such ::. \ \ . i l l ensure the completion of the Works in compli:~nce \vith tlie approved program ant to the satisfaction of the Project Manager.
The method of rlrcdging. and transporting materials shal he such as to avoid any deposition that may interfkrc \\it11 ~~:i\,igational requircnlcnts, in I l l ~ . i \ c r channels around the dredging sub-areas. In tlic c\ cnt oI '~~navoidal~le scttlcmcnt of scti: I C I I I S to s ~ ~ c l i an extent as to impede navigation of the ~ . i \ , ~ r cli:~li~lel. tllc C'onti.;~c~or shall. I o\\ n expense, immediately restore the affected ch~111nc.l 10 its oriyillal depth to thc sati~.i ..-1io11 ol' the Projcct Manager and appropriate river ;~~~ t l io~ . i t i c ..
The Contractor ~ I ~ : I I I inclt~ Ic p~-ol>os;~ls for routiug ot' pi -li~lcs ill his Method Statements in accordance with C'lausc 3.1. All pipeline routes sh:: 1 hc subject to the environmental constraints c o ~ i t a ~ llccl else\\ here in this Specitication, ant1 ha1 1 be subject to tlie prior approval of the Prqject M ; I I ~ ~ ; : ~ I , .
VIETNAM URBAN UI'GIt/\DING PROJECT NAM DlNH IJRDAP! i 'I'CiRADING SUB-PROJECT Phase 11 Enironmental Impact Assess~ne~~t (EIA) -. .4pril2009
The Contractor shall exercise particular care to ensure tliki~ any pipelines used for transporting dredged material do not interfere unduly with naviga:;:~n and fishing activities and such pipelines shall be marked and provided with warning l ig : .~s to the satisfaction of the relevant river authority.
The Contractor shall be deemed to have satisfied himseli' before tendering as to the distance between sub-areas to be dredged and the designated disc:~arge areas and shall include in his rates and prices for dredging, for the conveyance of dred;~ :cl material from any part of the sub- areas to be dredged to any part of the discharge loca t i i . .~~ . No claim will be entertained in respect of length of pumpi~ig between the dredged sub-..I-cas and the discharge locations, as specified or as shown on the Drawings.
The rates for dredging and disposal shall include for all : .nporary moorings, stagings, supply and laying of pipework, tilling to form temporary and p8:rmnnent embankments at discharge locations and any other.works necessary for carrying out ~ l i c dredging operation in an efficient manner. The rates shall duly allow for the removal 0 1 ' : I I I such equipment, pipeline, cable moorings, stagings and the like, and any site cleanup of i vdrocarbon spills, on completion of dredging.
5.6 Maintenance of C'r;11'1 The Contract01 \hall at all times (luring the progress f the Works provide, operate and maintain in proper working condition to the satisfaction t "the Project Manager, all necessary dredger(s), ba~gcs. piping. valves, tugs and other flo, 112 craft, surveying and sounding equipment neceswr) for the e\ecution and completion oi I: Works
5.7 Provision of Matcri;~ls, Stores, Equipnicnt and Cra f t The Contractor sliall be responsible for the provision 0 1 i l l matel.ials, stores, equipment and craft necessary lor tlie satisfactory execution and c o m p l e ~ ~ In of the dredging work.
5.8 Materials to be DI-crlrrtl The Contractor \hall be ~.csponsible for the dredging an( ~.e~noval of all materials as may be necessary for acliie\.ing tlie depths. widths and slopes . ,lo\vn in the Drawings, using such dredging equipment as is most suitable for dualing with ' : ; c 111ntel.ials involved in accordance with the Specificr~tion.
5.9 Objects Encounterctl Unless the Pro,iuct Manager othcr\cisc directs. all objeci ~~~lcountercd during dredging work shall be lifted. rc~l~o\ ,cd and disposed of by the Contracto:
5.10 Navigation in I'llu 1,oc Itiver The Contractor sliall so conduct his dredging operation.; :I:I~ no undue interference is caused to navigation i l l ~ h c I'hu I,oc River.
The Contractor slinll include ill liis survey of tlie who1 0 1 ' the ~ u c u to be dredged prior to commencelne~it ot'tll.edgi~ig and i n l~ i s post dredge survi . as specified, a survey of the river reach in the \iici~~it! of tllc proposeil confli~ence with t h l . :~lll?roach canals, to the approval of the Project Man:~;:c~..
The pre-dredge SIII.\C!, ol'llle rivcr \ \ / i l l be rcco~.tlcd hy .(. I,:niploycr with the relevant river authority. l'his data sI1;1Il be regarcled as the base-lin~, :olltlition at the commencement of dredging. A n y accrctio~i ol'sedi~ncnt i n the rivcr. f i o ~ n s ~ : :ricrged pipelines or otherwise, over and above that to he osllccted nat~~rally, deemed hy the r ~.c,icct Manager to be attributable to the Contractor's drcdp,i~ig operations shall be rc~novetl ,! tlie Contractor to the designated discharge areas aliii incml.po~.nted ill tile e~nbank~~icri ts 01. ! C :I ili.;lx)snl area at his own expense.
5.1 1 Disposal of l)~.ctl::ctl M:itcrial
Thang Long 1nfias1uuc1~11.c I )u\ ~,lopi.ic'11 .loilil S t k l ~ . k C'clmp;in: (infr:~-'l . . ~ l g l . o ~ ~ g ) 189
VIETNAM lJRBAN IJI'(III,\DlNG I'IIOJECT- NAM DlNH IJRRAN I I'(1IIADING SIJB-PROJECT Phase 11 Enironmental Impact Asscss~~~cnt (EIA) April 2009
Top sludged shall bc separated and disposed of at the Kha.111 Son landfill All other dredged ~natcrinl shall be deposited in thc Jcsignated discharge locations for embankment construction, which are located as shown 01. :lie Drawings or to disposal areas as determined by the Project Manager.
The Contractor shall supervise the construction of all c o ~ i ~ ; ~ i n m e n t embankments and drainage arrangements, and shall conduct all hydraulic f i l l operat i , : I IS so as to obtain the best possible results. The l a y o ~ ~ t of the discharge areas will be ihe resl,~:i~sibility of the Contractor and shall include settling ponds to ~ ~ l l o w the materials in suspeli?,,,)n. formed by the slurry from the dredging of the sol? clays and silts, to settle out, before I . I C drainage water is returned to the river via the o~ltl';~l I.
The containmc~~t e~nba~ ik~nen t s may be constructed i ' ~naterial taken from inside the embankment arcas prior to dredging. The height of thest: containment embankments shall be sufficient to contain the dredged material in its suspendb:.l ~~nconsolidated state, with at least 0.50m freeboard against risk of overflow. The embank11 lits sliall be such that the slurry will not seep into the adjoining water body or land areas. 1'1 2 embankments shall be stable with adequate widths and sidc slopes to prevent failure. If le:!i .!g,c of drainage water from material discharged or fro111 any otli,:r source occurs, such as flootl::lg or rainfall run-off, the Contractor shall be responsil>lc for cleaning the area affected to the .tatisfi~ction of the Project Manager. Any such reparation sh:~ll be entirely the responsibility (.! ' tlic Contractor and shall be at his cost. In the e v c ~ ~ t of a major leak from the pipeline, thc :'olitractor shall stop dredging until the problem Ilas I1cc11 rcctiticd.
Boundaries of the desig~iatcd discharge areas for emball:. 11ic11t raising and disposal areas are given on the Drawings. The discharge arrangement pl:, sIiaI1 be submitted to the Project Manager for approv:~l \vitliin 30 days after the commencc..;cnt of mobilisation.
The Contractor shall p~.o\,ide and ~naintain continuo^^‘. ,:liysical security around the outer perimeter of ol l S L I C I I I;11itI discharge areas to prevent the -:I [ I .> . of persons or animals into the area of 'acti\,c' Jisl,osal operations. Particular care shal hc talcen in the vicinity of village settlements and isol:~ted l io~~ses to prevent the entry of ci.:lcl~.c~i. The Contractor shall include proposals for sec~~r i ty 01. tlircharge and disposal areas i ~ i is ~iiethod statement as mentioned above.
No separate pn ) ,~ i i e~~ t sli:~ll be made in respect of s~lch 5: . l ~ r i l y arrangements, which shall be deemed to be incl~~dcd il l llic rates for dredging.
5.12 Spillage of Drrtlgctl M:~Li,rial during Transportation The Contracto~ sliall take :dl necessary precautions to p1.l.. . III (lie spillage of dredged material during transportation alitl \ \ , i l l be responsible for tlie su! .yuc~it removal of any such spilled material to the apl>rovcd designated tliscliargc areas or d i ~ . , \ls:!l area at his own expense.
5.13 Interruptions to Wol-lc The Contractor sl~all allo\\: in his rates for any loss of \+,;. Iki~~y time due to weather, river and tidal conditions ;iritl tlisruptions as a ~.c.sult oScompl:~ints ; .,-i\.ctl and their resolution.
5.14 Clearance oI'Sitc O I I (3o111l)letion At the complct io~~ ol'tli~. ( 'o~itract , t l ~ e C'ontr:~ctor sllall I . ' ~ ~ o \ , c all anchors, chains, wires and any other cqui11111cnt p l a ~ ~ t or ~n:~terials i~itrotluced. \ I I ! soil contamination directly attributable to tI~.ccl::i~ig ol~c~.:itio~is. Ix)tIi inside ant1 our !L 0 1 ' discharge and disposal areas, shall be asscswil L I I I ~ I c lca~~ct l LIP by the Contractor. 'l'lic \ I ~ I ' a l l such clearance and cleanup operations sliall bc tlccmetl to have been included in tlie I.; 2.; ];)I. dredging.
The Contractor sliall keep complete records and lo;) 01' his dredging operations and transportation of the sediments in a form that shall be app, )ved by the Project Manager.
These records shall include delay times for the following: - Anchor handling - Floating pipeline - Land pipeline - Disposal area and construction of containment ern!, 11linlcnts - Mechanical breakdo\vn - P u ~ n p i ~ l g system - Clearance of debris - Others
The Contractor shall prepare a daily log sheet recording J I I events on the job site. The log sheet shall be to a standardised format approved by the I ' oject Manager. The log sheet shall include the fol lo\\ ing information:
- Profession:~l and othcr personnel present on the sit^. - Numbcrs and types of equipment on the site - Ready stock of fuel Sor the equipment - Dredging production during the day - Other activities - Materials dcliveretl to the Site - Weather conditionr. floods and other e18ents likely influence progress of work.
The Contractor shall malie two copies of each sheet for dc i\,ery to the Project Manager. 5.16 Weekly R e t u r ~ ~ s
Each week the Co~ltractor shall prepare a summary of wc, Ii carried out in the preceding seven days and submit copies to the Project Manager. The ..+,ccl,ly summary shall consist of a recapitulatio~l of activities recorded on daily log sheets aiid shall include a cumulative record of quantities entercci on daily log sheets. The weekly .,Lllnmary shall be to a standardised format approved by the I'roject Manager. The Contracto~ shall make two copies of each sheet for delivery to the I'ro-ject i\./lanager.
5.17 Dredging tolcl-anccs The tolerance on bed profile shall be 5100 rnm from thc ~ c l s shown on the Drawings. The Contractor shall at all times take all reasonable p r e c a u t i . , ~ ~ ~ to prevent over-dredging at any point. No material sliall be allowed to remain above : :c minimum dredged level. Land disposal areas, ifany. arc to trimmed on completion. Cor. ,~inment embankments are to be left with stable slopes and thc area occ~~p ied hy f i l l materi, lcli level and in a neat condition suitable for fi~ture ilsc for :~::riculture or aquaci~lturc on co :plction of the Works.
5.18 Noise The Contractor sliall reliain from i~sing equipment that I I ~ I ~ C S excessive noise, particularly during the l i o ~ ~ r s ol'darkness.
6. Tempora ry Wot.1;~ a. Contractor 's Wo~.ltinz Arc:~
The Contractor sli:~I l cst:~hlirli, in co~i~jr~nction \\ it11 tlic 1'1. :ct hlanager, river authorities, local authorities, lantlownc~~s :II~CI occi~piers. the locations of ::': thc ('ontractor's temporary marine facilities in cc~~i~lcction \ \ i t 1 1 dredging.
b. Watching And I , ig l~t i~lg The Contracto~. sllall, in connection with the Works. p:., ., idc and maintain at his own cost, buoys or otl~cr m:~~.licrs. liyhts, s ig~~a l s , alarms. sali.t~ , . . l i~il~ment, buoyancy aids, fencing,
guards and watchmen when and where necessary as required by the Project Manager or by any other duly constituted authority for the protection of the Works, materials and personnel. The Contractor shall undertake Temporary Works required and provide materials for the proper indication of submerged work or the moorings of the Contractor's water craft or for the safety and convenience of river users, or of the public. The Contractor shall indemnify the Employer from any damage, loss or injury caused to third parties by the Contractor's failure to provide or in connection with providing of lights or other markers.
7. Measurement For Payment 7.1 General
References in this sub-section to "items" shall mean items in the Bill of Quantities. Payment shall be made only through the items provided in the Bill of Quantities. The rates for dredging shall include for discharge at locations specified, forming embankments including containment embankments, and all temporary moorings, stages, supply and laying of pipework, and any other necessary works for carrying out the dredging operation in an efficient manner. The rates shall duly allow for the removal of all equipment, cable, including pipeline, and any cleanup of material spillages and hydrocarbon spills at the completion of dredging.
7.2 Mobilisation And Demobilisation Items relating to general mobilisation shall include bringing to Site, setting to work, operating and maintaining, and demobilisation of all Constructional Plant and all types of equipment, including ancillary and associated equipment in connection with dredging work.
(i) Dredging Items referring to dredging, except where indicated, shall apply to excavation of material from the areas of the river bed and adjacent land as shown on the Drawings, and discharge at the approved locations.
(ii) Dredging quantities The Contractor's rates and prices in the priced Bill of Quantities shall include for dredging in all materials, pre-dredge, intermediate and post-dredge surveys carried out, and for transportation or pumping the dredged materials through a pipeline (hydraulic filling) or tank truck to the disposal locations, as specified or directed by the Project Manager. The removal and disposal of foreign objects or obstructions found in the river will be deemed to be included in the Contractor's rates and prices.
Measurement of dredging quantities shall be by volume dredged, within the limits between the maximum and minimum dredge levels given in Clause 5.17.
During the execution of each dredging sub-area, the Contractor may make monthly applications for payment subject to the minimum amount of interim payment certificates given in the Contract. Monthly applications for payment may be based upon surveys undertaken during the dredging of a sub-area in a manner as may be agreed with the Project Manager. The difference between the levels given by the pre and post dredge sounding surveys, as specified in Clause 4.3, shall define the measurement of volume dredged in each sub-area. Any over or under measurement of volume resulting from such interim surveys shall be taken into account when the post-dredge sounding survey of that dredging sub-area is agreed between the Contractor and the Project Manager (MC 100%). Any over or under payment shall be adjusted at this time.
The Contractor shall be deemed to have included in his rates for dredging for any accretion of sediment between the pre and post dredge surveys. No additional payment over and above that derived from the difference between pre and post sounding dredged surveys of a dredging sub-area shall be due to the Contractor.
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(iii) Over-dredging No payment shall be due to the Contractor for dredging below the maximum dredge levels shown on the Drawings and as specified in Clause 5.17.
(iv) Discharge Locations Items for placing dredged fill to form embankments or containment embankments shall include for construction or maintenance and operation of temporary spillweirs, outfalls and all other drainage facilities.
There will be no separate payment for the provision and maintenance of perimeter security around disposal areas, which shall be deemed included within the rates for dredging.
(v) Interruptions to work No payment will be made for standing time occasioned by interruptions to work for any reason.
8. Environrnen tal Control 8.1 Introduction
This sub-section covers the general environmentai requirements to be followed during the dredging operations.
8.2 Environmental Constraints Dredging is to be performed strictly in accordance with the prevailing regulations regarding contamination of river waters and agricultural land. It is important that dredging activities do not create excessive turbidity which unduly impacts on the existing local fisheries so as to adversely affect the livelihood of those dependent on fishing. The Contractor shall indemnify the Employer from justified claims as a result of loss of income for local residents from fishing. Preventative measures against contamination of cultivated land, by the raising of containment embankments around the discharge locations, the provision of effective drainage arrangements, and good dredging and transportation practices shall be followed by the Contractor. Mitigating measures to be taken include those described elsewhere in the Specification. Dredging methodologies and timings shall be submitted to the Project Manager before commencement of dredging works. Specifically, the following environmental conditions will be enforced by the Project Manager throughout the execution of dredging works. In order to avoid as much unnecessary re-suspension of sediment as possible, the Contractor shall follow a work program and use equipment that minimises re-suspension of sediment around the dredger. The Contractor shall demonstrate to the Project Manager that his method of dredging achieves this aim and shall seek approval from the Project Manager prior to commencing work. Pipeline routes for pumping dredged material shall be selected to avoid undisturbed areas as far as possible. The pipeline alignment shall be subject to approval by the Project Manager, in writing, before it is placed in position or subsequently repositioned.
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TECHNICAL SPECEFICATION - PIPELINES AND PIPEWORK
1. Scope o f Work
This section of the Technical Specification covers the pipework and pipelines included in the Contract. These include combined sewers and drains, internal pipework and a pumping main for a wastewater pumping station, water mains, service sewers, house connections and road drainage systems. The works include but are not necessarily limited to clearing of the Site, excavation, foundations of pipework and auxiliaries, furnishing and installing to the required elevation all specified underground piping together with all fittings (including all valves etc.) and appurtenances, backfilling, embankments, connections to manholes and chambers, crossings in general, testing of pipelines and cleaning of Site all as shown on the Drawings or as required for a complete installation. 2. Quality Assurance a. Shop Tests
All pipe materials, fittings, sealing rings and other materials for pipeline network covered by these specifications shall be factory tested in accordance with the applicable standards. b. Witnessed Shop Tests Inspections at the manufacturers' facilities before andlor after the approval of materials will be required as set out in the Contract. 3. Approval of Materials 3.1 General No material shall be delivered to the Site unless the material and the manufacturer has been approved by the Engineer. 3.2 Product Literature Each submittal for the Engineer's approval shall be complete in all aspects incorporating the information and data listed herein and all additional information required to evaluate the compliance of the proposed piping material with the Contractual requirements. Partial or incomplete submissions will not be reviewed. Data to be submitted shall include but not necessarily be limited to:
I ) Catalogue data consisting of specifications, illustrations and schedules specifying the materials to be used for the various components and accessories. The illustrations shall be in sufficient detail to serve as a guide for assembly and disassembly.
2) Complete assembly drawings of fittings etc. with clearly marked dimensions. This information shall be in sufficient detail to serve as a guide for assembly and disassembly and for ordering parts.
3) Pipe schedule with the following information for all pipes and fittings: service, international complying standard or Vietnamese standard, pipe size, working pressure, and wall thickness.
4) Manufacturer's instructions for transporting, unloading, storing and installing pipes, fitting and other pipe accessories.
3.3 Certified Shop Test Results Copies of current authenticated test results in accordance with the manufacturing standard shall be submitted in accordance with the Contract provisions. 4. Demolition o f Existing Combined Sewers, Manholes and Gully Pots The Contractor shall demolish the existing combined sewers, manholes and gully pots as shown on the Drawings and itemised in the Bill of Quantities. The Contractor shall remove the sludge from the sewers, manholes and gully pots to be demolished and transport it to approved area for dewatering, treatment and disposal. The concrete and brick structures shall be disposed by the Contractor on his own tip, the location of the tip is subject to the Engineer's approval. The cast iron covers of the manholes and gully pots to be demolished shall be delivered to the Employer's store in Danang. The transportation ofsludge or cast iron covers will not be separately paid for. 5. Pipes, Concrete Box Sewers and Pipe Fittings 5.1 Concrete Pipes and Fittings
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VIETNAM URBAN UPGRADING PROJECT - NAM DlNH URBAN lJPGRADlNG SUB-PROJECT Phase 11 Enironmental Impact Assessment (EIA) April 2009
Unreinforced and reinforced concrete pipes and fittings with flexible joints shall comply with BS 591 1, Part 100; specification for unreinforced and reinforced pipes and fittings with flexible joints. BS 591 1, Part 103 shall apply for pre-stressed non-pressure pipes and fittings with flexible joints, if those are specifically required elsewhere in the Contract Documents. All pipes and fittings shall have gasket-type joints of spigot and socket joint or rebated joint. Pipes shall be inspected for shape, fractures or cracks passing through the shell or other defects and deficiencies. Any pipe, which is deemed to be unsatisfactory, shall be rejected. Repair of minor imperfections shall only be permitted upon approval of the Engineer. Concrete pipes for pipe jacking shall comply with the relevant provisions of BS 59 1 1 : Part 120 or equal. The Contractor shall ensure that the pipes can withstand the jacking loads to which they will be subjected during installation, without cracking or spalling. A certificate shall be supplied, confirming that the pipes are suitable for jacking and stating the distributed jacking loads, which they were designed. 6.1 Reinforced Concrete Box Sewers This work shall consist of reinforced concrete box sewer sections furnished and installed at such locations as shown on the drawings or required by the Engineer. In order to minimize the period of traffic diversion and restriction during construction, the Contractor may use precast concrete box sewer culvert sections approved by the Engineer. The Contractor may adopt in situ concreting method in places where sufficient working space is available without causing traffic diversion and restriction. Reinforced concrete box sewer shall be constructed in accordance with the dimensions as shown in the Drawings. Permissible variation in the position of the reinforcement shall be plus or minus 10% of wall thickness or + 10 mm whichever greater. Permissible variation on wall thickness shall be plus or minus + 10 mm. Concrete and steel reinforcement used in the construction of reinforced concrete box section shall be in accordance with structural specification and as shown on the Drawings. Box sewer sections may be repaired, if necessary, because of occasional imperfections in manufacture or accidental damage during handing and will be acceptable, if in the opinion of the Engineer, the repairs are sound and properly finished and cured and the repaired sections conform to the requirements of the specifications.
6. Manholes 7.1 General Manholes shall be constructed at the each change of gradient or direction, insertion with other sewers as shown on the Drawings or as directed by the Engineer. All manholes shall be provided with manhole covers as shown on the Drawings. 7.2 Concrete Manholes The lnanholes for concrete sewers shall be either pre-cast or cast in situ type as shown on the Drawings. Where the finished surface is situ concrete, the concrete shall be Grade C35 with a fine finish. The manholes to be provided with step irons or ladders are shown on the Drawings. Pipe joints to manholes shall be made so that required jointing material, as specified on the Drawings, completely fills the joint cavity. Any surplus material extruded inside the chamber or shaft shall be trimmed off on completion. Manhole inverts and benching shall be formed of the materials detailed on the Drawings and where there is no change of diameter, the invert shall follow the same gradient of the outgoing sewer. Manholes and chambers shall be substantially watertight, with no identifiable flow of water entering the manhole or chamber. Manhole covers and frames shall comply with the relevant provisions of BS 497: Part 1 and have a minimum clear opening of 600 mm. All manhole covers shall have hinge or s i~ni lar protection device. On vehicle traffic areas, the covers and frames shall be designed for heavy traffic loads (i.e. 40 ton minimum). The frames shall set to level, bedded and haunched over the base and sides ofthe frames in 1:3 cement: sand (by volume) mortar or as shown on the structural Drawings. The manholes on vehicle traffic areas and where specifically shown on the Drawings shall be provided with 900 x 900 mrn cast iron frame. In other applications the frame may be circular. The cover castings shall bear the Employer's name in Vietnamese
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Thang I.ong Infrastructure Development Joint Stock Company (Infra-1'11angLong) 195
The method of backfilling and compacting around manholes shall be as for the pipe trenches. Care shall be taken to raise backfill equally around the manhole shaft to avoid unbalanced lateral loading of the structures. The log grooves of stoplog manholes shall be provided with stainless steel, AlSI 304 or equal, U- beams, wall thickness not less than 5 mm. The timber for the stoplogs shall be group 4 wood according to Vietnamese standards. 7.3 Gully Pots Gully pots shall be constructed at the locations shown on the Drawings or as directed by the Engineer. The inlet connections to gully pots shall be reinforced concrete as shown on the structural Drawings. The inlet gratings of the gully pots including the fasteners shall be either hot dip galvanized carbon steel or bitumen coated ductile iron. Where exiting gully pots shall be renovated as shown on the Drawings, the works shall include replacement of the existing covers, desludging of the gully pots and complete internal plastering. Inlet gratings shall be provided for the gully pots to be renovated where shown on the Drawings. 7.4 Discharge Structures The discharge ends of sewers shall be provided with protection structures made of concrete or stone masonry. The type of structures for each location is shown on the Drawings. The structures shall comply with all respective requirements of concrete works, materials, reinforcement and formwork a s specified in the Technical Specification for Structural Works. Stone masonry construction for protection of discharge end from erosion shall consist of quarried rock, bonded together with cement mortar. Walls shall be built in random rubble to proper course. Walling shall be built from stones selected from the pile so that each stone in any course is of a similar height to give a flat horizontal bed. All stones shall be wetted, set in full bed of mortar and all joints filled. No fallow beds to be allowed. The joints shall be raked out while setting and pointed on completion. The Contractor shall prepare selection of samples with supporting information, including the same of the supplier and quarry, for the approval of the Engineer. Stop log grooves shall b e provided for the outlet structures as shown on the Drawings. The faces of the grooves shall be protected with stainless steel inserts, AISI 304 or equal. 7. Valves and Sluice Gates The valves, sluice gates and the respective accessories for the sewerage network shall be as specified in the TS for Mechanical & Electrical Works. 8. Excavation, backfilling and reinstatement 8.1 Excavation Trenches for underground pipework, manholes and chambers shall be excavated to the lines and grades or elevations shown on the Drawings or as required in the Earthworks Specification. The Contractor shall avoid unnecessary opening of the pipe excavation before installing the pipes. 8.1.1 Backfilling Backfilling shall be carried out in layers as defined in such a way that it does not disturb alignments, grades, or stability o f pipes. Backfilling shall only be carried out with approved materials. The Contractor shall maintain the backfill at the specified levels and ensure that the surfaces after backfilling are kept in satisfactory condition during the performance of the Contract. Any settlement after backfilling shall be topped with the same class of material and kept to the required level. Where such settlement shall constitute a hazard to life, property, 01. traffic, the work shall be carried out the same day that the settlement is noticed by or reported to the Contractor. If such settlements are substantial and indicate poor backfilling, the Contractor shall re-excavate to the required depth and backfill the excavation of trench again to the required standards. Lf the Engineer considers that the Contractor is not complying with any one of the foregoing requirements, he may prohibit further trench excavation until he is satisfied with the progress of laying and testing of pipes and refilling oftrench excavation.
8.1.2 Surface Reinstatement Surface reinstatement shall be carried out to the standard that existed before the excavation and in the event of settlement after reinstatement, the reinstated road formation shall be removed and remade to the standard previously existing.
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In the event a relevant local authority carries out the reinstatement, the Contractor shall pay that authority for the work. 9. Installation
9.1 General All precautions shall be taken to protect the pipes or box culverts and prior to installation all pipes shall be checked for soundness and cleanliness. Any material found to be defective shall be marked and removed from the Site. Pipes, fittings and other accessories shall be stored as recommended by the manufacturer. Proper and suitable tools and appliances for the safe and convenient handling and laying of pipes or box culverts shall be used and those shall comply with manufacturer's recommendations. Should any pipe or box culvert be discovered to be defective after being laid, it shall be removed and replaced with a sound pipe by the Contractor at his expense. Pipe or box culvert section shall be lowered into the trench in such a manner that neither the pipe nor the trench will be damaged or disturbed and so as to prevent earth or debris from falling into the previously prepared pipe bed or gaining entrance to the pipe. Under no circumstances shall pipe materials be dropped or dumped into the trench. Special attention must be paid to avoid any damage of corrosion protection during the installation. Pipes, fittings and other accessories shall be laid to conform with the lines and grades shown on the Drawings. Invert levels to be set to a tolerance of plus or minus five (* 5) millimetres. Socket and spigot pipes shall be laid with the socket ends facing the direction of laying. The socket directions shown on the Drawings are indicative only and shall be adjusted according to this principle. After each pipe is installed the interior of the pipes shall be cleaned of all dirt and superfluous materials. Where cleaning after laying is difficult because of small pipe size, a suitable swab or drag shall be kept and pulled forward past each joint immediately after the jointing has been completed. Trenches shall be kept dry and pipes shall not be laid when the condition of the trench is unsuitable. Under no circumstances shall water be allowed to run through the pipes during construction. Whenever pipe laying is stopped the open ends of pipe and fittings shall be securely and satisfactorily closed with caps so that no water, earth or other substance will enter the pipe or fittings. The pipe shall be secured and protected to prevent displacement of the pipe by any movement of the backfilling. In case water or any foreign material enters the pipe or the pipe is displaced from its position, the Contractor shall clean the pipe and reinstall it at its correct position at his own expense. Free distance between the top of one pipe andlor service and the underside of another pipe or service shall not be less than 100 mm.
9.2 Concrete Pipes Piping shall be installed to the required lines and grades. All offsets or fittings required to accomplish this must be furnished. All dimensioned pipes and fittings shall be installed before fitting make-up pieces, and the hole shall be jointed so that no stress or strain is created in the lines and associated equipment due to forcing parts into position. Changes in direction shall be made using manholes. Temporary bracing and supports shall be provided to adequately support the pipe during installation and care shall be taken in placing of piping to prevent damage to the pipe or pipe coating or adjacent structures or equipment. All supports and blocking shall be in place before temporary supports and bracings are removed. Pipes laid in trenches shall be adequately and securely clamped or otherwise held o r fixed to an adequate number of supports to prevent movement of pipes during pipe test and
- when the pipes are in service. --
Where pipes are laid in the ground the pipe shall be bedded as shown on the Drawings. The bedding shall plovide a continuous even bea~ing for the entire length of the pipe. At joints, the bedding shall be placed after the joint has been made up as specified herein. Bedding and backfilling shall comply with the applicable requirements of section 5.1 3 or otherwise instructed by the Engineer. Pipe joints shall be left exposed until the pipeline has been successfully leakage tested. The Engineer may waive this requirement if in his opinion conditions warrant h ~ l n to do so. The Contractor shall be responsible for the protection of the joints.
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At all times when pipe laying is not in progress, or the trench is unattended, the open ends of pipe shall be closed by watertight plugs or other approved means. Table 5.5 Permksible burying depth of concrete pipe 1 Pipe class I Permissible pipe cover (m)
9.3 Rein forced Concrete Box Sewer - - -- -
The Contractor shall make arrangements to transport and offload box sewer sections at site. The lifting methods such as providing eye bolts, threaded lifting sections or protecting loops may be applied but the Contractor may adopt any other method suitable without causing any damage to box sewer particularly jointing surfaces from damage while lifting. Handing of box sewer shall be by lifting and never by dragging. The box sewer laying is usually commenced from the downstream end with socket facing upstream to receive the box sewer section to be laid. The box sewer section shall be carefully lowered on the prepared base alignment the spigot with the socket of the unit already laid. If any adjustment to the level is necessary, the box sewer shall be removed and the binding layer adjusted, no local backing shall be used to adjust the level. Prior to the commencement of construction the Contractor shall submit his proposal for the type of joints, he proposes to use for the box sewer sections and also the method of connecting box sewer. Access shafts/manholes with drawings and relevant specifications shall be submitted for approval of the Engineer. No separate payment shall be made for the joint and shall be included in the unit price for box sewer sections. The benching inside the sewer shall be constructed with grade C25 concrete to the dimensions shown on the Drawings. No separate payment shall be made for this benching and shall be included in the unit price for box sewer sections.
9.4 Connecting to Existing Sewers
L M H
Where shown on the Drawings, the existing sewers and house connections shall be extended, connected and jointed to new sewers. The connections of the existing pipes and open channels to the new sewers shall in general be carried out at the manholes as shown on the Drawings. Before entering or breaking into an existing sewer, the Contractor shall give notice of his intention to do so to the owner of the existing sewer to which the connection is to be made. Existing sewer no longer required shall, at the direction of the Engineer, be sealed with concrete or removed and replaced with general backfill material.
9.5 Concrete Protection Slabs A cast insitu reinforced concrete slab shall be provided when minimum cover over a pipeline cannot be achieved in heavy or light traffic areas (major and local streets). The distance between the top of pipeline and lower part of the slab shall not be less than 100 mm.
Unreinforced concrete pipe
9.6 Cutting of Pipes
Reinforced concrete 7ipe I Min 0.70 0.50
, 0.30
Pipe shall be cut to provide a clean square profile without splitting or fracturing the pipe wall and with minimal damage to any protective coating and lining. Where necessary, the cut ends of pipes shall be formed suitable for the type ofjoint to be used and protective coatings and linings shall be made good and the ends of the cut sealed. 10. Testing of pipelines 10.1 General The pipelines shall be tested in lengths determined by the course of construction, in accordance with a programme approved by the Engineer The Contractor shall furnish all necessary labour, materials including water, and equipment necessary for carrying out the tests.
Min 0.50 0.40 0.30
Max 3 .OO 5.00 7.00
Thang 1,ong Infrastructure Duvelopmcnt Joint Stock C ~ ~ n p a n ) (Infm-'l'hanglong) 198
Max 5.00 8.00 10.0
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VIETNAM URBAN UPGRADING PRO.IECT - NAM DlNH I!RBAN IJPGRADING SUB-PROJECT Phase I1 Enironmental Impact Assessment (E1.4) April 2009
The Contractor shall provide all means and apparatus necessary for introducing the water into the pipelines for flushing and testing including all pumps, gauges, meters, plugs, caps, blow off piping, etc. as well as necessary strutting, thrust blocks etc. to prevent pipe movement during the flushing and testing. All pressure pipelines shall be flushed and tested in lengths not exceeding 500 m. All non- pressure pipelines shall be flushed and tested from manhole to manhole not exceeding 100 m. The Contractor shall give one-week notice of the time when he intends to test any pipelines. The Contractor shall be responsible for ensuring the testing has no adverse affect on the design concrete strength of the thrust blocks. 10.2 Testing o f Non-Pressure Pipelines 10.2.1 General Non-pressure pipelines laid in open trench shall be tested after they are jointed, and before final backfilling is commenced, other than such as may be necessary for structural stability whilst under test. The pipelines shall be tested by means of an air or water test or by visual inspection or closed circuit television (CCTV) examination, in lengths determined by the course of construction, in accordance with a programme approved by the Engineer. A further test shall be carried out after the final backfilling is complete. 10.2.2 Water Test for Non-Pressure Pipelines The test pressure for non-pressure pipelines up to and including DN 800 pipes and 800 x 800 box culverts shall be not less than 1.2 m head of water above the pipe soffit or ground water level, which ever is the higher at the highest point, and not greater than 6 m head at the lowest point of section. Steeply graded pipelines shall be tested in stages in cases where the maximum head, as stated above, would be exceeded if the whole section were tested in one length. The pipeline shall be filled with water and a minimum period of two hours shall be allowed for absorption, after which water shall be added from a measuring vessel at intervals of 5 minutes and the quantity required too maintain the original water level noted. Unless otherwise specified, the length of pipeline shall be accepted if the quantity of water added over a 30 minute period is less than 0.5 litre/lineal metre/metre of nominal size. 10.2.3 Air Test for Non-Pressure Pipelines Non-pressure pipelines to be air tested shall have air pumped in by suitable means until a pressure of 100 mm head of water is indicated in a U-tube connected to the system. The pipeline shall be accepted if the air pressure remains above 75 mm head of water after a period of 5 minutes without further pumping, following a period of stabilisation. Failure to pass the air test shall not preclude acceptance of the pipeline if a successful water test, ordered by the Engineer, can be subsequently carried out in accordance with the relevant clause of these Technical Specifications. 10.2.4 CCTV Inspection o f Pipelines The pipelines and box culverts not required to be tested by water test shall be internally inspected by colour CCTV. The Contractor shall provide all necessary equipment, including suitable covered accommodation for viewing the monitor screen, together with personnel experienced in the operation of the equipment and interpretation of results. The intensity of illumination within the pipe or box culvert and the draw ofthe camera shall be such as to allow a proper examination of the inside of the pipe or box culvert. Provision shall be made for the movement of the camera to be stopped and its position recorded and for permanent photographs to be taken at any point required by the Engineer or the Engineer's representative. 10.2.5 Infiltration Non-pressure pipelines, box culverts and manholes shall be tested for infiltration after backfilling. All inlets to the system shall be effectively closed and any residual flow shall be deemed to be infiltration. The pipeline including manholes shall be accepted as satisfactory if the infiltration, including the infiltration into manholes, in 30 minutes does not exceed 0.5 litreilineal rnetreimetre of nominal size. Notwithstanding the satisfactory completion of the above test, if there is any discernible flow of water entering the pipeline at a point which can be located either by visual or CCTV inspection, the Contractor shall take such measures as are necessary to stop such infiltration.
10.3 Testing of Pressrrre Pipeliiirs 10.3.1 Gcncral
Thang Long InPrastructurc Dcvelopmcn~ .loin1 StocL Company (111fr;l-1'h:lngLong) 199
Pipelines shall be tested after the completion of the pipeline with the exception of any backfilling not necessary for the stability and safety of the work and shall be tested before backfilling over joints and fittings. The section of pipe to be tested shall be slowly filled with water and air expelled completely from the pipe and all pipeline fittings. The specified test pressure, based on the elevation of the lowest point of the section under test, shall be applied by pumping. The Contractor shall arrange for the pressure gauges to be used in the test to be independently checked and a dated certificate of its accuracy shall be provided to the Engineer. The volume of water that must be added is converted into litres/metre/hour and shall not exceed the quantity which is obtained by the formula:
I Q = ( L * D * ~ P ) / ~ 1.526 where: Q= allowable leakage in litreslhour L= length of pipe tested in metres D= inside diameter of the pipe, in millimetres P= average test pressure during the test, in bar As an example, the allowable leakage in litres per 100 m of pipeline at a test pressure of 8 bar is as set out in Table 3.8 below. - . . - - - . , - . . . . . .
If defects are found during the tests the Contractor shall immediately make the necessary repairs at his own expense. The Contractor shall then repeat the test until no defects are found and until the test is within the result limits stated above. Irrespective of test results, visual inspection of the pipeline shall be carried out with the Engineer during the test and any defects made good.
I uble J. / Example oj allowable iealtage
10.3.2 Thermoplastic Pipes The thermoplastic (uPVC and PE) pressure pipes including the rising mains of the waste water pumping stations shall be tested as follows: pipe section shall be subject to an internal pressure corresponding to the pressure class (PN) shown on the Drawings (normally 6 bar). This pressure shall be maintained for 2 hours by adding water as soon as the pressure has dropped 0.2 bar. After the initial 2 hour period the pressure is increased to 1.3 x nominal working pressure and maintained for a further 2 hours by adding water as soon as the pressure has dropped 0.2 bar. The pressure is reduced to the nominal working pressure and the test pump valve is closed. After a further I hour the quantity of the water is measured that is possibly needed to increase the pressure back up to the nominal working pressure.
DN (mm) Q (I/ 1 0 0 d h )
10.3.4 Flushing o f Pressure Pipelines After completing the testing the Contractor shall thoroughly clean all pressure pipelines by flushing with water or other means to remove all dirt, stones, pieces of wood etc., which may have entered the pipe. Pipelines shall be flushed preferably at a velocity of 0.8 rnetres/second for an appropriate duration.
Thang Long Infrastructure Development Joint Stock Company (Infra-ThangLong) 200
