GMS Kunming–Hai Phong Transport Corridor Noi Bai– Lao ...

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Environmental Monitoring Report

Quarterly Report April–June 2012

VIE: Greater Mekong Subregion Kunming–Hai

Phong Transport Corridor Noi Bai– Lao Cai Highway

Project

Prepared by Getinsa for the Vietnam Expressway Corporation, the Ministry of Transport, the

Government of Viet Nam, and the Asian Development Bank.

CURRENCY EQUIVALENTS (as of 1 July 2012)

Currency unit – dong (D)

D1.00 = $0.000047 $1.00 = D20,885

In this report, "$" refers to US dollars unless otherwise stated. This environmental monitoring report is a document of the borrower. The views expressed herein do not necessarily represent those of ADB's Board of Directors, Management, or staff, and may be preliminary in nature. In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgments as to the legal or other status of any territory or area.

Loan 2391/2392 – VIE: GMS Kunming – Hai Phong Transport Corridor Noi Bai – Lao Cai Highway Project

QUARTERLY ENVIRONMENTAL, HEALTH AND SAFETY MONITORING REPORT

APRIL - JUNE 2012

Hanoi office : 12th floor, Ocean Park Building, Dao Duy Anh Street, Dong Da District Vinh Phuc office: Huu Thu Hamlet, Kim Long Ward, Tam Duong Dist, Vinh Phuc Province Madrid Spain head office: C/ Ramón de Aguinaga No 8, 28028 Madrid, Spain/ Web Page: www.getinsa.com

1 INTRODUCTION. FRAMEWORK OF THIS REPORT .......................................................... 1

1.1 FRAMEWORK OF THE REPORT ................................................................................... 1

1.2 DESCRIPTION OF THE PROJECT. DIVISION IN PACKAGES ...................................... 1

2 CONSTRUCTION WORKS PROGRESS DURING THE PERIOD ........................................ 4

2.1 PACKAGE A1 .................................................................................................................. 4

2.2 PACKAGE A2 .................................................................................................................. 6

2.3 PACKAGE A3 .................................................................................................................. 7

2.4 PACKAGE A4 .................................................................................................................. 8

2.5 PACKAGE A5 .................................................................................................................. 9

2.6 PACKAGE A6 ................................................................................................................ 10

2.7 PACKAGE A7 ................................................................................................................ 12

2.8 PACKAGE A8 ................................................................................................................ 13

3 CARRIED OUT TASKS DURING THE PERIOD ................................................................. 15

4 ENVIRONMENTAL MONITORING RESULTS. COMPLEMENTARY MEASURES TO BE

APPLIED ........................................................................................................................... 17

4.1 IMPACT ON AIR QUALITY ............................................................................................ 17

4.2 IMPACT ON WATER RESOURCES .............................................................................. 39

4.3 IMPACT ON SOILS QUALITY ....................................................................................... 61

4.4 IMPACT ON NOISE AND VIBRATION LEVELS ............................................................ 73

4.5 STREAMS AND RIVERSIDES MAINTENANCE ............................................................ 91

4.6 EROSION RISKS AND STABILITY IN SLOPES .......................................................... 100

4.7 HAZARDOUS SUBSTANCES MANAGEMENT ........................................................... 109

4.8 UNSUITABLE MATERIAL DISPOSALS AND BORROW PITS .................................... 119

4.9 WASTE AND CLEANLINESS IN SITE ......................................................................... 127

4.10 BIODIVERSITY PRESERVATION ............................................................................... 137

4.11 WORKERS’ CAMPS CONDITIONS ............................................................................. 143

4.12 LABOUR SAFETY EQUIPMENT ................................................................................. 154

4.13 TRAFFIC CONDITIONS AND SIGNPOSTING IN ROADS .......................................... 169

4.14 SIGNPOSTING IN DANGEROUS SURFACES ........................................................... 180

4.15 ACCIDENTS DUE TO THE LACK OF SAFETY MEASURES. RESPONSIBLES ......... 188

5 REFERENCE DOCUMENTS RELATIVE TO ENVIRONMENT, HEALTH AND SAFETY

ISSUES ........................................................................................................................... 193

5.1 PACKAGE A1 .............................................................................................................. 193

5.2 PACKAGE A2 .............................................................................................................. 193

5.3 PACKAGE A3 .............................................................................................................. 194

5.4 PACKAGE A4 .............................................................................................................. 195

5.5 PACKAGE A5 .............................................................................................................. 195

5.6 PACKAGE A6 .............................................................................................................. 196

5.7 PACKAGE A7 .............................................................................................................. 198

5.8 PACKAGE A8 .............................................................................................................. 199

6 STATUS ON THE ECAP IMPLEMENTATION ................................................................... 200

6.1 CONTRACTORS’ ENVIRONMENTAL AND SAFETY MANAGERS MOBILIZATION ... 200

6.2 ENVIRONMENTAL CORRECTIVE ACTION PLAN (ECAP). UPDATE 30TH/06/2012 . 202

7 GRIEVANCE INTAKES. PUBLIC CONSULTATION.......................................................... 249

ANNEX 1: PHOTOGRAPHIC REPORT ................................................................................... 251

ANNEX 2: GRIEVANCE INTAKES. PUBLIC CONSULTATION ............................................... 253

ANNEX 3: ACCIDENT IN LO RIVER BRIDGE. INCIDENTS AND COMPLAINTS

INFORMATION SYSTEMS. SPECIFIC REPORT ............................................................ 255

ANNEX 4: ENVIRONMENTAL STATUS IN CONCRETE BATCHING PLANTS. SPECIFIC

REPORT .......................................................................................................................... 257

ABBREVIATIONS

ADB Asian Development Bank

EIA Environmental Impact Assessment

EMR Environmental Monitoring Report

EPMU Expressway Project Management Unit

ESQR Environmental and Safety Quarterly Report

EWIR Environmental Weekly Inspection Report

MONRE Ministry of Natural Resources and Environment

MOT Ministry of Transport

NB-LC Noi Bai - Lao Cai

NS National Specialist (environmental)

PPE Personal Protection Equipment

PSC Project Supervision Consultant

SMR Safety Monitoring Report

TOR Terms Of Reference

VEC Vietnam Expressway Corporation

KPH Not detect

1 INTRODUCTION. FRAMEWORK OF THIS REPORT

1.1 FRAMEWORK OF THE REPORT

Within the framework of the Environmental Control Plans proposed by the contractors and the

duties of the Consultant (PSC) in this matter contained in the Consulting Services Contract, the

environmental team of national specialists (NS) in charge of inspecting the environmental

conditions of the works for the new highway, have done weekly inspections along the sites

and surroundings of all the Packages which nowadays are all with construction activities,

checking the environmental measures applied by the constructors and detecting any impacts

that could be generated by the building works during the period of reference of this report, that

means, January, February and March 2012. The results were included in the environmental

weekly inspection reports (EWIR) and the monthly environmental reports for each package

(EMR).

As the environmental team, therefore under its responsibility, is also in charge of monitoring

the healthy and safety conditions in site, specialists in site offices also have made weekly

inspections in all packages. Their results have been being included in the corresponding

monthly safety reports (SMR). Therefore these issues are also included in this quarterly report.

So, this document is defined as Environmental and Safety Monitoring Quarterly Report

(hereinafter called ESQR). It will be submitted to the Client, Vietnam Expressway Corporation

(VEC), through the Expressway Project Management Unit (EPMU) and following the Terms of

Reference (ToR) of the Consultant’s Contract, also to Asian Development Bank (ADB).

1.2 DESCRIPTION OF THE PROJECT. DIVISION IN PACKAGES

Noi Bai - Lao Cai (NB-LC) Highway is a part of Kunming - Hai Phong Transport Corridor, which

has been studied with a total length of 865 km passing Yunnan province of China and Lao Cai,

Yen Bai, Phu Tho, Vinh Phuc, Ha Noi, Bac Ninh, Hai Duong, Quang Ninh and Hai Phong

provinces of Vietnam.

Vietnam Expressway Corporation, which is a state owner company, is the proposer of this

project. Its executing agency is the Ministry of Transport (MOT), and it’s being financed by

Asian Development Bank (ADB) and the Government of Vietnam.

According to original design, NB - LC Highway has a total length of about 262.4 km, passing

through 72 communes and 18 districts of provinces and cities as Ha Noi, Vinh Phuc, Phu Tho,

Yen Bai and Lao Cai.

The construction of project is divided into two phases, in which the first phase will construct

244 km with 4 lanes from Ha Noi to Yen Bai and 2 lanes from Yen Bai to Lao Cai. The second

phase will be the widen section of the former with 6 lanes from Ha Noi to Yen Bai and 4 lanes

from Yen Bai to Lao Cai (Chinese border, 262 km).

Construction of the whole project, first phase, is divided into 8 packages including A1, A2, A3,

A4, A5, A6, A7 and A8. All of them have already begun their construction activities. The length,

location and the status of works in each package at the end of the period are described in the

following paragraphs and tables.

- Package A1 is about 26.630 km of length with start point at station Km 0+070 and finishes at

station Km 26+700. Package A1 goes through the Soc Son district of Hanoi City and Vinh

Phuc province.

- Package A2 is about 22.120 km of length and goes through the Vinh Phuc province and a

little of Phu Tho province. Package A2 has start point at station Km 26+700 and finishes at

station Km 48+820. It must cross over Lo River, with a long bridge.

- Package A3 is about 32.240 km of length with start point at station Km48+360 and ending

point at station Km 80+00. Package A3 goes through the Phu Tho province. The most

significant structure is the bridge to cross over Red River.

- Package A4 has start point at Km 80+000 in Cam Khe district, Phu Tho province and ending

point at Km109+750 in Tran Yen district, Yen Bai province. Its total length is 29.750 km.

- Package A5 has start point at Km109+750 in Tran Yen district, Yen Bai province and

ending point at Km150+900 in Van Yen district, Yen Bai province. Its total length is 41.150 km.

- Package A6 lengthens from start point Km150+900 of Van Yen district, Yen Bai province to

Km190+420 in Van Ban district, Lao Cai province. Its total length is 39.520 km. Almost

alignment goes through high mountains in Yen Bai and Lao Cai province and crosses over

natural streams by 18 bridges. This section also includes 1 tunnel under range of mountain at

Km186+500.

- Package A7 lengthens from start point Km190+420 in Van Ban district to Km 218+040 in Bao

Thang district, Lao Cai province. Almost alignment also goes through high mountains and 18

bridges are needed. Its total length is 27,620 m. Khe Sang bridge with a length of 287m is the

biggest one.

- Package A8 begins at station Km 218+040 in Bao Thang district and finishes at Km 244+155

in Bao Thang district, Lao Cai province. Its total length is 26,115 m. Suoi Trat bridge with a

length of 374.8 m is the biggest one.

Table 1.1: Current Status of Works at the end of the quarter

A1 A2 A3 A4

Site clearing 92,08 56,03 55,17 81,32 Earthworks 77,92 51,67 46,71 25,97 Drainage 43,91 7,40 23,34 17,01 Structures 68,95 53,54 41,41 36,93 Overall progress 48,57 33,84 26,44 15,80

A5 A6 A7 A8 Site clearing 79,37 91,43 102,05 91,68 Earthworks 13,40 40,82 106,87 60,20 Drainage 3,29 46,04 67,85 54,02 Structures 7,54 31,77 46,58 46,97 Overall progress 5,92 24,23 51,80 32,24

Data expressed in percentage of the total planned in the project

The environmental monitoring program is carried out in compliance with regulations of Vietnam

Government and ADB safeguard policy in order to control environmental impacts and to

ensure that the environment in the surroundings of the project area is well preserved. The VEC

proponent should perform environmental protection measures stated in the EIA report as well

as requirements written in the approval decision made by MONRE. In accordance with article

23 of the Environmental Protection Law and article 15 of Decree 80/2006/ND-CP, MONRE will

organize, direct, and monitor the environmental protection measures performed by VEC as

stated in the EIA report approved.

At present, this environmental monitoring program is being undertaken by Environmental

specialists of Getinsa hired by Vietnam Expressway Corporation. EPMU, the Project Manager,

with the Consultant’s support, monitors the environmental protection measures applied by the

contractors during the development of their works, incompliance with the environmental control

and protection plans proposed by contractors and already approved by PSC. Consultant

reports to EPMU-VEC as the main involved authority in the project.

In addition to that, during the monitoring process, the environmental specialists and contractors

will try to find out and mitigate unanticipated environmental impacts arising from the project

construction process.

2 CONSTRUCTION WORKS PROGRESS DURING THE PERIOD

In this chapter, they are included all the works already done or in process during the period, in

each package and detailing the section where the works are developed.

2.1 PACKAGE A1

April Sec 1: Km 0+900 ~ Km 4+350 Embankment work Sec 2: Km 0+080 ~ Km 1+000 & Km 4+350 ~ Km 7+661 Embankment work

Sec 3: Km 7+661 ~ Km 10+771 Embankment work Sec 4: Km 10+771 ~ Km15+030 Embankment work Sec 5: Km 15+030 ~ Km 18+400 Embankment work Sec 6: Km 18+400 ~ Km 21+900 Embankment work Sec 7: Km 21+900 ~ Km 23+900 Embankment work Sec 8: Km 23+900 ~ Km 26+700 Embankment work Underpass NH2 Structure work Kim Anh bridge (Km 1+901.05) Structure work TL402 bridge (Km 3+053.55) Structure work and PC voided slab Trung Kien bridge (Km 4+491.00) Structure work Dai Duong bridge (Km 7+392.65) Structure work Xuan Phuong bridge (Km 7+660.05) Structure work NTT bridge (Km 7 + 854.7) No activity Tan Loi bridge (Km 10+695.00) Structure work Ba Thien bridge (Km 14+026.00) Structure work I.C 3 bridge (Km 14+590.00) Structure work Bon bridge (Km 15+107.00) Structure work TL302B bridge (Km 15+825.00) No activity TL-TK bridge (Km 19+120.05) Structure work Cam I bridge (Km 21+910.05) Structure work Cam II bridge (Km 21+910.05) Structure work TL302CII bridge (Km 22+480.05) No activity Army I bridge (Km 23+855.45) No activity NH2B bridge (Km 24+946.00) Abutment backfilling

May Sec 1: Km 0+900 ~ Km 4+350 Embankment work Sec 2: Km 0+080 ~ Km 1+000 & Km 4+350 ~ Km 7+661 Embankment work

Sec 3: Km 7+661 ~ Km 10+771 Embankment work Sec 4: Km 10+771 ~ Km15+030 Embankment work Sec 5: Km 15+030 ~ Km 18+400 Embankment work

Sec 6: Km 18+400 ~ Km 21+900 Embankment work Sec 7: Km 21+900 ~ Km 23+900 Embankment work Sec 8: Km 23+900 ~ Km 26+700 Embankment work Underpass NH2 Structure work Kim Anh bridge (Km 1+901.05) Structure work TL402 bridge (Km 3+053.55) Structure work and PC voided slab Trung Kien bridge (Km 4+491.00) Structure work Dai Duong bridge (Km 7+392.65) Structure work Xuan Phuong bridge (Km 7+660.05)

Structure work

NTT bridge (Km 7 + 854.7) No activity Tan Loi bridge (Km 10+695.00) Structure work Ba Thien bridge (Km 14+026.00) Structure work I.C 3 bridge (Km 14+590.00) Structure work Bon bridge (Km 15+107.00) Structure work TL302B bridge (Km 15+825.00) No activity TL-TK bridge (Km 19+120.05) Structure work Cam I bridge (Km 21+910.05) Structure work Cam II bridge (Km 21+910.05) Structure work TL302CII bridge (Km 22+480.05) No activity Army I bridge (Km 23+855.45) No activity NH2B bridge (Km 24+946.00) Abutment backfilling

June Sec 1: Km 0+900 ~ Km 4+350 Embankment work Sec 2: Km 0+080 ~ Km 1+000 & Km 4+350 ~ Km 7+661 Embankment work

Sec 3: Km 7+661 ~ Km 10+771 Embankment work Sec 4: Km 10+771 ~ Km15+030 Embankment work Sec 5: Km 15+030 ~ Km 18+400 Embankment work Sec 6: Km 18+400 ~ Km 21+900 Embankment work Sec 7: Km 21+900 ~ Km 23+900 Embankment work Sec 8: Km 23+900 ~ Km 26+700 Embankment work Underpass NH2 Structure work Kim Anh bridge (Km 1+901.05) Structure work TL402 bridge (Km 3+053.55) Structure work and PC voided slab Trung Kien bridge (Km 4+491.00) Structure work Dai Duong bridge (Km 7+392.65) Structure work Xuan Phuong bridge (Km 7+660.05) Structure work NTT bridge (Km 7 + 854.7) No activity Tan Loi bridge (Km 10+695.00) Structure work Ba Thien bridge (Km 14+026.00) Structure work I.C 3 bridge (Km 14+590.00) Structure work Bon bridge (Km 15+107.00) Structure work TL302B bridge (Km 15+825.00) No activity TL-TK bridge (Km 19+120.05) Structure work Cam I bridge (Km 21+910.05) Structure work Cam II bridge (Km 21+910.05) Structure work TL302CII bridge (Km 22+480.05) No activity Army I bridge (Km 23+855.45) No activity NH2B bridge (Km 24+946.00) Abutment backfilling

2.2 PACKAGE A2

April Sec 1: Km 26+700~Km 32+700 Embankment work Sec 2: Km 32+700~Km 35+300 No activity Sec 3: Km 35+300~Km36+910 No activity Sec 4: Km 36+910~Km 39+850 Embankment work Sec 5: Km 39+580~Km 40+690 Embankment work Sec 6: Km 40+690~Km 43+400 No activity Sec 7: Km 43+400~Km 45+300 No activity Sec 8: Km 45+300~Km 47+660 Embankment work Army II Bridge (Km 27+015.00) Structure work Army III Bridge (Km 28+010.00) Structure work TL310 Bridge (Km 29+201.00) Structure work Ben Tre Bridge (Km 31+068.00) Structure work Tan Dung Bridge (Km 31+245.05) Structure work Muong Noi Bridge (Km 31+504.50) Bored pile work TL306I Bridge (Km 33+181.55) No activity Muong Dao Bridge (Km 33+295.00) Structure work Ben Gao Bridge (Km 35+211.05) Structure work TL305 Bridge (Km 37+951.55) Structure work Song Dao Bridge (Km 38+450.05) Structure work Phung Nguyen Bridge (Km 39+188.00) No activity Xuan Quang Bridge (Km 41+480.00) No activity Lo river Bridge (Km 48+181.30) Structure work

May Sec 1: Km 26+700~Km 32+700 Embankment work Sec 2: Km 32+700~Km 35+300 No activity Sec 3: Km 35+300~Km36+910 No activity Sec 4: Km 36+910~Km 39+850 Embankment work Sec 5: Km 39+580~Km 40+690 Embankment work Sec 6: Km 40+690~Km 43+400 No activity Sec 7: Km 43+400~Km 45+300 No activity Sec 8: Km 45+300~Km 47+660 Embankment work Army II Bridge (Km 27+015.00) Structure work Army III Bridge (Km 28+010.00) Structure work TL310 Bridge (Km 29+201.00) Structure work Ben Tre Bridge (Km 31+068.00) Structure work Tan Dung Bridge (Km 31+245.05) Structure work Muong Noi Bridge (Km 31+504.50) Bored pile work TL306I Bridge (Km 33+181.55) No activity Muong Dao Bridge (Km 33+295.00) Structure work Ben Gao Bridge (Km 35+211.05) Structure work TL305 Bridge (Km 37+951.55) Structure work Song Dao Bridge (Km 38+450.05) Structure work Phung Nguyen Bridge (Km 39+188.00) No activity Xuan Quang Bridge (Km 41+480.00) No activity Lo river Bridge (Km 48+181.30) Structure work

June Sec 1: Km 26+700~Km 32+700 Embankment work Sec 2: Km 32+700~Km 35+300 No activity Sec 3: Km 35+300~Km36+910 No activity Sec 4: Km 36+910~Km 39+850 Embankment work Sec 5: Km 39+580~Km 40+690 Embankment work Sec 6: Km 40+690~Km 43+400 Embankment work

Sec 7: Km 43+400~Km 45+300 Embankment work Sec 8: Km 45+300~Km 47+660 Embankment work Army II Bridge (Km 27+015.00) Structure work Army III Bridge (Km 28+010.00) No activity TL310 Bridge (Km 29+201.00) Structure work Ben Tre Bridge (Km 31+068.00) Structure work Tan Dung Bridge (Km 31+245.05) Structure work Muong Noi Bridge (Km 31+504.50) Bored pile work TL306I Bridge (Km 33+181.55) Structure work Muong Dao Bridge (Km 33+295.00) Structure work Ben Gao Bridge (Km 35+211.05) Structure work TL305 Bridge (Km 37+951.55) Structure work Song Dao Bridge (Km 38+450.05) Structure work Phung Nguyen Bridge (Km 39+188.00) No activity Xuan Quang Bridge (Km 41+480.00) Void slad girder Lo river Bridge (Km 48+181.30) Structure work

2.3 PACKAGE A3

April TL323B Bridge – Km 51 Finish. BaiBang railway Flyover - Km60+967.05 Finish drilling bore piles. Execute sub-structure IC8 - Km54+640 Execute sub-structure (stop work)

Red river Bridge – km77+800 Drilling bored piles at P4 on Red river. Finish drilling bore piles. Execute sub-structure

National railway flyover – Km77+246 Finish drilling bore piles. Execute sub-structure Ho Chi Minh IC- Km65+540 Finish drilling bore piles. Execute sub-structure Phai Din bridge- Km70+236 Finish. TL320C bridge-Km72+580 Building Foundation platform of A2 abutment Cam Phu bridge Km61+583 Drilling bore pile Xuan Thanh bridge Km66+947 Drilling bore pile TL315B bridge Km67+662 Drilling bore pile Phong Chau bridge Km59+020 Finish drilling bore piles. Execute sub-structure Section 1: Km48+360-Km54+000 Excavation & filling work

Section 2: Km54+000-Km59+600 Earth work and Implement box culvert

Section 3: Km59+600-Km65+390 Embankment work and Implement box and pipe culvert Section 4: Km65+390-Km69+070 Excavation & filling work Section 5: Km69+070-Km73+070 Excavation & filling work

Section 6: Km73+070-Km77+620 Excavation & filling work and Implement pipe and box culvert

Section 7: Km77+620-Km80+000 Not yet active (Obstruction) May

TL323B Bridge – Km 51 Finish. BaiBang railway Flyover - Km60+967.05 Finish drilling bore piles. Execute sub-structure IC8 - Km54+640 Execute sub-structure (stop work)

National railway flyover – Km77+246 Finish drilling bore piles. Execute sub-structure Ho Chi Minh IC- Km65+540 Finish drilling bore piles. Execute sub-structure Phai Din bridge- Km70+236 Finish. TL320C bridge-Km72+580 Building Foundation platform of A2 abutment Cam Phu bridge Km61+583 Drilling bore pile Xuan Thanh bridge Km66+947 Drilling bore pile TL315B bridge Km67+662 Drilling bore pile Phong Chau bridge Km59+020 Finish drilling bore piles. Execute sub-structure

Section 1: Km48+360-Km54+000 Excavation & filling work Section 2: Km54+000-Km59+600 Earth work and Implement box culvert Section 3: Km59+600-Km65+390 Embankment work and Implement box and pipe culvert Section 4: Km65+390-Km69+070 Excavation & filling work Section 5: Km69+070-Km73+070 Excavation & filling work

Section 7: Km77+620-Km80+000 Not yet active (Obstruction) June

TL323B Bridge – Km 51 Finish. BaiBang railway Flyover - Km60+967.05 Finish drilling bore piles. Execute sub-structure IC8 - Km54+640 Execute sub-structure (stop work)

National railway flyover – Km77+246 Finish drilling bore piles. Execute sub-structure Ho Chi Minh IC- Km65+540 Finish drilling bore piles. Execute sub-structure Phai Din bridge- Km70+236 Finish. TL320C bridge-Km72+580 Building Foundation platform of A2 abutment Cam Phu bridge Km61+583 Drilling bore pile Xuan Thanh bridge Km66+947 Drilling bore pile TL315B bridge Km67+662 Drilling bore pile Phong Chau bridge Km59+020 Finish drilling bore piles. Execute sub-structure Section 1: Km48+360-Km54+000 Excavation & filling work Section 2: Km54+000-Km59+600 Earth work and Implement box culvert Section 3: Km59+600-Km65+390 Embankment work and Implement box and pipe culvert Section 4: Km65+390-Km69+070 Excavation & filling work Section 5: Km69+070-Km73+070 Excavation & filling work

Section 7: Km77+620-Km80+000 Not yet active (Obstruction)

2.4 PACKAGE A4

April Ngoi Lao bridge - Km97+100 Drilling bore pile QL32C bypass bridge - Km107+533 Drilling bore pile Ngoi Van bridge - Km108+960 Drilling bore pile Dam Nang bridge –Km108+287 Drilling bore pile TL321C bridge – Km84+400 Drilling bore pile Ngoi Gianh bridge – Km88+760 Drilling bore pile Section 1: Km80+000-Km85+000 Earth work Section 2: Km85+000-Km89+600 Site clearing and Earth work Section 3: Km89+600-Km96+200 Earth work and top soil remove Section 4: Km96+200-Km100+000 Embankment and filling work Section 5: Km100+000-Km105+000 Embankment and filling work Section 6: Km105+000-Km109+750 Embankment and filling work

May Ngoi Lao bridge - Km97+100 Drilling bore pile QL32C bypass bridge - Km107+533 Drilling bore pile Ngoi Van bridge - Km108+960 Drilling bore pile Dam Nang bridge –Km108+287 Drilling bore pile TL321C bridge – Km84+400 Drilling bore pile Ngoi Gianh bridge – Km88+760 Drilling bore pile

Section 1: Km80+000-Km85+000 Earth work Section 2: Km85+000-Km89+600 Site clearing and Earth work Section 3: Km89+600-Km96+200 Earth work and top soil remove Section 4: Km96+200-Km100+000 Embankment and filling work Section 5: Km100+000-Km105+000 Embankment and filling work Section 6: Km105+000-Km109+750 Embankment and filling work

June Ngoi Lao bridge - Km97+100 Drilling bore pile QL32C bypass bridge - Km107+533 Drilling bore pile Ngoi Van bridge - Km108+960 Drilling bore pile Dam Nang bridge –Km108+287 Drilling bore pile TL321C bridge – Km84+400 Drilling bore pile Ngoi Gianh bridge – Km88+760 Drilling bore pile Section 1: Km80+000-Km85+000 Earth work Section 2: Km85+000-Km89+600 Site clearing and Earth work Section 3: Km89+600-Km96+200 Earth work and top soil remove Section 4: Km96+200-Km100+000 Embankment and filling work Section 5: Km100+000-Km105+000 Embankment and filling work Section 6: Km105+000-Km109+750 Embankment and filling work

2.5 PACKAGE A5

April Van Phu bridge – Km114+100.05 Building Foundation platform Hop Minh My bridge – Km118+920.05 No activity Ngoi Lau bridge – Km120+615.85 Building Foundation platform QL 37 bridge – Km121+433.05 Building Foundation platform Ngoi Gua bridge – Km128+665.46 Excavation & filling works Ngoi Rao bridge – Km130+916.30 Excavation & filling works Ngoi Thu bridge – Km136+108.35 No activity Ngoi Thap bridge – Km138+447.15 Excavation & filling works Ngoi Vien bridge – Km140+788.50 Building Foundation platform Xuan Thu bridge – Km141+483.55 No activity Ngoi Thia bridge – Km145+434.05 Building Foundation platform and Excavation & filling works Ngoi Buc bridge – Km 150+704.65 No activity Section 1: Km109+750 - Km115+800 Excavation & filling work Section 2: Km115+800 - Km120+000 Excavation & filling work Section 3: Km120+000 - Km125+000 Excavation & filling work Section 4: Km125+000 - Km130+000 Site clearing and excavation & filling work Section 5: Km130+000 - Km136+400 Site clearing and excavation & filling work Section 6: Km136+400 - Km142+000 Excavation & filling work Section 7: Km142+000 - Km148+000 Site clearing and excavation & filling work Section 8: Km148+000 - Km150+900 Site clearing and excavation & filling work

May Van Phu bridge – Km114+100.05 Building Foundation platform Hop Minh My bridge – Km118+920.05 No activity Ngoi Lau bridge – Km120+615.85 Building Foundation platform QL 37 bridge – Km121+433.05 Building Foundation platform Ngoi Gua bridge – Km128+665.46 Excavation & filling works Ngoi Rao bridge – Km130+916.30 Excavation & filling works Ngoi Thu bridge – Km136+108.35 No activity Ngoi Thap bridge – Km138+447.15 No activity Ngoi Vien bridge – Km140+788.50 Building Foundation platform Xuan Thu bridge – Km141+483.55 No activity Ngoi Thia bridge – Km145+434.05 Building Foundation platform and Excavation & filling works Ngoi Buc bridge – Km 150+704.65 No activity

Section 1: Km109+750 - Km115+800 Excavation & filling work Section 2: Km115+800 - Km120+000 Excavation & filling work Section 3: Km120+000 - Km125+000 Excavation & filling work Section 4: Km125+000 - Km130+000 Site clearing and excavation & filling work Section 5: Km130+000 - Km136+400 Site clearing and excavation & filling work Section 6: Km136+400 - Km142+000 Excavation & filling work Section 7: Km142+000 - Km148+000 Site clearing and excavation & filling work Section 8: Km148+000 - Km150+900 Site clearing and excavation & filling work

June Van Phu bridge – Km114+100.05 Structure work Hop Minh My bridge – Km118+920.05 No activity Ngoi Lau bridge – Km120+615.85 Structure work QL 37 bridge – Km121+433.05 Structure work Ngoi Gua bridge – Km128+665.46 Structure work Ngoi Rao bridge – Km130+916.30 Structure work Ngoi Thu bridge – Km136+108.35 No activity Ngoi Thap bridge – Km138+447.15 No activity Ngoi Vien bridge – Km140+788.50 Structure work Xuan Thu bridge – Km141+483.55 No activity Ngoi Thia bridge – Km145+434.05 No activity Ngoi Buc bridge – Km 150+704.65 No activity Section 1: Km109+750 - Km115+800 Excavation & filling work Section 2: Km115+800 - Km120+000 Excavation & filling work Section 3: Km120+000 - Km125+000 Excavation & filling work Section 4: Km125+000 - Km130+000 Site clearing and excavation & filling work Section 5: Km130+000 - Km136+400 Site clearing and excavation & filling work Section 6: Km136+400 - Km142+000 Excavation & filling work Section 7: Km142+000 - Km148+000 Excavation & filling work Section 8: Km148+000 - Km150+900 Site clearing and excavation & filling work

2.6 PACKAGE A6

April Khe Chuong bridge – Km153+355.05 Building Foundation platform Ngoi That bridge – Km155+971.55 Building Foundation platform Ngoi Rom bridge- Km157+517.05 No activity Ngoi Cong bridge – Km159+207.85 No activity Ngoi Giam I bridge – Km162+896.35 Building Foundation platform Ngoi Giam II bridge – Km163+126.00 Building Foundation platform Ngoi Hut bridge – Km165+110.50 Building Foundation platform Ngoi Chac bridge – Km169+412.00 Excavation & filling works Ngoi Pha bridge – Km170+312.50 No activity Suoi Quan bridge – Km173+434.00 No activity Ngoi Nhuoc bridge – Km176+661.85 Building Foundation platform Lang Nhay bridge – Km182+164.00 Building Foundation platform Lang Lau bridge – Km184+057.95 Building Foundation platform Ngoi Don bridge – Km185+077.75 Building Foundation platform and Excavation & filling works Dai Viet bridge – Km186+902.05 Building Foundation platform Van Xuan bridge – Km187+141.55 No activity Suoi Nau bridge – Km188+766.00 No activity Lang Nheo flyover – Km173+929 No activity Section 1: Km150+900 - Km156+000 Excavation & filling work Section 2: Km156+000 - Km162+000 Site clearing and excavation & filling work Section 3: Km162+000 - Km165+000 Excavation & filling work Section 4: Km165+000 - Km168+000 Site clearing and excavation & filling work Section 5: Km168+000 - Km172+000 Excavation & filling work

Section 6: Km172+000 - Km176+713 Excavation & filling work Section 7: Km176+713 - Km182+214 Excavation & filling work Section 8: Km182+214 - Km186+200 Site clearing and excavation & filling work Section 9: Km186+730 - Km190+420 Site clearing and excavation & filling work Tunnel (Km 186+200 – Km 186+730) 2 Tunnel Portals are being constructed by the Contractor.

May Khe Chuong bridge – Km153+355.05 Building Foundation platform Ngoi That bridge – Km155+971.55 Building Foundation platform Ngoi Rom bridge- Km157+517.05 No activity Ngoi Cong bridge – Km159+207.85 No activity Ngoi Giam I bridge – Km162+896.35 Building Foundation platform Ngoi Giam II bridge – Km163+126.00 Building Foundation platform Ngoi Hut bridge – Km165+110.50 Building Foundation platform Ngoi Chac bridge – Km169+412.00 Excavation & filling works Ngoi Pha bridge – Km170+312.50 No activity Suoi Quan bridge – Km173+434.00 No activity Ngoi Nhuoc bridge – Km176+661.85 Building Foundation platform Lang Nhay bridge – Km182+164.00 Building Foundation platform Lang Lau bridge – Km184+057.95 Building Foundation platform Ngoi Don bridge – Km185+077.75 Building Foundation platform and Excavation & filling works Dai Viet bridge – Km186+902.05 Building Foundation platform Van Xuan bridge – Km187+141.55 No activity Suoi Nau bridge – Km188+766.00 No activity Lang Nheo flyover – Km173+929 No activity Section 1: Km150+900 - Km156+000 Excavation & filling work Section 2: Km156+000 - Km162+000 Site clearing and excavation & filling work Section 3: Km162+000 - Km165+000 Excavation & filling work Section 4: Km165+000 - Km168+000 Site clearing and excavation & filling work Section 5: Km168+000 - Km172+000 Excavation & filling work Section 6: Km172+000 - Km176+713 Excavation & filling work Section 7: Km176+713 - Km182+214 Excavation & filling work Section 8: Km182+214 - Km186+200 Site clearing and excavation & filling work Section 9: Km186+730 - Km190+420 Site clearing and excavation & filling work Tunnel (Km 186+200 – Km 186+730) 2 Tunnel Portals are being constructed by the Contractor.

June Khe Chuong bridge – Km153+355.05 Structure work Ngoi That bridge – Km155+971.55 Structure work Ngoi Rom bridge- Km157+517.05 No activity Ngoi Cong bridge – Km159+207.85 Structure work Ngoi Giam I bridge – Km162+896.35 Structure work Ngoi Giam II bridge – Km163+126.00 Structure work Ngoi Hut bridge – Km165+110.50 Structure work Ngoi Chac bridge – Km169+412.00 Structure work Ngoi Pha bridge – Km170+312.50 No activity Suoi Quan bridge – Km173+434.00 No activity Ngoi Nhuoc bridge – Km176+661.85 Structure work Lang Nhay bridge – Km182+164.00 Structure work Lang Lau bridge – Km184+057.95 Structure work Ngoi Don bridge – Km185+077.75 Structure work Dai Viet bridge – Km186+902.05 Structure work Van Xuan bridge – Km187+141.55 No activity Suoi Nau bridge – Km188+766.00 No activity Lang Nheo flyover – Km173+929 No activity Section 1: Km150+900 - Km156+000 Excavation & filling work Section 2: Km156+000 - Km162+000 Excavation & filling work Section 3: Km162+000 - Km165+000 Excavation & filling work Section 4: Km165+000 - Km168+000 Excavation & filling work Section 5: Km168+000 - Km172+000 Excavation & filling work Section 6: Km172+000 - Km176+713 Excavation & filling work

Section 7: Km176+713 - Km182+214 Excavation & filling work Section 8: Km182+214 - Km186+200 Excavation & filling work Section 9: Km186+730 - Km190+420 Excavation & filling work Tunnel (Km 186+200 – Km 186+730) 2 Tunnel Portals are being constructed by the Contractor.

2.7 PACKAGE A7

April Khe Sang Brdge Structure concrete class C2: 100.0 m3; PC- I Girder, length

24m, height 1.45m: 2 each; P3, P7: Structure concrete class C2: 15m3, 6.6m3; PC- I Girder, length 24m, height 1.45m: 1 each

Khe Can Bridge PC- I Girder, length 24m, height 1.45m: 1 each Khe Dai bridge PC- I Girder, length 33m, height 1.65m: 1 each; Structure

concrete class C2: 50m3; PC- I Girder, length 33m, height 1.65m: 2 each

Thin Thung II Bridge P1: Structure concrete class C2: 180m3 Tan An Bridge A2, Structure concrete class C2: 17.5m3 Xom Danh Bridge Left: Structure concrete class C2: 29.4 m3; Right: Structure

concrete class C2: 21.6 m3; Ram AII: Structure concrete class C2: 30m3; Ram B: Structure concrete class C2: 23.2 m3

Ram AII Bridge Structure concrete class C2: 387.5 m3 Xom Cam Bridge Structure concrete class C2: 24m3 Ngoi Bong Bridge PC- I Girder, length 33m, height 1.65m: 1 each Section1: Km190+420-Km201+000 Unsuitable material, Rock excavation to fill and Common

excavation Section2: Km201+000-Km207+000 Common excavation and Rock excavation to fill Section3: Km207+000-Km218+040 Common excavation and Unsuitable material

May Khe Sang Brdge P3, P8: Structure concrete class C2: 88.7m3, 29.3m3; PC- I

Girder, length 24m, height 1.45m: 1 each Khe Can Bridge PC- I Girder, length 24m, height 1.45m: 1 each Tan Tien Bridge P2, P3: Structure concrete class C2: 18m3, 24m3 Thin Thung II Bridge P1: Structure concrete class C2: 156m3 Tan An Bridge P4: Structure concrete class C2: 15.8m3 Xom Danh Bridge Structure concrete class C2: 500m3; PC- I Girder, length 33m,

height 1.65m: 1 each Ram AII Bridge No activity Xom Cam Bridge Cast-in-place concrete pile (A1, A2 hole): 14m; P1: Structure

concrete class C2: 27m3 Ngoi Bong Bridge PC- I Girder, length 33m, height 1.65m: 1 each Tan Thuong Bridge A1: Structure concrete class C2: 50m3 Khe Hong Bridge P3: Structure concrete class C2: 20m3 Cam Con Bridge P2: Structure concrete class C2: 100m3 Section1: Km190+420-Km201+000 Unsuitable material and Rock excavation to fill Section2: Km201+000-Km207+000 Common excavation and Rock excavation to fill Section3: Km207+000-Km218+040 Common excavation and Unsuitable material

June Khe Sang Brdge No activate Khe Can Bridge No activate Tan Tien Bridge PC- I Girder, length 24m, height 1.45m: 1 each; A2 Structure

concrete class C2: 76m3 Thin Thung II Bridge P1 (right); P1 (left): Structure concrete class C2: 200m3,

31.9m3 Tan An Bridge No activate Xom Danh Bridge Structure concrete class C2: 500m3; PC- I Girder, length

33m, height 1.65m: 1 each

Ram AII Bridge No activate Xom Cam Bridge Cast-in-place concrete pile (A1, A2 hole): 14m Ngoi Bong Bridge No activate Tan Thuong Bridge No activate Khe Hong Bridge No activate Cam Con Bridge Structure excavation without cofferdam: 200m3 Chau Que Rhuong Bridge A1, A2, P1, P2: Structure concrete class C2: 50m3, 30m3,

30m3, 30m3; A2, P1: Structure concrete class C2: 56.9m3; 24m3

Ram B Bridge PC-I girder long: 24m, height 1.45m: 1 each Section1: Km190+420-Km201+000 Unsuitable material Section2: Km201+000-Km207+000 Common excavation and Rock excavation to fill Section3: Km207+000-Km218+040 Common excavation and Unsuitable material

2.8 PACKAGE A8

April IC18 Bridge No activity

Suoi Trat Bridge

cast-in-place concrete pile D=1000mm: 32m; PC-I girder, length 33m, height 1.65m: 1each; Structure; cast-in-place concrete pile D=1000mm: 12m; PC-I girder, length 33m, height 1.65m: 1each

Ngoi Bo Bridge Structural concrete G: 3.79m3; PC-I girder, length 33m, height 1.65m: 1each; cast-in-place concrete pile D=1000mm: 143m; Structural concrete C2: 71.29m3;

Suoi Nhu Bridge Structural concrete: 176.00m3; PC-I girder, length 25m, height 1.65m: 1each

Lang Tra Bridge Structure concrete lass G: 21.82m3; cast-in-place concrete pile D=1000mm: 92m.

IC17 Bridge cast-in-place concrete pile D=1000mm: 60m; PC-I girder, length 24m, height 1.45m: 1each; Structural concrete C2: 15.00m3; cast-in-place concrete pile D=1000mm: 44m.

Son Ha Bridge cast-in-place concrete pile D=1000mm: 184m Section1: Km218+080-Km223+000 Back to fill, Unsuitable material and common excavation Section2: Km223+000-Km225+000 Back to fill and common excavation Section3: Km225+000-Km229+000 No activity Section4: Km229+000-Km232+000 Back to fill and Unsuitable material Section5: Km232+000-Km235+000 Unsuitable material and common excavation Section6: Km235+000-Km238+000 No activity Section7: Km238+000-Km241+000 Back to fill, Unsuitable material and common excavation Section8: Km241+000-Km243+000 Unsuitable material and common excavation Section9: Km243+000-Km244+000 Unsuitable material and common excavation RAM IC18: Km244+000-Km244+570 Unsuitable material and common excavation

May IC18 Bridge No activity Suoi Trat Bridge PC-I girder, length 33m, height 1.65m: 1each Ngoi Bo Bridge Structural concrete C2: 3.79m3

Suoi Nhu Bridge Structural concrete: 9.2m3; PC-I girder, length 25m, height 1.65m: 1each

Lang Tra Bridge No activity IC17 Bridge No activity Son Ha Bridge No activity Section1: Km218+080-Km223+000 Back to fill and Unsuitable material and common excavation Section2: Km223+000-Km225+000 Unsuitable material Section3: Km225+000-Km229+000 No activity Section4: Km229+000-Km232+000 Common excavation Section5: Km232+000-Km235+000 Unsuitable material and common excavation

Section6: Km235+000-Km238+000 No activity Section7: Km238+000-Km241+000 Back to fill and Unsuitable material and common excavation Section8: Km241+000-Km243+000 Unsuitable material and common excavation Section9: Km243+000-Km244+000 Unsuitable material and common excavation RAM IC18: Km244+000-Km244+570 No activity

June IC18 Bridge Cast-in-place concrete Pile D=1000mm: 15m

Suoi Trat Bridge Structural concrete C2: 203,23m3 Ngoi Bo Bridge Cast-in-place concrete Pile D=1000mm: 31m Suoi Nhu Bridge PC-I girder, length 33m, height 1.65m: 1each

Lang Tra Bridge Cast-in-place concrete Pile D=1000mm: 14m; PC-I girder length 33m, height 1.65m: 1 each

IC17 Bridge Cast-in-place concrete Pile D=1000mm: 14m Son Ha Bridge Cast-in-place concrete Pile D=1000mm: 14m Section1: Km218+080-Km223+000 Back to fill and Unsuitable material and common excavation Section2: Km223+000-Km225+000 Unsuitable material Section3: Km225+000-Km229+000 Back to fill and Unsuitable material Section4: Km229+000-Km232+000 Common excavation Section5: Km232+000-Km235+000 Unsuitable material and common excavation Section6: Km235+000-Km238+000 Common excavation Section7: Km238+000-Km241+000 Back to fill and Unsuitable material and common excavation Section8: Km241+000-Km243+000 Unsuitable material and common excavation Section9: Km243+000-Km244+000 Unsuitable material and common excavation RAM IC18: Km244+000-Km244+570 No activity

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In the site inspections, we still found that the dirt is being tracked onto public roads where the

construction sites intersect them. The Contractor also doesn’t clean these areas to keep them

in cleanliness and sanitary condition; this issue causes high spread of airborne dust in the hot

windy days.

At section Km 0+665 ~ Km 3+000, we also didn’t see the Contractor to spray water on surface

of embankment section in order to minimize the spread of dust in this area. The PSC had

many times warned the Contractor of this problem but till last site inspection on April 24 we still

didn’t perceive the Contractor to implement our requirement.

At section Km 19+650, the Contractor has already installed the fence of iron sheet surrounding

the construction area to minimize the spread of noise during carrying out construction activities

in this area.

We don’t find serious problems at other sections during the site inspections this month.

In the site inspection on May 03, we found that the Contractor still has not implemented

watering activity on surface of embankment sections such as sections Km 0+665 ~ Km 3+000,

Km 4+800 ~ Km 5+000 and at Interchange No. 3. The PSC has many times requested the

Contractor to wáter surface of embankment section to minize the spread of airborne dust

during hot windy day; however, the Contractor doesn’t implement our requirements. During the

remaining time of the month, it usually rained so there was almost no embankment work and

the dust was naturally minimized.

At Trung Kien Bridge and Dai Duong Bridge, during the site inspection on May 22, we found

that the workers had burned trash on sites. This activity is usually happened on sites despite

recommendation of the Engineer.

At other sections, we didn’t find serious problems during the site inspections this month.

In the site inspection on May 03, we found that the Contractor still has not implemented

watering activity on surface of embankment sections such as sections Km 0+665 ~ Km 3+000,

Km 4+800 ~ Km 5+000 and at Interchange No. 3. The PSC has many times requested the

Contractor to wáter surface of embankment section to minize the spread of airborne dust

during hot windy day; however, the Contractor doesn’t implement our requirements. During the

remaining time of the month, it usually rained so there was almost no embankment work and

the dust was naturally minimized.

At Trung Kien Bridge and Dai Duong Bridge, during the site inspection on May 22, we found

that the workers had burned trash on sites. This activity is usually happened on sites despite

recommendation of the Engineer.

At other sections, we didn’t find serious problems during the site inspections this month.

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By observations during this month we still perceived that the dirt is being tracked onto public

roads where the construction sites intersect them. The Contractor also doesn’t clean these

areas to keep them in cleanliness and sanitary condition; this issue causes high spread of

airborne dust in the hot windy days.

Along through way we also didn’t see the Contractor to carry out the watering activity on

surface of embankment sections to minimize the spread of dust during the hot windy day

despite many requirements of the Engineer. We issued the last warning to request the

Contractor to implement our requirements and if he still fails we will recommend the Employer

to deduct money.

At Batch Plant C, due to the Contractor still doesn’t comply with our requirements to install the

fence surrounding material stockpile area in order to limit the spread of airborne dust, therefore

the PSC has already deducted money.

At other section, there is no serious problem noted during the site inspections.

By observations during this month, we still perceived that the dirt is being tracked onto public

roads where the construction sites intersect them. The Contractor also does not clean these

Along through way we also did not see the Contractor to carry out the watering activity on

surface of embankment sections to minimize the spread of dust during the hot windy day

despite many requirements of the Engineer. We issued the last warning to request the

Contractor to implement our requirements and if he still fails we will recommend the Employer

to deduct money.

At Batch Plant C, due to the Contractor still doesn’t comply with our requirements to install the

fence surrounding material stockpile area in order to limit the spread of airborne dust, therefore

the PSC has already deducted money.

The status of tracking of dirt onto public road has not been mitigated. This matter caused

dirtiness and high spread of airborne dust, especially in hot windy days. At sections of

embankment, the Contractor also didn’t water the surface in dry days and this caused high

spread of dust, too. The PSC many times requested the Contractor to solve these problems

but up to now, there is no improvement recorded.

We didn’t see any improvement at Batch Plant C – Km 39+200, and in the site inspection on

May 21, together with expert of ADB, the Employer and the Contractor, we have taken public

consultation action in these areas and the local people disclosed that the level of dust is very

high during operation of this CBP. The PSC also stopped the work of this CBP until the

Contractor corrects the defect.

We also found that the trash was burned on site at Muong Dao Bridge. This activity is usually

happened on sites despite recommendation of the Engineer.

4.1.3 Package A3

The results of Air quality monitoring in April (table 4.3).

Table 4.3: Results of air quality in Package A3 in April, 2012.

Station Monitoring Items

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standard value

(mg/m3)

Km 48+500

CO 3,197 3,199 3,198 30 NOx 0,0164 0,0168 0,0166 0,2 TSP 0,181 0,183 0,182 0,30 SO2 0,072 0,070 0,071 0,35 PM10 0,148 0,150 0,149 0,15 Phenol KPH KPH KPH 0,01 Vibration 0,053 0,051 0,052 0,055

Km 55+500

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standard value

(mg/m3)

Km 67+700

Km 78+900

The analyzed results of the air environment show that: At the monitoring area, the other

analyzed results were within the allowed standard.

During April, when inspection in site we has found that all dump trucks were not covered. Soil

from trucks was fallen a lot on existing roads (Km51+100, Km62, Km67…). Therefore, dust

was distributed much in the air. The Consultant requested Contractor must collect all fallen soil

on existing roads, spread water regularly on both existing roads and access roads along

package A3 base on site minutes dated April 17th, 2012 at Km66+300 to Km66+300 and letter

ref. GET2-P0S-A3-1204 dated April 24th, 2012.

The result of Air quality monitoring in May as bellow:

Table 4.4: Results of air quality in Package A3 in May, 2012.

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standard value

(mg/m3)

Km 48+500

CO 3,245 3,247 3,246 30 NOx 0,0188 0,0186 0,0187 0,2 TSP 0,175 0,177 0,176 0,30 SO2 0,090 0,088 0,089 0,35 PM10 0,137 0,137 0,137 0,15 Phenol KPH KPH KPH 0,01 Độ rung 0,051 0,051 0,051 0,055

Km 55+500

CO 3,550 3,552 3,551 30 NOx 0,0481 0,0483 0,0482 0,2 TSP 0,210 0,212 0,211 0,30 SO2 0,047 0,049 0,048 0,35

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standard value

(mg/m3) PM10 0,133 0,135 0,134 0,15 Phenol KPH KPH KPH 0,01 Độ rung 0,053 0,053 0,053 0,055

Km 67+700

Km78+900

The analyzed results of the air environment show that: At the monitoring area, the other

In May, after warning letter of Consultant from April, Contractor spread water for some existing

roads (Km68, Km75+400…). But when inspection in site we have found that on existing roads

(Km51+100, Km62, Km78+900…) dust was distributed much in the air so local people was

complain much about this problem.

Special after inspection tour of ADB mission on May 21st, 2012, the ADB’s specialist

interviewed some local people who lives next to construction site (Km78+900). These people

said that they can’t sleep because noise, vibration from construction activities during 24

hours/day. Beside, dust was full in the air on sunny and dry days, Contractor did not spread

water appropriately to minimize dust. Hence, ADB mission and Consultant requested

Contractor must build fence around construction site where next to residential area and limit

working time at night to minimize noise, vibration and avoid disturb local people’s life. On dry

days, Contractor must spread water appropriately to avoid dust.

The Consultant’s warning letter was ref. GET2-POS-A3-1285 dated June 1st, 2012 “Require to

overcome Environmental and Safety problems in package A3.

roads where the construction sites intersect them. The Contractor also does not clean these

4.1.4 Package A4

The result of Air quality monitoring in April (table 4.5).

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standard value(mg/m3) Exceeded Standard Value

(mg/m3)

QCVN 05:2009/ BTNMT

QCVN 06:2009/ BTNMT

TCVN 6962:2001

Km 91+150

CO 3,801 3,801 3,801 30 - - 0 NOx 0,0327 0,0327 0,0327 0,2 - - 0 TSP 0,188 0,188 0,188 0,30 - - 0 SO2 0,119 0,119 0,119 0,35 - - 0 PM10 0,138 0,138 0,138 0,15 - - 0 Phenol KPH KPH KPH - 0,01 - 0 Vibration KPH KPH KPH - - 0,055 0

Km 95 + 100

Tan Thanh batching plant

CO 3,871 3,871 3,871 30 - - 0 NOx 0,043 0,043 0,043 0,2 - - 0 TSP 0,275 0,275 0,275 0,30 - - 0 SO2 0,071 0,071 0,071 0,35 - - 0 PM10 0,130 0,130 0,130 0,15 - - 0 Phenol KPH KPH KPH - 0,01 - 0 Vibration 0,041 0,041 0,041 - - 0,055 0

Km 88 + 300 to Km 88+500

Km 104 + 900 to Km 105 +

CO 3,855 3,855 3,855 30 - - 0 NOx 0,0531 0,0531 0,0531 0,2 - - 0 TSP 0,193 0,193 0,193 0,30 - - 0

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standard value(mg/m3) Exceeded Standard Value

(mg/m3)

QCVN 05:2009/ BTNMT

QCVN 06:2009/ BTNMT

TCVN 6962:2001

350 SO2 0,133 0,133 0,133 0,35 - - 0 PM10 0,142 0,142 0,142 0,15 - - 0 Phenol KPH KPH KPH - 0,01 - 0 Vibration 0,018 0,018 0,018 - - 0,055 0

Km 106 + 500 to Km 107 + 600

Km 106 + 227

Ambient air monitoring results at the positions are in the Standard Value pursuant to QCVN

05:2009/BTNMT, QCVN 06:2009/BTNMT, QCVN 27:2010/BTNMT.

During April, we have detected that all dump trucks was not covered and it spread soil on

existing roads at Km88+200 box culvert, Km97+124, Km107+533, Km105-Km109… hence,

dust was distributed much on these roads. The Contractor was strongly requested to cover all

dump trucks, clean existing road and spread water appropriately and after April 25th, 2012 if

they still delay we will force to stop work in site. The Consultant’s letter ref. GET2-KEA-A4-630

dated April 24th, 2012.

The result of Air quality monitoring in May (table 4.6).

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standardvalue(mg/m3) Exceeded Standard Value

(mg/m3)

QCVN 05:2009/ BTNMT

QCVN 06:2009/ BTNMT

TCVN 6962: 2001

Km 91+150

CO 3,601 3,603 3,602 30 - - 0 NOx 0,0410 0,0412 0,0411 0,2 - - 0 TSP 0,193 0,191 0,192 0,30 - - 0

Max. value

(mg/m3)

Min. value

(mg/m3)

Average value

(mg/m3)

Standardvalue(mg/m3) Exceeded Standard Value

(mg/m3)

QCVN 05:2009/ BTNMT

QCVN 06:2009/ BTNMT

TCVN 6962: 2001

SO2 0,134 0,132 0,133 0,35 - - 0 PM10 0,140 0,142 0,141 0,15 - - 0 Phenol KPH KPH KPH - 0,01 - 0 Vibration KPH KPH KPH - - 0,055 0

Km 95 + 100

Thanh batching

Km 88 + 300 to

Km 88+500

Km 104 + 900 to

Km 105 + 350

Km 106 +

500 to Km 107 +

Km 106 + 227

Ambient air monitoring results at the positions are in the Standard Value pursuant to QCVN

05:2009/BTNMT, QCVN 06:2009/BTNMT, QCVN 27:2010/BTNMT.

During May, we have detected that all dump trucks was not covered and it spread soil on

existing roads from section 1 to section 6. Hence, dust was distributed much in the air on dry

days. It gravely impacted to local people’s life. At some location (Km108+800), they set up

temporary barrier to stop all car or equipment go out or in construction site and requested

Contractor must spread water to minimize dust there. Consultant strongly requested

Contractor to cover all dump trucks, clean existing road and spread water appropriately but

they delay till May 12th 2012 they start spreading water for some existing roads at Km96-

Km97, Km106-Km107…

In inspection tour of ADB mission, they warned Contractor must water appropriately to

minimize dust and Contractor promise they will follow it. So Consultant will recheck carefully in

site on next month.

Consultant’s warning letter is ref.GET2-KEA-A4-638 dated May 4th, 2012 and GET2-KEA-A4-

680 dated June 1st, 2012.

In june, we have detected that all dump trucks was not covered and it spreads soil on existing

roads from section 1 to section 6. Hence, dust was distributed much in the air on dry days. It

gravely impacted to local people’s life. At some location (Km108+800), they set up temporary

barrier to stop all car or equipment go out or in construction site and requested Contractor

must spread water to minimize dust there.

4.1.5 Package A5

This month, through the inspection and supervision on site, the Consultant found that the

environment control and protection of the Contractor did not have much improvement. The

Contractor still failed to fully implement the measures to minimize the impacts on environment

in the process of construction and transportation of raw materials, such as:

- Most of the Contractor's trucks were not covered with canvas in the process of

construction and transportation of raw materials.

- The Contractor did not perform the watering to minimize dust generated on site as well

as on the materials transportation roads such as at Km111, Km112, Km123, Km145, ...

- At the factories of the Contractor such as the RC Pipe Culvert Factory No. 1 (Km117),

RC Pipe Culvert Factory No. 2 (Km132), concrete batching plant No. 1 (Km123),

concrete batching plant No. 2 (Km132), the Contractor did not apply any measures to

minimize dust during operation.

This has caused adverse impacts on the regional air quality. The Consultant has reminded the

Contractor on these outstanding issues (mentioned in Ref. GET3-KEANGNAM-12-A5-361

dated April 24, 2012). In addition, the Consultant has also required the Contractor to apply

adequate measures to minimize dust during construction and transportation of materials to

prevent adverse impacts on the regional air environment.

In the weekly site inspections, the Consultant has also frequently requested the Contractor to

fully comply with the Method Statement as well as the Environment control and protection plan

during construction to ensure the air quality.

This month, the Contractor carried out air quality observation on 15th April, 2012 in the

construction locations of the Contractor which are close to residential areas; the observation

results of air environment criteria are represented by the following table:

No Station/sampling point Parameter (µg/m3) SO2 CO NOx TSP PM10

Bao Long church (Km 117+050) A1 122 1465 109 112 65 A2 132 1343 169 143 56 A3 143 1409 171 167 88

Hop Minh My bridge (Km 118+820) A4 252 2633 163 189 83 A5 234 2541 173 201 103 A6 212 2251 162 213 79

QL37 bridge (Km 121+433) A7 163 2441 143 148 63 A8 154 1248 141 164 72 A9 176 2321 146 204 62

Min 122 1248 109 112 56 Max 252 2633 173 213 103 Mean 176.4 1961.3 153.0 171.2 74.6 QCVN 05 :2009- Cột 1 350 30000 200 300 -

At the present, the construction at monitoring locations mostly is site clearance and leveling

but not complex activities. The results showed that all of the measured values are lower than

referred correspondents stipulated in QCVN 05:2009-column 1.

Through the inspection and supervision on site, the Consultant found that there are still some

outstanding issues in the environment management of the Contractor during construction and

transportation of materials. This has affected the regional air environment, namely:

- The Contractor did not conduct water spraying to minimize dust generated during

construction and transportation of materials in some areas such as: Km111, Km117,

Km119, Km123, Km145, Km148...

- During the material transportation of the Contractor, most trucks were not covered with

canvas.

- The Contractor did not apply any measure to minimize dust generated in their factories,

such as the RC Pipe culvert factory No1 (Km117), RC Pipe culvert factory No 2

(Km132), concrete batching plant No 1 (Km123), concrete batching plant No 2

(Km132)...

To ensure the regional air environment, the Consultant has reminded the Contractor on these

outstanding issues (Ref. GET3-KEANGNAM-12-A5-438 dated May 16, 2012 and GET3-

KEANGNAM-12-A5-490 dated May 31, 2012). Besides, the Consultant has also required the

Contractor to quickly apply measures to resolve the outstanding issues. In addition, in the site

inspections, the Consultant has frequently required the Contractor to comply with the Method

Statement and the Environment Control and Protection Plan to prevent negative impact on the

region’s air environment during construction process.

This month, the Contractor carried out air quality observation on 10th May, 2012 in the

results of air environment criteria are represented by the table 4.8.

No Station/sampling point Parameter (µg/m3) SO2 CO NOx TSP PM10

QL37 bridge (Km 121+433) A7 209 2342 163 135 68 A8 178 1453 153 154 73 A9 181 2413 152 183 57

Min 113 1420 113 111 113 Max 267 2712 172 235 267 Mean 187,2 2059,1 153,6 163,6 187,2 QCVN 05 :2009- Cột 1 350 30000 200 300 -

environment control and protection of the Contractor in had not much improvement over the

previous month; there are still some outstanding issues unresolved, such as:

- Most of the Contractor's trucks were not equipped with canvases in the process of raw

materials transportation.

- The water spraying to minimize dust generated during construction and materials

transportation of the Contractor was not conducted on sites and on transportation roads

such as: Km111, Km113, Km117, Km130, Km145, Km148...

- Measures to minimize dust generated in the plants of the Contractor have not yet been

applied fully such as in the concrete batching plant No. 1 (Km123), concrete batching

plant No. 2 (Km132)...

- In the process of construction and materials transportation, soil dropped on the public

roads such as at Km123+680, Km126, Km145... this created dust when the vehicles

drove through this area, especially in hot days.

The Consultant has warned the Contractor on the outstanding issues in Ref. GET3-

KEANGNAM-12-A5-565 dated June 27, 2012. In addition, the Consultant has also required the

Contractor to quickly take steps to address them and ensure the regional air quality during the

This month, the Contractor carried out air quality observation on 15th May, 2012 in the

results of air environment criteria are represented in the table 4.9.

Table 4.9: Results of air quality in Package A5 in June, 2012.

No. Station/sampling point Parameter (µg/m3) SO2 CO NOx TSP PM10

QL37 bridge (Km 121+433) A7 212 2123 155 23 65 A8 167 1345 167 137 67 A9 168 2241 153 162 59

Min 121 1310 132 23 39 Max 253 2513 167 224 76 Mean 189.3 1894.6 151.8 142.8 59.6 QCVN 05 :2009- Cột 1 350 30000 200 300 -

4.1.6 Package A6

Contractor has continued to perform watering to minimize dust on the site at some locations

such as: Km157, Km184, Km186, Km187... Besides, in the month there were some rainy days,

so the amount of dust generated during construction process and transportation of raw

materials was reduced significantly.

However, in this month, there are still some outstanding issues as follows:

- Most of the Contractor's trucks were not carefully covered with canvas in the

transporting process of raw materials.

- At the construction locations Km151-Km152, Km174, many soil dropped on public

roads during transportation of rzaw materials of the Contractor; this has generated dust

in the hot days.

- At some stations such as Km174, Km176, Km165, Km183..., the watering work on the

public roads and on site has still not been carried out regularly. Therefore, on some hot

and windy days, the vehicles driving through these locations caused dust, which

affected the regional air quality.

- In the factories of the Contractor such as batching plant Km163, batching plant Km165,

batching plant Km180, measures for minimizing dust during production process were

not fully applied by the Contractor.

The Consultant has reminded the Contractor on these outstanding issues (Ref. -DOOSAN-12-

A6-387 dated 19 April 2012). Besides, in the site inspections, the Consultant has also required

the Contractor to strictly comply with the Method Statement and the Environment Control and

Protection Plan which were approved by the Consultant to prevent negative impact on air

environment from the process of construction and materials transportation of the Contractor.

Through the inspection and supervision on site this month, the Consultant found that

Contractor has still conducted water spraying to minimize dust at some construction locations

and transportation road of raw materials such as: Km157, Km158, Km165, Km184, Km185,

Km187... Besides, the amount of dust generated during construction and transportation of raw

materials has also been substantially reduced due to the number of rainy days in this month.

However, there are still some outstanding issues as follows:

- The Contractor's trucks were not covered with canvas in the process of transporting

raw materials.

- Soil was dropped on the public roads during construction and transportation such as at

Km151, Km159, Km174, Km157... this is the cause of the situation of dust when

vehicles drove on these public roads, especially in hot and windy day.

- The process of construction and materials transportation of the Contractor are

responsible for the generation of dust in areas such as: Km151, Km156+300,

Km156+475, Km161... The Contractor has carried out water spraying in these areas to

minimize dust, but the work was not done regularly and the frequency of water spraying

was less, so the amount of dust was generated in the process of raw materials

transporting, especially on sunny days.

- The Contractor has not yet fully applied measures to minimize dust generated during

operation of the factories such as the concrete batching plant Km163, Km165 and

Km180.

To ensure environment of the Project, the Consultant has reminded the Contractor on these

outstanding issues. Also, the Consultant has required the Contractor to apply measures to

minimize dust during construction, transportation (Ref. DOOSAN GET3-DOOSAN-12-A6-484

dated May 14, 2012) and during the operation of the Contractor’s batching plant (Ref. GET3-

DOOSAN-12-A6-452 dated May 3, 2012).

Besides, in the site inspections, the Consultant has required the Contractor to strictly comply

with the Method Statement and the Environment Control and Protection Plan approved by the

Consultant to prevent the negative effects on the air environment from the construction

activities and materials transportation of the Contractor.

Rainy season has started in this month, so there were many rainy days in the month, which

significantly reduced the amount of dust generated during construction and transportation of

raw materials. Besides, water spraying to ensure dust minority has being deployed in some

areas such as: Km157, Km156, Km165, Km176, Km185, Km184, etc.

However, through our inspection and supervision on site, we found that there were still some

outstanding issues which influence the air quality in the area as follow:

- In areas of Km151, Km165, Km155, Km174, ... there was a lot of soil spillage on public

roads during transportation of materials; besides, on a rainy day, the land from the

Project area flooded the public roads in the area of Km159 +690 , Km157+090,

Km155+220, Km151+200, etc., which was the cause of the condition of dust from traffic

vehicles in the area, especially in hot and windy day.

- Currently, most of the Contractor's truck did not make full use of canvas in the process

of transporting raw materials.

- In some areas such as: Km176, Km174, Km187, etc., although the Contractor carried

out water injection in these areas, the frequency of water spraying was not enough; so

it still underlied the condition of dust when a number of vehicles ran through this area,

especially on hot days, which affected the air quality in the region.

- In areas of concrete batching such as Km163, Km165, Km180, etc. measures to

minimize dust during operation were not fully applied.

The Consultant reminded the Contractor on the outstanding issues and we also required the

Contractor to implement measures to minimize dust generated during construction,

transportation of materials, in order to ensure air quality in the area (mentioned in Ref. GET3-

DOOSAN-12-A6-546 threads May 31, 2012 and GET3-DOOSAN-12-A6-569 threads June 9,

2012).

4.1.7 Package A7

In April, the air quality affected by material vehicles which were not covered by tarps and

watering was not frequent in sensitive areas.

Most material vehicles from Khe Lech quarry to section 2 of package A7 were not covered by

tarps in during April.

In addition some other activate as excavation or embankment also affect to ambient air quality

but acceptable.

On During time of May, the air quality affected by material vehicles which wasn’t cover by tarps

and watering didn’t frequently at sensitive area.

Most material vehicles from Khe Lech quarry to section2 of package A7 didn’t cover by tarps in

during May.

In addition some other activate as excavation or embankment also affect to ambient air quality

but acceptable.

Result of the Contractor air quality monitoring (carried out by Institute of Environmental

technology in April 2012) showed that construction works not effected to ambient air quality.

Sample

Monitoring parameters

TSP (µg/m3) CO (µg/m3) SO2 (µg/m3) NO2 (µg/m3)

1 KK01 32 930 63 27 2 KK02 39 1730 70 39 3 KK03 34 2251 77 41 4 KK04 34 2020 113 35 5 KK05 25 940 143 28 6 KK06 26 1110 67 29 7 KK07 30 1068 57 27 8 KK08 36 1827 117 32 9 KK09 25 930 83 28

Sample

Monitoring parameters

TSP (µg/m3) CO (µg/m3) SO2 (µg/m3) NO2 (µg/m3)

10 KK10 26 1116 67 30 11 KK11 37 1102 57 32 12 KK12 36 2520 60 35 13 KK13 52 1742 93 29 14 KK14 28 994 97 25 QCVN 05: 2009/BTNMT QCVN 06: 2009/BTNMT

300 30,000 350 -

KK01: Xuan Sang 1 Primary School, Xuan Sang 1 Hamlet, Tan An Commune, Van ban District

(coordinates N: 22007.895’; E:104023.844’)

KK02: Concrete mixing plant No.1, Ngam Thin Hamlet, Tan Thuong Commune, Van Ban

District (coordinates N: 22009.615’; E:104020.459’)

KK03: Concrete mixing plant No.2, Dap Tran Hamlet, Tan Thuong Commune, Van Ban District

(coordinates N: 22009.249’; E:104020.751’)

KK04: Bridge girder casting yard, Xuan Sang 2 Hamlet, Tan An Commune, Van Ban District

(coordinates N: 22007.442’; E:104024.026’)

KK05: Equipment gathering yard, worker’s living area, Khe U Hamlet, Tan Thuong Commune,

Van Ban District (coordinates N: 22011.545’; E:104019.420’)

KK06: Cam Con Primary School, Khe Mai Hamlet, Cam Con Commune, Bao Yen District

(coordinates N: 22012.167’; E:104018.523’)

KK07: Cam Con Health Center, Tan Tien Commune, Bao Yen District (coordinates N:

22014.142’; E:104016.553’)

KK08: Drainage casting yard No.1, Khe Quat Hamlet, Tan An Commune, Van Ban District

(coordinates N: 22008.585’; E:104022.537’)

KK09: Khe U Primary School, Khe U Hamlet, Tan Thuong Commune, Van Ban District

(coordinates N: 22011.604’; E:104019.474’)

KK10: Residential areas at the right side of project road, Ban Ly Hamlet, Cam Con Commune,

Bao Yen District (coordinates N: 22012.217’; E:104018.563’)

KK11: Tan Thuong Secondary School, Khe Tep Hamlet, Tan Thuong Commune, Van Ban

District (coordinates N: 22011.021’; E:104020.370’)

KK12: Drainage casting yard No.2, Bong 1 Hamlet, Cam Con Commune, Bao Yen District

(coordinates N: 22013.532’; E:104016.995’)

KK13: Cam Con Secondary School, Hamlet 2, Cam Con Commune, Bao Yen District

(coordinates N: 22014.380’; E:104016.388’)

KK14: Tan An Kinder Garden, Tan Duong Hamlet, Tan An Commune, Van Ban District

(coordinates N: 22009.511’; E:104021.960’)

The results of air quality environmental monitoring in the above table are compared with the

limit values in the standards; it shows that most of the observation results are lower than the

prescribed limit values and ranges:

+ Dust concentration: Between 25 to 52 µg/m3,

+ CO concentration: Between 930 to 2520 µg/m3,

+ SO2 concentrations: Between 57 to 143 µg/m3,

+ NO2 concentration: Between 27 to 41 µg/m3,

During on June 2012 the contractor construction works the base and subbase layers at

section1; section2 and section3 with watering car according to project regulation in order to

mitigate the concentration of dust avoid effect to local people. Hence during the transfer

material (base and subbase) the contactor haven’t consequence watering along the exits

road, these are effects to local people, especial at section 3 Km207-Km218+040 date 28-June

So consultant required the contractor to consequences watering in order to mitigate

concentration of dust avoid effect to local people.

4.1.8 Package A8

In April 2012, the contractor concentrated construction works the sub-base at Km238-

Km239+300 and foundation road belong package A8 combination with dry season created

dust on site, which can affect to ambient air quality. Hence consultant required the contractor

to support the watering car to decrease dust concentration and not effect to ambient air quality.

The contractors are reminded in letters No Ref. GET4- Vinaconex- 534.

On 16- May 2012 the contractor concentrated construction works the sub-base at Km238-

Km239+300 and foundation road belong package A8 combination with dry season created

dust on site, which can effect to ambient air quality. Hence consultant required the contractor

to support the watering car to decrease dust concentration and not effect to ambient air quality.

During on June 2012 the contractor construction works the base and subbase layers at

Km238-Km239+300 with watering car according to project regulation in order to mitigate the

concentration of dust avoid effect to local people. Hence during the transfer material (base and

subbase) the contactor haven’t consequence watering along the exits road, these are effects

to local people, especial at Km218+040- Km225+000.

So consultant required the contractor to consequences watering in order to mitigate

concentration of dust avoid effect to local people.

4.2 IMPACT ON WATER RESOURCES

4.2.1 Package A1

There is no improvement in last month at Tan Loi Bridge; however, the Contractor also does

not worsen the situation. The PSC still closes the procedures of payment of progress of all

items of this work until the Contractor corrects defects.

The similar status was also recorded at Underpass NH2, the direct discharge of untreated

wastewater containing sand and mud into existing irrigation canal is still going on. The PSC

has strongly warned the Contractor and if he still fails to meet our requirements we will

consider applying the measure of money deduction. The next site inspection will be held on

May 03, 2012 to check the implementation of the Contractor.

At other sections, we did not see the serious problem happening during the site inspections.

In the site inspections this month, we still found that at Tan Loi Bridge the Contractor has not

taken any action to improve the status here. Due to the heavy rains, Piers 2 and 3 construction

site is now under the water.

At Underpass NH2 the Contractor constructed a sediment basin to catch sediment from

wastewater before discharge of it offsite. However, the capacity of this device is not enough

and the PSC has requested the Contractor to construct one more to ensure that the sediment

is not spilled-over existing drainage. And this time is in harvest and straw is available, so traw

bales were recommended as a sediment check dam to be installed at outlet of untreated

wastewater discharge area to remove sediment from wastewater.

At other sections, we did not see the serious problem happening during the site inspections.

In the site inspections this month, we still found that at Tan Loi Bridge the Contractor has not

taken any action to improve the status here. Due to the heavy rains, Piers 2 and 3 construction

site is now under the water.

At Underpass NH2 the Contractor constructed a sediment basin to catch sediment from

wastewater before discharge of it offsite. However, the capacity of this device is not enough

and the PSC has requested the Contractor to construct one more to ensure that the sediment

is not spilled-over existing drainage. And this time is in harvest and straw is available, so traw

bales were recommended as a sediment check dam to be installed at outlet of untreated

watewater discharge area to remove sediment from wastewater.

At other sections, we didn’t see the serious problem happening during the site inspections.

4.2.2 Package A2

In the site inspections we found that there is no improvement at Ben Tre Bridge; however, the

Contractor also does not let the problem worse. The procedures of payment progress

suspension of all items of this work is still going on until the Contractor corrects the defects

completely.

At Muong Dao and Ban Gao Bridge, we perceived that the Contractor still didn’t take any

action to correct the issues and he even discharged the untreated wastewater that contains

sand and mud directly into river at Ben Gao Bridge. The PSC has many times requested the

Contractor to solve these problems as well as instructed him how to treat wastewater before

discharge of it but there was no improvement recorded. For Ben Gao Bridge, we have already

recommended the Employer to deduct money due to the Contractor didn’t solve the problems

and let them worsened. We also still close the procedures of payment progress of all items of

these works until the Contractor implements our requirements.

On Mar 28, we found that the Contractor had discharged the bentonite slurry into river at Pier 7

of Lo River Bridge. The PSC has strongly warned the Contractor and requested him to stop

this activity. However, in the site inspection on April 11, we again found that he already

disposed all the bentonite slurry, sand and mud – by product due to bentonite slurry recycle

into river at the place as before. The PSC has requested the Contractor to remove all the

unsuitable material that remains on riverside concomitant with persons in charge discipline.

At Batch Plant 2 of Lo River Bridge, the improvement is very behindhand. The settling pond is

very unsettled and it seems to be broken easily in heavy rain. There is also no drainage on

surface to handle the surfaced runoff so the surfaced wastewater could flow directly into river

in the rain.

At other places, we didn’t detect any serious problem happening during the site inspections

this month.

In the site inspections we found that there is no improvement at Ben Tre Bridge; however, the

Contractor also does not let the problem worse. The procedures of payment progress

suspension of all items of this work is still going on until the Contractor corrects the defects

completely.

At Muong Dao and Ban Gao Bridge, we perceived that the Contractor still did not take any