Petronas Temana project Summary

8/9/2019 Petronas Temana project Summary

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Preliminary Environmental Impact Assessment (EIA)for Temana Redevelopment Project, Bintulu, Sarawak Executive Summary

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EXECUTIVE SUMMARY

1. INTRODUCTION

This report presents the findings of the Environmental Impact Assessment (EIA) carried outfor the redevelopment of Temana Field. The proposed Temana Redevelopment Project islocated approximately 43 km offshore Bintulu, Sarawak.

The EIA Report is prepared in an integrated manner to assess the potential environmentalimpacts that may arise from the proposed offshore pipelines installation, platformconstruction, modification and construction of onshore facilities.

Project Title

This Environmental Impact Ass essment (EIA) report has been prepared for TEMANAREDEVELOPMENT PROJECT, BINTULU, SARAWAK , hereinafter to be referred as theProject'.

Environmental Legislative Requirement

The Temana Revelopment Project involves enhanced oil recovery development whichincludes installation of new pipelines, platform and water injection system. Thus, this Projectwill fall under the prescribed activity stipulated under the Item 12 of Environmental Quality(Prescribed Activities) (Environmental Impact Assessment) Order 1987 , as follows:

ITEM 12: PETROLEUM

(a) Oil and gas field development.

In accordance with the requirements of Section 34A of the Environmental Quality Act 1974 ,the Project Proponent is required to submit an Environmental Impact Assessment report forthe Project for the approval of the Department of Environment (DOE), prior to projectimplementation.


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Project Proponent

The Project Proponent is PETRONAS Carigali Sdn . Bhd . with their correspondenceaddress and contact person as follows:

Temana Redevelopment Project PETRONAS Carigali Sdn. Bhd. Level 23, Tower 1, PETRONAS Twin TowersKuala Lumpur City Centre 50088 Kuala Lumpur

Contact Person: Ir. Jazdi Bin Jabil (Project Manager)Tel. No : 03-2331 3821Fax No : 03-2331 8437

EIA Consultant

Scientige Sdn Bhd (SSB) in collaboration with Golden Ecosystem Sdn Bhd (GESB) wasappointed as the Environmental Consultants to carry out the Environmental Impact

Assessment study for this Project. Enquiries and correspondences pertaining to this reportcan be made to:

Scientige Sdn. Bhd. (712879-H)Level 11, Menara Dayabumi,

Jalan Sultan Hishamuddin,50550 Kuala Lumpur.

Contact Person: En. Mohammad Aman SamsureyTel. No : 03-2267 2888Fax No : 03-2272 2046Email : [email protected]

Golden Ecosystem Sdn. Bhd. (534338-P)48-3A, Jalan PJU 5/9, Dataran Sunway,Kota Damansara,47810 Petaling Jaya,Selangor.

Contact Person: En. Azemi Bin Abu Bakar Tel. No : 03-6140 9701Fax. No : 03-6140 9702Email : [email protected]


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Project Location

The Project is located within Temana Field which is in the Balingian geological province,approximately 43 km offshore Bintulu, Sarawak in water depth of between 25.1 m to 31.7 m.BCOT (Bintulu Crude Oil Terminal) is located onshore in Bintulu, Sarawak and is thereceiving terminal for this Project. Figure ES-1 shows the Temana Field location.

Figure ES-1: Project Location

Statement of Need

The Temana Redevelopment Project involves reviewing and assessing the resourcepotential and evaluating the options on resources development strategy as well as surfacefacilities optimization. The Project involves re-utilization of non productive wells. The mainobjective of the Temana Redevelopment Project is to improve the recovery factor from34% to 56% (End of field life) with incremental reserves of 37.8 million stock tank barrels(MMstb) crude oil through infill wells and pressure maintenance (water injection) by August2014.

The prospective resources identified from a recent appraisal well discovery by optimizing theexisting asset such as platform slot, idle well and other production facilities. Based on detailreservoir simulation study, the optimum production rate is expected to be about 7,000 stocktank barrels per day (stb/d) from three (3) infill development wells.


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2. PROJECT DESCRIPTION

PETRONAS Carigali will be implementing the redevelopment of Temana Field. The TemanaRedevelopment project comprises mainly the development of I-60 and I-65 reservoirs withthe objective of improving recovery factor of 34% to 56% (end of life) with incrementalreserves of 37.8 MMstb crude oil through new infill wells and pressure maintenance (waterinjection) by August 2014.

Figure ES-2 shows the schematic layout of the Project components.

Project Components

The Project comprises five (5) components:

1. New Onshore facilities: Temana Water Injection Module (TEWIM);2. New Offshore facilities: Temana Water Intake Platform (TEWI) and Drilling platform

(TEJT-D);3. Infill drilling: TEJT-D (new facility), TEJT-C and TEJT-W (existing facilities);4. New offshore pipeline installation of six (6) new pipelines:

o 10 x 3.7 km seawater intake pipeline from TEWI to TEWIM o 10 x 37 km water injection pipeline from TEWIM to TEJT -Do 6 x 6 km water injection pipeline from TEJT -D to TEJT-Co 6 x 1.1 km water injection pipeline from TEJT-C to TEJT-Wo 8 x 7.5 km fuel well stream (FWS) pipeline from TEJT-D to TEK-Ao 6 x 2.5 km gas pipeline from TEJT -T to TEJT-D

5. Platform modification and pipeline host tie-in on the existing platform

Project Implementation

The execution of offshore works are scheduled to be within 15 months beginning of August2013 until end of October 2014, whilst execution of onshore works are expected to becompleted within a 14 month period beginning of September 2013 until end of October 2014.


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Figure ES-2: Schematic Layout of the Proposed Temana Redevelopment Project


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3. EXISTING ENVIRONMENT

Landuse

The onshore Project site (TEWIM) is currently a green and vacant land. Land usesurrounding the site within 1 km radius consists of BCOT facilities and MLNG facilities. Landuse surrounding the site up to 2 km radius mainly consists of oil, gas and petrochemicalplants such as MLNG DUA, MLNG TIGA, Shell Middle Distillate Synthesis (SMDS) and

Asian Bintulu Fertilizer (ABF). The land use between 2 km to 3 km radius surrounding thesite is the Bintulu Port, Kidurong Industrial Area (KINDA) and SESCO Power Station. Theland to the west is a vacant industrial lot. The nearest residential areas are Kampong SungaiPlan Lot and some squatters area which are located at 4.3 km southeast of the site.

BathymetryWater depth for the area near the existing platforms and the proposed platform ranged from25.1 m to 31.7 m and the seabed level of the study area was slightly dipping to the north withgeneral gradient of 1:1030 (


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Oceanography

The tidal regime in Bintulu is predominantly diurnal, implying that there is one high water andone low water occurence during a tidal day. Bintulu experiences two (2) monsoonal changes.The Northeast Monsoon which usually occurs between November to February brings strongwinds and heavy rainfall. Southwest Monsoon, which prevails during the later half of May orearly June to September, brings less intense rainfall. The scalar mean wind speeds are highfrom December to February which is during the Northeast monsoon. The wind wave andswell wave are high from November to March which is during the Northeast monsoon.

Meteorology

The climate of the study area is typically tropical with uniform temperature, high humidity andheavy rainfall. The climate is strongly influenced by the Southwest and Northeast Monsoons.

The climatic data used in this report is based on data taken at Bintulu Station from MalaysianMeteorological Department for a period between 2001 to 2010.

Baseline Study

Baseline sampling for marine water quality and seabed sediment quality was carried outfrom 1 st June to 10 th June 2011. 27 sampling stations were located along five (5) platformsand four (4) pipelines. One (1) control station designated as C1 was located atapproximately 2 km away from the Project site.

Marine Water Quality

Overall, all parameters analyzed for marine water quality were within the Marine WaterQuality Criteria and Standards for Malaysia (Class 3 Ports, Oil & Gas Field) (MWQCS).

TemperatureThe temperature levels are comparable with the typical range for South China Sea (28C 32C) (Nasir, et. al., 1988). Hence the recorded temperatures reflect the normal temperatureof the South China Sea.

pH ValueThis value is comparable to the Control Station (STC) which had an average of 7.74. The pHlevels were within the recommended level for aquatic environment (6.5 8.5), (Liong andSubramaniam, 1990).

SalinityThe average results are comparable with the STC average level of 32.52ppt. It can beconsidered that the water quality at the Temana Field is within the typical range of SouthChina Sea which is 32 ppt 35 ppt (Nasir, et. al., 1988).

Total Dissolved SolidsBased on the typical range for the South China Sea which is >35,000mg/l (Siobhan, 2011),the TDS levels observed during this study are within this range indicating normal conditions.


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Dissolved OxygenThe DO levels recorded at the study area were higher than the Class 3 limit (3mg/l) byMWQCS. The higher DO levels indicate that the water quality at the sampling stations is wellaerated and healthy.

Total Suspended Solid Although the average value is slightly higher than the control station value of 4 mg/l but itwas much lower than the MWQCS limits of 100 mg/L. These results indicate that the area isnot experiencing much disturbance in terms of sediment suspension.

Total Organic Carbon and Total NitrogenResults from the sampling conducted indicate that the nutrition status of the Temana Field isrelatively good.

Nitrate

The waters around the Temana Field in terms of nitrate shows a condusive environment forthe growth of marine plants as nitrate is a source of food.

Total Phosphate, Ammoniacal Nitrogen, Total Petroleum Hydrocarbons and Oil &Grease

The Project area during the sampling period is relatively unpolluted and results are within theregulatory limits for the oil and gas industry in terms of these parameters. These levelsindicate low level of hydrocarbon pollutants in the area.

Heavy metalsIt can be inferred that there is no heavy metal pollution in the study area during this samplingperiod.

Seabed Sediment

Overall, all parameters analyzed were within the Dutch Intervention Values (DIV).

Marine Biology

PhytoplanktonGenerally, twenty one (21) genus were recorded within the sampling locations. Diatomswere found to be the most dominant group followed by Dinoflagellates. Densities ofphytoplankton recorded at all sampling locations ranged from 1.21 x 10 3 no. per litre to

11.55 x 103

no. per litre. The Shannon-Wiener Diversity Indices (H) of the phytoplanktoncommunities at all sampling locations ranged from 1.03 to 1.88 which indicate that thewaters within the Temana Field is considered to have a healthy phytoplankton growthand low level of pollution. It can also be concluded that there is a diverse phytoplanktonspecies in this study area.

ZooplanktonTwelve (12) different genus of zooplankton were identified within the study area and ismostly dominated by the Copepods. The densities of zooplankton ranged from 0.11 no.per liter (x10 3) to 3.19 no. per liter (x10 3) with an average value of 0.63 no. per liter (x10 3).The average value recorded for all stations monitored along the pipeline route wasslightly lower compared to the control station value (0.88 no. per liter (X10 3). Shannon-

Wiener Diversity Indices (H) for this area are considered to have low diversity ofzooplankton which ranged from 0.00 to 1.59 with an average of 0.69.


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MacrobenthosThe most abundant phylum in the study area was identified to be Molluscs followed byPisces and Annelida, Anthropoda and Echinodermata. Macrobenthos density for alllocations ranged from 7,920 ind/m 2 to 55,660 ind/m 2 and were lower than the ControlStation (STC) level of 43,824 ind/m 3. The Shannon-Wiener Diversity Indices (H) rangedfrom a value of 1.44 to 2.39 which are comparable to Control Station (STC) with value of1.69. Based on the Diversity Index, it can be concluded that this study area experienceslow levels of pollution

Coral

There is a small coral reef, known as Batu Mandi located about 4 km offshore of KualaSungai Likau, near the national park headquarters office and approximately 35 km fromTemana Field. The area can be noticeable from the national park only during low tide.

Therefore, as the Project site is located far away from environmental sensitive areas, there isno concern in terms of potential impacts from the proposed Project development.

Turtle

In Sarawak, there are five (5) main species of turtles with 95% of all turtle landings inSarawak are found at the Turtle Island, which consists of Talang-Talang Besar, Talang-Talang Kecil and Satang Besar. Turtle landings are also found along Kampong Puguh offSemantan and off the Similajau near Bintulu. Turtle Island is located about 33 km NorthWest of Kuching and 390 km South West of Bintulu. The Project site is far away from turtlemigration route and landing area.

FisheryIn Sarawak, fisheries can generally be categorized as traditional and commercial fishing.Traditional fishing is usually conducted in near shore waters using traditional fishing gear(drift nets, seine nets, stake nets, hook and line). Commercial fisheries comprise inshorefisheries and offshore fisheries. The common commercial fishing gears are trawl nets andpurse seine nets. Fishing activities are most active during the month of April where the seacondition is more condusive for fishing activities. Majority of fishermen in Bintulu are coastalfishermen.

Marine Traffic

The main port nearest to the Project site is the Bintulu Port. The distance from TemanaPlatform B (TEP-B) to the Bintulu Port is about 30 km. The average daily arrival anddeparture of coastal vessel recorded from 2005 2009 from Bintulu Port are 13 vessels perday. As for marine traffic recorded for foreign vessels, average of 17 vessels per day wererecorded at Bintulu Port. As such, PETRONAS Carigali will need to plan the navigationalactivities during the pipeline installation and establish proper communication with the MarineDepartment of Sarawak.


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4 SOCIO-ECONOMY

The objective of this socio-economic assessment is to understand the current social andeconomic status of individuals, households, groups and communities within the Project area.

Although the Project site encompasses onshore and offshore work, this socio-economicsurvey covers only the onshore communities within a radius of 5km from the boundaries ofBCOT. The methodology involves data collection which included primary and secondarydata sources.

Findings of the survey indicated that, as the residential areas were located far away fromboth offshore Project activities (approximately 43 km) and also onshore Project activities(approximately 4.3 km), the redevelopment activities at Temana did not have any potentialnegative impacts. However, positive economic impacts such as creation of employmentopportunities and increase in household income are anticipated.

The presence of the Project pipelines and platform is unlikely to impact the fishery activitiesin this locality since Temana is an existing field. The BCOT Marine Safety and Security Zoneis already a restricted area since the late 1970s , the pipelines and platform are not expectedto impact fishing activities. During pipeline installation activities, it is estimated that an areaof about 3 km 2 at one particular time will be restricted to the navigational activities(particularly fishermen boats) to avoid incidents such as collision of vessels.

As a responsible multinational corporate organisation, PETRONAS is committed tocontribute to societal needs in its development of Malaysias oil and gas resources as part oftheir corporate sustainability agenda. Corporate Social Responsibility (CSR) programmeshave been conducted both locally in Malaysia and also internationally in countries where

PETRONAS has operations. PETRONAS provides an avenue for the fishermen to voice outtheir opinions and requirements through annual engagements with the Fishermen Association and in the presence of Sarawak Fisheries Department. Besides the communityengagements, PETRONAS has also conducted many social programmes for the public inSarawak and other states in Malaysia as part of their CSR contribution to the society.

5 IMPACT AND MITIGATION MEASURES

The impact assessments for this Project were prepared based on the Project activities suchas pipeline installation, construction of platform and TEWIM facilities, hook-up, testing andpre-Commissioning, operation and abandonment and decommissioning.

With implementation of recommended mitigation measures throughout project execution assummarized in Table ES-1 , the assessment on potential environmental impacts that mayarise from project activities have been found to be mainly localized, short-term andinsignificant.


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Table ES-1: Impact Assessment and Proposed Mitigation Measures

Project Activity Impact Assessment Proposed Mitigation MeasuresOFFSHORE INSTALLATION ACTIVITIESInstallation works at theoffshore comprises thefollowing activities:

Transportation of

materials; Pipeline and platform

installation; and

Vessel anchoring andpipeline laying.

Atmospheric Emission Emission sources to the atmosphere during the pipe

laying and platform installation activities are mainly fromgenerators, welding equipment and barge exhaust. Othersources of emission are fugitive release of volatile

organic compounds from fuel bunkering activities andcleaning solvent. Overall impacts from these emissionsources are expected to be insignificant since theemission will be mainly transient in nature.

All engines and machinery used must be wellmaintained to ensure complete combustion of fuel toreduce or eliminate black smoke emission.

Volatile chemicals containers must be tightly closed and

stored in a cool room at all time.

Water Quality The deck drainage, engine cooling water and bilge from

the vessels involved in the pipeline and platforminstallation works are of concern as they may contain lowlevels of oil and grease. Engine cooling water quantitiesare generally small and therefore the effect of theelevated temperatures on the marine waters will not besignificant.

There will be generation of sewage and domesticwastewater from a number of personnel on board thevarious vessels. The sewage and domestic wastewaters

and their respective pollutant loads can be consideredrelatively small against the vast ocean waters. The largerpipeline installation vessels and support vessels are likelyto provide basic treatment of sewage prior to discharge tosea.

Accidental spillage of diesel fuel and/or lubricating oils insignificant amount will result in the formation of visiblesurface sheen in the marine waters. These will affect thefish population.

The vessels are usually fitted with suitable slop tanksfor the collection of waste oils (scheduled wastes).Used oil and spent/waste oil generated during theconstruction works from machines, generators, etc.shall be collected and disposed off-site by licensedcontractors.

Storage and handling of scheduled wastes is to becarried out according to the Environmental Quality(Scheduled Wastes) Regulations, 2005.

Oily effluents from the vessels must be treated to meet

MARPOL requirements of 15 mg/l. Emergency response and contingency plans will be putin place for response to accidental events.

Oil spill kits which shall include absorbent pads will bemade available onboard the vessels, which can be usedto arrest spills onboard the vessel, preventingcontamination of the deck area and minimize thedischarge of oily deck runoffs into the marine waters.


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Project Activity Impact Assessment Proposed Mitigation MeasuresOffshore InstallationActivities (cont)

Seabed Sediment

The anchoring activities of pipeline and platforminstallation vessels, such as the conventionally mooredpipe lay barge, will leave behind anchor scars on theseabed floor. The anchor scars can remain over asubstantial period of time and the disturbances to theseabed morphology are usually of medium term duration.Destruction of benthic habitats is the main concern;however, the effects are often localized and the loss ofbenthic habitats temporary due to re-colonization within ashort duration after the disturbances have ceased.

Extent of this impact will only be experienced at theanchor drop location along the pipeline route. Therefore,the potential impact will not be significant since the lengthof pipelines to be installed is between 1.1 km 37.0 km.

The installation period should be optimized to reducethe installation time; thus re-colonization orreestablishment of new communities will occur in ashorter duration.

Anchors should be placed at pre-determined locationsas per approved anchor pattern to minimize the risk ofanchors dragging which could smother the benthic

organism. Select pipeline route and tow path to minimize impact. Deploy ROV to visually inspect the pipeline to ensure

that the pipelines are installed properly on the seabed. Use support vessels to deploy and recover anchors and

anchor pennants to lift the anchors.

Underwater Noise Emissions and Vibration Underwater noise emissions and sonic vibration will be

caused by the installation activities of the pipelines andplatform and from the vessels. However, the potential foradverse impacts to these marine mammals is relative lowgiven that the installation activities are short-term, and theusual tendency for the marine mammals to move awayfrom the source of noise.

The installation activity should be optimized to reducethe installation time, and to reduce disturbance tomarine life.

Marine Biology During the pipeline installation, selected activities such as

anchoring and physical placements of the pipelines onthe seabed may increase the turbidity level which coulddisturb and smothered sedentary organisms. This mayresult in loss of benthic and bottom feeding organisms.Non sedentary organisms will not be affected since theywill leave the impacted area.

The installation activity should be optimized to reducethe installation time to reduce disturbance to marine life.

Planning of anchoring pattern to avoid unnecessaryscars and to minimize the risk of anchors draggingwhich could smother the benthic organism. Avoid softgrounds which are prone to anchor dragging.

Pre-determine selected pipeline routes and tow path tominimize impact to the bottom sediment.


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Project Activity Impact Assessment Proposed Mitigation MeasuresOffshore InstallationActivities (cont)

However, these changes to the benthic communities willbe temporary and will occur during installation activity.Once the physical environment is back to normal, whichnormally after a 2 month duration the benthic organismswill recolonize the area. Treated sewage discharged byvessels is not expected to cause significant impact tomarine biological ecosystem.

Solid Waste Management Solid wastes generated from the vessels can be

categorized as domestic wastes, non-scheduled wastesand scheduled wastes.

Domestic wastes include food and kitchen wastesgenerated from personnel onboard the vessels. Theseorganic and biodegradable wastes will be maceratedand disposed into the sea. Due to the high assimilativecapacity of the sea, rapid dispersion by the watercurrent and biodegradable nature of food waste; theimpact on the marine water quality and biologicalsystem would be insignificant.

Industrial wastes generated are mainly packingmaterials, rags and used oil. These wastes will besegregated into scheduled and non-scheduled wastesand transported onshore for final disposal. Wastegenerated will be minimal in quantity therefore its impactwill be insignificant. Improper disposal and management

of scheduled wastes can result in contamination of seawater.

Proper on-site collection bins should be provided. Thesolid waste shall be collected and removed by acontractor to an approved waste disposal siteonshore.

Used oil and spent/ waste oil generated during theconstruction works from machines, generators, etc.shall be collected and disposed off-site by licensedcontractors.

Storage and handling of scheduled wastes is to becarried out according to the Environmental Quality(Scheduled Wastes) Regulations, 2005.

The wastes should be stored in sealed drums, labeledand placed in a designated scheduled waste storagearea.

Separate compartments should be provided fordifferent groups of incompatible wastes.

Empty storage containers for chemicals andpetroleum products shall be removed off-site by aregistered contractor.

The quantity of scheduled wastes accumulated on siteshall not exceed 20 metric tons and the wastes storedfor a period not exceeding 180 days.


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Project Activity Impact Assessment Proposed Mitigation MeasuresOnshore InstallationActivities (cont)

Air Quality The TEWIM construction area will experience release of

dust fom vehicle movement and exhaust emissions intothe atmosphere from the fuel-burning machinery andconstruction equipment. The impacts are expected to betransient and minor due to rapid dispersion and dilutionexperienced at coastal areas due to favourable coastalwind conditions. The air quality impacts therefore will not

be significant.

Vehicles leaving and entering the TEWIM constructionsite are to be maintained at all times to avoidcontamination of the surrounding areas and publicroads. A wash trough will be provided at the exit of theconstruction site.

Wetting down of the TEWIM Project site to minimizefugitive dust-emission in and around the construction

site. Prevention of spillage of excavated materials for site

preparation onto roadways during transportation byproper covering of lorry loads with canvas to avoid dustpollution.

Proper vehicle and machinery maintenance to limit airemissions.

Noise Noise will be generated by construction equipments and

machineries. With the known open nature of the shoreline area and the

site is away from residential areas, the noise impacts tothe public at large will not be significant.

Noisy equipment if any shall be provided with temporaryenclosures to shield adjacent areas from noise as muchas possible.

Proper vehicle and machinery maintenance to limitnoise emissions.

Provide proper personal protection equipments (PPE) toworkers.

Sewage It is estimated that there will be between 50 to 100

workers onsite for the construction activities, resulting inlow generation of sewage. As the duration of theconstruction is short term, it is anticipated that the impactwill be minimal.

Mobile toilets used at the construction site should bewell maintained and the sewage tanks must bedesludged regularly and treated prior to any discharge.


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Project Activity Impact Assessment Proposed Mitigation MeasuresOnshore InstallationActivities (cont)

Solid Wastes Relatively low quantities of domestic solid wastes will be

generated by workers on-site as the numbers of theworkers are estimated to be between 50 to 100 persons.Taking into the account that the construction period islimited to only 14 months and with regular collection of thewastes, the impact is expected to be insignificant.

Industrial wastes generated are mainly packing materials,

rags and used oil. These wastes will be segregated intoscheduled and non-scheduled wastes and storedappropriately prior to final disposal. Waste generated willbe minimal in quantity therefore its impact will beinsignificant.

Proper on-site collection bins should be provided. Thedomestic solid waste shall be collected and removed bya licensed contractor prior to disposal at the nearestdisposal site which is the Kidurong Dumpsite locatedapproximately 5 km southeast of the BCOT.

Construction waste shall be disposed off in a Localauthority approved disposal site.

Scheduled wastes must be collected and disposed bylicensed scheduled waste contractors which areTrieneken (Sarawak) Sdn Bhd.

Storage and handling of scheduled waste is to becarried out according to the Environmental Quality(Scheduled Wastes) Regulations, 2005.

Proper transfer of scheduled wastes from drums ormachinery to vehicles must be practiced.

Used oil and spent/ waste oil generated during theconstruction works from machines, generators, etc.shall be collected and disposed at an approved site.

The wastes should be stored in sealed drums, labeledand placed in a designated scheduled waste storagearea.

Separate compartments should be provided for differentgroups of incompatible wastes.

Empty storage containers for chemicals and petroleumproducts shall be removed off-site by a licensedcontractor.

The quantity of scheduled wastes accumulated on siteshall not exceed 20 metric tons and the wastes storedfor a period not exceeding 180 days.


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Project Activity Impact Assessment Proposed Mitigation MeasuresHOOK-UP, TESTING AND PRE-COMMISSIONING PHASE Cleaning and gauging Hydrotesting

Seawater and Seabed Quality The discharged water will release colored plume into the

sea resulting from the use of tracer dye. The corrosion inhibitor used, Cortron O-3670R is a toxic

and corrosive solution.

Chemicals selected will be environmentally friendly withlow toxicity. In addition, these chemicals should belisted on the OCNS list and preferably be in the gold orsilver categories.

Concentrations used must be the lowest effectiveconcentration possible.

The discharge of the hydrotest water will be regulatedat predetermined rate.

Strict adherence to the instruction and precautionstated in the respective MSDS of the differentchemicals used at all time.

Unused chemicals should be properly stored anddisposed at an approved location.

OPERATION

Operation of the pipeline,platform, TEWI and TEWIM

Fishing Activities The presence of the Project pipelines and platform is

unlikely to impact the fishery activities in this locality. TheBCOT Marine Safety and Security Zone are already arestricted area thus, the installation of pipelines andplatform are not expected to impact fishing activities in thelocality significantly.

The pipelines and platform locations will also be markedon admiralty and associated nautical charts.

Fishing operators in the area will be made aware of thelocation of the pipelines through Marine Department andFisheries Department.

During pipeline installation activities, it is estimated thatan area of about 3 km 2 at one particular time will berestricted to the navigational activities (particularlyfishermen boats) to avoid incidents such as collision ofvessels.


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Project Activity Impact Assessment Proposed Mitigation MeasuresOperation (cont) Air Quality

Emissions produced by the combustion of gas or liquidsin turbines, boilers, compressors, pumps or other enginesfor power or heat generation, or for water injection, or gasexport can be a significant source of localized airemissions from offshore facilities.

Taking into account that the Project is located in the opensea area and far away f rom residential area, thereforethere are no sensitive receptors identified.

Leakage of gas can result from uncontrolled corrosion,physical impact and undetected material defects. Gasfrom minor leakages will usually be subjected to rapiddissipation upon reaching the water surface; the impactsto water quality and marine habitat are therefore notexpected to be significant.

During equipment selection, air emission specificationsshould be considered.

Venting will be carried out only when necessary to avoidemergency situation due to gas leakage. The durationwill be short and at controlled release rates.

The venting systems will be designed in accordancewith acceptable design safety practices with respect tovent systems.

Air intakes should be installed to ventilate facility safeareas and areas that must remain operable duringemergency situations.

Gas detection facilities shall be installed to detectdangerous gas concentrations in the air intakes toprovide for automatic shut-down in the event ofdangerous gas levels.

Noise Noise generated during the operations phase would be

mainly from the production and processing equipment onthe platforms. The main issue will be occupationalexposure to noise at close range.

Lower noise-generating production machinery andequipment should be selected where there is an option.

Selection of production machinery and equipment withbuilt-in features of noise control.

Provide mandatory hearing protection for plantoperators, where the occupational noise exposureexceeds the 8-hour TWA acceptable level of 80dB(A).

Proper warning signages at restricted areas.


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Project Activity Impact Assessment Proposed Mitigation Measures

Operation (cont) Maritime Traffic Accidents Vessel collision with the pipeline could result in, not only

serious damage to the vessels involved and loss of lives,but also adverse impacts on marine sediment quality,water quality and marine life.

Effective implementation of navigational safetymeasures.

PETRONAS Carigali-SKO will submit new pipelineslocation (with coordinates) which is marked on SARChart to the Marine Department of Sarawak

Upon completion of pipelines installation activities,finalised SAR Chart that showed the location andactual coordinates will be submitted to the MarineDepartment of Sarawak.

Health and Safety All identified incidents, as demonstrated by the QRA

assessment indicate no unacceptable risks on residentialareas, TEJ-D and TEWI. The resultant risk for fatility wasidentified to be within the tolerable region for public/involuntary personnel (during vessel collision), and foroperating staff/ voluntary personnel (in the event of fire/explosion due to leak accidents).

Potential risk of maritime accidents.

Implementation and practice of an emergency plan for thesite covering incidents related to handling, storage andprocess of hazardous materials.

Fire fighting system, safety control system, inspection andmaintenance are implemented and adhered to.

Marine spread activity should preferably be carried outduring good weather condition.

Marine Ecology The structures are conducive for providing habitat for

marine life, especially sponges, invertebrates and corals,while also attract inhabitation of crustaceans and fishes.This is a positive impact.

None


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Preliminary Environmental Impact Assessment (EIA)for Temana Redevelopment Project, Bintulu, Sarawak

6 RESIDUAL IMPACTS

Residual impact is environmental impacts that may still persist, although mitigationmeasures to minimize the impacts are fully complied with and implemented. Identifiedresidual impacts were mainly due to the physical presence of the pipeline as the pipelinemay impose impact the marine current movement, marine sediment and the benthiccommunity. However, these impacts are minimal, localized and considered insignificant.Furthermore, with the presence of the physical structures, it will create a shelter andbreeding ground for pelagic and dimersal fishes. This in the long term will increase theoffshore fish stock in the area.

7 ENVIRONMENTAL MANAGEMENT PLAN

An Environmental Management Plan (EMP) with an appropriate monitoring program will beprepared to ensure that all EIA Approval Conditions are complied with, and all regulationsand standards are being met. It is also to guide the project proponent in managing theenvironmental impacts during Project implementation.

In this chapter, an Environmental Monitoring Programme is proposed with its proposedsampling frequency, sampling points and parameters.

8 EMERGENCY RESPONSE PLAN

Temana Emergency Response Manual has been developed based on the PCSB-SKOEmergency Response Manuals to provide a basic guideline on handling any emergencyincidents or accidents that may occur during the installation and operation of the platformand pipelines.

9 CONCLUSION

Impacts during the onshore and offshore activities of the Temana Redevelopment Projecthave been found to be mainly insignificant, short-term and localized. Additionally, discharge

of off-spec water from the water injection system at TEWIM is not expected to result insignificant impact to the marine waters due to low quantities and concentration of chemicalsused during the seawater treatment process. All identified incidents, as demonstrated by theQRA assessment indicate no unacceptable risks on residential areas, TEJ-D and TEWI.With the implementation of the appropriate mitigation measures as proposed in Chapter 6 ofthis EIA Report will further minimize the potential environmental impacts from the Project.

This report shows that, with the incorporation of appropriate design, sound implementationmethods and mitigation measures, the proposed Project by PETRONAS Carigali can beimplemented in an environmental acceptable manner. The positive contribution of theproposed Project development to the nation outweighs the minimal environmental impacts.

Date post:	01-Jun-2018
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Petronas Temana project Summary

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