appendix c lng facility overview daps/pilbara jda… · these are then stripped from the amine...

Wheatstone Development Plan

APPENDIX C LNG FACILITY OVERVIEW


OVERVIEW OF PROCESSING STEPS

The key processing steps in operating the LNG plant and the associated key components of the plant are shown in

Figure 11. Further description of each of these key components is provided in the following sections.

Figure 1: Simplified Process Flow Diagram

INLET FACILITIES/STABILISER SYSTEM

The pipeline gas received from the offshore fields flows through a slug catcher and is separated into feed gas,

hydrocarbon condensate, and wastewater. The feed gas then flows to the LNG trains and Domgas plant(s). The

hydrocarbon condensate is stabilised in the condensate stabiliser, which strips off light ends to meet the

condensate vapour pressure design specifications. The stabilised liquid is then sent to one of the condensate

storage tanks.

The stripped gas is compressed and transferred to the main gas feed line of the LNG train for processing. The

wastewater is then sent to the effluent treatment unit.

ACID GAS REMOVAL UNIT

The AGRU removes acid gas components such as carbon dioxide (CO2) and hydrogen sulfide (H2S) from the feed

gas, which would otherwise freeze during the LNG liquefaction process, potentially damaging the plant and causing

plant shutdown. The AGRU system is designed to use a conventional activated methyl diethanolamine (aMDEA)

solvent. During this treatment process, CO2 and H2S that is present in the feed gas are removed in an absorber.

These are then stripped from the amine solution during the solvent regeneration process and sent to a thermal

oxidiser, while the regenerated amine is returned to the absorber via a closed loop system. Some of the benzene,

toluene, ethyl-benzene and xylene (BTEX) in the feed gas will also be absorbed by the aMDEA in the absorber. This

BTEX will be stripped out during solvent regeneration and will be sent to the thermal oxidiser along with the acid

gas.

FeedGas

Condensate

Boil Off Gas

WetGas

TreatedFeedGas

DryGas

LNGAcid Gas Removal Unit

Dehydration/MercuryRemoval

Liquefaction

NRU

Heavies Removal/Condensate RecoveryFractionation

Liquefaction (Proprietary)

LNG Storage & Loading

CondensateStorage & Loading

InletProcessing/Stabilisation

DomgasFacilities

N2 Vent

Pipeline

MEGRecovery

Lean MEG to offshore

DomgasExport Acid Gas to

ThermalOxidiser

FUTURE

DEHYDRATION AND MERCURY REMOVAL

To ensure that the final traces of water are removed from the gas stream, it is passed through a molecular sieve

dehydration system. Water from this process is recycled to the inlet facilities and AGRU and the dehydrated gas

stream progresses through activated carbon beds to remove any traces of mercury that could otherwise corrode

the aluminium heat exchangers used in the gas cooling process.

LIQUEFACTION

The treated gas then passes to the refrigeration system, where it is progressively cooled to -160°C at which point it

liquefies into LNG. This process uses a “cascade” of successive refrigerant steps to progressively cool and liquefy

the feed gas into LNG. There are three refrigerant services used: propane, ethylene and methane. As the gas

passes through these systems, it gives up heat to the successive refrigerants and cools. The cooled gas is then

flashed (allowed to expand into a separator or drum) to atmospheric pressure, cooling it further. The resulting LNG

is then pumped to the insulated LNG storage tanks and stored at atmospheric pressure and -160oC.

Nitrogen is removed from the gas stream in a nitrogen rejection unit (NRU).

HEAVY HYDROCARBON REMOVAL AND FRACTIONATION

Condensed hydrocarbon liquid from cooling of the feed gas is fractionated to remove the heavier hydrocarbon

components. This prevents freezing of hydrocarbon in the low temperature liquefaction section while satisfying

the specifications of the LNG product. These heavy components are comprised of natural gas liquids or condensate

and are blended with the condensate from the inlet facilities to produce the final condensate product.

FLARE

Wet and dry service flare systems will be provided to support start-up, shutdown, emergency and maintenance

venting requirements of the process facilities. A marine flare is provided to support the LNG marine requirements.

The flare system is likely to consist of three wet, three dry and two marine flares for the 25 MTPA case. Initially one

marine flare will be installed for the two trains of the Foundation Stage, with a second flare required when the

second loading berth is constructed on the PLF. These will be high efficiency elevated flares that have been

designed for reduced smoke and particulate emissions as well as for reduced emissions of CO, volatile organic

compounds (VOCs) and partially combusted hydrocarbons. Elevated flares reduce the possibility of thermal

radiation exposure to the workforce and facilities and assure combustion products are well dispersed.

Acid Gas Thermal Oxidiser is provided to incinerate any impurities contained in the acid gas produced from the

AGRU. An Acid Gas Thermal Oxidiser is part of each LNG train and Domgas train.

WASTE HEAT RECOVERY UNITS

Waste heat recovery units (WHRU) are expected to be installed on the refrigeration compressor gas turbines. The

WHRUs utilise the waste heat from the refrigeration compressor gas turbines exhaust streams to provide the heat

required for the LNG and Domgas process equipment. Installing WHRUs improves fuel efficiency due to the

elimination of direct fired heaters. This results in less air pollutant emissions and less greenhouse gas emissions.


The WHRUs in the first two trains use hot exhaust gas from the gas turbine drivers within the LNG train to heat a

circulating heat medium and are sized to use as much as practicable of available waste heat and to fully supply the

heat duty needed for all the heat exchangers that are normally in operation. In addition, the WHRUs are also

equipped with separate heating coils to intermittently heat the regeneration gas for the regeneration of the

molecular sieve in the Dehydration Unit.

PRODUCT STORAGE AND EXPORT

The LNG will be stored at atmospheric pressure in tanks of approximately 180 000 m3, which are insulated to

prevent the LNG from warming, rather like very large vacuum flasks. Even with insulation, a small proportion of the

LNG regasifies as Boil Off Gas (BOG). BOG is captured by a vapour recovery system, which compresses the gas and

returns it to the LNG facility. Two tanks are initially proposed to be constructed with additional tanks being added

in line with any increases in design capacity of LNG up to a maximum of four tanks.

For export, the LNG is pumped from the storage tanks to the loading arms at the LNG carrier berths and into LNG

carriers for delivery to foreign markets.

As this transfer process absorbs heat from the ambient environment, a small portion of the LNG regasifies as BOG

during the loading operation, which is captured by a vapour recovery system. To help reduce the generation of

BOG, and keep the unloading piping systems cold between ship loading operations, LNG is circulated through the

loading lines.

Condensate will also be stored at atmospheric pressure in tanks of approximately 120,000 m3 and pumped to the

condensate berth for transfer to seagoing tankers via condensate loading arms. These condensate tanks will have

floating roofs to minimise the roof cavity where excess gas can accumulate.

Initially, two condensate tanks are proposed with additional condensate tanks being added as design capacity

increases over time, up to a maximum of four condensate storage tanks.


APPENDIX D CHEMICALS SUBJECT TO CONDITION NO. 19

OF THE ANSIA STRUCTURE PLAN


APPENDIX E SOCIAL IMPACT STATEMENT

Wheatstone Project Document No: WS0-0000-HES-RPT-CVX-000-00057-000

Social Impact Statement Revision: 1

Revision Date: 13/03/2012

© Chevron Australia Pty Ltd <Public> Page 1

Printed Date: 13/3/2012 Uncontrolled when printed

SOCIAL IMPACT STATEMENT PREPARED FOR THE SHIRE OF ASHBURTON’S LOCALPLANNING POLICY 20

1 13/03/2012 Issued for Use DEQE IYUL PTGW

0 09/03/2012 Issued for Use DEQE IYUL PTGW

REV DATE DESCRIPTION ORIG CHK APPR

IP Security Public Total number of Pages (including Cover sheet): 88

ForContractorDocuments

Contract No Contractor Document NoContractor

Rev.

CompanyDocumentControl No.

Project Area Discipline Type Originator Package Sequence-Sht Revision

WS0 0000 HES RPT CVX 000 00057-000 1

Wheatstone Project

Social Impact Statement

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TABLE OF CONTENTS

GLOSSARY, ABBREVIATIONS AND ACRONYMS ............................................................. 5

1.0 WHAT IS A SOCIAL IMPACT STATEMENT? ............................................................. 8

2.0 BACKGROUND TO THE WHEATSTONE PROJECT SIS ........................................... 9

3.0 PROJECT DESCRIPTION.......................................................................................... 10

3.1 Project Objectives .............................................................................................. 13

3.2 Development Timeline ....................................................................................... 13

3.3 Environmental and Social Commitment and Responsibility ................................ 13

4.0 STAKEHOLDER CONSULTATION............................................................................ 15

4.1 Community Consultation Strategy...................................................................... 15

4.2 Community Consultation .................................................................................... 15

4.3 Consultation with Native Title Claimants ............................................................ 16

4.4 Assessment, Consultation and Communication Methods................................... 174.4.1 Community communications ................................................................ 22

4.5 Future Community Consultation......................................................................... 22

4.6 Perceived Project Issues and Impacts ............................................................... 224.6.1.1 Population Change ............................................................ 254.6.1.2 Economics and Employment.............................................. 254.6.1.3 Service Provision ............................................................... 254.6.1.4 Social Issues...................................................................... 254.6.1.5 Recreation ......................................................................... 254.6.1.6 Sense of Community.......................................................... 264.6.1.7 Environment....................................................................... 264.6.1.8 Trust and Engagement....................................................... 264.6.1.9 Health and Wellbeing ......................................................... 26

5.0 CONSTRUCTION STAGE OF DEVELOPMENT ........................................................ 28

5.1 Estimated Construction Time ............................................................................. 28

5.2 Potential Economic Impacts............................................................................... 285.2.1 Estimated Construction Expenditure .................................................... 285.2.2 Local goods sourced for construction ................................................... 285.2.3 Number of Employees/Contractors....................................................... 29

5.3 Potential Social Impacts of Construction Activities ............................................. 305.3.1 Potential Impacts on Quality of Life of Residents and Tourists ............. 30

5.3.1.1 Onshore Facilities Light Emissions..................................... 305.3.1.2 Noise Emissions ................................................................ 305.3.1.3 Air emissions ..................................................................... 325.3.1.4 Parking .............................................................................. 325.3.1.5 Access ............................................................................... 335.3.1.6 Potential Impacts on Traffic and Local Road Network ........ 335.3.1.7 Potential Impacts on Sense of Community......................... 355.3.1.8 Potential Impacts on Tourist Attractions and Places of

Recreation ......................................................................... 365.3.2 Potential Impacts on Places of Heritage Significance ........................... 38

5.3.2.1 Potential Impacts on European Cultural Heritage............... 385.3.2.2 Potential Impacts on Aboriginal Cultural Heritage .............. 41

5.4 Potential Ecological Impacts .............................................................................. 425.4.1 Potential Ecological Impacts to the Terrestrial Environment ................. 43

5.4.1.1 Soils and Landforms .......................................................... 43






5.4.1.2 Groundwater ...................................................................... 435.4.1.3 Surface Water .................................................................... 445.4.1.4 Flora and Vegetation.......................................................... 445.4.1.5 Terrestrial Fauna................................................................ 455.4.1.6 Subterranean Fauna .......................................................... 45

5.5 Local Amenity .................................................................................................... 46

5.6 Additional Infrastructure/Services Required ....................................................... 465.6.1 Drainage .............................................................................................. 465.6.2 Roads .................................................................................................. 465.6.3 Airport .................................................................................................. 465.6.4 Power Supply ....................................................................................... 475.6.5 Wastewater and Sewerage .................................................................. 475.6.6 Waste Disposal .................................................................................... 475.6.7 Water ................................................................................................... 485.6.8 Workforce Accommodation Village....................................................... 49

6.0 POTENTIAL SOCIAL IMPACTS DURING OPERATIONAL STAGE OFDEVELOPMENT......................................................................................................... 50

6.1 Potential Economic Impacts............................................................................... 506.1.1 Estimated Operations Employment ...................................................... 506.1.2 Estimated Operations Expenditure ....................................................... 506.1.3 Local goods sourced during operations................................................ 50

6.2 Potential Impacts on Quality of Life of Residents and Tourists ........................... 516.2.1 Potential Onshore Noise Emissions and Associated Impact on

Amenity................................................................................................ 516.2.2 Potential Air Emissions and Associated Impact on Amenity ................. 536.2.3 Potential Visual Impacts and Associated Impact on Amenity................ 53

6.2.3.1 Lighting impacts ................................................................. 536.2.3.2 Visual impacts.................................................................... 53

6.2.4 Potential Impacts on Sense of Community ........................................... 566.2.5 Potential Impacts of Transportation and Traffic .................................... 566.2.6 Potential Impacts on Places of Heritage Significance ........................... 57

6.2.6.1 Potential Impacts on Old Onslow Townsite ........................ 576.2.6.2 Potential Impacts on Aboriginal Cultural Heritage .............. 57

6.2.7 Potential Impacts on Tourist Attractions and Recreation Areas ............ 586.2.7.1 Disturbance to Recreational Fishing................................... 586.2.7.2 Disturbance to Other Recreational Use .............................. 59

6.3 Ecological Impacts ............................................................................................. 606.3.1 Potential Ecological Impacts to the Terrestrial Environment ................. 60

6.4 Community Services/Infrastructure Impacts ....................................................... 606.4.1 Housing, Infrastructure and Community Services................................. 60

6.4.1.1 Housing and Land Availability ............................................ 61

6.5 Infrastructure Requirements............................................................................... 62

7.0 CONCLUSION............................................................................................................ 65

8.0 REFERENCES ........................................................................................................... 66






TABLES

Table 4.1: Regional/Community Stakeholders Consulted..................................................... 15

Table 4.2: Stakeholder Consultation Methods and Approaches ........................................... 18Table 4.3: Stakeholder Consultation by Method and Approach ............................................ 21

Table 4.4: Communication Mechanisms............................................................................... 22

Table 6.1: Operating expenditure multiplier effects ($ million)*............................................. 50

Table 6.2: Scale of Change to Visual Amenity ..................................................................... 56Table 6.3: Employment/population breakdown for the Wheatstone Project .......................... 61

Table 6.4: Wheatstone Project Funding Contribution to Social Infrastructure ....................... 63

FIGURES

Figure 3.1: Location of the Wheatstone Project.................................................................... 10

Figure 3.2: Proposed Location of the Wheatstone Project Gas Processing Facilities andAssociated Infrastructure................................................................................. 12

Figure 3.3: Wheatstone Development Timeline.................................................................... 13

Figure 4.1: Perceived Community Issues/Impacts of the Wheatstone Project ...................... 24

Figure 5.1: Manning curve for the Wheatstone Development ............................................... 29Figure 5.2: Predicted Noise Contours for Pile Driving During Construction .......................... 31

Figure 5.3: Forecast Traffic Movements............................................................................... 34

Figure 5.5: Proposed Project Footprint in Relation to HCWA Conservation Area ................. 39Figure 5.6: Aboriginal Heritage Survey Extent at the ANSIA ................................................ 42

Figure 6.1: Predicted Noise Contours During Routine Operations........................................ 52

APPENDICES

A1.0 CONSTRUCTION AND OPERATIONS PHASE IMPACTS AND MANAGEMENTMEASURES SUMMARY TABLES

A2.0 SHIRE OF ASHBURTON LOCAL PLANNING SCHEME NO. 7 LOCALPLANNING POLICY

A3.0 LETTER FROM THE DEPARTMENT OF STATE DEVELOPMENT TO THESHIRE OF ASHBURTON

A4.0 LETTER FROM THE SHIRE OF ASHBURTON TO THE DEPARTMENT OFSTATE DEVELOPMENT






GLOSSARY, ABBREVIATIONS AND ACRONYMS

Term Definition

AH Act (WA) Aboriginal Heritage Act 1972 (WA)

AIP Australian Industry Participation

ANSIA Ashburton North Strategic Industrial Area

ASIA Aboriginal Social Impact Assessment

BHPBP BHP Billiton Petroleum

BTAI Burrabalayji Thalanyji Association Incorporated

CEMP Construction Environmental Management Plan

Chevron Chevron Australia Pty Ltd

CHMP Cultural Heritage Management Plan

CRG Community Reference Group

CUCA Common User Coastal Area

Dampier to Bunbury NaturalGas Pipeline/ DBNGP

The pipeline referred to in the Dampier to Bunbury Pipeline Act 1997.

DEC Western Australian Department of Environment and Conservation

DEHWA Department of Environment, Heritage, Water and the Arts

DoF Department of Fisheries

DSD Department of State Development

DSDMP Dredge Spoil and Disposal Management Plan

Domestic Gas Pipeline The pipeline to be constructed by Chevron as part of the WheatstoneProject to connect the domestic gas processing facilities of theWheatstone Project to the DBNGP.

Domgas Domestic gas plant

EIS/ERMP Environmental Impact Statement/Environmental Review andManagement Programme

ENGO Environmental Non-Government Organisation

EPA Western Australian Environmental Protection Authority

ESD Environmental Scoping Document

FEED The front end engineering and design phase of the Wheatstone Project.






Term Definition

FID Final Investment Decision

FIFO Fly-in/fly-out

Foundation Proponent Chevron as operator of the Wheatstone Foundation Project and anyother person who executes an IPDA with the State after theCommencement Date.

HCWA Heritage Council Western Australia

ICNWA Industry Capability Network Western Australia

LNG Liquefied natural gas

LPP20 Local Planning Policy No. 20

LPS 7 Local Planning Scheme No. 7

MOF Materials Offloading Facility

MMscfd million standard cubic feet

MTPA Million tonne per annum

NEPM National Environment Protection Measure

MUAIX Multi-user Access Infrastructure Corridor

NWCH North West Coastal Highway

OE Operational Excellence

OEMP Operations Environmental Management Plan

OEMS Operational Excellence Management System

PASS Potential acid sulfate soils

Product Loading Facility/ PLF A planned jetty, trestle, berth and other load-out facilities associated withthe loading of Product to the constructed within the DPA Lands byChevron as part of the Wheatstone Project.

Residual risk The level of risk remaining after the implementation of risk controlstrategies in environmental risk management.

SDA A State Development Agreement made between the State and aProponent to undertake major development within the ANSIA inaccordance with the Access Arrangements and the ANSIA StructurePlan.

SEWPaC Department of Sustainability, Environment, Water, Population andCommunities (formerly DEWHA)

SHIA Social and Health Impact Assessment






Term Definition

SHIAMP Social and Health Impact Assessment Management Plan

SIA Social Impact Assessment

SIC Shared Infrastructure Corridor

SIS Social Impact Statement

TIA Traffic Impact Assessment

TMP Traffic Management Plan

TWA Transient Workforce Accommodation

WP Wheatstone Platform

Wheatstone Project The design, development, construction and operation of facilitiesincluding LNG (that may include de-bottlenecking or the addition of LNGtrains), domestic gas facilities, offloading facilities, LNG storage tanks,infrastructure access roads, gas pipelines and product loading facilitiesin a hydrocarbon precinct within the ANSIA to be carried out by Chevronon the terms set out in this Agreement.






1.0 WHAT IS A SOCIAL IMPACT STATEMENT?

Social Impact Assessment (SIA) is the process of analysing, monitoring and managing thesocial consequences of development. A Social Impact Statement (SIS) forms part of a SIAprocess and is a beneficial tool in discovering potential issues and informing the communityin the decision making process.

Where land use proposals are subject to a requirement for community consultation, theShire of Ashburton requires the preparation of a SIS to increase the flow of information to thecommunity, Council and the proponent, and assist in resolving issues of concern. Thepreparation of a SIS provides the community with an opportunity to identify, as part of thedecision-making process, those local values that are worth protecting, the opportunities tomaximise benefits and minimise negative impacts from a decision, and provide an avenuefor benefits of local knowledge to be made available to the proponent.

The successful implementation of the SIA process recognises that social, environmental andeconomic impacts are inextricably linked. The SIA process requires consideration of likelyflow on and cumulative impacts arising from decisions made, and is an opportunity for aproponent to identify how local community values have been taken into account, andgenerally to outline the potential costs and benefits of a proposal. Importantly a SIS providesthe information necessary to inform the public about a proposed project and reduce thepotential for misunderstanding.






2.0 BACKGROUND TO THE WHEATSTONE PROJECT SIS

In November 2009, the Shire of Ashburton adopted the Local Planning Scheme No. 7 (theScheme) Local Planning Policy 20: Social Impact Assessment (Appendix A2.0). Under thispolicy, the Shire of Ashburton requires the preparation of a Social Impact Statement (SIS) forthe Chevron Wheatstone Project (the Project).This SIS has been prepared to help theOnslow community understand the potential negative and positive social impacts of theProject, and how Chevron Australia Pty Ltd (Chevron) intends to manage those impacts.This report is consistent and builds on the Ashburton North Strategic Industrial Area (ANSIA)Social Impact Statement – Part 2: Wheatstone SIS Overview and provides the followinginformation about the Project:

� Community consultation undertaken

o Community perceptions of potential issues and impacts

� Construction stage of development

o Estimated construction timeline

o Potential economic impacts

o Potential social impacts, including impacts on quality of life and places ofheritage significance

o Potential ecological impacts

o Additional infrastructure and services required.

� Operational impacts

o Potential economic impacts

o Potential impacts on quality of life of residents and tourists, including impactson traffic, public amenity, places of heritage significance and sense ofcommunity

o Potential ecological impacts

o Potential community services/infrastructure impacts

o Additional infrastructure and services required.

This SIS has been developed using data gathered for the social and environmental studiesundertaken for the Wheatstone Environmental Impact Statement / Environmental Reviewand Management Programme (EIS/ERMP). Within the EIS/ERMP, all environmental impactsand some social impacts have been assigned a risk-ranking in accordance with theEnvironmental Protection Authority’s (EPA) new risk-based approach to environmentalimpact assessment. An impact’s assessed level of risk (very low, low, medium, high orextreme) is stated in this SIS where that information is available from the EIS/ERMP. Formore detailed information on the Project’s potential social and environmental impacts,please refer to the full EIS/ERMP which is publicly available from the Chevron Australiawebsite:http://www.chevronaustralia.com/ourbusinesses/wheatstone/environmentalapprovals.aspx

The information contained in this document is consistent with the content of Part Two of theANSIA SIS.






3.0 PROJECT DESCRIPTION

Chevron, as developer of the Project, proposes to construct and operate a multi-trainLiquefied Natural Gas (LNG) and domestic gas (Domgas) plant on a greenfield site at theproposed ANSIA. The ANSIA is south-west of Onslow on the Pilbara coast in WA. TheProject will process natural gas from various offshore fields in the West Carnarvon Basin.

Petroleum Titles WA-253-P, WA-17-R, WA-16-R and WA-356-P are located approximately145 km off the north-west coast of WA in the West Carnarvon Basin, approximately 100 kmnorth of Barrow Island and 225 km north of Onslow. See Figure 3.1.

Figure 3.1: Location of the Wheatstone Project

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