executive summary - ntepa

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Sunrise Gas Project Environmental Impact Statement FINAL PAGE i Executive Summary Introduction The Sunrise Gas Project Joint Venture, operated by Woodside Energy Ltd (Woodside), proposes to develop the Greater Sunrise gas and condensate field which is located in the Timor Sea approximately 450 km north-west of Darwin and 150 km South of East Timor. Investigations indicate that the Greater Sunrise Gas Field has a ‘Scope for Recovery’ in the order of 9 trillion cubic feet of gas and 300 million barrels of condensate. Figure ES1 shows the location of the Sunrise Gas Field and surrounding gas fields. The Sunrise Gas Project is a joint venture between Woodside (Operator), Phillips STL Pty Ltd, Shell Development (Australia) Pty Ltd and Osaka Gas Australia Pty Ltd. Woodside Energy Ltd is a leading oil and gas company and one of Australia’s most successful explorers, developers, and producers of hydrocarbon products. As a participant in, and Operator of, the North West Shelf Joint Venture, Woodside is directly responsible for the management of offshore and onshore assets worth more than $9 billion. On Western Australia’s North-West Shelf, Woodside operates the North Rankin A and Goodwyn A offshore production platforms, the Cossack Pioneer Floating Production Storage and Offtake (FPSO) facility and the Onshore Gas Plant (OGP) on the Burrup Peninsula. For the Sunrise Project this document addresses the environmental issues associated with the proposed offshore facilities, potential pipelines and related plant that have the potential to cause biophysical or social effects, or which are known to be of public interest. The document has been prepared to provide the Northern Territory Government, agencies of the Commonwealth of Australia and the public with the information necessary to enable an informed appraisal of the environmental acceptability of the proposed project. Contact Details The designated operator of the Sunrise Gas Project is: Woodside Energy Ltd 1 Adelaide Terrace Perth WA 6000 Legislative Framework and Regulatory Authorities and Agencies As the Sunrise Gas Project requires assessment under both the Northern Territory and the Commonwealth environmental assessment legislation, the two government bodies have agreed to facilitate a joint assessment. As such both the Minister for the Environment (Commonwealth) and the Minister for the Environment (Northern Territory) have set the level of assessment for the project as an Environmental Impact Statement (EIS). Furthermore both governments have agreed that the Environment and Heritage Division of the Northern Territory Department of Infrastructure, Planning and Environment (DIPE) will take the lead role in the assessment process. The final guidelines issued for the project reflect the recommendations of both governments. The final documentation will be assessed by each jurisdiction, with each government making its own decision. Approximately twenty percent of the Greater Sunrise reserves lie within the Zone of Cooperation, which was initially established in 1991 under treaty between the Australian and Indonesian governments to jointly exploit petroleum resources in adjacent territorial waters and which will be continue with the newly elected government in East Timor by means of the Timor Sea Arrangement

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Sunrise Gas ProjectEnvironmental Impact Statement

FINAL PAGE i

Executive Summary

IntroductionThe Sunrise Gas Project Joint Venture, operated by Woodside Energy Ltd (Woodside), proposes todevelop the Greater Sunrise gas and condensate field which is located in the Timor Sea approximately450 km north-west of Darwin and 150 km South of East Timor. Investigations indicate that theGreater Sunrise Gas Field has a ‘Scope for Recovery’ in the order of 9 trillion cubic feet of gas and300 million barrels of condensate. Figure ES1 shows the location of the Sunrise Gas Field andsurrounding gas fields.

The Sunrise Gas Project is a joint venture between Woodside (Operator), Phillips STL Pty Ltd, ShellDevelopment (Australia) Pty Ltd and Osaka Gas Australia Pty Ltd. Woodside Energy Ltd is a leadingoil and gas company and one of Australia’s most successful explorers, developers, and producers ofhydrocarbon products. As a participant in, and Operator of, the North West Shelf Joint Venture,Woodside is directly responsible for the management of offshore and onshore assets worth more than$9 billion. On Western Australia’s North-West Shelf, Woodside operates the North Rankin A andGoodwyn A offshore production platforms, the Cossack Pioneer Floating Production Storage andOfftake (FPSO) facility and the Onshore Gas Plant (OGP) on the Burrup Peninsula.

For the Sunrise Project this document addresses the environmental issues associated with the proposedoffshore facilities, potential pipelines and related plant that have the potential to cause biophysical orsocial effects, or which are known to be of public interest. The document has been prepared toprovide the Northern Territory Government, agencies of the Commonwealth of Australia and thepublic with the information necessary to enable an informed appraisal of the environmentalacceptability of the proposed project.

Contact DetailsThe designated operator of the Sunrise Gas Project is:

Woodside Energy Ltd1 Adelaide TerracePerth WA 6000

Legislative Framework and Regulatory Authorities and AgenciesAs the Sunrise Gas Project requires assessment under both the Northern Territory and theCommonwealth environmental assessment legislation, the two government bodies have agreed tofacilitate a joint assessment. As such both the Minister for the Environment (Commonwealth) and theMinister for the Environment (Northern Territory) have set the level of assessment for the project asan Environmental Impact Statement (EIS). Furthermore both governments have agreed that theEnvironment and Heritage Division of the Northern Territory Department of Infrastructure, Planningand Environment (DIPE) will take the lead role in the assessment process. The final guidelines issuedfor the project reflect the recommendations of both governments. The final documentation will beassessed by each jurisdiction, with each government making its own decision.

Approximately twenty percent of the Greater Sunrise reserves lie within the Zone of Cooperation,which was initially established in 1991 under treaty between the Australian and Indonesiangovernments to jointly exploit petroleum resources in adjacent territorial waters and which will becontinue with the newly elected government in East Timor by means of the Timor Sea Arrangement

Sunrise Gas ProjectEnvironmental Impact Statement

PAGE ii FINAL

(TSA). However, the production facilities will be located largely within Australian waters and theNorthern Territory and Commonwealth governments will comment on the EIS within the processoutlined above.

All activities associated with the proposal will comply with the legislative requirements establishedunder a combined Territory and Commonwealth Government framework under which the Project willreceive environmental, planning and development approvals and authorisations.

Project JustificationUndeveloped reserves of gas contribute nothing to economic development and community livingstandards. For the economies and citizens of East Timor, the Northern Territory and the rest ofAustralia to benefit from the Greater Sunrise gas reserves in the Timor Sea, the fields must bedeveloped and commercial sales made to customers.

Development and production of the gas and condensate will benefit the various economies through:� The front end engineering and detailed design phases, where Australian and international

expertise will apply the latest design concepts and technologies to design world class facilities;� The construction phase when capital investments to produce, transport and process the gas are

made; and� The operations phase when gas is produced and used by customers.

The design phases will provide opportunities for skill and knowledge transfer essential to maintainingregional capability in the oil and gas sector. The construction phase will involve large expendituresconcentrated over a short period on the purchase and installation of capital equipment and constructioncosts. Local construction and service industries will have the opportunity to support the installation oflarge capital items leading to a boost in short term jobs in the construction industries and in industriessupplying inputs to construction.

Once the project enters its operations phase permanent jobs will be created in running the productionfacilities. The export of condensate and downstream products will generate income through foreignexchange. This will add to national income and the consumption prospects of the Australian and EastTimorese communities.

The extraction of natural gas will add to the Commonwealth government’s revenue directly throughthe Petroleum Resource Rent Tax levied on gas and condensate production and to the East TimorGovernment’s revenue through the Production Sharing Contract provisions of the TSA. It will alsoadd indirectly to both Northern Territory, East Timor and Commonwealth governments’ revenue byexpanding economic activity, employment, income, expenditure and hence the tax base in theNorthern Territory, the rest of Australia and East Timor. This in turn will enhance the capacities ofboth governments to support desirable social expenditures, including infrastructure development.

The development of the Greater Sunrise gas and condensate fields will secure a long-term source oftax revenue for East Timor. Furthermore, there is the potential for East Timorese involvement inlogistics and support operations to the offshore facilities. Direct employment opportunities on thefacilities will also emerge for those who acquire the necessary skills through appropriate training.

Natural gas is a fuel which produces approximately half the greenhouse gas emissions of other fossilfuel alternatives on a lifecycle basis. In this respect, the development of natural gas supply fordomestic and international markets provides tremendous opportunities for continued economicdevelopment in Australia and East Timor. To the extent that gas can be utilised in place of alternativefossil fuels, global emissions will be reduced in line with Australia’s National Greenhouse Strategy.

Sunrise Gas ProjectEnvironmental Impact Statement

FINAL PAGE iii

Project DescriptionThe Project scope includes the following major components:� Construction and operation of offshore production wells production and processing facilities, and

subsea infrastructure; and� Construction and operation of a hydrocarbon pipeline from the Sunrise facilities to the Phillips

Bayu-Undan gas export trunkline.

The Sunrise Field development will consist of either a combination of platform and subsea wells orentirely of subsea wells. Subsea wells will be linked to the production facility by intra-field pipelinesand export/import risers.

Two main wellstream processing options are under consideration:� Processing by way of processing, compression, utilities and quarters (PCUQ) facilities – the gas

would be exported to Darwin via the main export pipeline to the proposed Darwin LiquefiedNatural Gas (LNG) terminal or other potential customers (Figure ES2a); and

� Wellstream exported directly to an offshore Floating LNG (FLNG) facility via a series offlowlines and risers – the LNG and condensate would be exported from the FLNG facility toavailable markets (Figure ES2b).

The basis of the PCUQ option is a Production Jack-Up facility bridge-linked to the Wellhead Platform(WHP), both platforms being located in a water depth of 140–400 m.

This option provides for full offshore condensate separation, stabilisation and export, requiring theaddition of an Floating Storage Offloading (FSO) facility located approximately 2 km from the PCUQplatform. Condensate production will be transferred to the FSO via an 8 inch subsea flowline.Trading tankers will receive condensate from the FSO on a regular basis, and the gas will be exportedvia pipeline to Darwin.

Figure ES3 shows that the offshore production facilities are designed to deliver two products; naturalgas and condensate. There will be two process trains each having a capacity of 50%. The wellproduction from the wellhead platform and the subsea wells will be manifolded on the wellheadplatform and routed across the bridge to the PCUQ platform. All risers, subsea flowlines and exportstabilised condensate to FSO vessel will be located on the wellhead platform. The facility willproduce export gas routed to a gas pipeline, condensate product routed to FSO and produced water.

Under an OLNG scenario both the Sunrise and Bayu-Undan developments will share a section ofexport gas pipeline comprising approximately 319 km of export pipeline from a Wye piece toWickham Point for use by potential gas customers. This shared section of pipeline has already beenapproved under a separate approval process.

Production from the Greater Sunrise field will commence when suitable gas markets have beenestablished and approved by the appropriate regulatory bodies. This may be as early as mid 2006;however, this date is dependent on the establishment of suitable markets.

While it is recognised that the full field life may range from 30 to 75 years, no specific designallowance is made for extended facilities life beyond a nominal 30 years. Instead, the facilities wouldbe managed and maintained to achieve the life required.

The FLNG option provides for full processing of the wellstream on a large moored barge, includingthe provisions of utilities, support systems and quarters for both the FLNG and Sunrise Upstream

Sunrise Gas ProjectEnvironmental Impact Statement

PAGE iv FINAL

facilities, and for storage and export of both LNG and condensate. Both the Onshore LNG (OLNG)and FLNG plants fall outside the scope of approvals currently sought for the development of theGreater Sunrise gas fields and the installation of associated pipelines. FLNG and OLNG will berequired to follow separate environmental approval processes.

Alternative OptionsA broad range of alternatives have been considered by Woodside including:� The “no-development” option;� The location of the development sites and pipeline routes,� Drilling and platform facilities; and� Process technologies.

The failure to develop the Sunrise Gas Field may have adverse economic implications for Australiawhere the petroleum exploration and production industry is important to the national economy as asource of energy, employment and income. Similarly, no development would deny East Timor anopportunity to finance the rebuilding of one of the world’s newest and poorest nations. The variouseconomic benefits to both nations are outlined above.

The Sunrise Gas Project was initially a stand-alone project and therefore the early pipeline routesconsidered were based on a more direct route from Sunrise to landfall at Shoal Bay on the GunnPeninsula, north-east of Darwin. However, following the agreement to co-operatively develop TimorSea gas with Phillips (operator of the Bayu-Undan field), a number of pipeline routes were examinedthat extended from the Sunrise Gas Field to a ‘Wye’ junction with a pipeline from Bayu-Undan toWickham Point in Darwin Harbour. The pipeline from the Wye junction to Wickham Point (Darwin)is consistent with the route already approved for Bayu Undan.

Various platform drilling rig options have been investigated to minimise the impact of platformfacilities, while optimising the platform drilling capability and minimising capital investment indrilling equipment. Similarly, an assessment of three main production concepts was conducted byWoodside. The choice of the preferred offshore platform was based on geotechnical, environmentaland technical criteria.

The Sunrise Gas Project can demonstrate that the best available technologies for reduction ofenvironmental impact of discharges and emissions have been given due consideration. In this regardWoodside produced the report entitled ‘Environmental Design Review’ in May 2001. Severalavailable technologies have been considered and benefit-cost analysis performed beforerecommendations were made. Specific greenhouse gas reduction measures to be considered as part ofthe Sunrise Gas Project are:� The development and implementation of a greenhouse strategy to minimise emissions of

greenhouse gases;� Design and operational measures to minimise offshore flaring and venting;� The reduction of methane emissions to negligible levels through the combustion of regeneration

offgas;� Maximising the use of waste heat from gas turbines; and� To adopt industry best practice in greenhouse efficient technology and practice wherever

practicable.

Sunrise Gas ProjectEnvironmental Impact Statement

FINAL PAGE v

Existing EnvironmentPhysical EnvironmentThe climate of the Timor Sea comprises two distinct seasons, a dry “winter” from April to Septemberand a wet “summer” from October to March, separated by transition seasons of short duration.

The mean annual rainfall for the Sunrise Gas Field is expected to be in the order of 1,700 mm with thevast majority of the rainfall occurring between November and March. The mean summer and winterair temperatures are likely to approximately 28oC and 27oC, respectively.

Although tropical cyclones form in the area generally south of the equator in the eastern Indian Oceanand the Timor and Arafura Seas, most storms affecting the Sunrise area are tropical lows ordeveloping storms passing well to the south of the Sunrise Gas Field.

The seabed in the vicinity of the Sunrise Gas Field lies at 140 m to more than 700 m below the watersurface. The south eastern rim of the gas field lies at the top of the steep shelf break where the depthdrops to about 300 m over a distance of 15 km. There are four shallow features adjacent to thesouthern portion of the Greater Sunrise Gas Field, including the Sunrise Banks. These shoals arecovered by minimum water depths of approximately 30 to 40 m.

The preferred subsea pipeline alignment passes through water depths ranging from approximately 140m to 57 m LAT. The route is aligned to avoid shoals and valleys as much as possible.

The development area is situated on the outer shelf and upper slope of the Sahul Platform off thenorthern margin of Australia in the Timor Sea. The surficial sediments along the pipeline route varyin thickness between 0.5 and 2.5 m and range from carbonate silty to carbonate clayey sand withgravel.

The Timor Trench lies between the Sunrise Gas Field and the island of Timor. Subductionearthquakes associated with the Timor Trench dominate the earthquakes of the Sunrise Gas Projectarea. However, the design criteria of the offshore facilities provides for seismic events such asearthquakes, which are of low frequency and an intensity not likely to result in damage.

The sea wave climate at Sunrise Gas Field is closely allied to the prevailing wind regimes, withwesterly and south-westerly seas prevailing from December to March, shifting predominantly easterlyseas from April to November. Predominant swell direction at Sunrise Gas Field is from south-west towest. In summer the one year return period significant wave height is 2.4 and in winter it is 2.8 m.

Tides in the area are semidiurnal, and are expected to flow east-north-east and ebb west-south –west inthe upper 100 m of the water column, whilst flooding south-east and ebbing west-north-west in thelower portion of the water column. Maximum tidal range is about 4 m.

Surface current for the Sunrise Gas field are strongly influenced by the semidiurnal tide and to a lesserextent by the wind-driven and drift currents.

Mean monthly surface water temperatures in the vicinity of the Sunrise Gas Field are expected to varybetween about 26oC and 30oC.

Biological EnvironmentSurveys were conducted at three banks and a deep-water location in the vicinity of the Greater SunriseGas Field. The survey found that each of the three banks support extensive areas of benthic

Sunrise Gas ProjectEnvironmental Impact Statement

PAGE vi FINAL

communities considered as being both diverse and abundant. The proposed platform location (ie deepwater) is generally characterised by a relatively level substrate composed of sand and shell fragments.The area supports sparse epifauna comprised of hydroids, seapens, sea whips and solitary hard corals.

Social EnvironmentDarwin is the capital city of the Northern Territory and its proximity to major economic growth areasin the Asia Pacific region provides a stable foundation for the Territory to play a major role in thefuture of the Asia Pacific Region.

Darwin is serviced with a seaport comprising land connections to a major international airport,national highway system, the proposed national rail network and the proposed Bayu-Undan to Darwinnatural gas pipeline. Darwin is also equipped with world standard communications systems and hasemerging information technology capabilities.

East Timor’s proximity to the gas fields is expected to provide opportunity for its local economy. As alandfall, East Timor is 300 km closer to the development area than Darwin. While infrastructure andcapability constraints currently prevail, East Timor’s capabilities in the area of marine and air supportare likely to emerge within the operating life of the project.

Environmental Effects and Management StrategiesA summary of the environmental impacts related to the development of the Greater Sunrise gas andcondensate fields is provided in Table ES1, which lists:� Project component;� The source of the impact;� The potential or actual environmental impact;� The predicted effect of the impact (negligible, minor, moderate, significant or serious); and� The duration of the impact (temporary, short-term, medium-term, long-term or permanent).

In summary, the identified potential and actual environmental impacts associated with the Sunrise GasProject are:

Atmospheric emissions� Emission of smoke and particulate from production platform operations, and cargo tank emissions

from loading of FSO and shuttle tankers;

Discharges to the Sea� Smothering effects of accumulated drilling cuttings on marine biota;� Potential anoxia of sediment due to natural degradation and/or burial by drilling muds;� Localised reduction in water quality adjacent to off-shore facilities during the construction phase;� The potential discharge to the marine environment of hydrocarbons resulting from a condensate

or diesel spill, or the release of off-specification production formation water resulting in adverseimpacts on the receiving waters;

� Potential localised elevation of water temperature affecting marine organisms;� Contamination of marine environment by anti-fouling agents; and� Potential temporary localised reduction in water quality due to release of hydrotest water

containing biocides, scale and corrosion inhibitors and oxygen scavengers.

Noise, Vibration, Light and Heat� Potential disturbance to marine species due to noise and vibration created by vessels undertaking

project related activities; and

Sunrise Gas ProjectEnvironmental Impact Statement

FINAL PAGE vii

Waste to Shore� The improper disposal of waste material generated during the drilling, construction and operation

phases of the project;

Other Impacts� Temporary disruption of fisheries during construction and reduced access to fishing grounds due

to the establishment of an exclusion zone around the offshore production facilities; and along thepipeline; and

� Disturbance to benthic communities that have established on and adjacent to the facility;� Disturbance to seabed and potential changes to seabed characteristics from permanent facilities.

The result from the impact identification can be summarised as follows:� Drilling and Associated Activities: Most of the environmental effects are negligible and of short-

term or temporary duration.� Installation/Construction: Most of the environmental effects are negligible and of short-term or

temporary duration.� Commissioning/Operation: Most of the environmental effects are either negligible, minor or

moderate and of short-term duration. A few significant environmental effects have beenidentified, relating to the potential emission/spill of natural gas and condensate, the duration ofthis effect deemed long-term.

� Decommissioning: Most of the environmental effects were deemed negligible and of short-termduration.

Mitigation measures and management strategies have been recommended for implementation, basedon the APPEA’s ‘Code of Environmental Practice’, and following consultation with all relevantgovernment and non-government organisations, as well as the public. A summary of mitigationmeasures to be implemented at various stages of the projects are included in Table ES2a-b.

The management strategies proposed will ensure that all impacts on the environment will beminimised during the drilling, commissioning, operation and decommissioning phases of the proposal.An Environmental Management System will be developed and implemented by the Proponent. Themajority of the environmental management strategies for the Sunrise Gas Project will be implementedwith the following Environment Plans:

� Drilling Environment Plan: This plan would cover all aspects of drilling of the WellheadPlatform and subsea production wells and the construction and installation of the WellheadPlatform.

� Facility Environment Plan: This plan would cover all aspects of construction/installation,operation and decommissioning of the Sunrise Gas Project. The Facility EP would containspecific plans for decommissioning, waste management, and ballast water management.

In addition to the Environment Plans, project specific plans would also be implemented. Theseinclude:� Oil Spill Contingency Plan.� Emergency Response Plan.� Waste Management Plan

ConclusionsThe majority of the identified potential and actual environmental impacts associated with the SunriseGas Project are assessed as being negligible or minor in nature with temporary or short term effects.As such, this document demonstrates that the project is not expected to pose a significant

Sunrise Gas ProjectEnvironmental Impact Statement

PAGE viii FINAL

environmental threat to the East Timor Sea. Woodside is, in any case, committed to achieving a levelof environmental management and performance that is consistent with national and internationalstandards and statutory obligations during its pursuit of sound business and financial objectives. Tominimise any potential threat to the environment, the most economically effective, environmentallysound technology and procedures will be incorporated into the design of this project. The adoption ofsuch a strategy will ensure optimal management of all emissions, discharges and waste. Furthermore,Woodside is committed to ensuring that the development of the Sunrise Gas Project will beundertaken in a manner that minimises impacts on the surrounding biophysical and socialenvironments.

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n, L

ight

and

Hea

t�

Pote

ntia

l dis

turb

ance

to m

arin

e sp

ecie

s du

e to

noi

se a

nd v

ibra

tion.

Neg

ligib

leTe

mpo

rary

Was

te to

Sho

re�

Impr

oper

dis

posa

l.N

eglig

ible

Tem

pora

ry

a)

Anch

orin

g/sp

uddi

ng o

f dril

ling

unit.

b)

Cut

tings

dis

char

ge a

nd a

dher

ent d

rillin

g flu

id.

c)

Use

of w

ater

bas

ed d

rillin

g flu

ids

for t

he in

itial

sec

tion

of e

ach

wel

l or f

or v

ertic

al w

ells

.d)

U

se o

f non

-wat

er b

ased

dril

ling

fluid

s fo

r dev

iate

d se

ctio

ns o

fw

ells

.e)

Ac

tivity

of s

uppo

rt/su

pply

ves

sels

f) D

isch

arge

of d

rillin

g ch

emic

als

and

hydr

ocar

bons

atta

ched

tocu

tting

s on

ly.

g)

Dis

char

ge o

f sew

age

and

grey

wat

er.

h)

Dis

char

ge o

f dom

estic

was

te in

clud

ing

food

scr

aps.

i) O

ily w

ater

dis

char

ged

to th

e en

viro

nmen

t dur

ing

inst

alla

tion

and

oper

atio

n of

dril

ling

faci

litie

s.j)

Dis

posa

l of d

omes

tic w

aste

incl

udin

g pa

per a

nd p

last

ics

etc.

k)

Pow

er g

ener

atio

n.l)

Ligh

ting.

m)

Ref

uellin

g at

sea

.

Oth

er Im

pact

s�

Dis

turb

ance

to s

eabe

d an

d po

tent

ial c

hang

es to

sea

bed

char

acte

ristic

s fro

m d

rillin

g un

it sp

ud c

ans.

Neg

ligib

leTe

mpo

rary

Sunr

ise

Gas

Pro

ject

Envi

ronm

enta

l Im

pact

Sta

tem

ent

PAG

E x

FIN

AL

Tabl

e ES

1b S

umm

ary

of P

oten

tial E

nviro

nmen

tal I

mpa

cts

for I

nsta

llatio

n an

d C

onst

ruct

ion

Proj

ect C

ompo

nent

Sour

ce o

f Im

pact

Pote

ntia

l Env

ironm

enta

l Im

pact

Effe

ctD

urat

ion

Subs

ea F

acilit

ies

(wel

lhe

ads,

man

ifold

s,flo

wlin

es, r

iser

s, e

tc.)

Atm

osph

eric

Em

issi

ons

Gre

enho

use

gase

s pr

oduc

ed b

y ve

ssel

pow

er g

ener

atio

n (p

rimar

ilyC

O2).

Atm

osph

eric

pol

luta

nts

(prim

arily

NO

x, SO

x, VO

Cs

and

smok

e/pa

rticu

late

s);

Neg

ligib

le

Neg

ligib

le

Shor

t-ter

m

Shor

t-ter

m

Dis

char

ges

to th

e Se

a�

Pote

ntia

l sig

nific

ant f

uel s

pill.

Min

orTe

mpo

rary

Noi

se, V

ibra

tion,

Lig

ht a

nd H

eat

Pote

ntia

l dis

turb

ance

to m

arin

e or

gani

sms

and

bird

s.N

eglig

ible

Tem

pora

ry

a)

Inst

alla

tion

of s

ubse

a fa

cilit

ies.

b)

Anch

orin

g of

con

stru

ctio

n ve

ssel

(s)

c)

Dis

char

ge o

f sew

age

and

grey

wat

er.

d)

Dis

char

ge o

f dom

estic

was

te in

clud

ing

food

scr

aps.

e)

Dis

posa

l of d

omes

tic w

aste

incl

udin

g pa

per a

nd p

last

ics

etc.

f) Po

wer

gen

erat

ion.

g)

Ref

uellin

g at

sea

.

Was

te to

Sho

re�

Impr

oper

dis

posa

l.N

eglig

ible

Tem

pora

ryPC

UQ

Pla

tform

and

FSO

Atm

osph

eric

Em

issi

ons

Gre

enho

use

gase

s pr

oduc

ed b

y ve

ssel

pow

er g

ener

atio

n (p

rimar

ilyC

O2)

Atm

osph

eric

pol

luta

nts

(prim

arily

NO

x, SO

x, VO

Cs

and

smok

e/pa

rticu

late

s).

Neg

ligib

le

Neg

ligib

le

Shor

t-ter

m

Shor

t-ter

m

Dis

char

ges

to th

e Se

a�

Pote

ntia

l red

uctio

n in

wat

er q

ualit

y in

the

area

.N

eglig

ible

Shor

t-ter

mN

oise

, Vib

ratio

n, L

ight

and

Hea

t�

Pote

ntia

l dis

turb

ance

to m

arin

e sp

ecie

s.�

Pote

ntia

l attr

actio

n of

mar

ine

spec

ies.

Neg

ligib

leN

eglig

ible

Shor

t-ter

mSh

ort-t

erm

a)

Tran

spor

tatio

n of

the

PCU

Q P

latfo

rm a

nd F

SO to

site

.b)

Po

wer

gen

erat

ion.

c)

Inst

alla

tion

of th

e PC

UQ

Pla

tform

and

the

FSO

on

site

.d)

Ph

ysic

al p

rese

nce

of P

CU

Q P

latfo

rm a

nd F

SO.

e)

Inst

alla

tion

of fo

unda

tions

of t

he P

CU

Q p

latfo

rm.

f) Li

ghtin

g.g)

Pr

esen

ce o

f con

stru

ctio

n an

d su

ppor

t ves

sels

.h)

In

stal

latio

n of

moo

ring

for t

he F

SO.

Was

te to

Sho

re�

Impr

oper

dis

posa

l.N

eglig

ible

Tem

pora

rySu

bsea

Pip

elin

eAt

mos

pher

ic E

mis

sion

s�

Gre

enho

use

gase

s pr

oduc

ed b

y ve

ssel

pow

er g

ener

atio

n (p

rimar

ilyC

O2)

and

vehi

cles

Atm

osph

eric

pol

luta

nts

(prim

arily

NO

x, SO

x, VO

Cs

&sm

oke/

parti

cula

tes)

.

Neg

ligib

le

Neg

ligib

le

Shor

t-Ter

m

Shor

t-Ter

m

Dis

char

ges

to th

e Se

a�

Smot

herin

g of

ben

thos

.N

eglig

ible

Tem

pora

ryN

oise

, Vib

ratio

n, L

ight

and

Hea

t�

Pote

ntia

l dis

turb

ance

to m

arin

e sp

ecie

s.N

eglig

ible

Tem

pora

ryW

aste

to S

hore

Impr

oper

dis

posa

l.N

eglig

ible

Tem

pora

ry

a)

Pote

ntia

l pre

-sw

eep

alon

g pi

pelin

e ro

ute

b)

Prel

ay w

ith ro

ck d

ump.

c)

Layi

ng o

f pip

elin

e on

sea

bed.

d)

Hyd

rote

stin

g

Oth

er Im

pact

s�

Dis

turb

ance

due

to re

posi

tioni

ng o

f anc

hors

.�

Tem

pora

ry d

isru

ptio

n of

com

mer

cial

fish

erie

s.N

eglig

ible

Neg

ligib

leTe

mpo

rary

Tem

pora

ry

Sunr

ise

Gas

Pro

ject

Envi

ronm

enta

l Im

pact

Sta

tem

ent

FIN

ALPA

GE

xi

Tabl

e ES

1c S

umm

ary

of P

oten

tial E

nviro

nmen

tal I

mpa

cts

for C

omm

issi

onin

g an

d O

pera

tion

Proj

ect C

ompo

nent

Sour

ce o

f Im

pact

Pote

ntia

l Env

ironm

enta

l Im

pact

Effe

ctD

urat

ion

Wel

lhea

d Pl

atfo

rm,

Proc

essi

ng,

Com

pres

sion

, Util

ities

and

Qua

rters

(PC

UQ

)an

d Su

bsea

Fac

ilitie

s

Atm

osph

eric

Em

issi

ons

Sign

ifica

nt e

mis

sion

of g

reen

hous

e ga

ses

due

to e

xpor

tco

mpr

essi

on.

Sign

ifica

nt e

mis

sion

of g

reen

hous

e ga

ses

due

to p

ower

gen

erat

ion.

Sign

ifica

nt e

mis

sion

of g

reen

hous

e ga

ses

due

to fl

arin

g.�

Sign

ifica

nt e

mis

sion

of s

mok

e an

d pa

rticu

late

s.

Min

or

Min

orM

inor

Neg

ligib

le

Long

-term

Long

-term

Shor

t-ter

mLo

ng-te

rmD

isch

arge

s to

the

Sea

Pote

ntia

l sig

nific

ant h

ydro

carb

on c

onta

min

atio

n fro

m c

onde

nsat

esp

ill.�

Pote

ntia

l sig

nific

ant h

ydro

carb

on c

onta

min

atio

n fro

m d

iese

l spi

ll.�

Pote

ntia

l sig

nific

ant h

ydro

carb

on fr

om P

FW d

isch

arge

.�

Pote

ntia

l red

uctio

n in

loca

l wat

er q

ualit

y.�

Pote

ntia

l red

uctio

n in

wat

er q

ualit

y du

e to

hyd

rote

stin

g

Mod

erat

e

Min

orN

eglig

ible

Neg

ligib

leN

eglig

ible

Tem

pora

ry

Tem

pora

ryLo

ng-te

rmSh

ort-t

erm

Shor

t-ter

mN

oise

, Vib

ratio

n, L

ight

and

Hea

t�

Pote

ntia

l dis

turb

ance

to m

arin

e sp

ecie

s.N

eglig

ible

Long

-term

Was

te to

Sho

re�

Impr

oper

dis

posa

l.N

eglig

ible

Long

-term

a)

Pote

ntia

l blo

wou

t of w

ellh

ead.

b)

Hyd

rote

stin

g of

faci

litie

s.c)

Po

tent

ial r

uptu

re o

f flo

wlin

e or

rise

r.d)

Po

tent

ial d

iese

l spi

ll.e)

Po

tent

ial c

onde

nsat

e sp

ill.f)

Emer

genc

y sh

utdo

wn

of fa

cilit

y.g)

D

isch

arge

of P

rodu

ced

Form

atio

n W

ater

(PFW

).h)

D

isch

arge

of c

oolin

g w

ater

.i)

Dis

posa

l of w

aste

ass

ocia

ted

with

mai

nten

ance

of t

he p

latfo

rms.

j) D

ispo

sal o

f oily

wat

er, w

aste

oil,

etc

.k)

D

isch

arge

of s

ewag

e an

d gr

eyw

ater

.l)

Dis

posa

l of d

omes

tic w

aste

incl

udin

g fo

od s

crap

s.m

) Po

tent

ial c

ollis

ion

of s

huttl

e ta

nker

or s

uppl

y ve

ssel

s w

ithpl

atfo

rms.

n)

Ope

ratio

nal n

oise

.o)

Po

wer

gen

erat

ion

and

com

pres

sion

turb

ines

pro

duci

nggr

eenh

ouse

gas

es e

mis

sion

to a

ir.p)

H

azar

dous

mat

eria

lsO

ther

Impa

cts

Cre

atio

n of

har

d su

bstra

te th

at c

ould

be

colo

nise

d by

mar

ine

pest

spec

ies.

Rec

olon

isat

ion

of a

diff

eren

t com

mun

ity to

that

orig

inal

ly fo

und

inth

e ar

ea.

Neg

ligib

le

Min

or

Long

-term

Long

-term

FSO

and

Shu

ttle

Vess

els

Atm

osph

eric

Em

issi

ons

Car

go ta

nk e

mis

sion

s fro

m lo

adin

g of

FSO

and

shu

ttle

tank

ers.

Neg

ligib

leLo

ng-te

rmD

isch

arge

s to

the

Sea

Con

tam

inat

ion

of m

arin

e en

viro

nmen

t by

anti-

foul

ing

agen

ts.

Intro

duct

ion

of m

arin

e pe

st s

peci

es fr

om o

fftak

e ta

nker

de-

balla

stin

gan

d hu

llfou

ling.

Pote

ntia

l sig

nific

ant h

ydro

carb

on c

onta

min

atio

n fro

m c

onde

nsat

esp

ill.�

Pote

ntia

l sig

nific

ant h

ydro

carb

on c

onta

min

atio

n fro

m d

iese

l spi

ll.

Neg

ligib

leM

oder

ate

Mod

erat

e

Min

or

Long

-term

Long

-term

Tem

pora

ry

Tem

pora

ry

a)

Pote

ntia

l spi

ll du

ring

cond

ensa

te tr

ansf

er to

shu

ttle

tank

ers.

b)

Balla

st w

ater

dis

char

ge fr

om o

fftak

e ta

nker

s on

ce o

n si

te.

c)

TBT

and

othe

r ant

ifoul

ant p

aint

s on

tank

ers.

d)

Vess

el h

ulls

foul

ed w

ith e

xotic

mar

ine

orga

nism

s.e)

C

argo

tank

ven

ting

to a

tmos

pher

e.f)

Pote

ntia

l col

lisio

n w

ith s

huttl

e ta

nker

s or

sup

ply

vess

els.

g)

Pow

er g

ener

atio

n em

issi

ons.

h)

Dis

char

ge o

f sew

age

and

grey

wat

er.

i) D

ispo

sal o

f dom

estic

was

te in

clud

ing

food

scr

aps.

Oth

er Im

pact

s�

Inte

rfere

nce

with

shi

ppin

g.N

eglig

ible

Long

-term

Subs

ea P

ipel

ine

Atm

osph

eric

Em

issi

ons

Pote

ntia

l em

issi

ons

of n

atur

al g

as in

the

even

t of a

leak

.Si

gnifi

cant

Long

-term

Dis

char

ges

to th

e Se

a�

Pote

ntia

l red

uctio

n in

loca

l wat

er q

ualit

y du

e to

rele

ase

of h

ydro

test

wat

er (b

ioci

des,

cor

rosi

on in

hibi

tors

and

oxy

gen

scav

enge

rs)..

Neg

ligib

leTe

mpo

rary

a)

Pote

ntia

l rup

ture

of p

ipel

ine.

b)

Hyd

rote

stin

g of

pip

elin

e.c)

Ph

ysic

al P

rese

nce

of th

e pi

pelin

e.

Oth

er�

Phys

ical

pre

senc

e of

pip

elin

e.N

eglig

ible

Long

-term

Sunr

ise

Gas

Pro

ject

Envi

ronm

enta

l Im

pact

Sta

tem

ent

PAG

E xi

iFI

NAL

Tabl

e ES

1d S

umm

ary

of P

oten

tial E

nviro

nmen

tal I

mpa

cts

for D

ecom

mis

sion

ing

Proj

ect C

ompo

nent

Sour

ce o

f Im

pact

Pote

ntia

l Env

ironm

enta

l Im

pact

Effe

ctD

urat

ion

Dis

char

ges

to th

e Se

a�

Pote

ntia

l dis

char

ge o

f res

idua

l hyd

roca

rbon

s.N

eglig

ible

Shor

t-ter

mW

ellh

ead

Plat

form

,W

ells

and

Ass

ocia

ted

Subs

ea F

acilit

ies

Noi

se, V

ibra

tion,

Lig

ht a

nd H

eat

Dis

turb

ance

to n

oise

sen

sitiv

e m

arin

e lif

e.N

eglig

ible

Shor

t-ter

mW

aste

to S

hore

Impr

oper

dis

posa

l.N

eglig

ible

Shor

t-ter

m

a)

Plug

ging

and

aba

ndon

men

t of w

ells

.b)

R

emov

al o

f wel

l hea

d.c)

R

emov

al o

f flo

wlin

es, m

anifo

lds

and

riser

s.d)

Ve

ssel

and

rig

mov

emen

ts.

Oth

er�

Dis

rupt

ion

of b

enth

ic c

omm

uniti

es th

at h

ave

esta

blis

hed

on a

nd a

djac

ent

to th

e fa

cilit

ies.

Neg

ligib

lePe

rman

ent

PCU

Q P

latfo

rm a

ndFS

OD

isch

arge

s to

the

Sea

Pote

ntia

l hyd

roca

rbon

con

tam

inat

ion

by o

il sp

illage

.N

eglig

ible

Shor

t-ter

mN

oise

, Vib

ratio

n, L

ight

and

Hea

t�

Dis

turb

ance

to n

oise

sen

sitiv

e m

arin

e lif

e.N

eglig

ible

Shor

t-ter

mW

aste

to S

hore

Impr

oper

dis

posa

l.N

eglig

ible

Shor

t-ter

m

a)

Rem

oval

of W

ellh

ead

Plat

form

com

pone

nts

and

equi

pmen

t.b)

Ja

ckup

and

rem

oval

of t

he P

CU

Q.

c)

Dis

conn

ectio

n of

FSO

from

flow

lines

.d)

M

ovem

ent o

f FSO

offs

ite.

Oth

er�

Dis

rupt

ion

of b

enth

ic c

omm

uniti

es th

at h

ave

esta

blis

hed

on a

nd a

djac

ent

to th

e fa

cilit

y.N

eglig

ible

Perm

anen

t

Subs

ea P

ipel

ine

Dis

char

ges

to th

e Se

a�

Pote

ntia

l hyd

roca

rbon

con

tam

inat

ion

by o

il sp

illage

.N

eglig

ible

Shor

t-ter

mN

oise

, Vib

ratio

n, L

ight

and

Hea

t�

Dis

turb

ance

to n

oise

sen

sitiv

e m

arin

e lif

e an

d te

rrest

rial f

auna

.N

eglig

ible

Shor

t-ter

mW

aste

to S

hore

Dis

posa

l (ab

ando

nmen

t of s

ubse

a pi

pelin

e)�

Dis

posa

l (re

mov

al o

f sub

sea

pipe

line)

Neg

ligib

leM

oder

ate

Shor

t-ter

mPe

rman

ent

a)

Aban

donm

ent o

f sub

sea

pipe

line.

b)

Rem

oval

of s

ubse

a pi

pelin

e.c)

Po

tent

ial d

isch

arge

of r

esid

ual h

ydro

carb

ons

Oth

er�

Dis

rupt

ion

of b

enth

ic c

omm

uniti

es a

nd h

abita

ts th

at h

ave

been

esta

blis

hed

on a

nd a

djac

ent t

o th

e pi

pelin

e.N

eglig

ible

Med

ium

Ter

m

Sunr

ise

Gas

Pro

ject

Envi

ronm

enta

l Im

pact

Sta

tem

ent

FIN

ALPA

GE

xiii

Tabl

e ES

2a S

umm

ary

of M

itiga

tion

Mea

sure

s fo

r Dril

ling

and

Asso

ciat

ed A

ctiv

ities

Com

pone

ntM

itiga

tion

Mea

sure

sD

rillin

g R

ig�

Ensu

re th

e dr

illing

rig

has

adeq

uate

saf

ety

syst

ems

such

as

blow

out p

reve

nter

s, a

larm

s an

d au

tom

ated

shu

tdow

n de

vice

s w

hich

mee

t reg

ulat

ory

and

indu

stry

sta

ndar

dsan

d fo

r whi

ch a

dequ

ate

mai

nten

ance

and

test

ing

prog

ram

s ar

e in

pla

ce;

Ensu

re th

e dr

illing

rig

has

safe

ope

ratin

g pr

oced

ures

in p

lace

whi

ch m

eet r

egul

ator

y an

d in

dust

ry s

tand

ards

incl

udin

g ch

emic

als

and

was

te m

anag

emen

t asp

ects

, etc

;�

Ensu

re th

e dr

illing

rig

has

effic

ient

sol

ids

cont

rol a

nd m

ud c

ircul

atio

n sy

stem

s w

hich

max

imis

e re

cycl

ing

of d

rillin

g flu

ids;

Ensu

re th

e dr

illing

rig

has

adeq

uate

com

min

utio

n, c

onta

inm

ent,

drai

nage

and

mon

itorin

g sy

stem

s to

pre

vent

ove

rboa

rd d

isch

arge

s of

unp

erm

itted

effl

uent

s (e

.g. o

il, o

rch

emic

al c

onta

min

ated

effl

uent

s, w

hole

food

scr

aps

and

sew

age,

etc

.D

rillin

g Fl

uids

Whe

re p

ract

icab

le a

nd p

ossi

ble

low

toxi

city

wat

er-b

ased

dril

ling

fluid

form

ulat

ions

will

be u

sed;

Whe

re re

quire

d lu

bric

ity o

r oth

er fl

uid

prop

ertie

s ca

nnot

be

achi

eved

usi

ng a

wat

er-b

ased

dril

ling

fluid

, a s

ynth

etic

flui

d w

hich

is o

f pro

ven

low

toxi

city

will

be u

sed.

Cre

w In

duct

ion

Reg

ulat

ory

requ

irem

ents

for d

rillin

g op

erat

ions

.�

Envi

ronm

enta

l con

side

ratio

ns a

nd s

peci

al p

roce

dure

s to

be

used

for e

nviro

nmen

t pro

tect

ion

in th

e pe

rmit

area

.�

Safe

ty p

roce

dure

s w

ith p

artic

ular

rega

rd fo

r app

ropr

iate

con

duct

on

vess

els

and

safe

use

of e

quip

men

t.W

ildlif

e Pr

otec

tion

Spot

ting

repo

rts o

f end

ange

red

spec

ies

Spec

ifyin

g ro

utes

and

/or o

pera

ting

proc

edur

es fo

r sup

ply

vess

els

and

helic

opte

rs, w

hich

min

imis

e im

pact

on

wild

life

Spills

Pre

vent

ion

Safe

ty s

yste

ms

incl

udin

g bl

owou

t pre

vent

ers.

Con

tain

ed o

il an

d ch

emic

al, p

acka

ging

and

sto

rage

are

as.

Con

tain

men

t aro

und

oil a

nd c

hem

ical

use

are

as a

nd e

quip

men

t suc

h as

the

pipe

dec

k, m

ud ta

nks,

pum

ps e

tc.

Effic

ient

oil/

wat

er s

epar

ator

s in

bilg

es (a

nd b

alla

st ta

nks

whe

re n

ot s

egre

gate

d fro

m c

onta

inm

ent s

ourc

es).

Safe

fuel

tran

sfer

pro

cedu

res

from

sup

ply

vess

el to

dril

ling

rig e

g ch

ecki

ng p

rodu

ct tr

ansf

er h

oses

for l

eaks

, mon

itorin

g ta

nk le

vels

etc

.C

hem

ical

s an

dH

azar

dous

Mat

eria

ls�

Prov

isio

n of

Mat

eria

l Saf

ety

Dat

a Sh

eets

and

han

dlin

g pr

oced

ures

for h

azar

dous

che

mic

als

and

mat

eria

ls.

Prov

isio

n of

app

ropr

iate

abs

orbe

nt m

ater

ial a

nd s

pill

clea

n-up

equ

ipm

ent.

Use

of l

ow im

pact

che

mic

als

and

mat

eria

ls a

s fa

r as

prac

ticab

le.

Emer

genc

y R

espo

nse

Oil

and

chem

ical

spi

lls.

Fire

pre

vent

ion

Die

sel o

r bun

ker f

uel s

pill.

Was

te M

anag

emen

tA

proj

ect-s

peci

fic w

aste

man

agem

ent p

lan

will

be a

dopt

ed to

add

ress

:�

Dis

char

ges

to S

ea�

Solid

and

Haz

ardo

us W

aste

The

rele

ase

of c

onta

min

ants

to th

e se

a fro

m d

eck

was

h w

ill be

min

imis

ed b

y en

surin

g th

e fo

llow

ing:

Abso

rben

ts a

nd c

onta

iner

s ar

e av

aila

ble

in th

e rig

to c

lean

up

smal

l acc

umul

atio

ns o

f oil

and

grea

se a

roun

d w

ork

area

s an

d de

cks.

Accu

mul

atio

ns o

f oil,

gre

ase

and

othe

r con

tam

inan

ts a

re c

olle

cted

and

rem

oved

from

the

deck

prio

r to

ever

y w

ashd

own.

Oil-

cont

amin

ated

dec

k dr

aina

ge is

div

erte

d to

a s

ettli

ng ta

nk to

allo

w s

epar

atio

n of

oil

from

wat

erD

isch

arge

s to

Sea

No

was

te w

ill be

dis

pose

d ov

erbo

ard

exce

pt fo

r (a)

com

min

uted

sew

age

and

food

was

tes,

(b) d

rillin

g cu

tting

s an

d ad

here

nt w

ater

-bas

ed d

rillin

g flu

ids,

(c) e

xces

s w

ater

-ba

sed

drilli

ng fl

uids

at t

he c

ompl

etio

n of

a w

ell o

r if d

iffer

ent p

rope

rties

app

ly a

nd (d

) unc

onta

min

ated

(in

as m

uch

as is

pra

ctic

able

) dec

k w

ashd

own

was

tes.

The

tota

l vol

ume

of d

isch

arge

s w

ill be

min

imis

ed a

nd re

circ

ulat

ion

of d

rillin

g flu

ids

optim

ised

.�

Dril

l cut

tings

and

flui

d di

scha

rges

will

be a

naly

sed

to a

void

oil

cont

amin

atio

n.�

Dis

char

ges

from

ess

entia

l ope

ratio

ns s

uch

as g

rout

ing

of th

e co

nduc

tor a

nd s

urfa

ce c

asin

g st

rings

for e

g ce

men

t mix

ture

circ

ulat

ion

to s

eabe

d, s

urpl

us c

emen

t flu

id e

tc.

To a

chie

ve o

ptim

al d

ispe

rsal

sta

ge d

isch

arge

s w

ill be

impl

emen

ted

eg d

ispo

sal o

f exc

ess

fluid

at t

he e

nd o

f wel

l.�

Whe

re s

mal

l am

ount

s of

oil

addi

tives

are

add

ed to

dril

ling

fluid

on

a on

e-of

f bas

is, c

onsu

ltatio

n w

ill ta

ke p

lace

with

the

Des

igna

ted

Auth

ority

on

the

disp

osal

met

hod

–di

spos

al to

sea

may

be

cons

ider

ed if

con

cent

ratio

ns a

re lo

w, t

he s

ite e

nviro

nmen

t is

suita

ble

and

or a

dditi

onal

trea

tmen

t (oi

l sep

arat

ion)

is u

nder

take

n.Ai

r Em

issi

ons

and

Ener

gy U

se�

Min

imis

e em

issi

ons

from

fire

d m

achi

nery

and

opt

imis

e fu

el u

se e

ffici

ency

.�

Min

imis

e fla

ring

and

emis

sion

s fro

m p

rodu

ctio

n te

sts.

Opt

imis

e fla

re b

urne

r cha

ract

eris

tics

to e

nsur

e m

axim

um b

urni

ng o

f all

hydr

ocar

bons

pro

duce

d du

ring

prod

uctio

n te

st.

Sunr

ise

Gas

Pro

ject

Envi

ronm

enta

l Im

pact

Sta

tem

ent

PAG

E xi

vFI

NAL

Com

pone

ntM

itiga

tion

Mea

sure

sSo

lid a

nd H

azar

dous

Was

te�

Segr

egat

e w

aste

as

muc

h as

pos

sibl

e an

d en

sure

saf

e st

orag

e an

d la

bellin

g of

mai

nten

ance

, che

mic

al p

acka

ging

, bat

terie

s, w

aste

lube

oils

and

oth

er in

dust

rial w

aste

for

retu

rn to

sho

re, r

ecyc

ling

and

or tr

eatm

ent a

nd d

ispo

sal i

n an

app

rove

d m

anne

r.�

Col

lect

ion

of a

ll so

lid d

omes

tic w

aste

for r

etur

n to

sho

re a

nd a

ppro

ved

disp

osal

.

Phys

ical

Pre

senc

e of

Rig

Adva

nce

notif

icat

ion

of th

e pr

esen

ce o

f the

rig

to lo

cal f

ishe

rmen

and

oth

er re

leva

nt p

artie

s.�

Ensu

re ra

dio

wat

ch o

n sh

ippi

ng tr

affic

and

fish

ing

vess

els.

Not

ifica

tion

of th

e Au

stra

lian

Mar

itim

e Sa

fety

Aut

horit

y of

the

rig lo

catio

n an

d an

chor

dis

tanc

es.

Adeq

uate

ligh

ting

of th

e rig

.

Tabl

e ES

2b S

umm

ary

of M

itiga

tion

Mea

sure

s du

ring

Inst

alla

tion

and

Con

stru

ctio

n C

ompo

nent

Miti

gatio

n M

easu

res

Gen

eral

Mea

sure

sIn

stal

latio

n of

the

plat

form

s w

ill oc

cur o

ver a

ver

y sh

ort p

erio

d of

tim

e th

ereb

y m

inim

isin

g an

y im

pact

s on

the

surro

undi

ng e

nviro

nmen

t. M

itiga

tion

mea

sure

s w

ill fo

cus

onis

sues

suc

h as

was

te m

anag

emen

t, ai

r and

noi

se e

mis

sion

s an

d re

stric

tion

of th

e de

velo

pmen

t to

the

defin

ed p

roje

ct a

rea

Cha

rts o

f the

rout

e an

d no

tific

atio

n w

ill be

giv

en to

mar

ine

user

s pr

ior t

o co

nstru

ctio

n/in

stal

latio

n.�

Nav

igat

ion

and

safe

ty li

ghtin

g w

ill be

pro

vide

d to

ens

ure

that

any

shi

ppin

g or

recr

eatio

nal a

ctiv

ities

are

abl

e to

cle

arly

iden

tify

the

pres

ence

of a

ctiv

ity.

Woo

dsid

e w

ill co

nfin

e ac

tiviti

es to

the

min

imum

dev

elop

men

t are

a re

quire

d to

min

imis

e th

e ar

ea im

pact

ed.

Wor

k ar

eas

will

be k

ept t

o a

min

imum

with

pip

elin

e la

ying

rest

ricte

d to

at m

ost a

10

km w

idth

cor

ridor

. W

ithin

this

cor

ridor

pip

e la

ying

ope

ratio

ns w

ill oc

cur w

ith a

1 k

mco

rrido

r in

as m

uch

as is

pos

sibl

e. A

ny p

re-la

y ro

ck a

rmou

r tha

t may

be

requ

ired

will

be c

onfin

ed to

a m

uch

smal

ler a

rea

usua

lly 1

0 m

in w

idth

.�

Woo

dsid

e w

ill en

deav

our t

o m

inim

ise

all d

istu

rban

ce to

mar

ine

life

and

fishe

ries.

How

ever

, as

no b

reed

ing

area

s ar

e af

fect

ed b

y th

e de

velo

pmen

t im

pact

s w

ill be

kep

t to

a m

inim

um.

Min

imis

e al

l air

emis

sion

s an

d di

scha

rges

. Ef

ficie

nt p

lann

ing

of v

ehic

le a

nd v

esse

l mov

emen

ts w

ill m

inim

ise

fuel

usa

ge.

All w

aste

will

be m

anag

ed in

acc

orda

nce

with

a p

roje

ct–s

peci

fic w

aste

man

agem

ent p

lan

and

in a

ccor

danc

e w

ith c

urre

nt w

aste

legi

slat

ion.

Any

rock

dum

ping

alo

ng th

e pi

pelin

e ro

ute

will

be k

ept t

o a

min

imum

.Su

ppor

t Ves

sels

All m

arin

e su

ppor

t act

iviti

es m

ust c

ompl

y w

ith m

ariti

me

law

s an

d im

plem

ent g

ood

envi

ronm

enta

l wor

king

sta

ndar

ds.

Thes

e w

ill in

clud

e th

e fo

llow

ing:

All s

uppo

rt se

rvic

es a

re c

ondu

cted

in a

ccor

danc

e w

ith re

leva

nt le

gisl

atio

n an

d th

e op

erat

ing

com

pani

es re

quire

men

ts.

Ref

uellin

g an

d si

mila

r ope

ratio

ns w

ill be

con

duct

ed in

acc

orda

nce

with

por

t aut

horit

y re

quire

men

ts a

nd a

ll ho

ses,

fitti

ngs

and

fail-

safe

dev

ices

will

be fu

lly o

pera

tiona

l.�

Effic

ient

oil/

wat

er s

epar

atio

n in

bilg

es a

nd d

ispo

sal o

f cle

an b

ilge

wat

er in

offs

hore

are

as, w

here

per

mitt

ed.

Sunr

ise

Gas

Pro

ject

Envi

ronm

enta

l Im

pact

Sta

tem

ent

FIN

ALPA

GE

xv

Tabl

e ES

2c S

umm

ary

of M

itiga

tion

Mea

sure

s fo

r Com

mis

sion

ing,

Ope

ratio

n &

Dec

omm

issi

onin

gC

ompo

nent

Miti

gatio

n M

easu

res

Com

mis

sion

ing

Con

side

ratio

n w

ill be

giv

en to

con

trollin

g an

d m

inim

isin

g w

here

pos

sibl

e th

e us

e of

bio

cide

s an

d to

xic

chem

ical

s co

ntai

ned

with

in th

e hy

drot

est w

ater

. Th

e ch

emic

als

used

inth

e pr

essu

re te

stin

g w

ill be

car

eful

ly s

elec

ted

with

rega

rd to

toxi

city

.G

ener

al O

pera

tion

and

Mai

nten

ance

proc

edur

es

Any

area

s of

spi

llage

and

leak

age

will

be p

rom

ptly

repo

rted

and

nece

ssar

y m

aint

enan

ce w

orks

and

con

trol m

easu

res

unde

rtake

n im

med

iate

ly.

All m

onito

ring

devi

ces

and

alar

ms

will

be o

pera

tive.

Adeq

uate

pro

cess

sur

veilla

nce

will

be u

nder

take

n.�

Pers

onne

l will

be a

dequ

atel

y in

form

ed o

f pro

cedu

res.

Oil

Spill

Prev

entio

n.�

Nav

igat

ion

and

safe

ty li

ghtin

g w

ill be

pro

vide

d to

ens

ure

that

any

shi

ppin

g or

recr

eatio

nal a

ctiv

ities

are

abl

e to

cle

arly

iden

tify

the

pres

ence

of a

ctiv

itySp

ills�

Hos

es fo

r die

sel/

oil/

chem

ical

tran

sfer

to b

e fit

ted

with

hig

h re

liabi

lity

brea

kaw

ay s

elf-s

ealin

g co

uplin

gs.

Moo

ring

haw

ser t

o be

fitte

d w

ith q

uick

rele

ase

hook

and

load

mon

itorin

g ce

ll.�

Con

side

r des

igni

ng a

ll flo

wlin

es fo

r 1 in

10,

000

year

sto

rms

- pro

vide

d w

ith s

hutd

own

valv

es a

nd H

P/LP

sen

sors

.�

Spill

kits

ava

ilabl

e fo

r cle

an-u

p of

min

or s

pills

.�

Faci

litie

s fo

r dis

posa

l of t

anke

r cle

anin

g pr

oduc

ts d

urin

g op

erat

ion

and

deco

mm

issi

onin

g sh

ould

be

cons

ider

ed in

des

ign.

Proc

ess

spill

and

leak

det

ectio

n, a

larm

, shu

tdow

n an

d is

olat

ion

devi

ces

will

be m

aint

aine

d in

goo

d op

erat

ing

cond

ition

s.�

Effic

ient

con

tain

men

t and

sep

arat

ion

of c

onta

min

ated

run-

off d

ecks

, mac

hine

ry a

reas

and

oil/

chem

ical

sto

rage

are

as.

An O

il Sp

ill C

ontin

genc

y Pl

an (O

SCP)

has

bee

n pr

epar

ed b

y W

oods

ide

for t

he T

imor

Sea

. If

nece

ssar

y th

is O

SCP

will

be a

men

ded

to m

eet t

he s

peci

fic re

quire

men

ts o

fth

e fie

ld d

evel

opm

ent.

Emer

genc

y R

espo

nse

Woo

dsid

e w

ill en

sure

that

the

ERP

are

test

ed a

nd re

view

ed a

t reg

ular

inte

rval

s an

d th

e op

erat

iona

l per

sonn

el a

re a

ppro

pria

tely

info

rmed

of e

mer

genc

y pr

oced

ures

and

trai

ned

to e

ffect

ivel

y im

plem

ent t

hem

.H

ydro

carb

on L

oadi

ng�

All r

egul

ator

y re

quire

men

ts w

ill be

obs

erve

d in

clud

ing

stan

dard

s fo

r des

ign

and

appl

icat

ion

of h

ardw

are

eg fl

ange

s, v

alve

s, c

oupl

ings

, fitt

ings

etc

Mar

ine

oper

atin

g pr

oced

ures

def

ine

acce

ptab

le o

cean

con

ditio

ns fo

r the

tank

er to

be

conn

ecte

d to

the

trans

fer h

ose

and

for t

he e

xpor

t of c

onde

nsat

e to

take

pla

ce�

The

trans

fer h

ose

will

be fl

ushe

d w

ith s

eaw

ater

in th

e ta

nker

prio

r to

disc

onne

ctin

g in

the

even

t of r

ough

wea

ther

Pres

sure

sen

sors

will

be in

stal

led

to d

etec

t and

trig

ger a

larm

s fo

r sto

ppin

g th

e tra

nsfe

r of c

onde

nsat

e to

the

tank

er in

the

even

t of a

hig

h or

low

pre

ssur

e tri

p.�

Flow

lines

and

hos

es a

re c

ertif

ied

and

test

ed p

rior t

o us

e.�

Dry

bre

ak c

oupl

ings

will

be fi

tted

to h

oses

.�

All f

ittin

gs a

nd h

oses

will

be ro

utin

ely

insp

ecte

d an

d m

aint

aine

d.�

All s

pilla

ges,

leak

s or

poi

nts

of e

xces

sive

wea

r will

be p

rope

rly re

porte

d an

d th

e ne

cess

ary

mai

nten

ance

wor

k an

d co

ntro

l mea

sure

s un

derta

ken

with

out d

elay

.�

All m

onito

ring

devi

ces

and

alar

m s

yste

ms

will

be fu

lly o

pera

tive

Che

mic

als

and

Haz

ardo

us M

ater

ials

Man

agem

ent

Hyd

rate

Inhi

bito

r Che

mic

al U

se�

Self-

Equa

lisin

g Su

bsea

Shu

tdow

n Va

lve

(SSS

Vs)

Scal

e In

hibi

tor I

njec

tion

Min

imis

e ne

ed to

dos

e de

mul

sifie

r/ant

i-foa

m a

gent

in s

epar

ator

Min

imis

e ne

ed to

dos

e an

ti-fo

amin

g ag

ent i

n de

hydr

atio

n an

d st

abilis

er�

Min

imis

e en

viro

nmen

tal i

mpa

ct o

f bio

cide

, cor

rosi

on in

hibi

tor,

chem

ical

sca

veng

er a

nd d

ye u

se in

hyd

rote

st w

ater

Min

imis

e en

viro

nmen

tal i

mpa

ct o

f rel

ease

of h

ydra

ulic

flui

d fro

m s

ubse

a co

ntro

l sys

tem

s.W

aste

Man

agem

ent

A pr

ojec

t-spe

cific

was

te m

anag

emen

t pla

n w

ill be

ado

pted

to a

ddre

ss:

Was

te w

ill be

labe

lled

appr

opria

tely

for r

etur

n to

sho

re w

here

dis

posa

l at l

andf

ill, o

r if p

ossi

ble

reus

e, re

cycl

ing

or re

cove

ry w

ill ta

ke p

lace

.�

Dis

char

ges

to S

ea�

Solid

and

Haz

ardo

us W

aste

As m

uch

as p

ossi

ble

was

te w

ill be

seg

rega

ted

into

dis

tinct

was

te s

tream

s eg

pac

kagi

ng, c

hem

ical

s, in

dust

rial w

aste

, bat

terie

s et

c an

d st

ored

in a

ppro

pria

te lo

catio

ns.

Was

te w

ill be

labe

lled

appr

opria

tely

for r

etur

n to

sho

re w

here

dis

posa

l at l

andf

ill, o

r if p

ossi

ble

reus

e, re

cycl

ing

or re

cove

ry w

ill ta

ke p

lace

.�

Solid

dom

estic

was

te w

ill be

retu

rned

to s

hore

and

dis

pose

d at

an

appr

oved

land

fill.

Sunr

ise

Gas

Pro

ject

Envi

ronm

enta

l Im

pact

Sta

tem

ent

PAG

E xv

iFI

NAL

Com

pone

ntM

itiga

tion

Mea

sure

sD

isch

arge

s to

Sea

Dis

char

ges

will

mee

t oil

–in-

wat

er s

tand

ards

Trea

tmen

t fac

ilitie

s to

be

of s

uffic

ient

des

ign

capa

city

to h

andl

e PF

W, a

nd o

ther

oily

wat

ers

from

dirt

y w

ork

area

s (d

eck

area

dra

inag

e, m

achi

nery

spa

ce d

rain

age

etc

The

efflu

ent d

isch

arge

s fro

m tr

eatm

ent f

acilit

ies

will

be m

onito

red

by a

ppro

pria

te te

chni

ques

prio

r to

disc

harg

e, a

nd m

onito

ring

equi

pmen

t will

unde

rgo

perio

dic

chec

king

in a

ccor

danc

e w

ith s

tatu

tory

requ

irem

ents

Coo

ling

wat

er re

leas

es w

ill be

con

trolle

d to

avo

id th

erm

al e

ffect

s�

As a

min

imum

sew

age

and

food

scr

aps

will

be c

omm

inut

ed p

rior t

o di

scha

rge

in o

ffsho

re w

ater

s an

d in

acc

orda

nce

with

P(S

L)A

requ

irem

ents

.Ai

r Em

issi

ons/

Ener

gyU

se�

Flar

ing

will

be m

inim

ised

.�

Fugi

tive

emis

sion

from

pro

cess

equ

ipm

ent w

ill be

min

imis

ed�

Emis

sion

s fro

m fi

red

mac

hine

ry w

ill be

min

imis

ed a

nd fu

el u

se o

ptim

ised

Noi

se, V

ibra

tion,

Lig

htan

d H

eat

Woo

dsid

e w

ill at

tain

occ

upat

iona

l hea

lth s

tand

ards

for

nois

e em

issi

ons

by in

stal

ling

sile

ncer

s, c

ladd

ing

and

othe

r ap

prop

riate

noi

se a

ttenu

atio

n co

ntro

ls w

here

pra

ctic

able

.D

ue to

the

dist

ance

of t

he fa

cilit

y of

fsho

re n

oise

will

not b

e a

maj

or is

sue.

Met

hods

for m

inim

isin

g no

ise,

vib

ratio

n, li

ght a

nd h

eat i

mpa

cts

are

also

incl

uded

.M

arin

e Su

ppor

tVe

ssel

sAl

l mar

ine

supp

ort a

ctiv

ities

mus

t com

ply

with

mar

itim

e la

ws

and

impl

emen

t goo

d en

viro

nmen

tal w

orki

ng s

tand

ards

. Th

ese

will

incl

ude

the

follo

win

g:�

Goo

ds a

nd m

ater

ials

are

pro

perly

pac

kage

, lab

elle

d fo

r tra

nspo

rtatio

n an

d tra

nsfe

r.�

Ref

uellin

g an

d si

mila

r ope

ratio

ns w

ill be

con

duct

ed in

acc

orda

nce

with

por

t aut

horit

y re

quire

men

ts a

nd a

ll ho

ses,

fitti

ngs

and

fail-

safe

dev

ices

will

be fu

lly o

pera

tiona

l.�

Effic

ient

oil/

wat

er s

epar

atio

n in

bilg

es a

nd d

ispo

sal o

f cle

an b

ilge

wat

er in

offs

hore

are

as, w

here

per

mitt

ed.

Com

min

utio

n of

sew

age

and

food

was

te a

nd d

ispo

sal i

n of

fsho

re a

reas

onl

y w

here

per

mitt

ed a

nd c

onta

inm

ent o

f sew

age

and

food

was

tes

for o

nsho

re d

ispo

sal w

hen

inne

arsh

ore

wat

ers.

Phys

ical

Pre

senc

eA

500

m s

afet

y ex

clus

ion

zone

will

be m

aint

aine

d ar

ound

the

faci

lity

and

no v

esse

ls a

re a

llow

ed to

ent

er o

r anc

hor w

ithin

the

zone

with

out t

he p

erm

issi

on. T

o re

duce

the

risk

of c

ollis

ion

with

ves

sels

usi

ng th

e ar

ea, f

ishe

ries

and

ship

ping

are

mad

e aw

are

of th

e pr

esen

ce o

f fac

ility,

flow

lines

and

500

m e

xclu

sion

zon

e. T

he fa

cilit

y is

mar

ked

on th

eAu

stra

lian

navi

gatio

nal c

harts

. N

otic

es is

sued

to s

hipp

ing

and

appr

opria

te n

avig

atio

n m

arke

r lig

hts

are

disp

laye

d.D

ecom

mis

sion

ing

A de

com

mis

sion

ing

plan

will

be d

evel

oped

by

Woo

dsid

e in

acc

orda

nce

with

the

guid

elin

es c

urre

ntly

bei

ng d

raw

n up

by

the

DBI

RD

. Th

is p

lan

will

take

into

acc

ount

the

conc

erns

and

vie

ws

of o

ther

mar

ine

user

s as

wel

l as

the

curre

nt a

nd fu

ture

val

ues

of th

e ar

ea.

The

disp

osal

or r

euse

/recy

clin

g of

stru

ctur

es a

nd e

quip

men

t and

the

safe

deco

mm

issi

onin

g of

wel

ls w

ill al

so b

e co

nsid

ered

.