# Appendix F Air Quality ReviewEXPLORATION PLAN (EP)

AIR QUALITY SCREENING CHECKLIST
COMPANY Woodside Energy

AREA WR

BLOCK 325

LEASE 32673

PLATFORM

WELL A-D

COMPANY CONTACT Debra K. Benoit

TELEPHONE NO. 713-401-0083

REMARKS debra.benoit@WoodsideEnergy.comEMISSIONS CALCULATIONS 1ST YEAR

COMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKS

Woodside Energy WR 325 32673 A-D Debra K. Benoit 713-401-0083

OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONS Diesel Engines HP GAL/HR GAL/D Nat. Gas Engines HP SCF/HR SCF/D

Burners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CO

DRILLING PRIME MOVER>600hp diesel 61200 2955.96 70943.04 24 151 43.14 197.89 1482.82 44.48 323.52 78.16 358.57 2686.87 80.61 586.23 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 AUXILIARY EQUIP<600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 1800 86.94 2086.56 8 129 1.27 5.82 43.61 1.31 9.52 0.66 3.01 22.58 0.68 4.93 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.57 2.64 19.76 0.59 4.31 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.57 2.64 19.76 0.59 4.31 No Tugs Required VESSELS>600hp diesel(tugs-2) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

FACILITY DERRICK BARGE diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

INSTALLATION MATERIAL TUG diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(supply) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

MISC. BPD SCF/HR COUNT

TANK- 0 0 0 0.00 0.00

DRILLING OIL BURN 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

WELL TEST GAS FLARE 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2013 YEAR TOTAL 47.37 217.29 1628.19 48.85 355.24 79.97 366.86 2748.96 82.47 599.77

EXEMPTION

CALCULATION DISTANCE FROM LAND IN

MILES 5494.50 5494.50 5494.50 5494.50 102282.55

165.0COMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKS

Woodside Energy WR 325 32673 A-D Debra K. Benoit 713-401-0083

OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONS Diesel Engines HP GAL/HR GAL/D Nat. Gas Engines HP SCF/HR SCF/D

Burners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CO

DRILLING PRIME MOVER>600hp diesel 61200 2955.96 70943.04 24 151 43.14 197.89 1482.82 44.48 323.52 78.16 358.57 2686.87 80.61 586.23 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 AUXILIARY EQUIP<600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 1800 86.94 2086.56 8 129 1.27 5.82 43.61 1.31 9.52 0.66 3.01 22.58 0.68 4.93 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.57 2.64 19.76 0.59 4.31 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.57 2.64 19.76 0.59 4.31 No Tugs Required VESSELS>600hp diesel(tugs-2) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

FACILITY DERRICK BARGE diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

INSTALLATION MATERIAL TUG diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(supply) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

MISC. BPD SCF/HR COUNT

TANK- 0 0 0 0.00 0.00

DRILLING OIL BURN 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

WELL TEST GAS FLARE 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2014 YEAR TOTAL 47.37 217.29 1628.19 48.85 355.24 79.97 366.86 2748.96 82.47 599.77

EXEMPTION

CALCULATION DISTANCE FROM LAND IN

MILES 5494.50 5494.50 5494.50 5494.50 102282.55

165.0COMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKS

Woodside Energy WR 325 32673 A-D Debra K. Benoit 713-401-0083

OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONS Diesel Engines HP GAL/HR GAL/D Nat. Gas Engines HP SCF/HR SCF/D

Burners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CO

DRILLING PRIME MOVER>600hp diesel 61200 2955.96 70943.04 24 151 43.14 197.89 1482.82 44.48 323.52 78.16 358.57 2686.87 80.61 586.23 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 AUXILIARY EQUIP<600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 1800 86.94 2086.56 8 129 1.27 5.82 43.61 1.31 9.52 0.66 3.01 22.58 0.68 4.93 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.57 2.64 19.76 0.59 4.31 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.57 2.64 19.76 0.59 4.31 No Tugs Required VESSELS>600hp diesel(tugs-2) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

FACILITY DERRICK BARGE diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

INSTALLATION MATERIAL TUG diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(supply) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

MISC. BPD SCF/HR COUNT

TANK- 0 0 0 0.00 0.00

DRILLING OIL BURN 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

WELL TEST GAS FLARE 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2015 YEAR TOTAL 47.37 217.29 1628.19 48.85 355.24 79.97 366.86 2748.96 82.47 599.77

EXEMPTION

CALCULATION DISTANCE FROM LAND IN

MILES 5494.50 5494.50 5494.50 5494.50 102282.55

165.0COMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKS

Woodside Energy WR 325 32673 A-D Debra K. Benoit 713-401-0083

OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONS Diesel Engines HP GAL/HR GAL/D Nat. Gas Engines HP SCF/HR SCF/D

Burners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CO

DRILLING PRIME MOVER>600hp diesel 61200 2955.96 70943.04 24 152 43.14 197.89 1482.82 44.48 323.52 78.68 360.95 2704.66 81.14 590.11 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PRIME MOVER>600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 AUXILIARY EQUIP<600hp diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 1800 86.94 2086.56 8 130 1.27 5.82 43.61 1.31 9.52 0.66 3.03 22.73 0.68 4.96 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.58 2.65 19.89 0.60 4.34 VESSELS>600hp diesel(supply) 2100 101.43 2434.32 12 65 1.48 6.79 50.88 1.53 11.10 0.58 2.65 19.89 0.60 4.34 No Tugs Required VESSELS>600hp diesel(tugs-2) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

FACILITY DERRICK BARGE diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

INSTALLATION MATERIAL TUG diesel 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(crew) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 VESSELS>600hp diesel(supply) 0 0 0.00 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

MISC. BPD SCF/HR COUNT

TANK- 0 0 0 0.00 0.00

DRILLING OIL BURN 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

WELL TEST GAS FLARE 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

2016 YEAR TOTAL 47.37 217.29 1628.19 48.85 355.24 80.50 369.29 2767.17 83.01 603.75

EXEMPTION

CALCULATION DISTANCE FROM LAND IN

MILES 5494.50 5494.50 5494.50 5494.50 102282.55

165.0SUMMARY

COMPANY AREA BLOCK LEASE PLATFORM WELL

Woodside Energ WR 325 32673 A-D

Emitted Substance

Year

PM SOx NOx VOC CO

2013 79.97 366.86 2748.96 82.47 599.77

2014 79.97 366.86 2748.96 82.47 599.77

2015 79.97 366.86 2748.96 82.47 599.77

2016 80.50 369.29 2767.17 83.01 603.75

2017 0.00 0.00 0.00 0.00 0.00

2018 0.00 0.00 0.00 0.00 0.00

2019 0.00 0.00 0.00 0.00 0.00

2020 0.00 0.00 0.00 0.00 0.00

2021 0.00 0.00 0.00 0.00 0.00

2022 0.00 0.00 0.00 0.00 0.00

Allowable 5494.50 5494.50 5494.50 5494.50 102282.55

# Appendix G Oil Spill Response Discussion Oil Spill Response CertificationSPILL RESPONSE DISCUSSION

For the purpose of NEPA and Coastal Zone Mana gement Act analysis, the largest spill volum e originating from the proposed activity would be a well b l owout during drilling operations,

estimated to be 31,190 barrels of crud e oil with an API gravity of 23.9°.

Land Segment and Resource Identification

Trajectories of a spill a nd the prob ability of it im pacting a land segm ent have bee n projec ted utilizing information in the BS EE Oil Spill R isk Analysis Model (OSRAM) for the Central and

Western Gulf of Mexico available on the BSEE website. The results are shown in Figure 1. The BSEE OSRAM identifies a 3% proba bility of im pact to the s horelines of Ca meron Parish, Louisiana within 30 days. Cameron Parish includes the east side of Sabine Lake, Sabine National Wildlife Refuge, Calcasieu Lake, Lacassine Nationa l Wildlife Refuge (inland) and Grand Lake. Cameron Parish also includes the area along the coastline from Sabine Pass to Big Constance Lake in Rockefeller Wildlife Refuge. This region is co mposed of open public beaches, marshlands and swam ps. It serves as a habita t for num erous birds, finf ish and other anim als, including several rare, threat ened and endangered species.

Response

Woodside Energy (USA) Inc. will make every effort to respond to the Wo rst Case Discharge as effectively as practicable. A de scription of the response equipmen t under contract to contain and

recover the Worst Case Discharge is shown in Figure 2.

Using the estim ated chem ical and physical charact eristics of crude oil, an ADIOS weathering model was run on a similar product from the ADIO S oil database. The results indicate 28% or approximately 8,733 barrels of crude oil would be evaporated/dispersed within 24 hours, with approximately 22,457 barrels remaining.

Spill Response WR 325 Barrels of Oil

WCD Volume 31,190

Less 28% natural evaporation/dispersion 8 ,733

Remaining volume 22,457

Daily dispersant capability 7,540

Figure 2 o utlines equ ipment, pers onnel, m aterials and su pport ves sels as well as tem porary storage equipment available to respond to a spill of approx imately 22,457 barrels. The volum e accounts for the am ount remaining after evaporatio n/dispersion at 24 hours. The list estim ates individual times needed for proc urement, load out, travel time to the site and deployment. Figure

2 also indicates how operations will be supported.

Woodside Energy (USA) Inc.’s Oil Spill Response Plan incl udes alternative response technologies such as dispersants and in-situ burn. Strategies will be decided by UnifiedCommand based on size of the spi ll, weath er and potential im pacts. If aerial d ispersants are utilized, 8 sorties (9,600 gallons) from two of the DC-3 aircrafts and 4 sorties (8,000 gallons) from the Basler aircraf t would provide a dail y dispersan t capability o f 7,540 barrels. If the conditions are favorable for in-situ burning, the proper approvals have been obtained and the proper plan ning is in p lace, in -situ burning of oil m ay be attem pted. Slick containm ent boom would be immediately called out and on-scene as soon as possible. Offshore response strategies may include attempting to skim utilizing the HO SS Barge and three Fast Response Units, with a total derated skimming capacity of 55,753 barrels. Temporary storage associated with skimm ing equipment equals 4,500 barrels. If additional stor age is needed, three 20,000 barrel storage barge may be mobilized and centrally located to provi de temporary storage allowing the skimm ers to stay in the area of operations as much as possible. Safety is first priority. Air monitoring will be accomplished and operations deemed safe prio r to any containment/skimming attempts.

If the spill went unabated, s horeline impact in Ca meron Pa rish, Louisiana would depend upon existing environm ental conditions. Shoreline prot ection would include the use of CGA’s near

shore and shallow water skimm ers with a tota led derated skimm ing cap acity of 13,253 barrels. Temporary storage associated with skimming equipment equals 256 barrels. If additional storage is needed, a 23,000 barrel s torage barge m ay be mobilized and centrally located to prov ide temporary storage a llowing the sk immers to stay in the area of operation s as m uch as possib le. Onshore response m ay include the d eployment of shoreline boom on beach areas, o r protection and sorbent boom on vegetated areas. A Mas ter Service Agreement with Oil Mop will ensure access to 3 0,000 feet of 18” shoreline p rotection boom . Figure 2 o utlines ind ividual tim es needed for procurem ent, load out, travel tim e to the site and deploym ent. Strategies would be based upon surveillance and real tim e trajectories that depict areas of potential impact given

actual sea and weather conditions. The State of Louisiana Initial Oil S pill Response Plan for

Cameron Parish and Unified Command would be consulted to ensure that environm ental and special eco nomic reso urces would be correctly identified and prior itized to en sure optim al protection. Shoreline protect ion strategies depict the protecti on response modes applicable for oil spill clean-up operations. The State of Louisiana Initial Oil Spill Response Plan provides detailed shoreline protection strategies for this area, and it describes necessa ry action to keep the oil spi ll from entering Louisiana’s coastal wetlands, based on the assumption that re moval of the released oil will be much easier and less dam aging to fragile coastal ecosystem s if done in the open waters of the Gulf of M exico. Supervisory pers onnel have the option to modify the deploym ent and operation of equipm ent allowing a m ore eff ective respo nse to site-s pecific circu mstances. Woodside Energy (USA) Inc.’s cont ract Spill Managem ent Team holds a copy of the State of

Louisiana Initial Oil Spill Response Plan.

Based on the anticipated wors t cas e discharge scenario, Woodside Energy (USA) Inc. can be

onsite with contracted o il spill recovery equipm ent with ad equate response capacity to contain and recover surface hydrocarbons , and prevent land im pact to the m aximum extent practicab le, within 48 hours (based on the equipm ent’s Eff ective Daily Recovery Capacity (EDRC)). Woodside Energy (USA) Inc. will continue to co mmit additional on-water m echanical recovery resources as well as apply dispersants and in -situ burning needed and as approved, under the supervision of the USCG Captain of the Port (COTP) and the Regional Response Team (RRT).Initial Response Considerations Actual actions taken during an oil spill response will be based on many factors to include but not

be limited to:

• Weather

• Equipment and materials availability

• Ocean currents and tides

• Location of the spill

• Product spilled

• Amount spilled

• Environmental risk assessments

• Trajectory and product analysis

• Well status, i.e., shut in or continual release

Woodside Energy (USA) Inc. will take action to provide a safe, aggressi ve response to contain and recover as much of the spilled oil as quickly as it is saf e to do so. In an effort to protect the environment, response actions wi ll be designed to provide an “in-depth” protection strategy meant to recover as much oil as possible as far from environmentally sensitive areas as possible. Safety will take precedence over all other considerations during these operations.

Upon notification of a spill, the following actions will be taken:

• Information will be confirmed

• An assessment will be made and initial objectives set

• OSROs and appropriate agen cies will be notified

• ICS 201, Initial Report Form completed

• Initial Safety plan will be written and published

• Unified Command will be established

o Overall safety plan developed to reflect the operational situa tion and coordinated objectives

o Areas of responsibility esta blished for Source Control a nd each surface operational

site

o On-site command and control established

Offshore Response Actions

Equipment Deployment

Surveillance

• Surveillance Aircraft: within two hours of QI notificati on, or at first light

• Provide trained observer to pr ovide on site status reports

• Provide command and control platfo rm at the site if needed

• Continual surveillance of oil movement by remote sensing systems, aerial photography

and visual confirmation

• Continual monitoring of vessel assets using vessel monitoring systemsDispersant application assets

• Put ASI on standby

• With the FOSC, conduct analysis to determin e appropriateness of dispersant application

• Gain FOSC approval for use of dispersants on the surface

• Deploy aircraft in accordance with a plan developed for the actual situation

• Coordinate movement of dispersants, ai rcraft, and support equipment and personnel

• Confirm dispersant availability fo r current and long range operations

• Start ordering dispersa nt stocks required for expected operations

Containment boom

• Call out early and expedite deployment to be on scene ASAP

• Ensure boom handling and mooring equipment is deployed with boom

• Provide continuing reports to vessels to expedite their arrival at sites that will provide for

their most effective containment

• Use Vessels of Opportunity (VOO) to deploy and maintain boom

Dedicated off-shore skimming systems

General

• Deployed to the highest concentration of oil

• Assets deployed at safe distance from aer ial dispersant and in-situ burn operations

CGA HOSS Barge

• Use in areas with heaviest oil concentrations

• Consider for use in areas of known debris (seaweed, and other floating materials)

CGA FRUs

• To the area of the thickest oil

• Use as far off-shore as allowed

• VOOs 140’ – 180’ in length

• VOOs with minimum of 18’ x 38’ or 23’ x 50’ of optimum deck space

• VOOs in shallow water should have a dr aft of <10 feet when fully loaded

Storage Vessels

• Establish availability of CGA contracted assets

• Early call out (to allow for tug boa t acquisition and deployment speeds)

• Phase mobilization to allow storage vessels to arrive at the same time as skimming

systems

• Position as closely as possible to ski mming assets to minimize offloading timeVessels of Opportunity (VOO)

• Use Woodside Energy (USA) Inc.’s cont racted resources as applicable

• Industry vessels are usually best for deployment of Vessel of Opportunity Skimming Systems (VOSS)

• Acquire additional resources as needed

• Consider use of local assets, i.e. fishing and pleasure craft

• Expect mission specific and sa fety training to be required

• Plan with the US Coast Guard for vessel inspections

In-situ Burn assets

• Determine appropriateness of in-situ burn ope ration in coordination with the FOSC and

affected SOSC

• Determine availability of fire boom and selected ignition systems

• Start ordering fire boom stocks required for expected operations

• Contact boom manufacturer to provide training if required

• Determine assets to perform on water operation

• Build operations into safety plan

• Conduct operations in accordance with an approved planNear Shore Response Actions

Timing

• Put near shore assets on standby and deploym ent in accordance with planning based on the actual situation, actual trajectories and oil budgets

• VOO identification and training in advance of spill nearing shoreline if possible

• Outfitting of VOOs for specific missions

• Deployment of assets based on actual movement of oil

Considerations

• Water depth, vessel draft

• Shoreline gradient

• State of the oil

• Use of VOOs

• Distance of surf zone from shoreline

Equipment Deployment

Surveillance

• Provide trained observer to direct skimming operations

• Continual surveillance of oil movement by remote sensing systems, aerial photography

and visual confirmation

• Continual monitoring of vessel assets

Dispersant Use

• Generally will not be approved within 3 miles of shore or with less than 10 meters of water depth

• Approval would be at Regional Re sponse Team level (Region 6)

Vessel Deployment Dedicated Near Shore skimming systems

• FRVs

• Egmopol and Marco SWS

• Operate with aerial spotter directi ng systems to observed oil slicks

VOO

• Use Woodside Energy (USA) Inc.’s cont racted resources as applicable

• Industry vessels are usually best for deployment of Vessel of Opportunity Skimming Systems (VOSS)

• Acquire additional resources as needed

• Consider use of local assets, i.e. fishing and pleasure craft

• Expect mission specific and sa fety training to be required

• Plan with the US Coast Guard for vessel inspections

• Operate with aerial spotter directing systems to oil patchesShoreline Protection Operations

Response Planning Considerations

• Environmental risk assessments (ERA) to determine prioritie s for area protection

• Time to acquire personnel and eq uipment and their availability

• Previous contingency planning contained in the appropriate Area Contingency Plan, and currently for Louisiana, The State of Loui siana Initial Oil Spill Response Plan, Deep Water Horizon, dated 2 May 2010 (La. OSRP)

Actions

Placement of boom

• Position boom in accordance with the ERA based on the actual situation or the appropriate ACP

• Assess timing of booming operations to ensure it is where it needs to be at time of impact. Consider:

o Trajectories

o Weather forecast

o Oil Impact forecast

o Verified spill movement

o Boom, manpower and vessel (shallow draft) availability

o Near shore boom and support material, (stakes, anchors, line)

Beach Preparation

Considerations and Actions

• Use of a 10 mile go/no go line to determine timing of beach cleaning

• Shoreline Cleanup and Assessment Team Reports and recommendations

• Determination of Archeological site s and gaining authority to enter

• Monitoring of tide tables and weather to determine extent of high tides

• Pre cleaning of beaches by moving waste above high time lines to minimize waste

• Staging of equipment and housing of respons e personnel as close to the job site as possible to maximize on-site work time

• Boom tending, repair, replacement and security (u se of local assets may be advantageous)

• Constant awareness of weather and oil moveme nt for resource redeployment as necessary

• In-situ burn may be considered when marshes have been impacted

• Passive clean up of marshes should considered and appropriate stocks of sorbent boom and/or sweep obtained

• Earthen berms and shoreline protection boom may be considered to protect sensitive

inland areasDecanting Strategy Recovered oil and wa ter m ixtures will typic ally se parate into d istinct phase s when lef t in a quiescent state. W hen s eparati on occurs, the relatively clean water phase can be siphoned or decanted back to the recovery point with m inima l, if any, impact. Decan ting therefore increases the effective on-site oil storage c apacity a nd equipment operating time. FOSC/SOSC approval will be req uested p rior to decan ting operation s. This pra ctice is rou tinely used f or oil spill

recovery.

CGA Equipment Limitations The capability f or any spill respon se equipm ent, whether a dedica ted or portab le system , to operate in differing weather conditions will be directly in rela tion to the capabilities of the vessel the system in placed on. Most importantly, however, the decision to operate will be based on the judgment of the Unified Command a nd/or the Captain of the vessel, who will ultimately have the final say in te rminating opera tions. Skimm ing equipment listed below m ay have operational limits which exceed thos e safety thresholds. As was seen in the Deepwater Horizon (DWH) oil spill response, vessel skimming opera tions ceased when seas reache d 5-6 feet and vessels were often recalled to port when those conditions w ere exceeded. System s below are som e of the most up-to-date systems available and were employed during the DWH spill.

Boom 3 foot seas, 20 knot winds Dispersants Winds more than 25 knots Visibility less than 3 nautical miles Ceiling less than 1,000 feet.

FRU 8 foot seas HOSS Barge/OSRB 8 foot seas Koseq Arms 8 foot seas

OSRV 4 foot seasEnvironmental Conditions in the GOM Louisiana is situated between the easterly and westerly wind belts, and therefore, experien ces westerly winds during the wint er and easterly winds in th e summ er. Average wind speed is generally 14-15 m ph a long the coast. W ave he ights average 4 and 5 feet. However, during hurricane season, Louisiana has recorded wave heights ranging from 40 to 50 feet high and winds reaching speeds of 100 mph. Because much of southern Louisiana lies below sea level, flooding is prominent.

Surface water temperature ranges between 70 and 80  ̊ F during the summ er months. During the winter, the average temperatur e will range from 50 and 60  ̊ F.

The Atlantic and Gulf of Mexico hurricane seas on is officially from 1 June to 30 Nove mber. 97% of all tropical activity occurs within this window. The Atlant ic basin shows a very peaked season from August through October, with 78% of the tropical storm days, 87% of the m inor (Saffir-Simpson Scale categories 1 and 2) hurricane days, and 96% of the m ajor (Saffir-Simpson categories 3, 4 and 5) hurricane days occurri ng then. Maxim um activity is in early to m id September. Once in a few years there may be a hurri cane occurring "out of season" - primarily in May or Decem ber. Globally, September is the mo st active month and May is the least active

month.FIGURE 1

TRAJECTORY BY LAND SEGMENT

Trajectory of a spill and the probability of it impacting a land segment have been projected utilizing Woodside Energy (USA) Inc.’s WC D and information in the BSEE Oil Spill Risk Analysis Model (OSRAM) for the Central and Western Gulf of Me xico available on the BSEE website using 30 day impact. The results are tabulated below.

Area/Block OCS-G Launch

Area Land Segment and/or

Resource Conditional Probability (%) within 30 days

Exploratory Drilling

WR 325

165 miles from shore G32673 C47 Matagorda County, TX Brazoria County, TX Galveston County, TX Jefferson County, TX Cameron Parish, LA Vermilion Parish, LA Terrebonne Parish, LA Plaquemines Parish, LA 1

1

2

1

3

1

1

1WCD Scenario– BASED ON WELL BLOWOUT DURING DRILLING OPERATIONS(165 miles from shore)22,457bbls of crude oil (Volume considering natural weathering)API Gravity 23.9°FIGURE 2 – Equipment Response Time to WR 325Dispersants/SurveillanceDispersant/SurveillanceDispersantCapacity (gal)StorageCapacityPersonsReq.From Hrs to ProcureHrs toLoadoutTravel tositeTotal HrsCGABasler 67T2000 NA2 Houma11 1.1 3.1ASIDC 31200 NA2 Houma11 1.4 3.4DC 31200 NA2 Houma11 1.4 3.4Aero CommanderNANA 2 Houma11 1.13.1Offshore ResponseOffshore Equipment NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsCGAHOSS Barge43000 4000 3 Tugs 8Harvey7 0 5 20.3 1 33.3Recovered Oil Storage NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsEnterprise Marine Services LLC (available through contract with CGA)CTCo 2604NA 20000 1 Tug 6Amelia4 12 4 22.5 1 43.5CTCo 2605NA 20000 1 Tug 6Amelia4 12 4 22.5 1 43.5CTCo 2606NA 20000 1 Tug 6Amelia4 12 4 22.5 1 43.5Staging Area: FourchonOffshore Equipment WithStagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toSiteHrs toDeployTotalHrsCGAFRU (2) + 100 bbl Tank (4) 8502 400 2 Utility 12 Leeville 1 2 .5 14.6 1 19.1FRU (1) + 100 bbl Tank (1) 4251 100 1 Utility 6Harvey1 2 2.75 14.6 1 21.3542” Auto Boom (5000’) NA NA 10 Crew 20 Galveston 1 2 7 14.6 1 25.642” Auto Boom (10000’) NA NA 0 Crew 40Harvey1 2 2.75 14.6 1 21.3542” Auto Boom (2500’) NA NA 6 Crew 12 Ingleside 1 2 9.5 14.6 1 28.142” Auto Boom (5000’) NA NA 10 Crew 20 Lake Charles 1 2 4 14.6 1 22.642” Auto Boom (2500’) NA NA 6 Crew 12 Pascagoula 1 2 4 14.6 1 22.61000’ Hydro-Fire Boom NA NA 8 Utility 40Harvey1 4 2.75 14.6 6 28.35Nearshore ResponseNearshore Recovered OilStorage No StagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsEnterprise Marine Services LLC (available through contract with CGA)CTCo 2607NA 23000 1 Tug 6Amelia4 23 4 13.75 1 34.75Staging Area: CameronNearshore and InlandSkimmers With StagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotalHrsCGASWS Egmopol3000 100 NA 3 Galveston 1 2 3.520 8.5SWS Egmopol3000 100 NA 3Houma1 2420 9SWS Marco3588 34NA 3Houma1 2420 9SWS Marco3588 20NA 3Lake Charles 1 2120 6Rope Mop77 2 0 3 Belle Chasse 1 2 4.520 9.5Shoreline ProtectionStaging Area: CameronShoreline ProtectionBoomVOOPersonsReq.Storage/WarehouseLocationHrs toProcureHrs toLoadoutTravel toStagingTravel toDeployment SiteHrs toDeployTotal HrsOil Mop (available through MSA)10,000’ 18” Boom 4 Crew 10New Iberia, LA1 1 2.5239.510,000’ 18” Boom 4 Crew 10Houston, TX1 1 2.5239.510,000’ 18” Boom 4 Crew 10Port Arthur, TX1 1 1.25238.25Beach BoomEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotalHrsCGABeach Boom (2000’)NA NA NA 6 Galveston 1 2 3.512 9.5Beach Boom (1000’)NA NA NA 4 Ingleside 1 2612 12Beach Boom (2000’)NA NA NA 6 Pascagoula 1 2 5.512 11.5Wildlife Response EDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotalHrsCGAWildlife Support Trailer NA NA NA 2Houma1 2412 10Bird Scare Guns (24)NA NA NA 2 Belle Chasse 1 2 4.512 10.5Bird Scare Guns (12)NA NA NA 2 Galveston 1 2 3.512 9.5Bird Scare Guns (24)NA NA NA 2Houma1 2412 10Bird Scare Guns (12)NA NA NA 2 Ingleside 1 2612 12Bird Scare Guns (24)NA NA NA 2 Lake Charles 1 2112 7Bird Scare Guns (24)NA NA NA 2 Pascagoula 1 2 5.512 11.5Response AssetTotalOffshore EDRC55,753Offshore Recovered Oil Storage64,500Nearshore / Shallow Water EDRC13,253Nearshore / Shallow Water Recovered Oil Storage23,256NATI(}HAL RESPONSE co'|poRATroN 6620 CYPRESSWOOD DRlvE. STE.201 SPRING, TEXAS 77379 (281) 899-4&18

. FAX {281i 89s-4849

a SEACORcompany



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# Appendix H Consistency Cer tification

# Appendix I Environmental Impact Analysis

## Woodside Energy (USA), Inc. (Woodside)

Supplemental/Revised Exploration Plan Walker Ridge Block 325

OCS-G 32673

(A) Impact Producing Factors

ENVIRONMENTAL IMPACT ANALYSIS WORKSHEET

Environment

Resources Impact Producing Factors (IPFs) Categories and Examples Refer to recent GOM OCS Lease Sale EIS for a more complete list of IPFs

Emissions (air, noise, light, etc.) Effluents (muds, cutting, other discharges to

the water

column or seafloor) Physical

disturbances to the

seafloor (rig or

anchor emplacements, etc.) Wastes sent

to shore for

treatment or disposal Accidents (e.g., oil spills,

chemical spills, H 2 S releases) Discarded

Trash &

Debris

Site-specific at Offshore

Location

Designated topographic features (1) (1)

Pinnacle Trend area live bottoms (2) (2)

Eastern Gulf live bottoms (3) (3)

Benthic communities (4)

Water quality X(5) X(5)

Fisheries X(6) X(6)

Marine Mammals X(7) X(7) X(7) X(7)

Sea Turtles X(8) X(8) X(8) X(8)

Air quality (9)

Shipwreck sites (known or potential) (10)

Prehistoric archaeological sites (11)

Vicinity of Offshore Location

Essential fish habitat X(1) X(1)

Marine and pelagic birds (2) X(2) X(2)

Public health and safety

Coastal and Onshore

Beaches X(1) X(1)

Wetlands X(2) X(2)

Shore birds and coastal nesting

birds X(3) X(3)

Coastal wildlife refuge s X(4) X(4)

Wilderness areas X(5) X(5)Footnotes for Environmental Impact Analysis Matrix

1) Activities that may affect a marine sanctuary or topographic feature. Specifically, if th e well or platform site or any anchors will be on the seafloor within the:

o 4-mile zone of the Flower Garden Banks, or the 3-mile zone of Stetson Bank;

o 1000-m, 1-mile or 3-mile zone of any topographic feature (submarine bank) protected by the Topographic Features Stipulation attached to an OCS lease;

o Essential Fish Habitat (EFH) criteria of 500 ft. from any no-activity zone; or

o Proximity of any submarine bank (500 ft. buffer zone) w ith relief greater than 2 meters that is not protected by the Topographic Features Stipul ation attached to an OCS lease.

2) Activities with any bottom disturbance within an OCS lease block protected through the Live Bottom (Pinnacle Trend) Stipulation attached to an OCS lease. 3) Activities within any Eastern Gulf OCS block where seaflo or habitats are protected by the Live Bottom (LowRelief) Stipulation attached to an OCS lease. 4) Activities on blocks designated by the BOEM as being in water depths 300 meters or greater. 5) Exploration or production activities where H2S concentr ations greater than 500 ppm might be encountered. 6) All activities t hat could result in an accidental spill of produced liquid hydr ocarbons or diesel fuel that you determine would im pact these envi ronmental resources. If the proposed action is lo cated a sufficie nt distance from a resource that no impact would occur, the EIA can note that in a sentence or two. 7) All activities that involve seafloor disturbances, including anchor emplacements, in any OCS block designated by the BOEM as h aving high-probability for the occurrence of shipwrecks or p rehistoric sites, in cluding such blocks that will be affected that are adjacent to the leas e block in which your planned activity will occur. If the proposed activities are located a sufficient distance from a shipwreck or a prehistoric site that no impact would occur, the EIA can note that in a sentence or two. 8) All activities that you determine might have an adverse effect on endangered or threatened marine mammals or

sea turtles or their critical habitats. 9) Production activities that involve trans portation of produced fluids to shor e using shuttle tankers or barges.

### (B) Analysis

Site-Specific at Walker Ridge Block 325

Proposed operations consist of the revision of previ ously approved Well Locations A, B and C,

the addition of Well Location D a nd the drilling of these wells.

The operations will be conducted with a dynamically positioned semi-submersible.

1. Designated Topographic Features

Potential IPFs on topographic features include effluents, and accidents.

Effluents: Walker Ridge Block 325 is 93 m iles fr om the closest designated Topographic Features Stipulation Block (Sweet Bank); ther efore, no adverse impacts are expected.

Accidents: It is unlikely that an acciden tal su rf ace or sub surface spill would occur from the proposed activities (refer to statistics in Item 5 , W ater Quality). Oil s pills cause dam age to benthic organisms only if the oil contacts the organi sms. Oil from a surface spill can be driven into the water colum n; measurable amounts have been docum ented down to a 10 m depth. At this depth, the oil is found only at concentrations several orders of ma gnitude lower than the

amount shown to have an effect on corals. Becau se the crests of topogr aphic features in the Northern Gulf of Mexico are foun d below 10 m, no oil from a surface sp ill could reach their sessile biota. Oil from a subsurface spill is not app licable due to the distance of these blocks from a topographic area. The activities proposed in this plan will be covered by Woodside’s Regional OSRP (refer to information submitted in Appendix G ).

There are no other IPFs (includi ng emissions, physical disturbances to the seafloor and wastes sent to shore for disposal) from the proposed act ivities, which could imp act topographic features.

2. Pinnacle Trend Area Live Bottoms

Potential IPFs on pinnacle trend area live bo ttoms include effluent s and accidents.

Effluents: Walker Ridge Block 325 is 239 m iles from the closest live botto m (pinnacle trend) area; therefore, no adverse impacts are expected.

Accidents: It is unlikely that an acciden tal su rf ace or sub surface spill would occur from the proposed activities (refer to statistics in Item 5 , Water Quality). Oil spill s have the potential to foul benthic communities and caus e lethal and sublethal effects on live bottom organisms. Oil from a surface sp ill can be dr iven into the w ater colum n; m easurable am ounts have been documented down to a 10 m depth. At this depth, the oil is found only at concentrations several orders of magnitude lower than the amount shown to have an effect on m arine organisms. Oilfrom a subsurface spill is not a pplicable due to the dis tance of these blocks from a live bottom (pinnacle trend) area. The activ ities proposed in this p lan will be covered by Woodside’s Regional OSRP (refer to information submitted in Appendix G ).

There are no other IPFs (includi ng emissions, physical disturbances to the seafloor and wastes sent to shore for disposal) from the proposed activities which could im pact a live bottom (pinnacle trend) area.

3. Eastern Gulf Live Bottoms

Potential IPFs on Eastern Gulf live bottoms include effluents and accidents.

Effluents: Walker Ridge Block 325 is not located in an area characterized by the existence of live bottoms; therefore, no a dverse impacts are expected.

Accidents: It is unlikely that an acciden tal su rf ace or sub surface spill would occur from the proposed activities (refer to statistics in Item 5 , Water Quality). Oil spills cause d amage to live bottom organisms only if the oil con tacts the organi sms. Oil from a surface spill can be driven into the water colum n; measurable amounts have been docum ented down to a 10 m depth. At this depth, the oil is found only at concentrations several orders of ma gnitude lower than the

amount shown to have an effect on m arine inve rtebrates. Oil from a subsurface s pill is not applicable due to the distance of these blocks from a live bottom area. The activities proposed in this p lan will be cover ed by W oodside’s Regi onal OSRP (ref er to inf ormation subm itted in Appendix G ).

There are no other IPFs (includi ng emissions, physical disturbances to the seafloor and wastes sent to shore for disposal) from the proposed ac tivities which could impact an Eastern Gulf live

bottom area.

4. Benthic Communities

Walker Ridge Block 325 is locate d in water depths 984 feet (300 meters) or greater. Potential IPFs that co uld resu lt in im pacts to benthic communities fro m the proposed activities includ e physical disturbances to the seafloor.

Physical disturbances to the seafloor: A dy namically p ositioned se mi-submersible is being used for the proposed activ ities; therefore, only an insignificant am ount of seafloor will be disturbed. Because ph ysical distu rbances to the seafloor will be m inimized by the use of a dynamically positioned sem i-submersible, W oods ide’s proposed operations in W alker Ridge Block 325 would not cause im pacts to benthic co mmunities. Additionally, Walker Ridge Block 325 is approxim ately 71 m iles from the closes t known benthic community site (BenthicGreen Canyon Block 287), lis ted in NTL 2009-G40. The proposed activ ities will be conducted inaccordance with NTL 2009-G40, which will en sure that features o r areas that cou ld support high-density benthic communities will not be impacted.

There are n o other IPF s (includ i ng e missions, effluents, wastes sent to shore for disposal, or accidents) from the proposed activities wh ich could impact benthic communities.

5. Water Quality

IPFs that could result in wate r quality degradation from the pr oposed operations in Walker Ridge

Block 325 include effluents and accidents.

Effluents: Levels of contaminants in drilling muds and cuttings and produced water discharges, discharge-rate restrictions a nd monitoring and toxicity testin g are regulated by the EPA NPDES permit, thereby elim inating m any significant bi ological o r eco logical effects. Operational discharges are not expected to cause si gnificant adverse impacts to water quality.

Accidents: Oil sp ills have the potential to alter o ffshore water quality; how ever, it is un likely

that an accidental surface or s ubsurface spill would occur from th e proposed activities. Between 1980 and 2000, OCS operations produced 4.7 billion barrels of oil and spilled only 0.001 percent of this oil, or 1 bbl for every 81,000 bbl produced. The spill risk related to a diesel spill from drilling operations is even less. Between 1976 and 1985, (years for which da ta were collected), there were 80 reported diesel spil ls greater than one barrel associ ated with dr illing activities . Considering that there were 11,944 wells drille d, this is a 0.7 percen t probability of an occurrence. If a spill were to occu r, the water quality of m arine waters would be tem porarily affected by the disso lved com ponents and s mall oil d roplets. Disp ersion by currents and microbial degradation would remove the oil from the water column and dilute the constituents to background levels. Historically, changes in offshore water quality from oil spills have only been detected during the life of the spill and up to seve ral months afterwards. Most of the components

of oil are insoluble in water and theref ore f loa t. The activities propo sed in this plan will be covered by Woodside’s Regional Oil Spill R espons e Plan (refer to infor mation subm itted in Appendix G ).

There are no other IPFs (includi ng emissions, physical disturbances to the seafloor, and wastes sent to shore for disposal) from the proposed activities which could cause im pacts to water quality.

6. Fisheries

IPFs that could cause impacts to fisheries as a result of the proposed opera tions in Walker Ridge

Block 325 include efflue nts and accidents.

Effluents: Effluents such as drillin g fluids and cutting s discharges co ntain com ponents and properties which are detrim ental to f ishery resources. Moderate petroleum and m etalcontamination of sediments and the water column can occur out to several hundred meters downcurrent from the discharge point. Offshore discharges are expected to disperse and dilute to very near background levels in the water colum n or on the seafloor within 3,000 m of the discharge point, and are expected to have negligible effect on fisheries.

Accidents: An accidental o il sp ill has th e p otent ial to cause som e detrim ental effects on fisheries; however, it is unlikely that such an event would occur from the proposed activities (refer to Item 5 , Water Quality). T he effects of oil on m obile adult finfish or she llfish would likely be sublethal and the extent of damage woul d be reduced to the cap acity of adult fish and shellfish to avoid the s pill, to m etabolize hydr ocarbons, and to excrete both m etabolites and parent compounds. The activities pr oposed in this plan will be covered by Woodside’s Regional OSRP (refer to information submitted in Appendix G ).

There are no IPFs from em issions, physical disturba nces to the seafloor or wastes sent to shore for disposal from the proposed activities which could cause imp acts to fisheries.

7. Marine Mammals

GulfCet II studies revealed that cetaceans of the continental shelf and shelf-edge were alm ost exclusively bottlenose dolphin a nd Atlantic spotted dolphin. S quid eaters, including dwarf and pygmy killer whale, Risso’s dolphin, rough-toothed dolphin, a nd Cuvier’s beaked whale, occurred most frequently along the upper slope in areas outside of anticyclones. IPFs that could cause impacts to marine mammals as a result of the proposed operations in W alker Ridge Block 325 include emissions, effluents, discarde d trash and debris, and accidents.

Emissions: Noises from drilling activ ities, support vessels and helico pters may elicit a startle

reaction from marine m ammals. This rea ction m ay lead to disruption of m arine m ammals’ normal activities. Stress m ay make them more vul nerable to parasites, disease, environm ental contaminants, and/or predation (Majors and Myri ck, 1990). There is little conclusive evidence for long-term displacements and population trends for marine mammals relative to noise.

Effluents: Drilling fluids and cutti ngs discharges contain components which may be detrimental to marine mammals. Most operational discharges are diluted and dispersed upon release. Any potential impact from drilling flui ds would be indirect, either as a result of impacts on prey items or possibly through ingestion in the food chain (API, 1989).

Discarded trash and debris: Both entanglement in, and inge stion of debris have caused the death or serious injury of m arine mammals (Laist, 1997; MMC, 1999). The lim ited amount of marine debris, if any, resulting from the proposed act ivities is not expected to substantially harm marine mammals. Operators are pro hibited from deliberately discharging debris as mandated by

MARPOL-Annex V and the Marine Plastic Polluti on Research and Control Act, and regulations imposed by various ag encies in cluding the United States Coast Guard (USCG) and the Environmental Protection Agency (EPA).Woodside will operate in accordance with the regulations an d also avoid accidental loss of solid waste items by maintaining waste management plans, manifesting trash sent to shore, and using special precautions such as coveri ng outside trash bins to prevent accidental loss of solid waste. Special cau tion will be exercised w hen handlin g and disposing of sm all item s and packaging materials, particularly those m ade of non-biode gradable, environm entally persistent m aterials such as plastic or glass.

Informational pla cards will be po sted on a ll vessels and f acilities h aving sleeping or f ood preparation capabilities. All offshore personne l, including contract ors and other support services-related personnel (e.g. helicopter pilots, vessel capt ains and boat crews) will be indoctrinated on waste procedures, and will view the video (or Microsoft PowerPoint presentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view the marine trash and debris training video annually. Offshore personnel will also receive an explanation from Woodside m anagement or the d esignated lease operator m anagement that em phasizes their commi tment to waste m anagement in acco rdance

with NTL No. 2007-G03.

Accidents: Collisions between support vessels and cetaceans would be unusual events, however should one occur, death or injury to marine mammals is possible. Contract vessel operators can avoid marine mammals and reduce potential deaths by m aintaining a vigilant watch for m arine mammals and m aintaining a safe d istance when they are s ighted. Vess el crews sh ould use a reference guide to he lp identify the twenty-eigh t species of whales and dolphins, and the single species of m anatee that m ay be encountered in the Gulf of Mexico OCS. Vessel crews m ust report sightings of any injured or dead protected marine ma mma l species immediately, regardless of whether th e injury or death is cau sed by their vessel, to the Marine Mamm al and Sea Turtle S tranding Hotline at (888 ) 404-3922, the NMFS Southeast R egional Office at (727 ) 824-5312, or the Marine Mamm al Stranding N etwor k at (305) 862-2850. In addition, if the injury or de ath was cau sed by a co llision with a contract v essel, the BOEM m ust be notif ied within 24 h ours of the strik e by e mail to protectedspecies@BOEM.gov . If the vessel is the responsible party, it is required to remain available to assist th e respective salvage and stranding

network as needed.

Oil spills h ave the potentia l to ca use suble thal oil-related injur ies an d spill-re lated deaths to marine m ammals. However, it is unlike ly th at an accid ental o il sp ill would occur from the proposed activities (refer to Item 5 , Water Quality). Oil sp ill response activ ities may increas e vessel traffic in th e area, which could add to changes in cetacean behavior and/or distribution, thereby causing additional stress to the animals. The effect of oil dispersants on cetaceans is no t known. The acute toxicity of oil dispersant chem icals included in W oodside’s OSRP is considered to be low when com pared with the c onstituents and fractions of crude oils and diesel products. T he activities proposed in this plan will be covered by Woodside’s OSRP (refer to

information submitted in accordance with Appendix G ).There are no other IPF s (including physical di sturbances to the seafloor) from the proposed activities which could impact marine mammals.

8. Sea Turtles

IPFs that could cause im pacts to sea turtles as a result of the proposed operations include emissions, effluents, discarded tr ash and debris, and accidents. Gu lfCet II studies sighted m ost loggerhead, Kem p’s ridley and le atherback sea turtles over shel f waters. Historically these species have been sighted up to the shelf’s edge. They appear to be more abundant east of the Mississippi River than they are west of the river (Fritts et al., 1983b; L ohoefener et al., 1990). Deep waters may be used by all sp ecies as a transitory habitat.

Emissions: Noise from drilling activi ties, support vessels, and heli copters may elicit a s tartle reaction from sea turtles, but th is is a temporary disturbance.

Effluents: Drilling fluids and cuttings discharges are not k nown to be lethal to sea turtles. Most operational discharges are dilu ted and dispersed upon release. Any potential impact from drilling fluids would be indirect , either as a res ult of im pacts on prey item s or possibly through ingestion in the food chain (API, 1989).

Discarded trash and debris: Both entanglement in, and inge stion of, debris have caused the death or serious injury of sea tu rtles (Balazs, 1985). The limited am ount of marine debris, if any, resulting from the proposed activitie s is not expected to substantially harm sea turtles. Operators are prohibited from deliberately discharging de bris as mandated by MARPOL-Annex V and t he

Marine Plastic Pollution Research and Control Ac t, and regulations imposed by various agencies including th e United States Coast Guard (USC G) and the Environmental Protection Agency (EPA). Woodside will operate in accordance with the regulations and also avoid accidental loss of solid was te items by m aintaining waste m anageme nt plans, m anifesting trash sent to shore, and using special precautions such as covering outside trash bins to pr event accidental loss of solid waste. Special cau tion will be exercised w h en handling and disposing of sm all items and packaging m aterials, particularly those m ade of non-biodegradable, environm entally persistent materials such as plastic or glass.

Informational placards will be pos ted on all vessels and facilities h aving sleeping or food preparation capabilities. All offshore personne l, including contract ors and other support services-related personnel (e.g. helicopter pilots, vessel capt ains and boat crews) will be indoctrinated on waste procedures, and will view the video (or Microsoft PowerPoint presentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view the marine trash and debris training video annually. Offshore personnel will also receive an explanation from Woodside m anagement or the d esignated lease operator m anagement th at em phasizes th eir co mmitment to waste m anagement in acco rdance

with NTL No. 2007-G03.Accidents: Collisions between support vessels and s ea turtles would be unusual events, however should one occur, death or injury to sea turtles is possible. Cont ract vessel operators can avoid sea turtles and reduce potential deaths by m ain taining a vigilant watch for sea turtles and maintaining a safe distance when they are sighte d. Vessel crews should use a reference guide to help identify the five species of sea turtles that may be encountered in the Gulf of Mexico OCS. Vessel crews m ust report sightings of any inju red or dead protecte d se a tu rtle spec ies immediately, regardless of whethe r the injury or death is caused by their vessel, to the Ma rine Mammal and Sea Turtle Stranding Hotline at (888) 404-3 922, the NMFS Southeast Region al Office at (727) 824-5312, or th e Marine Mamm al Stranding Ne twork at (305) 862-2850. In addition, if the injury o r death was caused by a collision with a contract vessel, the BOEM must

be notified within 24 hours of the strike by email to protectedspecies@BOEM.gov . If the vessel is the respo nsible pa rty, it is requ ired to rem ain availab le to assis t the respective salvage and stranding network as needed.

All sea turtle species and their life stages are vulnerab le to the harm ful e ffects of oil through direct contact or by fouling of their food. Exposure to oil can be fa tal, particularly to juveniles and hatchlings. However, it is un likely that an accidental oil sp ill would occur from the proposed activities (refer to Item 5 , Water Quality). Oil sp ill response activities ma y increase vessel traffic in the area, which cou ld add to the possib ility of collisions with s ea tur tles. T he activitie s proposed in this plan will be covered by W oodsid e’s Regional Oil Spill Response Plan (refer to

information submitted in accordance with Appendix G ).

There are no other IPF s (including physical di sturbances to the seafloor) from the proposed activities which could impact sea turtles.

9. Air Quality

The projected air em issions id entified in Appe ndix G are not expected to affect the OCS air quality primarily due to distance to the shore or to any Prevention of Significant Deterioration Class I air quality area such as the Breton W ilderness Area. Walker Ridge Block 325 is beyond the 200 kilom eter (124 m ile) buffer for the Bret on Wilderness Area and is 155 m iles from the coastline. Therefore, n o special mitig ation, monitoring, o r reporting requirem ents apply with respect to air emissions.

Accidents and blowouts can rel ease hydrocarbons or chemicals, which could cause the em ission of air po llutants. However, these releases w ould not im pact onshore air quality because of the prevailing atmospheric conditions, em ission height , emission rates, and th e distance of W alker Ridge Block 325 from the coastline. There ar e no other IPFs (including effluents, physical disturbances to the seafloor, wa stes sent to shore for treatm ent or disposal) from the proposed activities which could impact air quality.

10. Shipwreck Sites (known or potential)

Potential IPFs that could im pact known or unknown shipwreck sites as a re sult of the proposed operations in Walker Ridge Block 325 in clude disturbances to the seafloor.Physical disturbances to the seafloor: A dy namically p ositioned se mi-submersible is being used for the proposed activ ities; therefore, only an insignificant am ount of seafloor will be disturbed. Because ph ysical distu rbances to the seafloor will be m inimized by the use of a dynamically positioned sem i-submersible, W oods ide’s proposed operations in W alker Ridge Block 325 would not cause impacts to shipwreck sites.

Additionally, Walker Ridge Block 325 is not located in or adjacen t to an OCS block designated by BOEM as having a high probability for occu rrence o f shipwreck s, therefore, no adverse impacts are expected.

Woodside will perform an ROV su rvey imaging 100% of the seafl oor with sector scanning sonar within a minimum 500’ radius of the proposed well location(s) prior to or upon commence ment of operations. These location s will be certif ied by an authorized m arine archaeologist and b y

Woodside to be clear of seafloor archaeological resources, includi ng historic shipwrecks. Copies of the certifications and a circle radius plat of the survey area will be submitted to the BOEMRE.

Should a resource be encountere d, Woodside will contact the BO EMRE immediately and make every reasonable effort to preserve a nd protect that cultural resource. .

There are no other IPF s (includi ng em issions, effluents, wastes sent to shore for treatm ent or disposal, or accidents) from the proposed activ ities which could impact shipwreck sites.

11. Prehistoric Archaeological Sites
Potential IP Fs that could cause im pacts to p reh istoric archaeological site s as a r esult of the proposed operations in Walker Ridge Block 32 5 include disturbances to the seafloor..

Physical disturbances to the seafloor: A dy namically p ositioned se mi-submersible is being used for the proposed activ ities; therefore, only an insignificant am ount of seafloor will be disturbed. Because ph ysical distu rbances to the seafloor will be m inimized by the use of a dynamically positioned sem i-submersible, W oods ide’s proposed operations in W alker Ridge Block 325 would not cause impacts to prehistoric archeological sites.

Additionally, W alker Ridge Bloc k 325 is located outside the Archaeological Prehistoric high probability line, therefore, no adverse impacts are expected.

Woodside will perform an ROV su rvey imaging 100% of the seafl oor with sector scanning sonar within a minimum 500’ radius of the proposed well location(s) prior to or upon commence ment of operations. These location s will be certif ied by an authorized m arine archaeologist and b y

Woodside to be clear of seafloor archaeological resources, includi ng historic shipwrecks. Copies of the certifications and a circle radius plat of the survey area will be submitted to the BOEMRE.

Should a resource be encountere d, Woodside will contact the BO EMRE immediately and make every reasonable effort to preserve a nd protect that cultural resource. .There are no other IPF s (includi ng em issions, effluents, wastes sent to shore for treatm ent or disposal, or accidents) from the proposed activitie s which could impact prehistoric archeological

sites.

Vicinity of Offshore Location

1. Essential Fish Habitat (EFH)

IPFs that could cause impacts to EFH as a result of the proposed operations in Walker Ridge

Block 325 include effluents and accidents. EFH includes all estuarine and m arine waters and

substrates in the Gu lf of Mexico.

Effluents: The Live Bottom Low Relief Stipula ti on, the Live Bottom (Pi nnacle Trend) Stipulation, and the Eastern Gulf Pinnacle Trend Stipulation would prevent most of the potential impacts on live -bottom comm unities and EFH f rom operationa l waste disch arges. Levels of contaminants in drillin g m uds and cutting s a nd produced-water discha rges, d ischarge-rate restrictions, and m onitoring a nd toxicity testing are regu lated by th e EPA NPDES perm it, thereby eliminating many significa nt biological or ecol ogical effects. Operat ional discharges are not expected to cause significant adverse impacts to EFH.

Accidents: An accid ental oil spill has the potential to cause some detrimental effects on EFH. Oil spills th at contact coastal bays and estuar ies, as well as OCS waters when pelagic eggs an d larvae are p resent, have the g reatest potential to a ffect fisheries. However, it is unlikely that an oil spill would occur from the proposed activities (refer to Item 5 , Water Quality). The activities proposed in this plan will be cov ered by W o odside’s Regional OSRP (refer to inform ation

submitted in Appendix G ).

There are no other IPFs (includi ng emissions, physical disturbances to the seafloor and wastes sent to shore for treatment or disposal) from th e proposed activities whic h could impact essential

fish habitat.

2. Marine and Pelagic Birds

IPFs that could im pact marine birds as a result of the proposed activities include air emissions, accidental oil spills, and discarded trash a nd debris from vessel s and the facilities.

Emissions: Em issions of pollutants into the a tmo sphere from these activ ities ar e f ar below

concentrations which could harm coastal and marine birds.

Accidents: An oil spill woul d cause localized, low-level petroleum hydrocarbon contamination. However, it is unlikely that an oil spill woul d occur from the proposed activities (refer to Item 5

, Water Quality). Marine and pelagic birds feedi ng at the spill loca tion may experience chronic, nonfatal, physiological stress. It is expected th at few, if any, coastal and m arine birds wouldactually be af fected to that exten t. The activ ities propo sed in th is plan will b e covered by Woodside’s Regional OSRP (refer to information submitted in Appendix G ).

Discarded trash and debris : Marine and pelagic birds could become entangled and snared i n discarded trash and debris, or in gest small plastic debris, which can cause permanent injuries and death. Operators are prohibited from deliberat ely discharging debris as mandated by MARPOLAnnex V and the Marine Plastic Pollution Resear ch and Control Act, and regulations imposed by various ag encies in cluding the United States Coast Guard (USCG) and the Environm ental Protection Agency (EP A). W oodside will op erate in accordance with the regu lations and also

avoid accidental loss of solid waste items by maintaining waste management plans, manifesting trash sent to shore, and using special precau tions such as co vering outside trash b ins to preven t accidental loss of solid waste. Special caution w ill be exercised when handling and d isposing of small items and packaging m aterials, par ticularly those m ade of non-biodegradable, environmentally pe rsistent m aterials such as plastic or gla ss. Inf ormational plac ards will b e posted on all vessels an d facilities having sleeping or food preparation capabilities. All offshore personnel, including contractors and other suppor t services-related pers onnel (e.g. helicopter pilots, vessel captains and boat cr ews) will be indoctrinated on wa ste procedures, and will view the video (or Microsoft PowerPoint presentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view th e marine trash and debris training vid eo annually. Offshore personnel w ill also receive an explanation fro m Woodside management or the designated lease operator m a nagement that emphasizes their commitment to waste management in accordance with NTL No . 2007-G03. Debris, if any, from these proposed

activities will s eldom intera ct with m arine an d pelagic b irds; th erefore, th e effects will b e negligible.

There are no other IPFs (including effluents, physical disturbances to the seafloor, or wastes sent to shore for treatm ent or disposal) from the pr oposed activities which could im pact marine and pelagic birds.

3. Public Health and Safety Due to Accidents.

There are no IPFs (em issions, effluents, physical disturbances to the seafloor, wastes sent to shore for treatm ent or disposal o r acciden ts, including an acciden tal H 2 S release ) f rom the proposed activities which could cau se impacts to public health a nd safety. In accordance with NTL No.’s 2008-G04, 2009-G27, and 2009-G31, suffi cient information is included in Appendix

C to justify our request that our proposed activities be classified by BOEM as H 2 S absent.

Coastal and Onshore

1. Beaches

IPFs from t he proposed activities that could cause im pacts to beaches include accidents (oil spills) and discarded trash and debris.Accidents: Oil spills co ntacting beaches would have impacts on the use of recreation al beaches

and associated resources. Due t o the dist ance from s hore (155 m iles) and the response capabilities that would be im plemented, no si gnificant ad verse im pacts are exp ected. The activities proposed in this plan will be c overed by W oodside’s Regional OSRP (refer to

information submitted in Appendix G ).

Discarded trash and debris: T rash on the beach is recogni zed as a m ajor th reat to the enjoyment and use of b eaches. Th ere will on ly be a lim ited amount of m arine debris, if any , resulting from the proposed activ ities. Operators are prohibite d from deliberately discharging debris as m andated by MARPOL- Annex V a nd th e Marine Plas tic Pollution Research and Control Act, and regulations im posed by variou s agencies includ ing the United State s Coas t Guard (USCG) and th e Environm ental Protecti on Agency (EPA). Woodside will op erate in accordance with the regulations and also avoi d acciden tal los s of solid waste item s by maintaining waste m anagement plans, m anifes ting trash sent to shore, and using special precautions such as covering outs ide trash bins to prevent accidental loss of solid waste. Special caution will be exercised when handling and dispos ing of sm all items and packaging m aterials, particularly those m ade of non- biodegradable, environm entally pe rsistent m aterials such as plastic or glass.

Informational placards will be pos ted on all vessels and facilities h aving sleeping or food preparation capabilities. All offshore personne l, including contract ors and other support services-related personnel (e.g. helicopter pilots, vessel capt ains and boat crews) will be indoctrinated on waste procedures, and will view the video (or Microsoft PowerPoint presentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view the marine trash and debris training video annually. Offshore personnel will also receive an explanation from Woodside m anagement or the d esignated lease operator m anagement th at em phasizes th eir co mmitment to waste m anagement in acco rdance

with NTL No. 2007-G03.

There are no other IPF s (em issions , effluents, physical disturbances to the seaflo or, or wastes sent to shore for treatment or disposal) from th e proposed activities which could impact beaches.

2. Wetlands

IPFs from t he proposed activities that could ca use im pacts to wetlands include accidents (oil spills) and discarded trash and debr is. However, it is un likely that an oil spill would occur from the proposed activities (refer to Item 5 , W ater Quality ). Due to the distance f rom shore (155 miles) and the response capabilities that woul d be im plemented, no im pacts are expected. The activities proposed in this plan will be c overed by W oodside’s Regional OSRP (refer to

information submitted in Appendix G ).

Accidents: Oil spills contacting wetlands would have impacts on the salt m arshes and seagrass beds tha t f ringe the co astal are as of the Gulf of Mexico. Due to the distance from shore (155miles) and the response capab ilities that would be im plemented, no significant adverseimpacts are expected. The activ ities propos ed in this plan will be covered by Woodside’s Regional OSRP (refer to information submitted in Appendix G ).

Discarded trash and debris: There will only be a lim ited a mount of m arine debris, if any, resulting from the proposed activ ities. Operators are prohibite d from deliberately discharging debris as m andated by MARPOL- Annex V a nd th e Marine Plas tic Pollution Research and Control Act, and regulations im posed by variou s agencies includ ing the United States Coas t Guard (USCG) and th e Environm ental Protecti on Agency (EPA). Woodside will op erate in accordance with the regulations and also avoi d acciden tal los s of solid waste item s by maintaining waste m anagement plans, m anifes ting trash sent to shore, and using special precautions such as covering outs ide trash bins to prevent accidental loss of solid waste. Special caution will be exercised when handling and dispos ing of sm all items and packaging m aterials, particularly those m ade of non- biodegradable, environm entally pe rsistent m aterials such as plastic or glass.

Informational placards will be pos ted on all vessels and facilities h aving sleeping or food preparation capabilities. All offshore personne l, including contract ors and other support services-related personnel (e.g. helicopter pilots, vessel capt ains and boat crews) will be indoctrinated on waste procedures, and will view the video (or Microsoft PowerPoint presentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view the marine trash and debris training video annually. Offshore personnel will also receive an explanation from Woodside m anagement or the d esignated lease operator m anagement th at em phasizes th eir co mmitment to waste m anagement in acco rdance

with NTL No. 2007-G03.

There are no other IPF s (em issions , effluents, physical disturbances to the seaflo or, or wastes sent to shore for treatm ent or disposal) fr om the proposed activities which could im pact

wetlands.

3. Shore Birds and Coastal Nesting Birds

Potential IPFs from the proposed activities that could cause im p acts to shore birds and coastal nesting birds include accidents (oil spills) and discarded trash and debris.

Accidents: Oil spills could cause impacts to shore birds and coastal nest ing birds. However, it is unlikely that an oil spill would occur from the proposed activities (refer to Item 5 , W ater Quality). Given the distance from shore (155 miles ) and the response capabilities th at would be implemented, no significant adverse im pacts are expect ed. The activities proposed in this plan will be covered by Woodside’s Regional OSRP (refer to information submitted in Appendix G ).

Discarded trash and debris: Coastal and m arine birds are highly susceptible to entanglem ent in floating, submerged, and beached marine debris : specifically plastics. Operators are prohibited from deliberately discharging debris as m anda ted by MARPOL-Annex V and the Marine PlasticPollution Research and Control Ac t, and regulations im posed by va rious agencies in cluding the United States Coast Guard (USCG) and the Envi ronmental Protection Agency (EPA). Woodside will op erate in acco rdance with th e regu lations a nd also avoid a ccidental los s of solid waste items by maintaining waste management plans, mani festing trash sent to shore, and using special precautions such as covering outside trash bins to pr event accidental loss of solid waste. Special caution will be exercised when handling and dispos ing of sm all items and packaging m aterials, particularly those m ade of non- biodegradable, environm entally pe rsistent m aterials such as plastic or glass.

Informational pla cards will be pos ted on vesse ls and eve ry f acility th at has sleeping or f ood preparation capabilities. All offshore personne l, including contract ors and other support services-related personnel (e.g. helicopter pilots, vessel capt ains and boat crews) will be indoctrinated on waste procedures, and will view the video (or Microsoft PowerPoint presentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view the marine trash and debris training video annually. Offshore personnel will also receive an explanation from Woodside m anagement or the d esignated lease operator m anagement that em phasizes their commi tment to waste m anagement in acco rdance

with NTL No. 2007-G03.

There are no other IPF s (em issions , effluents, physical disturbances to the seaflo or, or wastes sent to shore for treatm ent or disposal) from th e proposed activities that could cause im pacts to shore birds and coastal nesting birds.

4. Coastal Wildlife Refuges

Potential IPFs from the proposed activities that could cause im pacts to coastal wildlife refuges include accidents (oil spills) and discarded trash and debris.

Accidents: An acciden tal oil spill from the proposed activities could cause im pacts to co astal wildlife refuges. However, it is unlikely that an oil spill would occur from the proposed activities (refer to Item 5 , Water Quality). Due to th e distance from shore (155 m iles) and the response capabilities that would be im plemented, no sign ificant adv erse im pacts are expec ted. The activities proposed in this plan will be c overed by W oodside’s Regional OSRP (refer to

information submitted in Appendix G ).

Discarded trash and debris: Entanglement in floating, submerged, and beached marine debris: specifically plastics could impact inhabitants of coastal wildlife refuges. Operators are prohibited from deliberately discharging debris as m anda ted by MARPOL-Annex V and the Marine Plastic

Pollution Research and Control Ac t, and regulations im posed by va rious agencies including the United States Coast Guard (USCG) and the Envi ronmental Protection Agency (EPA). Woodside will op erate in acco rdance with th e regu lations a nd also avoid a ccidental los s of solid waste items by maintaining waste management plans, mani festing trash sent to shore, and using special precautions such as covering outside trash bins to pr event accidental loss of solid waste. Special caution will be exercised when handling and dispos ing of sm all items and packaging m aterials,particularly those m ade of non- biodegradable, environm entally pe rsistent m aterials such as plastic or glass.

Informational plac ards will be posted on vesse ls and ever y f acility th at has sle eping or f ood preparation capabilities. All offshore personne l, including contract ors and other support services-related personnel (e.g. helicopter pilots, vessel capt ains and boat crews) will be indoctrinated on waste procedures, and will view the video (or Microsoft PowerPoint presentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view the marine trash and debris training video annually. Offshore personnel will also receive an explanation from Woodside m anagement or the d esignated lease operator m anagement that em phasizes their commi tment to waste m anagement in acco rdance

with NTL No. 2007-G03.

There are no other IPF s (em issions , effluents, physical disturbances to the seaflo or, or wastes sent to shore for treatm ent or disposal) from th e proposed activities that could cause im pacts to coastal wildlife refuges.

5. Wilderness Areas

Potential IPFs from the proposed activities that could cause im pacts to wilderness areas include accidents (oil spills) and discarded trash and debris.

An accidental oil spill from the proposed activiti es could cause im pacts to wilderness areas. However, it is unlikely that an oil spill woul d occur from the proposed activities (refer to Item 5

, Water Quality). Due to the distance from the nearest designated wild erness area (> 100 m iles) and the response capabili ties that would be implem ented, no significant adverse im pacts are expected. T he activities proposed in this plan will b e covered by Woodside’s Regional OSRP (refer to information submitted in Appendix G).

Discarded trash and debris: Entanglement in floating, submerged, and beached marine debris: specifically plastics could im pact inhabitants of wilderness areas. Operators are proh ibited from deliberately discharging debr is as m andated by MARPOL-Annex V and the Marine Plastic

Pollution Research and Control Ac t, and regulations im posed by va rious agencies including the United States Coast Guard (USCG) and the Envi ronmental Protection Agency (EPA). Woodside will op erate in acco rdance with th e regu lations a nd also avoid a ccidental los s of solid waste items by maintaining waste management plans, mani festing trash sent to shore, and using special precautions such as covering outside trash bins to pr event accidental loss of solid waste. Special caution will be exercised when handling and dispos ing of sm all items and packaging m aterials, particularly those m ade of non- biodegradable, environm entally pe rsistent m aterials such as plastic or glass.

Informational plac ards will be posted on vesse ls and ever y f acility th at has sle eping or f ood preparation capabilities. All offshore personne l, including contract ors and other support services-related personnel (e.g. helicopter pilots, vessel capt ains and boat crews) will be indoctrinated on waste procedures, and will view the video (or Microsoft PowerPointpresentation), “Think About It” ( previously “All Washed Up: The Beach Litter Problem” ). Thereafter, all personnel will view the marine trash and debris training video annually. Offshore personnel will also receive an explanation from Woodside m anagement or the d esignated lease operator m anagement that em phasizes their commi tment to waste m anagement in acco rdance

with NTL No. 2007-G03.

There are no other IPF s (em issions , effluents, physical disturbances to the seaflo or, or wastes sent to shore for treatm ent or disposal) from th e proposed activities that could cause im pacts to

wilderness areas.

6. Other Environmental Resources Identified

(C) Impacts on your proposed activities

The site–specific environm ental conditions have been taken into account for the proposed activities. No i mpacts are expected on the propos ed activities from site-specific environm ental

conditions.

(D) Environmental Hazards
During the hurricane season, June through Novem ber , the Gulf of Mexico is im pacted by an average of ten tropical storm s (39-73 mph winds), of which si x become hurricanes ( > 74 m ph winds). Due to its location in the gulf, W alker Ridge Block 325 may experience hurricane and tropical storm force wi nds, and related sea curr ents. Thes e factors can adverse ly impact the integrity of the operations covered by this pla n. A significant storm may present physical hazards to operators and vessels, damage exploration or pr oduction equipment, or result in the release of hazardous materials (including hydrocarbons). Add itionally, the displacement of equipment may disrupt the local benthic habitat a nd pose a threat to local species.

The following preventative measures included in this plan may be implemented to mitigate these impacts:

1. Drilling

a. Secure well

b. Secure rig / platform

c. Evacuate personnel

Drilling activities will be conducted in accordance with NTL No.’s 2008-G09, 2009-G10, and

2010-N10.

2. Structure Installation Operator will not conduct structure instal lation operations duri ng Tropical Storm or

Hurrican e threat.(E) Alternatives

No alternatives to the proposed activities were cons idered to reduce environmental impacts.

(F) Mitigation Measures

No m itigation m easures other than those requ ired by regu lation will be em ployed to avoid, diminish, or eliminate potential im pacts on environmental resources.

(G) Consultation

No agencies or persons were consulted regard ing potential impacts associ ated with the proposed activities. Therefore, a list of such entities has not been provided.

(H) Preparer(s)

Matt Harlan J. Connor Consulting, Inc. 16225 Park Ten Place, Suite 700 Houston, TX 77084 (281) 578-3388 matt.harlan@jccteam.com

(I) References

Authors:

American Petro leum Institu te (API). 1989. Eff ects of offshore petroleum operatio ns on cold

water m arine m ammals: a literature revi ew. W ashington, DC: Am erican Petroleum Institute. 385 pp.

Balazs, G.H. 1985. I mpact of ocean debris on m ari ne turtles: entang lement and ingestion. In : Shomura, R.S. and H.O. Yoshida, eds. Proceed ings, W orkshop on the Fate and Im pact of Marine Debris, 26-29 Nove mber 1984, Hono lu lu, HI. U.S. Dept. of Co mmerce. NOAA Tech. Memo. NOAA-TM-NMFS-SWFC-54. Pp 387-429.

Burke, C.J. and J.A. Veil. 1995. Potential benef its from regulatory cons ideration of synthetic drilling m uds. Environm ental Assessm en t Division, Argonne Na tional Laboratory,

ANL/EAD/TM-43

Daly, J.M. 1997. Controlling the discharge of synthetic-based drilling fluid contam inated cuttings in waters of th e United States. U. S. Environm ental Protection Agency, Office of Water. Work Plan, June 24, 1997.

Hansen, D.J. 198l. The relative sens itivity of seabird populations in Al aska to oil pollution. U.S. Dept. of the Interior, Bureau of Land Mana gement, Alaska OCS Region, Anchorage. BLMYK-ES-81-006-1792.Laist, D.W . 1997. Im pacts of m arine debris: en tanglement of m arine life in m arine debris including a comprehensive list of species with entanglement and ingestion records. In: Coe, J.M. and D.B. Rogers, eds. Marine debris: s ources, impacts, and solutions. New York, NY: Springer-Verlag. Pp. 99-139

Majors, A.P. and A.C. Myrick, Jr. 1990. Effects of noise on animals: implications for dolphins exposed to seal bom bs in the eastern tropi cal Pacific purse-sein e fishery–an annotated bibliography. NOAA Admini strative Report LJ-90-06.

Marine Mammal Commission. 1999. A nnual report to Congress – 1998

Piatt, J.F., C.J. Lensink, W . Butler, M. Ke ndziorek, and D.R. Nysewander. 1990. Imm ediate impact of the Exxon Valdez oil spill on marine birds. The Auk. 107 (2): 387-397

Vauk , G., E. Hartwig, B. Reineking, and E. Vauk-Hentzelt. 1989. L osses of seabirds by oil pollution at the German North Sea coast. Topics in Marine Biology. Ros, J.D, ed. Scient. Mar. 53 (2-3): 749-754

Vermeer, K. and R. Vermeer, 1975 Oil threat to birds on the Canadian west coast. The Canadian

Field-Naturalist. 89:278-298.

Although not cited, the following were utilized in prepar ing this EIA:

• Hazard Surveys

• BOEM EIS’s:

o GOM Deepwater Operations and Activities. Environm ental Assessm ent. BOEM 2000-

001

o GOM Central and W estern Planning Areas Sales 166 and 168 Final Environm ental Impact Statement. BOEM 96-0058