Apache Deepwater LLC Page F-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 

### APPENDIX F
WASTES AND DISCHA RGES INFORMATION

(A) PROJECTED GENERATED WASTES Table 1, “ Wastes You Will Generate, Treat and Downhole Dispose or Discharge to the GOM”

is included in this section as Attachment F-1.Please specify if the amount reported is a total or per well amount.

Type of Waste Composition Projected Amount Discharge rate Discharge Method Answer yes or

no Will drilling occur ? If yes, you should list muds and cuttings

EXAMPLE: Cuttings wetted with synthetic

based fluid Cuttings generated while using synthetic based drilling fluid. X bbl/well X bbl/day/well discharge overboard No

Spent Drilling Fluids Synthetic-based drilling

muds 6,045 NA Re-use in mud system. No

Spent Drilling Fluids Water based drilling fluid 37,763 31,645 Discharged at mudline prior to BOP and riser

installation No

Washed Cuttings from water based hole

interval Cuttings coated with water based drilling mud 2,079 1,742 Discharged at mudline prior to BOP and riser

installation No

Washed Drill cuttings from synthetic based hole interval Drill cuttings 3,400 50 Treated using solids control equipment and discharged overboard using shunt line No

Synthetic based drilling fluid adhering to washed drill cuttings Synthetic based drilling

fluid 136 4.50 Shunt through a downpipe to 25’ below

the water’s surface No Will humans be there? If yes, expect conventional waste

EXAMPLE: Sanitary waste water Sanitary waste from living
quarters X bbl/well X bbl/hr/well chlorinate and discharge

overboard No

Sanitary Waste Treated human body waste

from toilets 4,579 3.6 USCG approved MSD No

Domestic Waste Gray water (laundry, galley, lavatory) 11,321 8.900 Discharged overboard. Any associated food waste will be processed using an approved grinder. No Is there a deck? If yes, there will be Deck Drainage

Deck Drainage Platform washings and

rainwater 12,720 10 bbls/hr (depend on

rainfall ) Oily water is treated in Oily Water Separator No Will you conduct well treatment, completion, or workover? If yes, only fill in those associated with your activity.

Well treatment fluids NA NA NA NA NA

Well completion fluids Brine, spent acid, prop

sand and debris 3,000 bbls/well 750 bbl/hr maximum Discharged overboard No

Workover fluids NA NA NA NA NA Miscellaneous discharges. If yes, only fill in those associated with your activity.

Desalination unit brine water Rejected water from water

maker unit 21,200 gal 400 gal/day Cuttings Chute No

Blowout prevent fluid Stackmagic 200/0/5% glycol based on 2% mixture with potable water 71.4 bbls 1.7 bbls/day Discharged from BOP

near mudline No

Ballast water Uncontaminated seawater used to maintain proper

draft 185,500 3,500 bbls/day Discharged overboard No

Excess cement Cement slurry 657 657 bbls/day Discharged at the mudline during cementing conductor casing. No

Firewater Bypass Seawater with no addition

of chemicals 6,921 kbbls 130,600 bbls/day Discharged overboard No

Cooling water Seawater with no addition

of chemicals 6,921 kbbls 130,600 bbls/day Discharged overboard No Will you produce hydrocarbons? If yes fill in for produced water.

Produced water Formation water N/A N/A N/ A No Will you be covered by an individual or general NPDES permit ? General TABLE 1. WASTES YOU WILL GENERATE, TREAT AND DOWNHOLE DISPOSE OR DISCHARGE

TO THE GOM

Projected

Downhole Disposal Projected generated waste Projected ocean discharges

NOTE: If you will not have a type of waste, enter NA in the row.Apache Deepwater LLC Page G-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 

### APPENDIX G
AIR EMISSIONS INFORMATION

(A) EMISSIONS WORKSHEETS AND SCREENING QUESTIONS

Screen Procedures for EP’s Yes No Is any calculated Complex Total (CT) Emis sion amount (tons) associated with your proposed exploration activities more than 90% of the amounts calculated using the following formulas: CT = 3400D 2/3 for CO, and CT = 33.3D for the other air pollutants (where D = distance to shore in miles)? x

Do your emission calculations include any emission reduction measures or modified
emission factors? x

Are your proposed exploration activities located east of 87.5° W longitude? x Do you expect to encounter H 2 S at concentrations greater than 20 parts per million (ppm)? x Do you propose to flare or vent natural gas for more than 48 continuous hours from any proposed well? x

Do you propose to burn produced hydrocarbon liquids? x

There are no existing facilities or activities co -located with the currently proposed activities, therefore the Complex Total Emissions are the sa me as the Plan Emissi ons and are provided in
the table below.

Air Pollutant Plan
Emission
Amounts 1
(tons) Calculated Exemption
Amounts 2
(tons) Calculated Complex Total
Emission
Amounts 3
(tons) Carbon Monoxide (CO) 274.41 87251.82 274.41 Particular matter (PM) 36.68 4329.00 36.68 Sulphur dioxide (SO 2 ) 167.78 4329.00 167.78 Nitrogen oxides (NO

x ) 1257.71 4329.00 1257.71 Volatile organic compounds (VOC) 37.84 4329.00 37.84

1 For activities proposed in your EP , list the projected emissions ca lculated from the worksheets.

2 List the exemption amounts for your pr oposed activities calculat ed by using the formulas in 30 CFR 250.303(d).

3 List the complex total emissions associated with y our proposed activities calcul ated from the worksheets.

This information was calculated by: Judy Davidson
281.578.3388 Judy.davidson@jccteam.comApache Deepwater LLC Page H-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 

### APPENDIX H
OIL SPILLS INFORMATION

(A) OIL SPILL RESPONSE PLANNING Apache Deepwater LLC (BOEM Operator Number 03165) Regional Oil Spill Response Plan (OSRP) was submitted on August 26, 2011 and most recently updated on September 1, 2011. All proposed activities and facilities in this EP will be covered by the Regional OSRP in accordance with 30 CFR 254.

(B) SPILL RESPONSE SITES Primary Response Equipment Location Preplanned Staging Location Houma, Louisiana Houma, Louisiana Fourchon, Louisiana

(C) OSRO INFORMATION Apache Deepwater’s primary equipment provider is Clean Gulf Associates (CGA). The Marine Spill Response Corporation’s (MSRC) STARS network will provide closest available personnel, as well as an MSRC supervisor to operate the equipment.

(D) WORST-CASE SCENARIO COMPARISON

Category Regional OSRP

WCD EP
WCD

Type of Activity Exploratory Exploratory

Facility Location (Area/Block) GC 867 GC 867

Facility Designation D D

Distance to Nearest Shoreline (miles) 133 133

Volume Storage Tanks (Total)
Uncontrolled blowout
Total Volume 166,525 166,525

Type of Oil(s) (crude, condensate, diesel) Crude Crude

API Gravity 30 30

Apache Deepwater has determined that the worst-case scenario from the activities proposed in this EP does supersede the worst-case scenario from our approved Regional OSRP. Apache Deepwater’s OSRP was revised to indicate the new worst-case discharge and submitted for approval on September 1, 2011. Apache Deepwater’s OSRP Certification Letter was approved on September 8, 2011.

As a member of CGA, Apache Deepwater has the capability to respond, to the maximum extent practicable, to a worst-case discharge, or a substantial threat of such a discharge, resulting from the activities proposed in this

EP.

Explanation Of The Selection Of Reservoirs Used To Determine WCDApache Deepwater LLC Page H-6 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Included as Attachment H-2 is Nodal Analysis data.

SPILL RESPONSE DISCUSSION For the purpose of NEPA and Coastal Zone Management Act analysis, the largest spill volume originating from the proposed activity would be a we ll blowout during drilling operations, estimated to be 166,525 barrels of crude oil with an API gravity of 30°.

Land Segment and Resource Identification Trajectories of a spill and the prob ability of it impacting a land segm ent have been projected utilizing information in the BOEM Oil Spill Risk Analysis Model (OSRAM) for the Central and Western Gulf of
Mexico available on the BOEM webs ite. The results are shown in Figure 1. The BOEM OSRAM identifies a 3% probability of impact to the shor elines of Cameron Parish and/or Plaquemines Parish, LA within 30 days.
Cameron Parish includes the east side of Sabine La ke, Sabine National Wildlif e Refuge, Calcasieu Lake, Lacassine National Wildlife Refuge (i nland) and Grand Lake. Cameron Pa rish also includes the area along the coastline from Sabine Pass to Big Constance Lake in Ro ckefeller Wildlife Refuge. Th is region is composed of open public beaches, marshlands and swamps. It serves as a habitat for numerous birds, finfish and other animals, including several rare, threat ened and endangered species. Plaquemi nes Parish includes Barataria Bay, the Mississippi River Delta, Breton Sound and the affiliat ed islands and bays. This region is an extremely sensitive habitat and serves as a migratory, breeding, feeding and nursery habitat for numerous species of
wildlife. Beaches in th is area vary in grain pa rticle size and can be classified as fine sand, shell or perched shell beaches. Sandy and muddy tidal flats are also abundant.

ResponseApache Deepwater LLC Page H-7 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Apache Deepwater LLC will make every effort to res pond to the Worst Case Discharge as effectively as practicable. A description of the response equipment under c ontract to contain and recover the Worst Case Discharge is shown in Figure 2.

Using the estimated chemical and physical characteristic s of crude oil, an ADIOS weathering model was run on a similar product from the ADIOS oil database. The resu lts indicate 12% or 19,983 ba rrels of crude oil would be evaporated/dispersed within 24 hours, with 146,542 barrels remaining.

Spill Response GC 867 Barrels of Oil

WCD Volume 166,525

Less 12% natural evaporation/dispersion 19,983

Remaining volume 146,542

Oil addressed by aerial dispersants 7,540

Oil addressed by in-situ burning 7,327

Figure 2 outlines equipment, personnel, materials and suppor t vessels as well as temporary storage equipment available to respond to a spill of 166,525 barrels. The list estimates individua l times needed for procurement, load out, travel time to the site and deployment. Figure 2 also indicates how operations will be supported.

If aerial dispersants are utilized, 8 sorties (9,600 gallons ) from two of the DC-3 aircrafts and 4 sorties (8,000 gallons) from the Basler aircraft sh ould disperse approximately 7,327 barrels of product. If the conditions are favorable for in-situ burning, the proper approvals have been obtained and the proper planning is in place, insitu burning of oil may be attempted. Using estimate s based on the Deepwater Hori zon spill of 2010, up to 5% or 6,437 barrels of the tota l daily Worst Case Discha rge volume could be burne d. Slick containment boom would be immediately called out and on-scene as soon as possible. Offs hore response strategies may include attempting to skim utilizing the HOSS Barge, nine Fast Response Units, two Aqua Guard Triton RBS skimmers, and eleven sets of Koseq skimming arms, w ith a total derated skimmi ng capacity of 318,609 barrels. Temporary storage associated with skimming equipment equals 31,700 barrels. If additional storage is needed, an 80,000 barrel storage barge, an 83,937 barrel storag e barge, an 86,948 barrel storage barge, and a 107,285 barrel storage barge may be mobilized and centrally located to provide temporary storage allowing the skimmers 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, shoreline impact in Cameron Parish, Loui siana and/or Plaquemines Cameron Parish, Louisiana would depend upon existing environmental condi tions. Shoreline protection would include the use of
CGA’s near shore and shallow water skimmers with a totaled derated skimming capacity of 54,753 barrels. Temporary storage associated with sk imming equipment equals 1,861 barrels. If additional storag e is needed, an 86,948 barrel storage barge may be mobilized and centrally located to provide tem porary storage allowing the skimmers to stay in the ar ea of operations as much as possible. Onshore response may include the deployment of shoreline boom on beach areas, or protection and sorbent boom on vegetated areas. Master Service Agreements with Oil Mop, AMPOL, and USES will ensu re access to 160,000 feet of 18” shoreline protection
boom. Figure 2 outlines individual times needed for procurem ent, load out, travel time to the site and deployment. Strategies would be base d upon surveillance and real time trajecto ries that depict areas of potential impact given actual sea and weather conditions. The St ate of Louisiana Initial Oil Spill Response Plan for Cameron Parish, Plaquemines Parish, and Unified Comman d would be consulted to ensure that environmental and special economic resources would be correctly identi fied and prioritized to en sure optimal protection. Shoreline protection strategies depict the protection response modes appli cable for oil spill clean-up operations. The State of Louisiana Initial Oil Spill Response Plan prov ides detailed shoreline protection strategies for this area, and it describes necessary action to keep the oil spill from entering Louisiana’s coastal wetlands, based onApache Deepwater LLC Page H-8 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) the assumption that removal of the released oil will be much easier and less damaging to fragile coastal ecosystems if done in the open waters of the Gulf of Mexico. Supervisory personnel have the option to modify the deployment and operation of equipment allowing a more effective response to site -specific circumstances. Apache Deepwater LLC’s contract Spill Management Team holds a copy of the State of Louisiana Initial Oil Spill Response Plan.

Initial Response Considerations Actual actions taken during an oil sp ill 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

Apache Deepwater LLC will take action to provide a safe, aggressive re sponse to contain and recover as much of the spilled oil as quickly as it is sa fe to do so. In an effort to protect the environment, response actions will be designed to provide an “in-depth” pr otection 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 situation and coordinated objectives

o Areas of responsibility established for Sour ce Control and each su rface 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 m ovement by remote sensing system s, aerial photography and visual
confirmation

• Continual monitoring of vessel assets using vessel monitoring systemsApache Deepwater LLC Page H-9 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Dispersant application assets

• Put ASI on standby

• With the FOSC, conduct analysis to determin e appropriateness of di spersant 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

T&T Koseq Skimming Systems

• To the area of the thickest oil

• Use as far off-shore as allowed

• VOOs with a minimum of 2,000 bbls storage capacity

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 ti me as skimming systems

• Position as closely as possible to ski mming assets to minimize offloading timeApache Deepwater LLC Page H-10 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Vessels of Opportunity (VOO)

• Use Apache Deepwater LLC’s contr acted 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-sit u burn operation 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 plan

Near Shore Response Actions

Timing

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

• VOO identification and training in advance of spill nearing sh oreline 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 move ment 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 shor e 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

• FRVsApache Deepwater LLC Page H-11 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) • Egmopol and Marco SWS

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

VOO

• Use Apache Deepwater LLC’s contr acted 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 patchesApache Deepwater LLC Page H-12 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Shoreline Protection Operations

Response Planning Considerations

• Environmental risk assessments (ERA) to determine priorities 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 (Feb 2011) for Louisiana, The State of Lo uisiana 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 th e 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 response 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 areasApache Deepwater LLC Page H-13 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Decanting Strategy Recovered oil and water mixtures will typically separate into distinct phases when left in a quiescent state. When separation occurs, the relatively clean water phase can be siphoned or decanted back to the recovery point with minimal, if any, impact. Decan ting therefore increases the effectiv e on-site oil storage capacity and equipment operating time. FOSC/SOSC approval will be re quested prior to decanting operations. This practice is routinely used for oil spill recovery.

CGA Equipment Limitations The capability for any spill response equipment, whether a dedicated or portable system, to operate in differing weather conditions will be directly in relation to the capabili ties of the vessel the syst em in placed on. Most importantly, however, the decision to operate will be ba sed on the judgment of the Unified Command and/or the Captain of the vessel, who will ultimately have the final say in terminating operations. Skimming equipment listed below may have operational limits which exceed thos e safety thresholds. As was seen in the Deepwater Horizon (DWH) oil spill response, vessel skimming operati ons ceased when seas reached 5-6 feet and vessels were often recalled to port when those conditions were exceeded. Systems below are some of the most up-todate 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 seas

Environmental Conditions in the GOM
Louisiana is situated between the east erly and westerly wind belts, and therefore, experiences westerly winds during the winter and easte rly winds in the summer. Average wind speed is generally 14-15 mph along the coast. Wave heights 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 leve l, flooding is prominent.

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

The Atlantic and Gulf of Mexico hurricane season is offi cially from 1 June to 30 November. 97% of all tropical activity occurs within th is window. The Atlantic basin shows a ve ry peaked season from August through October, with 78% of the tropical storm days, 87% of the minor (Saffir-Simpson Scale categories 1 and 2) hurricane days, and 96% of the major (Saffir-Simpson categories 3, 4 and 5) hurri cane days occurring then. Maximum activity is in early to mid Se ptember. Once in a few years there ma y be a hurricane occurring "out of season" - primarily in May or Dece mber. Globally, September is the most active month and May is the least
active month.Apache Deepwater LLC Page H-14 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) FIGURE 1
TRAJECTORY BY LAND SEGMENT

Trajectory of a spill and the probability of it impacting a land segment have been projected utilizing Apache Deepwater LLC’s WCD and in formation in the BOEM Oil Spill Risk Analysis Model (OSRAM) for the Central and Western Gulf of Mexico available on the BOEM 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

Green Canyon 867

D

133 miles from shore G33858 C46 Matagorda County, TX Brazoria County, TX Galveston County, TX Jefferson County, TX Cameron Parish, LA Vermilion Parish, LA Terrebonne Parish, LA Lafourche Parish, LA Plaquemines Parish, LA 1

1

2

1
3

1

1

1
3Apache Deepwater LLC Page H-15Joint Initial Exploration Plan June, 2011Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)WCD Scenario– BASED ON WELL BLOWOUT DURING DRILLING OPERATIONS(133 miles from shore)166,525 bbls of crude oilAPI Gravity 30°FIGURE 2 – Equipment Response Time to GC 867, DDispersants/SurveillanceDispersant/SurveillanceDispersantCapacity (gal)StorageCapacityPersonsReq.From Hrs to ProcureHrs toLoadoutTravel tositeTotal HrsCGABasler 67T 2000 NA 2 Houma 1 1 0.9 2.9ASIDC 3 1200 NA 2 Houma 1 1 1.1 3.1DC 3 1200 NA 2 Houma 1 1 1.1 3.1Aero Commander NA NA2 Houma 1 1 0.9 2.9Offshore ResponseOffshore Equipment NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsCGAHOSS Barge 43000 4000 3 Tugs 8 Houma 4 0 5 16.3 1 26.3T&T Marine (available through contract with CGA)Koseq Skimming Arms (3) 53487 6000 3 Utility 18 Leeville 4 12 1 10.8 2 29.8Koseq Skimming Arms (2) 35658 4000 2 Utility 12 Venice 4 12 1 10.8 2 29.8Koseq Skimming Arms (1) 17829 2000 1 Utility 6 Fourchon 4 12 1 10.8 2 29.8Koseq Skimming Arms (5) 89145 10000 5 Utility 30 Galveston 4 12 1 25 2 44Recovered Oil Storage NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsK-Sea Operating (available through contract with CGA)PACIFIC 996165 NA 80000 1 Tug 6 Venice 4 12 4 16.25 1 37.25DBL 76 1212984 NA 83937 1 Tug 6 Venice 4 12 4 16.25 1 37.25DBL 81 1132231 NA 86948 1 Tug 6 Venice 4 12 4 16.25 1 37.25DBL 101 1119760 NA 107285 1 Tug 6 Venice 4 12 4 16.25 1 37.25Apache Deepwater LLC Page H-16Joint Initial Exploration Plan June, 2011Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)Staging Area: FourchonOffshore Equipment WithStagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toSiteHrs toDeployTotalHrsCGAFRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Belle Chasse 1 2 2.5 10.8 1 17.3FRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Galveston 1 2 7 10.8 1 21.8FRU (3) + 100 bbl Tank (5) 11310 500 1 Utility 6 Houma 1 2 1 10.8 1 15.8FRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Ingleside 1 2 9.5 10.8 1 24.3FRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Lake Charles 1 2 4 10.8 1 18.8FRU (2) + 100 bbl Tank (4) 7540 400 1 Utility 6 Venice 1 2 4 10.8 1 18.8Aqua Guard Triton RBS (2) 45560 4000 2 Utility 12 Galveston 4 12 7 10.8 2 35.8Offshore Equipment WithStagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toSiteHrs toDeployTotalHrsCGA42” Auto Boom (5000’) NA NA 10 Crew20 Belle Chasse 1 2 2.5 10.8 1 17.342” Auto Boom (5000’) NA NA 10 Crew 20 Galveston 1 2 7 10.8 1 21.842” Auto Boom (5000’) NA NA 10 Crew 20 Houma 1 2 1 10.8 1 15.842” Auto Boom (2500’) NA NA 6 Crew 12 Ingleside 1 2 9.5 10.8 1 24.342” Auto Boom (5000’) NA NA 10 Crew20 Lake Charles 1 2 4 10.8 1 18.842” Auto Boom (2500’) NA NA 6 Crew 12 Pascagoula 1 2 4 10.8 1 18.81000’ Hydro-Fire Boom(In-Situ)NA NA 8 Utility 40 Harvey1 4 2.75 10.8 6 24.55Apache Deepwater LLC Page H-17Joint Initial Exploration Plan June, 2011Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)Nearshore ResponseNearshore Equipment NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsCGA46’ FRV 5000 65 NA 4 Galveston 1 0 0 3.2 0 4.246’ FRV 5000 65 NA 4 Houma 1 0 2 3.2 0 6.246’ FRV 5000 65 NA 4 Lake Charles 1 0 1 2 0 446’ FRV 5000 65 NA 4 Venice 1 0 1 2 0 4Trinity SWS 21500 249 NA 4 Morgan City 1 2 2 4.8 1 10.8K-Sea Operating (available through contract with CGA)DBL 82 1137538 NA 86948 1 Tug 6 Venice 4 12 4 6.25 1 27.25Staging Area: FourchonNearshore and InlandSkimmers With StagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadOutTravel toStagingTravel toDeploymentSiteHrs toDeployTotalHrsCGASWS Egmopol 3000 100 NA 3 Galveston 1 2 7 2 0 12SWS Egmopol 3000 100 NA 3 Houma 1 2 1 2 0 6SWS Marco 3588 34 NA 3 Houma 1 2 1 2 0 6SWS Marco 3588 20 NA 3 Lake Charles 1 2 4 2 0 9Rope Mop 77 2 0 3 Belle Chasse 1 2 2.5 2 0 7.5RO Storage Barge NA 249 Towed 0 Galveston 1 2 7 2 0 12RO Storage Barge NA 249 Towed 0 Houma 1 2 1 2 0 6RO Storage Barge NA 249 Towed 0 Lake Charles 1 2 4 2 0 9RO Storage Barge NA 249 Towed 0 Venice 1 2 4 2 0 9Apache Deepwater LLC Page H-18Joint Initial Exploration Plan June, 2011Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)Shoreline ProtectionStaging Area: CameronShoreline Protection Boom VOOPersonsReq.Storage/WarehouseLocationHrs toProcureHrs toLoadOutTravel toStagingTravel toDeployment SiteHrs to Deploy Total HrsUSES (available through MSA)6000’ 18” Boom 5 Crew 14 Meraux, LA .5 .5 4.75 2 2 9.755000’ 18” Boom 3 Crew 8 Mobile, AL .5 .5 6 2 2 111000’ 18” Boom 1 Crew 3 Geismar, LA .5 .5 3.5 2 1 7.54500’ 18” Boom 3 Crew 8 Houston, TX .5 .5 2.5 2 2 7.54000’ 18” Boom 2 Crew 6 Venice, LA .5 .5 6.25 2 2 11.252000’ 18” Boom 1 Crew 3 Jackson, MS .5 .5 5.75 2 1 9.752000’ 18” Boom 1 Crew 3 Southaven, MS .5 .5 8.75 2 1 12.751000’ 18” Boom 1 Crew 3 Nashville, TN .5 .5 12.25 2 1 16.251500’ 18” Boom 1 Crew 3 Birmingham, AL .5 .5 9.25 2 1 13.251000’ 18” Boom 1 Crew 3 Biloxi, MS .5 .5 5.5 2 1 9.5Staging Area: FourchonShoreline ProtectionBoomVOOPersonsReq.Storage/WarehouseLocationHrs toProcureHrs toLoadOutTravel toStagingTravel toDeployment SiteHrs to Deploy Total HrsAMPOL (available through MSA)42,000’ 18” Boom 16 Crew 40 New Iberia, LA 2 2 3.5 2 12 21.520,000’ 18” Boom 8 Crew 20 New Orleans, LA 2 2 2.75 2 6 14.75AMPOL (available through MSA)10,000’ 18” Boom 4 Crew 10 New Iberia, LA 1 1 3.5 2 3 10.510,000’ 18” Boom 4 Crew 10 Houston, TX 1 1 7 2 3 1410,000’ 18” Boom 4 Crew 10 Port Arthur, TX 1 1 5.75 2 3 12.7520,000’ 18” Boom 8 Crew 20 Belle Chasse, LA 1 1 3 2 6 1310,000’ 18” Boom 4 Crew 10 Port Allen, LA 1 1 3.5 2 3 10.510,000’ 18” Boom 4 Crew 10 Houma, LA 1 1 2 2 3 915,000’ 18” Boom 6 Crew 14 Gretna, LA (Warehouse) 2 2 2.75 2 4 12.75Apache Deepwater LLC Page H-19Joint Initial Exploration Plan June, 2011Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858)Staging Area: FourchonBeach Boom EDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotalHrsCGABeach Boom (2000’) NA NA NA 6 Galveston 1 2 7 1 2 13Beach Boom (1000’) NA NA NA 4 Ingleside 1 2 9.5 1 2 15.5Beach Boom (2000’) NA NA NA 6 Pascagoula 1 2 4 1 2 10Wildlife Response EDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotalHrsCGAWildlife Support Trailer NA NA NA 2 Houma 1 2 1 1 2 7Bird Scare Guns (24) NA NA NA2 Belle Chasse 1 2 2.5 1 2 8.5Bird Scare Guns (12) NA NA NA 2 Galveston 1 2 7 1 2 13Bird Scare Guns (24) NA NA NA 2 Houma 1 2 1 1 2 7Bird Scare Guns (12) NA NANA 2 Ingleside 1 2 9.5 1 2 15.5Bird Scare Guns (24) NA NA NA 2 Lake Charles 1 2 4 1 2 10Bird Scare Guns (24) NA NANA 2 Pascagoula 1 2 4 1 2 10Response Asset TotalOffshore EDRC 318,609Offshore Recovered Oil Storage 389,870Nearshore / Shallow Water EDRC 54,753Nearshore / Shallow Water Recovered Oil Storage 88,709GC 823/867 N-9583 Parmer EP - Apache Deepwater, LLC

Apache Deepwater, LLC, N-9583, GC 823/867, IEP, is providing the following response to your request for “time to co ntain the worst case discharge”. Base d on the assumption of a 12 hour spill volume, and per the response strategies as outlined in Appendix H of the EP, the estimated time to contain to the maximum extent practicable within the limitations of ava ilable technology, physical limitations of personnel and equipment, a nd environmental conditions is 10 days.

Timeline for Response to WCD in GC 823/867

Product: Crude @ 30 0 API Gravity WCD: 166,525 bbls (24 hours) 83,263 bbls (12 hours)

Miles from shore: 133 Miles

1. Formula for volume spilled during first 12 hours

a. 166,525/24 = 6,939 bph x 12 hrs = 83,263 bbls
b. Using Adios
i. Evaporated and dispersed = 6,661 bbls
ii. Remaining volume = 76,602 bbls

2. Three dispersant aircraft with a load capacity of 4,400 gals (3 hour initial deployment/4 hour re-load and deployment considering daylight hours ) allow for a daily dispersant capability of
7,540 bbls.

3. The HOSS Barge is estimated to arrive on locat ion within 26 hours and has an effective de-rated capacity of 43,000 bbls per day.

4. If offshore containment boom was de ployed, the maximum containment achievable

within the limitations of available technology, physical limitations of personnel and equipment, and environmental conditions, when responding to a worst case discharge is based on a rate of boom deployment at 500’/ hour. Initial arrival of boom on
location is estimated at 16 hours; therefore containmen t will begin at an estimated 17 hours and continue during daylight hours only until all necessary boom is deployed. CGA has
25,000 feet of 42” auto boom ava ilable. Working daylight h ours only (12 hours per day), the 25,000’ of auto boom could be deployed within 4.5 days of arrival on scene.

5. Assuming no response, trajectory analysis indi cates a 3 percent probab ility of impact to shorelines of Cameron Parish, Louisiana an d/or Plaquemines Cameron Parish, Louisiana within 30 days. Onshore response may include the deployment of shoreline boom on beach areas, or protection and sorbent boom on vegetated areas. Apache Deepwater, LLC,
maintains MSAs with OSROs with access to 16 0,000 feet of 18” shoreline protection boom. This boom could be on location in one day a nd deployed within 4 days of activation.Apache Deepwater LLC Page I-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 

### APPENDIX I
ENVIRONMENTAL MONITORING INFORMATION

(A) MONITORING SYSTEMS There are no environmental monitoring systems currently in place or planned for the proposed
activities.

(B) INCIDENTAL TAKES
There is no reason to believe that any of the endangered species or marine mammals as listed in
the ESA will be “taken” as a result of th e operations proposed under this plan.

To date, it has been documented that the use of explosives and/or seis mic devices can affect marine life. Operations proposed in this plan will not be utilizing either of these devices.

(C) FLOWER GARDEN BANKS NATIONAL MARINE SANCTUARY Green Canyon Blocks 823 and 867 are not located in the Flower Garden Banks National Marine Sanctuary; therefore, the requested info rmation is not required in this EP.Apache Deepwater LLC Page J-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 

### APPENDIX J
LEASE STIPULATIONS INFORMATION

Exploration activities ar e subject to the following lease sti pulations attached to Green Canyon
Blocks 823 and 867.

Military Warning Area (MWA) Green Canyon Blocks 823 and 867 are located with in designated MWA-92. The Naval Air Station, Air Operations Department in New Orleans, Louisiana, will be contacted in order to
coordinate and control the electromagnetic emissions dur ing the proposed operations.

Marine Protected Species The Marine Protected Species St ipulation is meant to reduce th e potential taking of marine protected species. Apache Deepwater will operate in accordance with NTL 2007-G04, to
minimize the risk of vessel strike s to protected species and report ob servations of injured or dead protected species, and the prevention of intentional and/or accidental intr oduction of debris into
the marine environment.Apache Deepwater LLC Page K-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) APPENDIX K
ENVIRONMENTAL MITIGATION MEASURES INFORMATION

(A) MEASURES TAKEN TO AVOID, MINIMIZE, AND MITIGATE IMPACTS Not applicable for the operations proposed in this EP.

(B) INCIDENTAL TAKES Apache Deepwater will adhere to the requirement s as set forth in the following documents, as applicable, to avoid or minimize impacts to any of the species listed in the ESA as a result of the operations conducted herein:

• NTL 2007-G04, “Vessel Strike Avoidance and In jured/Dead Protected Species Reporting

• NTL 2007-G03, “Marine Trash and Debris Awareness and Elimination”

• NTL 2007-G02, “Implementation of Seismic Su rvey Mitigation Measures and Protected Species Observer Program”Apache Deepwater LLC Page L-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) APPENDIX L
SUPPORT VESSELS AND AI RCRAFT INFORMATION

(A) GENERAL The most practical, direct route from the s horebase as permitted by weather and traffic
conditions will be utilized.

Type Maximum Fuel Tank Capacity Maximum
Number in Area at Any Time Trip Frequency or
Duration

Crew Boat 620 bbls 1 2 per week

Supply Boat 4800 bbls 1 2 per week

Helicopters 560 bbls 1 3 per week

Anchor Handling Vessel 1500 bbls 1 4 days

Tug Boat 3000 bbls 1 2 day

(B) DIESEL OIL SUPPLY VESSELS Size of Fuel Supply
Vessel Capacity of Fuel Supply Vessel Frequency of Fuel Transfers Route Fuel Supply
Vessel Will Take 210’ 4800 bbls 1 per week Shortest route from
Fourchon to GC 823
and 867.

*Please note the actual vessels have not yet been contracted.

(D) SOLID AND LIQUID WASTE TRANSPORTATION Table 2, “ Wastes You Will Transport and/or Dispose of Onshore” is included in this section as
Attachment L-1.

(E) VICINITY MAP
Enclosed as Attachment L-2 is a vicinity map showing the location of the activities proposed
herein relative to the shoreline w ith the distance of th e proposed activities from the shoreline and the primary route(s) of the support vessels and aircraft that will be used when traveling between the onshore support facilities and the dr illing unit.Please specify whether the amount reported is a total or per well.Solid and Liquid WastestransportationType of Waste Composition Transport MethodName/Locationof FacilityAmountDisposalMethodWill drilling occur ? If yes, fill in the muds and cuttings.EXAMPLE: Synthetic-based drillingfluid or mudinternal olefin, esterBelow deck storage tanks onoffshore support vesselsNewportEnvironmentalServices Inc.,Ingleside, TXX bbl/well RecycledSpent synthetic-based drilling fluids andcuttings internal olefin, esterTransport to shorebase incuttings boxes on supply vesselUS Liquids ofLouisianaFourchon, LA700 bbl RecycledWill you produce hydrocarbons? If yes fill in for produced sand.Produced SandWill you have additional wastes that are not permitted for discharge? If yes, fill in the appropriate rows.Trash & debris (Recyclables)Plastic, Paper,Aluminum, GlassStorage bins on supply boat orcrew boatWaste Management7170 Brannon RoadSulphur, LA63,600 lbRecycleTrash and debris (Non-recyclables)Non-hazardous Trashand Debris NonRecyclablesTransport in DOT containers onsupply boats to shorebaseNewparkEnvironmentalFourchon, LA3,180 lbDispose perclassification in alandfill orincinerateChemical product wastesPaint, solvents, unusedchemicals, etcTransport in DOT containers onsupplyboats to shorebaseSafety Kleen SystemBaton Rouge, LA79.5 bblDispose perclassification in alandfill orincinerateUsed Oil Used Oil & GlycolTransport in DOT containers onsupplyboats to shorebaseSafety Kleen SystemBaton Rouge, LA53 bbl RecycledBatteriesBatteries, lamps, glass,mercuryTransport in DOT containers onsupplyto shorebaseLamp EnvironmentalIndustries, Inc.Hammond, LA3.5 bbl RecycledOilyrags, absorbent padsOil Filters, rags, pads,empty drums, cookingoilTransport in DOT containers onsupplyto shorebaseSafety Kleen SystemBaton Rouge, LA8.8 bbl RecycledWaste DisposalTABLE 2. WASTES YOU WILL TRANSPORT AND /OR DISPOSE OF ONSHORENOTE: If you will not have a type of waste, enter NA in the row.Projected generated waste! ! ! ! ! !

! !

! ! ! ! ! ! ! ! ! !

! ! ! ! ! ! ! !

D u l a c

V e n i c e

F o u r c h o n C o c o d r i e

G r a n d I s l e R i v e r R i d g e F o r t J a c k s o n

G r e e n C a n y o n A t w a t e r V a l l e y S h i p S h o a l

S o u t h T i m b a l i e r

M i s s i s s i p p i C a n y o n

W a l k e r R i d g e W e s t D e l t a

E w i n g B a n k

L u n d G r a n d I s l e

S h i p S h o a l S o u t h S o u t h T i m b a l i e r S o u t h W e s t D e l t a S o u t h S o u t h P e l t o T e r

r e b o n n e L a f o u r c h e P l a q u e m i n e s J

e f

f e r

s o n 

# A p a c h e C o r p o r a t i o n V i c i n i t y M a p G r e e n C a n y o n 8 2 3

- 8 6 7

G C 8 2 3 : ~ 1 3 0 . 4 M i l e s t o S h o r e

G C 8 6 7 : ~ 1 3 3 . 4 M i l e s t o S h o r e

G C 8 2 3 : ~ 1 3 6 M i l e s t o F o u r c h o n

, L A S h o r e b a s e

G C 8 6 7 : ~ 1 3 9 M i l e s t o F o u r c h o n

, L A S h o r e b a s e

G C 8 2 3 G C 8 6 7Apache Deepwater LLC Page M-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) APPENDIX M
ONSHORE SUPPORT FACILITIES INFORMATION

(A) GENERAL Apache Deepwater will utilize the following onshore facility to provide supply and service for the proposed operations.

Name of Shorebase Location Existing/New/Modified Martin Fuel Dock Port Fourchon, LA Existing

(B) SUPPORT BASE CONSTRUCTION OR EXPANSION
There will be no new construction of an onshor e support base, nor will we expand the existing shorebase as a result of the operations proposed in this Exploration Plan.

(C) WASTE DISPOSAL Table 2, “Wastes You Will Transport and/or Dispose of Onshore” is included in Appendix L as
Attachment L-1.Apache Deepwater LLC Page N-1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) APPENDIX N
COASTAL ZONE MANAGEMEN T (CZMA) INFORMATION

Relevant enforceable policies were considered in certifying consistency for Louisiana. A certificate of Coastal Zone Management Consistency for the state of Louisiana is enclosed as
Attachment N-1

.Apache Deepwater LLC Page O

- 1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) APPENDIX O ENVIRONMENTAL IMPACT ANALYSIS (EIA) 

### Green Canyon Blocks 823 and 867
OCS-G 33854 and 33858

(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) (1)

Pinnacle Trend area live bottoms (2) (2) (2)

Eastern Gulf live bottoms (3) (3) (3)

Benthic communities (4)

Water quality X X X

Fisheries X X X

Marine Mammals X(8) X X(8) X

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

Air quality X(9)

Shipwreck sites (known or potential) (7)

Prehistoric archaeological sites (7)

Vicinity of Offshore Location

Essential fish habitat X X X(6)

Marine and pelagic birds X X X

Public health and safety (5)

Coastal and Onshore

Beaches X(6) X

Wetlands X(6)

Shore birds and coastal nesting
birds X(6) X

Coastal wildlife refuges X

Wilderness areas XApache Deepwater LLC Page O

- 2 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Footnotes for Environmental Impact Analysis Matrix

1) Activities that may affect a marine sanctuary or topographic f eature. Specifically, if the 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) with relief greater than 2 meters th at is not protected by the Topographic Features Stipulation 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 bl ock where seafloor habitats are protect ed by the Live Bottom (Low-Relief) 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 that could result in an accide ntal spill of produced liquid hydrocarbons or diesel fuel that you determine would impact these environmental resources. If the proposed action is located a sufficient 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 having high-probability for the o ccurrence of shipwrecks or prehistoric sites, including such blocks that will be affected that are adjacent to the lease 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 im pact would occur, the EIA can note that in

a sentence or two. 8) All activities that you determine might have an adverse eff ect 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.Apache Deepwater LLC Page O

- 3 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) (B) Analysis

Site-Specific at Green Canyon Blocks 823 and 867

Proposed operations consist of the drilling, comp letion, and potential testing and TA of seven locations. Operations will be condu cted with a semisubmersible.

1. Designated Topographic Features
Potential IPFs on topographic featur es include physical disturbances to the seafloor, effluents, and
accidents.

Physical disturbances to the seafloor: Green Canyon Blocks 823 and 867 are 66 miles from the closest designated Topographic Fe atures Stipulation Block (Diaphus Bank); therefore, no adverse impacts are expected.

Effluents: Green Canyon Blocks 823 and 867 are 66 miles from the closest designated Topographic Features Stipulation Block (D iaphus Bank); therefore, no adve rse impacts are expected.

Accidents: It is unlikely that an accidental surf ace or subsurface spill would occur from the proposed activities (refer to statistics in Item 5 , Water Quality). Oil spills cause damage to benthic organisms only if the oil contacts the organisms. O il from a surface spill can be driven into the water column; measurable amounts have been documented down to a 10 m depth. At this depth, the oil is found only at concentrations severa l orders of magnitude lower than the amount shown to have an effect on corals. Because the crests of topographic f eatures in the Northern Gu lf of Mexico are found below 10 m, no oil from a surface spill could reach thei r sessile biota. Oil from a subsurface spill is not applicable due to the distance of these blocks fro m a topographic area. The act ivities proposed in this plan will be covered by Apache Deepwater’s Re gional OSRP (refer to information submitted in Appendix H ).

There are no other IPFs (including emissions and wastes sent to shor e for disposal) from the proposed activities, which could imp act topographic features.

2. Pinnacle Trend Area Live Bottoms
Potential IPFs on pinnacle trend area live bottoms include physical disturba nces to the seafloor, effluents, and accidents.

Physical disturbances to the seafloor: Green Canyon Blocks 823 and 867 are 184 miles from the closest live bottom (pinnacle trend) area; therefore, no adverse impacts are expected.Apache Deepwater LLC Page O

- 4 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Effluents: Green Canyon Blocks 823 and 867 is 184 mile s from the closest live bottom (pinnacle trend) area; therefore, no adve rse impacts are expected.

Accidents: It is unlikely that an accidental surf ace or subsurface spill would occur from the proposed activities (refer to statistics in Item 5 , Water Quality). Oil spills ha ve the potential to foul benthic communities and cause lethal and sublethal effects on live bottom organisms. Oil from a surface spill can be driven into the water column; measurable amounts have been documented down to a 10 m depth. At this depth, the oil is found only at concentrations several or ders of magnitude lower
than the amount shown to have an effect on mari ne organisms. Oil from a subsurface spill is not applicable due to the distance of these blocks fro m a live bottom (pinnacle trend) area. The activities proposed in this plan will be covered by Apache Deepwater’s Regional OSRP (refer to information
submitted in Appendix H ).

There are no other IPFs (including emissions and wastes sent to shor e for disposal) from the proposed activities which could impact a liv e bottom (pinnacle trend) area.

3. Eastern Gulf Live Bottoms
Potential IPFs on Eastern Gulf live bottoms include phys ical disturbances to the seafloor, effluents, and
accidents.

Physical disturbances to the seafloor: Green Canyon Blocks 823 and 867 are not located in an area characterized by the existence of live bottoms , and this lease does not contain a Live-Bottom Stipulation requiring a photo documen tation survey and survey report.

Effluents: Green Canyon Blocks 823 and 867 are not locat ed in an area characterized by the existence of live bottoms; therefor e, no adverse impacts are expected.

Accidents: It is unlikely that an accidental surf ace or subsurface spill would occur from the proposed activities (re fer to statistics in Item 5 , Water Quality). Oil spills cause damage to live bottom organisms only if the oil contacts the organisms. O il from a surface spill can be driven into the water column; measurable amounts have been documented dow n to a 10 m depth. At this depth, the oil is found only at concentrations severa l orders of magnitude lower than the amount shown to have an
effect on marine invertebrates. Oil from a subsurface spill is not applicable due to the distance of these blocks from a live bottom area. The activities pr oposed in this plan will be covered by Apache Deepwater’s Regional OSRP (refer to information submitted in Appendix H ).

There are no other IPFs (including emissions and wastes sent to shor e for disposal) from the proposed activities which could impact an Eastern Gulf live bottom area.Apache Deepwater LLC Page O

- 5 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 4. Benthic Communities
Green Canyon Blocks 823 and 867 is lo cated in water depths 984 feet (300 meters) or greater. IPFs that could result in impacts to benthic communities from the pr oposed activities in clude physical
disturbances to the seafloor.

Physical disturban ces to the seafloor: Green Canyon Blocks 823 a nd 867 is approximately 35 miles from a known benthic community site (Ben thic Green Canyon Blocks 823 and 867), listed in NTL 2009-G40. This Joint Initial Expl oration Plan submittal includes the required maps, analyses, and statement(s). The proposed activities will be cond ucted in accordance with NTL 2009-G40, which will ensure that features or areas that could support hi gh-density benthic communities will not be impacted.

There are no other IPFs (including em issions, effluents, wastes sent to shore for disposal , or accidents) from the proposed activities which could impact benthic communities.

5. Water Quality

IPFs that could result in water quality degradation from the proposed operations in Green Canyon
Blocks 823 and 867 include disturbances to the seafloor, effluents and accidents.

Physical disturbances to the seafloor: Bottom area disturbances resulting from the emplacement of drill rigs, the drilling of wells a nd the installation of plat forms and pipelines would increase water-column turbidity and re-suspension of any accumulated pollutants, such as trace metals
and excess nutrients. This would cause short-li ved impacts on water quality conditions in the immediate vicinity of the emplacement operations.

Effluents: Levels of contaminants in drilling muds and cuttings and produced water discharges, discharge-rate restrictions a nd monitoring and toxicity testi ng are regulated by the EPA NPDES permit, thereby eliminating many significant biologica l or ecological effects. Operational discharges are not expected to cause significant adverse im pacts to water quality.

Accidents: Oil spills have the potential to alter offshor e water quality; however, it is unlikely that an accidental surface or subsurface spill would occur from the proposed activities. Between 1980 and 2000, OCS operations produced 4.7 billion barrels of oil and spilled only 0.001 percen t 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 data were collected), there were 80 reported diesel spills greater than one barr el associated with drilling activit ies. Considering that there were 11,944 wells drilled, this is a 0.7 percent probability of an occurrence. If a spill were to occur, the water quality of marine waters w ould be temporarily affected by th e dissolved components and small oil droplets. Dispersion by currents and microbial degradation would remove the oil from the water column and dilute the constituents to background leve ls. Historically, changes in offshore water quality from oil spills have only been detected during the lif e of the spill and up to several months afterwards. Most of the components of oil are in soluble in water and therefore floa t. The activities proposed in thisApache Deepwater LLC Page O

- 6 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) plan will be covered by Apache Deepwater’s Regional Oil Spill Response Plan (refer to information
submitted in Appendix H ).

There are no other IPFs (including em issions, physical disturbances to th e seafloor, and wastes sent to shore for disposal) from the proposed activitie s which could cause impacts to water quality.

6. Fisheries
IPFs that could cause impacts to fisheries as a result of the pr oposed operations in Green Canyon Blocks 823 and 867 include physical disturbances to the seafloor, efflue nts and accidents.

Physical disturbances to the seafloor: The emplacement of a structure or drilling rig results in minimal loss of bottom trawling area to commercial fishermen. Pipelines cause gear conflicts which result in losses of trawls and shrimp catch, business downtime and vessel damage. Most financial losses from gear conflicts are covered by the Fi shermen’s Contingency F und (FCF). The emplacement and removal of facilities are not expected to cau se significant adverse impacts to fisheries.

Effluents: Effluents such as drilling fluids and cuttings discharges contain components and properties which are detrimental to fishery resources. Moderate petroleum and metal contamination of
sediments and the water column can occur out to several hundred meters down-current from the discharge point. Offshore discharges are expected to disperse and dilute to very near background
levels in the water column or on the seafloor with in 3,000 m of the discharge poi nt, and are expected to have negligible effect on fisheries.

Accidents: An accidental oil spill has the potential to cause some detrimental effects on fisheries; however, it is unlikely that such an event woul d occur from the proposed activities (refer to Item 5

, Water Quality). The effects of oil on mobile adult finfish or shellfis h would likely be sublethal and the extent of damage would be reduced to the capacity of adult fish and shellfish to avoid the spill, to metabolize hydrocarbons, and to excrete both me tabolites and parent compounds. The activities proposed in this plan will be covered by Apache Deepwater’s Regional OSRP (refer to information
submitted in Appendix H ).

There are no IPFs from emissions, or wastes sent to shore for disposal from the proposed activities which could cause impacts to fisheries.

7. Marine Mammals

GulfCet II studies revealed that cetaceans of the continental shelf and shelf-edge were almost exclusively bottlenose dolphin and Atlantic spotted dolphin. Squid ea ters, including dwarf and pygmy killer whale, Risso’s dolphin, rough-toothed dolphi n, and Cuvier’s beaked whale, occurred most frequently along the upper slope in areas outside of anticyclones. I PFs that could cause impacts toApache Deepwater LLC Page O

- 7 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) marine mammals as a result of the proposed opera tions in Green Canyon Bl ocks 823 and 867 include emissions, effluents, discarded tr ash and debris, and accidents.

Emissions: Noises from drilling activities, support ve ssels and helicopters may elicit a startle
reaction from marine mammals. Th is reaction may lead to disrup tion of marine mammals’ normal activities. Stress may make them more vulnerable to parasites, disease, environmental contaminants, and/or predation (Majors and My rick, 1990). There is little conc lusive evidence for long-term displacements and population trends for marine mammals relative to noise.

Effluents: Drilling fluids and cuttings discharges contain components which may be detrimental to marine mammals. Most operational discharges are diluted and dispersed upon release. Any potential impact from drilling fluids 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 ingesti on of debris have caused the death or serious injury of marine mammals (Laist, 199 7; MMC, 1999). The limited amount of marine debris, if any, resulting from the proposed activities is not expected to s ubstantially harm marine mammals. Operators are prohibited from de liberately discharging debris as mandated by MARPOL-Annex V and
the Marine Plastic Pollution Research and Control Act, and regulations imposed by various agencies including the United States Coast Guard (USCG) and the Environmental Protection Agency (EPA).

Apache Deepwater will operate in accordance with the regulations and also avoid accidental loss of solid waste items by maintaining waste management pl ans, manifesting trash se nt to shore, and using special precautions such as coveri ng outside trash bins to prevent accidental loss of solid waste. Special caution will be exercised when handling and disposing of small items and packaging materials, particularly those made of non-biod egradable, environmentally persiste nt materials such as plastic or glass.

Informational placards will be post ed on all vessels and f acilities having sleeping or food preparation capabilities. All offshore personne l, including contractor s and other support se rvices-related personnel (e.g. helicopter pilots, vessel captai ns and boat crews) will be indoctrinated on waste procedures, and will view the video (or Mi crosoft 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 ex planation from Apache Deepwater management or the designated l ease operator management that emphasizes their commitment to waste management in accordance 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 main taining a vigilant watch for marine mammals and maintaining a safe distance when they are sighted. Vessel crews shoul d use a reference guide to help identify the twenty-eight species of whales and dolphins, and the singl e species of manatee that may beApache Deepwater LLC Page O

- 8 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) encountered in the Gulf of Mexico OCS. Vessel crews must report si ghtings of any injured or dead protected marine mammal species immediately, regardless of whether the injury or death is caused by their vessel, to the Marine Mammal and Sea Tu rtle Stranding Hotline at (888) 404-3922, the NMFS Southeast Regional Office at (727 ) 824-5312, or the Marine Mammal Stranding Network at (305) 862- 2850. In addition, if the injury or death was cause d by a collision with a cont ract vessel, the BOEM
must be notified within 24 hours of the strike by email to protectedspecies@boemre.gov . If the vessel is the responsible party, it is required to remain available to assist the respective salvage and stranding
network as needed.

Oil spills have the potential to cause sublethal oil-related injuries an d spill-related deaths to marine mammals. However, it is unlikely that an accidental oil spill would occur from the proposed activities (refer to Item 5 , Water Quality). Oil spill response activi ties may increase vessel traffic in the area, which could add to changes in cetac ean behavior and/or distribution, thereby causing a dditional stress to the animals. The effect of oil dispersants on cetaceans is not known. Th e acute toxicity of oil dispersant chemicals included in Apache Deepwater’s OSRP is considered to be low when compared
with the constituents and fractions of crude oils a nd diesel products. The activities proposed in this plan will be covered by Apache Deepwater’s OSRP (refer to information submitted in accordance with Appendix H ).

There are no other IPFs (including physical disturbances to the seafloor) from the proposed activities which could impact marine mammals.

8. Sea Turtles
IPFs that could cause impacts to sea turtles as a result of the proposed opera tions include emissions, effluents, discarded trash and debris, and accidents. GulfCet II studies sighted most loggerhead, Kemp’s ridley and leatherback sea turtles over shel f waters. Historically these species have been sighted up to the shelf’s e dge. They appear to be more abundant east of the Mississippi River than they are west of the river (Fritts et al., 1983b; Lo hoefener et al., 1990). Deep wa ters may be used by all species as a transitory habitat.

Emissions: Noise from drilling activities, support vess els, and helicopters may elicit a startle reaction from sea turtles, but th is is a temporary disturbance.

Effluents: Drilling fluids and cuttings discharges are not known to be lethal to sea turtles. Most operational discharges are diluted and dispersed upon release. Any potential impact from drilling fluids 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 ingestion of, debris have caused the death or serious injury of sea turt les (Balazs, 1985). The limited amount of marine debris, if any, resulting from the proposed activities is not expected to substantia lly harm sea turtles. Oper ators are prohibited fromApache Deepwater LLC Page O

- 9 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) deliberately discharging debris as mandated by MARPOL-Annex V and the Marine Plastic Pollution Research and Control Act, and regulations impose d by various agencies including the United States Coast Guard (USCG) and the Environmental Prot ection Agency (EPA). Apache Deepwater will operate in accordance with the regulations and al so avoid accidental loss of solid waste items by maintaining waste management plans, manifesting tr ash sent to shore, and using special precautions such as covering outside trash bins to prevent acci dental loss of solid waste. Special caution will be exercised when handling and disposing of small ite ms and packaging materials, particularly those made of non-biodegradable, environmentally pers istent materials such as plastic or glass.

Informational placards will be post ed on all vessels and f acilities having sleeping or food preparation capabilities. All offshore personne l, including contractor s and other support se rvices-related personnel (e.g. helicopter pilots, vessel captai ns and boat crews) will be indoctrinated on waste procedures, and will view the video (or Mi crosoft 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 ex planation from Apache Deepwater management or the designated l ease operator management that emphasizes their commitment to waste management in accordance with NTL No. 2007-G03.

Accidents: Collisions between support vessels and sea turt les would be unusual events, however should one occur, death or injury to sea turtles is possible. Contract vessel operators can avoid sea turtles and reduce potential deaths by maintaining a vigilant watch for sea turtles and maintaining a safe distance when they are sighted. Vessel crew s should use a reference guide to help identify the five species of sea turtles that may be encountere d in the Gulf of Mexico OCS. Vessel crews must report sightings of any injured or dead protected s ea turtle species immediately, regardless of whether the injury or death is caused by their vessel, to the Marine Mammal and Sea Turtle Stranding Hotline at (888) 404-3922, the NMFS Southeast Regional Office at (727) 824-5312, or the Marine Mammal Stranding Network at (305) 862-2850. In addition, if th e injury or death was caused by a collision with a contract vessel, the BOEM must be notified within 24 hour s of the strike by email to protectedspecies@boemre.gov . If the vessel is the res ponsible party, it is requi red to remain available to assist the respective salvage a nd stranding network as needed.

All sea turtle species and their life stages are vulnerable to the harmful effects of oil through direct contact or by fouling of th eir food. Exposure to oil can be fatal, pa rticularly to juveniles and hatchlings. However, it is unlikely that an accidental oil spill would occur from the proposed activities (refer to
Item 5 , Water Quality). Oil spill response activities ma y increase vessel traffic in the area, which could add to the possibility of collisions with sea tu rtles. The activities proposed in this plan will be covered by Apache Deepwater’s Regional Oil Spill Response Plan (refer to information submitted in
accordance with Appendix H ).

There are no other IPFs (including physical disturbances to the seafloor) from the proposed activities which could impact sea turtles.Apache Deepwater LLC Page O

- 10 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 9. Air Quality
The projected air emissions identified in Appendix 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 Wilderness Area. Green Canyon Blocks 823 and 867 are beyond the 200 kilometer (124 mile) buffer for the Breton Wilderness Area and is 130 miles from the coastline. Therefore, no special mitigation, monitoring, or re porting requirements appl y with respect to air
emissions.

Accidents and blowouts can release hydrocarbons or chemicals, which could cause the emission of air pollutants. However, these releases would not im pact onshore air quality because of the prevailing atmospheric conditions, emission hei ght, emission rates, and the dist ance of Green Canyon Blocks 823
and 867 from the coastline. There are no other IPFs (including effluents, physic al disturbances to the seafloor, wastes sent to shore for treatment or disposal) from the proposed activities which could impact air quality.

10. Shipwreck Sites (known or potential)
IPFs that could impact known or unknown shipwreck sites as a result of the proposed operations in Green Canyon Blocks 823 and 867 in clude disturbances to the seaf loor. Green Canyon Blocks 823 and 867 are not located in or adjacent to an OCS block designated by BOEM as having a high probability for occurrence of shipwrecks. Apache D eepwater will report to BOEM the discovery of any evidence of a shipwreck and make every reasonab le effort to preserve and protect that cultural resource. There are no other IPFs (i ncluding emissions, effluents, wastes sent to shore for treatment or disposal, or accidents) from the proposed activ ities which could impact shipwreck sites.

11. Prehistoric Archaeological Sites
IPFs which could impact prehisto ric archaeological sites as a result of the proposed operations in Green Canyon Blocks 823 and 867 include disturbances to the seafloor (str ucture emplacement) and accidents (oil spill). Green Canyon Blocks 823 and 867 are located outside the Archaeological Prehistoric high proba bility line. Apache Deepwater will repor t to BOEM the disc overy of any object of prehistoric archaeological signif icance and make every reasonable effo rt to preserve and protect that
cultural resource.

Accidents: An accidental oil spill has the potential to cause some detrimental effects to prehistoric archaeological sites if the release were to occur subsea. However, it is unlikely that an accidental oil spill would occur from the proposed activities (refer to Item 5 , Water Quality). The activities proposed in this plan will be covered by Apache Deepwater’s Regional Oil Spill Response Plan (refer to
information submitted in accordance with Appendix H ).

There are no other IPFs (including emissions, effluents, wastes sent to shore for treatment or disposal) from the proposed activities which could im pact prehistoric archaeological sites.Apache Deepwater LLC Page O

- 11 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Vicinity of Offshore Location

1. Essential Fish Habitat (EFH)
IPFs that could cause impacts to EFH as a result of the proposed operations in Green Canyon Blocks 823 and 867 include physical distur bances to the seafloor, effluent s and accidents. EFH includes all
estuarine and marine waters and subs trates in the Gulf of Mexico.

Physical disturban ces to the seafloor: The Live Bottom Low Relief Stipulation, the Live Bottom (Pinnacle Trend) Stipulation, and the East ern Gulf Pinnacle Trend S tipulation would prevent most of the potential impacts on live-bottom comm unities and EFH from bottom disturbing activities (e.g., anchoring, structure emplacement and removal).

Effluents: The Live Bottom Low Relief Stipulation, th e Live Bottom (Pinnacle Trend) Stipulation,
and the Eastern Gulf Pinnacle Tren d Stipulation would prevent most of the potential impacts on livebottom communities and EFH from operational waste di scharges. Levels of contaminants in drilling muds and cuttings and produced-water discharges, discharge-rate restrictions, and monitoring and toxicity testing are regulated by the EPA NPDES permit, there by eliminating many significant biological or ecological effects. Operational discha rges are not expected to cause significant adverse impacts to EFH.

Accidents: An accidental oil spill has the potential to cause some detrimental effects on EFH. Oil spills that contact coastal bays a nd estuaries, as well as OCS waters when pelagic eggs and larvae are present, have the greatest potential to affect fisher ies. 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 covered by Apache Deepwater’s Regional OSRP (refer to information submitted in Appendix
H ).

There are no other IPFs (including emissions, or wastes sent to shor e for treatment or disposal) from the proposed activities which could impact essential fish habitat.

2. Marine and Pelagic Birds
IPFs that could impact marine birds as a resu lt of the proposed activities include air emissions, accidental oil spills, and discarded trash a nd debris from vessel s and the facilities.

Emissions: Emissions of pollutants into the atmos phere from these activities are far below
concentrations which could harm coastal and marine birds.

Accidents: An oil spill would cause localized, low- level petroleum hydrocarbon contamination. However, it is unlikely that an oil spill w ould occur from the propos ed activities (refer to Item 5

, Water Quality). Marine and pelagic birds feedi ng at the spill location ma y experience chronic,Apache Deepwater LLC Page O

- 12 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) nonfatal, physiological stress. It is expected that few, if any, coas tal and marine birds would actually be affected to that extent. The activities proposed in this plan will be covered by Apache Deepwater’s Regional OSRP (refer to information submitted in Appendix H ).

Discarded trash and debris : Marine and pelagic birds could become entangled and snared in discarded trash and debris, or ingest small plastic debris, which can cause permanent injuries and death. Operators are prohibited from deliberatel y discharging debris as mandated by MARPOL-Annex
V and the Marine Plastic Pollution Research and Control Act, and regulat ions imposed by various agencies including the United States Coast Guard (USCG) and the Environm ental Protection Agency (EPA). Apache Deepwater will operate in accordan ce with the regulations a nd also avoid accidental loss of solid waste items by maintaining waste manageme nt plans, manifesting trash sent to shore, and using special precautions such as covering outside tr ash bins to prevent accidental loss of solid waste. Special caution will be exercised when handling and disposing of small items and packaging materials, particularly those made of non-biod egradable, environmentally persiste nt materials such as plastic or glass. Informational placards will be posted on all vessels and facilities having sleeping or food preparation capabilities. All offshore personnel, including c ontractors and other support servicesrelated personnel (e.g. helicopter pilots, vessel captain s 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 wi ll also receive an explanation from Apache Deepwater management or the designa ted lease operator management that emphasizes their commitment to waste management in accorda nce with NTL No. 2007-G03. Debris, if any, from these proposed activities will seldom interact with ma rine and pelagic birds; th erefore, the effects will be negligible.

There are no other IPFs (including e ffluents, physical disturbances to the seafloor, or wastes sent to shore for treatment or disposal) from the proposed activities which could imp act marine and pelagic
birds.

3. Public Health and Safety Due to Accidents.

There are no IPFs (emissions, effluent s, physical disturbances to the se afloor, wastes sent to shore for treatment or disposal or accidents, including an a ccidental H2S releases) from the proposed activities which could cause impacts to public health and safety. In accordance with NTL No.’s 2008-G04, 2009-G27, and 2009-G31, sufficient 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 the proposed activities th at could cause impacts to beaches include accidents (oil spills) and
discarded trash and debris.Apache Deepwater LLC Page O

- 13 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Accidents: Oil spills contacting beaches would have impacts on the use of recreational beaches and
associated resources. Due to th e distance from shore (130 miles) and the response capabilities that would be implemented, no significan t adverse impacts are expected. The activities proposed in this plan will be covered by Apache Deepwater’s Re gional OSRP (refer to information submitted in Appendix H ).

Discarded trash and debris: Trash on the beach is recognized as a major threat to the enjoyment and use of beaches. There will only be a limited am ount of marine debris, if any, resulting from the proposed activities. Operators ar e prohibited from deliberately di scharging debris as mandated by
MARPOL-Annex V and the Marine Plastic Pollution Research and Control Act, and regulations imposed by various agencies including the United States Coast Guard (USCG) and the Environmental Protection Agency (EPA). Apache Deepwater will opera te in accordance with the regulations and also avoid accidental loss of solid waste items by mainta ining waste management plans, manifesting trash sent to shore, and using special precautions such as covering outside trash bi ns to prevent accidental loss of solid waste. Special caution will be exercise d when handling and disposing of small items and packaging materials, particularly those made of non-biodegradable, envi ronmentally persistent materials such as plastic or glass.

Informational placards will be post ed on all vessels and f acilities having sleeping or food preparation capabilities. All offshore personne l, including contractor s and other support se rvices-related personnel (e.g. helicopter pilots, vessel captai ns and boat crews) will be indoctrinated on waste procedures, and will view the video (or Mi crosoft 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 ex planation from Apache Deepwater management or the designated l ease operator management that emphasizes their commitment to waste management in accordance with NTL No. 2007-G03.

There are no other IPFs (emissions, e ffluents, physical disturbances to the seafloor, or wastes sent to shore for treatment or disposal) from the proposed activities which could impact beaches.

2. Wetlands
Accidents: Oil spills co uld cause impacts to wetlands, however, it is unlikely that an oil spill would occur from the proposed activities (refer to Item 5 , Water Quality). Due to the distance from shore (130 miles) and the response capab ilities that would be implemented, no impacts are expected. The activities proposed in this plan will be covere d by Apache Deepwater’s Regional OSRP (refer to
information submitted in Appendix H ).

There are no other IPFs (emissions, e ffluents, physical disturbances to the seafloor, or wastes sent to shore for treatment or disposal) from the pr oposed activities which could impact wetlands.Apache Deepwater LLC Page O

- 14 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 3. Shore Birds and Coastal Nesting Birds

Accidents: Oil spills could cause impacts to shore birds and coastal nesting birds. However, it is unlikely that an oil spill would occur fr om the proposed activities (refer to Item 5 , Water Quality). Given the distance from shore (130 miles) and th e response capabilities that would be implemented, no impacts are expected. The activities proposed in this plan will be covered by Apache Deepwater’s Regional OSRP (refer to information submitted in Appendix H ).

Discarded trash and debris: Coastal and marine birds are highl y susceptible to entanglement in floating, submerged, and beached marine debris: speci fically plastics. Operat ors are prohibited from deliberately discharging debris as mandated by MARPOL-Annex V and the Marine Plastic Pollution Research and Control Act, and regulations impose d by various agencies including the United States Coast Guard (USCG) and the Environmental Prot ection Agency (EPA). Apache Deepwater will operate in accordance with the regulations and al so avoid accidental loss of solid waste items by maintaining waste management plans, manifesting tr ash sent to shore, and using special precautions such as covering outside trash bins to prevent accidental loss of solid waste. Special caution will be exercised when handling and disposing of small ite ms and packaging materials, particularly those made of non-biodegradable, environmentally pers istent materials such as plastic or glass.

Informational placards will be posted on vessels and every facility that has sleeping or food preparation capabilities. All offshore personnel, including c ontractors and other support servicesrelated personnel (e.g. helicopter pilots, vessel captain s 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 wi ll also receive an explanation from Apache Deepwater management or the designa ted lease operator management that emphasizes their commitment to waste management in accordance with NTL No. 2007-G03.

There are no other IPFs (emissions, e ffluents, physical disturbances to the seafloor, or wastes sent to shore for treatment or disposal) from the proposed ac tivities that could cause impacts to shore birds and coastal nesting birds.

4. Coastal Wildlife Refuges

Accidents: An accidental oil spill from the proposed act ivities could cause impacts to coastal wildlife refuges. However, it is unlikely th at an oil spill would occur from th e proposed activities (refer to Item 5, Water Quality). Due to the distance from shor e (130 miles) and the res ponse capabilities that would be implemented, no impacts are expected. The activ ities proposed in this plan will be covered by Apache Deepwater’s Regional OSRP (refer to information submitted in Appendix H ).

There are no other IPFs (emissions, e ffluents, physical disturbances to the seafloor, or wastes sent to shore for treatment or disposal) from the proposed activities that could cause impacts to coastal wildlife refuges.Apache Deepwater LLC Page O

- 15 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) 5. Wilderness Areas
An accidental oil spill from the proposed activities could cause impacts to wilderness areas. However, it is unlikely that an oil spill would occu r from the proposed activities (refer to Item 5 , Water Quality). Due to the distance from the nearest designate d Wilderness Area (175 miles) and the response capabilities that would be implem ented, no significant adverse impact s are expected. The activities proposed in this plan will be covered by Apache Deepwater’s Regional OSRP (refer to information
submitted in Appendix H).

6. Other Environmental Resources Identified

(C) Impacts on your proposed activities.

The site–specific environmental conditions have been taken into account for th e proposed activities. No impacts are expected on the proposed activit ies from site-specific environmental conditions.

(D) Environmental Hazards During the hurricane season, June through November, the Gulf of Mexico is imp acted by an average of ten tropical storms (39-73 mph wind s), of which six become hurricanes ( > 74 mph winds). Due to its location in the gulf, Green Canyon Blocks 823 and 867 may experience hurricane and tropical storm force winds, and related sea currents. These factors can adversely impact the integrity of the operations covered by this plan. A significant storm may presen t physical hazards to operators and vessels, damage exploration or production equi pment, or result in the releas e of hazardous mate rials (including hydrocarbons). Additionally, the displacement of equi pment may disrupt the local benthic habitat and pose a threat to local species.

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

1. Drilling & completion

a. Secure well
b. Secure rig / platform

c. Evacuate personnel

Drilling activities will be conducted in acco rdance with NTL No.’s 2008-G09, 2009-G10, and 2010-

N10 .

2. Caisson Installation Operator will not conduct caisson instal lation operations during Tropical Storm or
Hurricane threat.

(E) Alternatives

No alternatives to the proposed activities were cons idered to reduce environmental impacts.Apache Deepwater LLC Page O

- 16 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) (F) Mitigation Measures

No mitigation measures other than those required by regulation will be employed to avoid, diminish, or eliminate potential impacts on environmental resources.

(G) Consultation

No agencies or persons were co nsulted regarding potential impact s associated w ith the proposed activities. Therefore, a list of such entities has not been provided.

(H) Preparer(s)

Evan Connolly J. Connor Consulting, Inc. 16225 Park Ten Place, Suite 700 Houston, TX 77084 (281) 578-3388 evan.connolly@jccteam.com

(I) References

Authors:

American Petroleum Institute (API). 1989. Effects of offshore petroleum ope rations on cold water
marine mammals: a literature re view. Washington, DC: American Petroleum Institute. 385 pp.

Balazs, G.H. 1985. Impact of ocean debris on marine turtles: entanglement and ingestion. In: Shomura, R.S. and H.O. Yoshida, eds. Proceedings, Workshop on the Fate and Impact of Marine Debris, 26- 29 November 1984, Honolulu, HI. U.S. Dept . of Commerce. NOAA Tech. Memo. NOAA-TMNMFS-SWFC-54. Pp 387-429.

Burke, C.J. and J.A. Veil. 1995. Potential benefits from regulatory consideration of synthetic drilling muds. Environmental Assessment Division, Ar gonne National Laboratory, ANL/EAD/TM-43

Daly, J.M. 1997. Controlling the discharge of syntheti c-based drilling fluid contaminated cuttings in
waters of the United States. U.S. Environmental Protection Agency, Office of Water. Work Plan, June 24, 1997.

Hansen, D.J. 198l. The relative sensitivity of seabir d populations in Alaska to oil pollution. U.S. Dept. of the Interior, Bureau of Land Management, Alaska OCS Region, Anc horage. BLM-YK-ES-81-
006-1792.

Laist, D.W. 1997. Impacts of marine debris: entanglem ent of marine life in marine debris including a comprehensive list of species with entanglement a nd ingestion records. In : Coe, J.M. and D.B.Apache Deepwater LLC Page O

- 17 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) Rogers, eds. Marine debris: sources, impacts, and solutions. New Yor k, NY: Springer-Verlag. Pp.
99-139

Majors, A.P. and A.C. Myrick, Jr. 1990. Effects of noi se on animals: implications for dolphins exposed to seal bombs in the eastern tropical Pacific purse-seine fishery–an annotated bibliography. NOAA Administrative 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. Nysewande r. 1990. Immediate 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. Losses of seabirds by oil pollution at the German North Sea coast. Topics in Mari ne Biology. Ros, J.D, ed. Scient. Mar. 53 (2- 3): 749-754

Vermeer, K. and R. Vermeer, 1975 Oil threat to bi rds 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. Environmental Assessment. MMS 2000-001

o GOM Central and Western Planning Areas Sa les 166 and 168 Final Environmental Impact
Statement. MMS 96-0058Apache Deepwater LLC Page P

- 1 Joint Initial Exploration Plan June, 2011 Green Canyon Blocks 823 and 827 (OCS-G 33854 and OCS-G 33858) APPENDIX P
ADMINISTRATIVE INFORMATION

(A) EXEMPTED INFORMATION DESCRIPTION The proposed bottom-hole locations of the pla nned well have been removed from the public information copy of the EP as well as any discussions of the target objectives, geologic or geophysical data, and any interpreted geology.

(B) BIBLIOGRAPHY Not applicable.