### UNITED STATES GOVERNMENT MEMORANDUM

To: Public Information (MS 5030)

Plans Section, Office of Field Operations (MS 5231)

Public Information copy of Exploration Plan

Control # - R-05208

Type - Revised Exploration Plan

Lease(s) - OCS-G24062 Block - 253 Mississippi Canyon Area OCS-G32303 Block - 208 Mississippi Canyon Area

Operator - LLOG Exploration Offshore, L.L.C.

Wells A through E

SEMISUBMERSIBLE

Attached is a copy of the subject plan for public comments on issues that
should be addressed in an Environmental Assessment.

It has been deemed submitted as of this date and is under review for approval.

Chiquita Hill

Plan Coordinator Description -

Rig Type - Subject: From: September 22, 2011

# LLOG EXPLORATION OFFSHORE, L.L.C.

1001 Ochsner Boulevard, Suite 200 Covington, Louisiana 70433



# REVISED EXPLORATION PLAN

OCS-G-32303 & OCS-G-24062

MISSISSIPPI CANYON BLOCKS 208/253

PREPARED BY:

Kathy Gowland Regulatory Specialist 985-801-4300 (Main) 985-801-4317 (Direct)

kathygo@llog.com

## LLOG EXPLORATION OFFSHORE, L.L.C.
REVISED EXPLORATION PLAN
OCS-G-32303 & 24062 Leases Mississippi Canyon Blocks 208 & 253

APPENDIX A Plan Contents

APPENDIX B General Information

APPENDIX C Geological, Geophysical Information

APPENDIX D H2S Information

APPENDIX E Biological, Physical and Socioeconomic Information

APPENDIX F Waste and Discharge Information

APPENDIX G Air Emissions Information

APPENDIX H Oil Spill Information

APPENDIX I Environmental Monitoring Information

APPENDIX J Lease Stipulation Information

APPENDIX K Environmental Mitigation Measures Information

APPENDIX L Related Facilities and Op erations Information

APPENDIX M Support Vessels and Aircraft Information

APPENDIX N Onshore Support Facilities Information

APPENDIX O Coastal Zone Management Act (CZMA) Information

APPENDIX P Environmental Impact Analysis

APPENDIX Q Administrative InformationMississippi Canyon Block 253 (OCS-G 24062) 7/7/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 1 

# APPENDIX A
PLAN CONTENTS (30 CFR Part 250.211 and 250.241)

A. Plan information

In accordance with 30 CFR 250.211 and 250.241(a),and NTL No. 2008-G04 and NTL 2010-N06, LLOG Expl oration Offshore, LLC proposes to revise our currently approved Explor ation Plan (Control No. N-09406) for the drilling, completion and testing and installation of subsea wellhead and/or manifold for proposed locations for Lease OCS- G-24062, Mississippi Canyon Block 253,
Wells A and B and Lease OCS- G-32303, Mississippi Canyon Block 208, Wells C, D and E.

Included as Attachment A is Form MMS 137 “OCS Plan Information Form”.

. 

# B. Location

Attachment B

– Well Location Plat - No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.

Attachment C – Bathymetry Map – Seafloor disturbance area with anchor
Radius - Revised



# C. Safety & Pollution Features

Safety features on the semi-submersible will include well control, pollution prevention, welding procedure, and blow out prevention equipment as described in Title 30 CFR Part 250, Subparts C, D, E, G & O; and as further clarified by Notices to Lessees, U.S. Environmental Protection Agency and the U. S. Coast Guard. The appropriate life rafts, life j ackets, ring buoys, etc., as prescribed by the U. S. Coast Guard will be maintained on the facility at all times.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# D. Storage Tanks and Vessels

The following table details the storage tanks and/or production vessels that will store oil (capacity greater than 25 barre ls) and be used to support the proposed activities (MODU, barges, platform, etc.):Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 2 

### Type of Storage Tank Type of Facility Tank Capacity (bbls) Number of

tanks Total Capacity (bbls) Fluid Gravity (API)

Fuel Oil (Marine Diesel) SemiSubmersible 95.24 2 190.5 No. 2 Diesel

2917.8 4 11,671.2 Total 11,861.7



# E. Pollution Prevention Measures

This section of the plan is not a pplicable to the proposed operations.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# F. Additional measures :

No additional measures are proposed.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, CS-G-32303, Control No. N-09406 approved on October 22, 2009.

### U.S. Department of the Interior OMB Control Number: 1010-0151 

### Minerals Management Service OMB Approval Expires: 12/31/2011 

## OCS PLAN INFORMATION FORM

General Information

Type of OCS Plan: Exploration Plan (EP) Deve lopment Operations Coordination Document (DOCD)

Company Name: MMS Operator Number:

Address: Contact Person:

Phone Number:

E-Mail Address:

Lease(s): Area: Block(s): Project Name (If Applicable):

Objective(s): Oil Gas Sulphur Salt Ons hore Base: Distance to Closest Land (Miles):



### Description of Proposed Activities (Mark all that apply)

Exploration drilling Development drilling

Well completion Installation of production platform

Well test flaring (for more than 48 hours) Installation of production facilities

Installation of caisson or platform as well protec tion structure Installation of satellite structure

Installation of subsea wellheads and/ or manifolds Commence production

Installation of lease term pipelines Other (Specify and describe)

Have you submitted or do you plan to submit a Conservation Information Document to accompany this plan? Yes No

Do you propose to use new or unusual technology to conduct your activities? Yes No

Do you propose any facility that will serve as a host facility for deepwate r subsea development? Yes No

Do you propose any activities that may disturb an MMS-des ignated high-probability archaeological area? Yes No

Have all of the surface locations of your proposed activities been previously reviewed and approved by MMS? Yes No



### Tentative Schedule of Proposed Activities

Proposed Activity Start Date End Date No. of Days



### Description of Drilling Rig Description of Production Platform

Jackup Drillship Caisson Tension leg platform

Gorilla Jackup Platform rig Well protector Compliant tower

Semisubmersible Submersible Fixed platform Guyed tower

DP Semisubmersible Other (Attach Descripti on) Subsea manifold Floating production system

Drilling Rig Name (If Known): Spar Other (Attach Description)



### Description of Lease Term Pipelines

From (Facility/Area/Block) To (Facility/Area/Block) Diamet er (Inches) Length (Feet)



## MMS FORM MMS-137 (December 2008 - Supersedes all previous editi ons of form MMS-137 which may not be used.) 

### Page 1 of 2

## 2

OCS PLAN INFORMATION FORM ( CONTINUED 

### ) Include one copy of this page for each proposed well/structure 

### Proposed Well/Structure Location

Well or Structure Name/Number (If rena ming well or structure, reference previous name): Subsea Completion

Anchor Radius (if applicable) in feet: Yes No

Surface Location Bottom-Hole Location (For Wells)

Lease No. OCS OCS

Area Name

Block No.

Blockline Departures (in feet) N/S Departure: F____ L N/S Departure: F____ L

E/W Departure: F____ L E/W Departure: F____ L

Lambert X-Y
coordinates X: X:

Y: Y:

Latitude/ Longitude Latitude Latitude

Longitude Longitude

TVD (Feet): MD (Feet): Water Depth (Feet):



### Anchor Locations for Drilling Rig or Construction Barge ( If anchor radius supplied above, not necessary)

Anchor Name

or No. Area Block X Coordinate Y C oordinate Length of Anchor
Chain on Seafloor

X = Y =

X = Y =

X = Y =

X = Y =

X = Y =

X = Y =

X = Y =

X = Y =



### Paperwork Reduction Act of 1995 Statement: The Paperwork Reduction Act of 1995 (44 U.S.C. Chapter 35) requires us to inform you that MMS collects this information as part of an applicant’s Exploration Plan or Development Operations Coordination Document submitted for MMS approval. We use the information to facilitate our review and data entry for OCS plans. We will protect proprieta ry data according to the Freedom of Information Act and 30 CFR 250.197. An agency may not conduct or sponsor, and a pe rson is not required to respond to, a collection of information unless it displays a currently valid Office of Management and Budget Control Number. The use of this form is voluntary. The public reporting burden for this form is included in the burden fo r preparing Exploration Plans and Development Operations

Coordination Documents. We estimate that burden to average 600 hours per response, or 640 with an accompanying EP (1,000 hours in AKOCSR), or 690 (1,700 in AKOCSR) with an accompanying DPP or DOCD, including the time for reviewing instructions, gathering and maintaining data, and comp leting and reviewing the forms associated with subpart B. Direct comments regarding the burden estimate or any other as pect of this form to the Information Collection Clearance Officer, Mail Stop 5438, Minerals Management Service, 1849 C Street, NW., Washington, DC 20240.



## MMS FORM MMS-137 (December 2008 - Supersedes all previous editi ons of form MMS-137 which may not be used.) 

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- G 3 2 3 0 3 )Mississippi Canyon Block 253 (OCS-G 24062) 6/21/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 3 

# APPENDIX B
GENERAL INFORMATION (30 CFR Part 250.213 and 250.243)

A. Applications and Permits

There are no Federal/State applications to be submitted for the activities provided for in this Plan (exclusive to BOEMRE permit applications and general permits issued by the EPA and COE)

Application/Permit Issuing Agency Status

N/A



# B. Drilling Fluids

Type of Drilling Fluid Estimated Volume of Drilling Fluid to be used per Well
Water Based (seawater, freshw ater, barite) 63,745 bbls Oil –based (diesel, mineral oil) N/A Synthetic-based (internal olefin, ester) 6,750 bbls



# C. New Or Unusual Technology

LLOG does not propose using any new and/or unusual technology for the operations proposed this Revised Plan.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# D. Bonding Statement

The bond requirements for the activities and f acilities proposed in this Revised EP are satisfied by an area wide bond, furnis hed and maintained according to 30 CFR Part 256; subpart I; NTL No. 2006-G16, “G uidelines for General Lease Surety Bonds,” and additional security under 30 CFR 256.43(d) and National NTL No. 2003-N06 “Supplemental Bonding Procedures.”

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 4 

# E. Oil Spill Responsibility (OSFR)

LLOG Exploration Offshore, L.L.C (MMS Co. No. 02058) will demonstrate oil spill financial responsibili ty for the facilities propos ed in this Revised EP according to 30 CFR Part 253, and NTL 99-N01, “Guidelines for Oil Spill Financial Responsibility fo r Covered Facilities.”

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# F. Deepwater Well Control Statement

LLOG Exploration Offshore, L.L.C. ( MMS Co. No. 02058) has the financial capability to drill a relief well and conduct other emergency well control operations.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# G. Blowout Scenario

See the following Blowout Scenario incl uding Site Specific Proposed Relief Well and Intervention Planning and Relief Well Response Time Estimate.

### BLOWOUT SCENARIO
MC 208-253 Created by: S.L. Stegeman
Last Revised: 7/13/2011 Page 1 of 8
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### 1 BLOWOUT SCENARIO

Pursuant with 30 CFR 250.213(g), 250.219, 250, 250 and NTL 2010-N06 the following attachment provides a blowout scenario description, informatio n regarding any oil spill, WCD results and assumptions of potential spill and additional measures taken to firstly enhance the ability to prevent a blowout and secondly to manage a blowout scenario if it occurred.

INFORMATION REQUIREMENTS

PROPOSED PROSPECT INFORMATION

Well Surface Location WD X (NAD 27) Y (NAD 27) Latitude Longitude MC 253 “A” OCS-G-24062 5042 1,204,584’ 10,431,637’ 28 ° 44’ 17.68” 88 ° 21’ 37.34” MC 253 “B” OCS-G-24062 4922 1,204,436’ 10,434,800’ 28 ° 44’ 48.98” 88 ° 21’ 39.41” MC 208 “C” OCS-G-32303 4750 1,202,630’ 10,439,071’ 28 ° 45’ 31.07” 88 ° 22’ 00.25” MC 208 “D” OCS-G-32303 4707 1,200,850’ 10,439,116’ 28 ° 45’ 31.31” 88 ° 22’ 20.26” MC 208 “E” OCS-G-32303 4645 1,203,299’ 10,446,834’ 28 ° 46’ 48.01” 88 ° 21’ 53.74”



### INFORMATION REQUIREMENTS

A) Blowout scenario

The MC 253 well to be drilled to potential outlined in the Geological and Geophysical Information Section of this plan utilizing a typical subsea wellhead system, conductor, surface and intermediate casing strings from a pre-existing wellbore and a MODU rig with marine riser and a subsea BOP system. A hydrocarbon influx and a well control event occurring from the objective sand is modeled with no drill pipe or obstructions in the wellbore followed by a failure of the subsea BOP’s and loss of well control at the seabed. The simulated flow and worst case discharge (WCD) results for all wells are calculated and the highest WCD is used for this unrestricted blowout scenario.

B) Estimated flow rate of the potential blowout

Category Revised EP Type of Activity Drilling Facility Location (area / block) MC 253 Facility Designation MODU Distance to Nearest Shoreline (miles) ~54 Uncontrolled Blowout (Volume per day) 190,525 bbls Type of Fluid Crude

C) Total volume and maximum duration of the potential blowout

Duration of Flow (days) 114 days total (s ee Relief Well Response Estimate below) Total Volume of Spill (bbls) 21.7 MMBO based on 114 days of uncontrolled flow

D) Assumptions and calculations used in determining the worst case discharge

Sbmitted under separate cover with the Proprietary Copy of this Plan. Omitted from Public Information Copies.

E) Potential for the well to bridge over

### BLOWOUT SCENARIO
MC 208-253 Created by: S.L. Stegeman
Last Revised: 7/13/2011 Page 2 of 8
Confidential



### 2 Mechanical failure/collapse of the borehole in a bl owout scenario is influenced by several factors including in-situ stress, rock strength and fluid veloci ties at the sand face. Given the substantial fluid velocities inherent in the WCD, and the scenario as defined where the formation is not supported by a cased and cemented wellbore, it is possible that the borehole may fall/collapse/bridge over within a span of a few days, significantly reducing the outflow of the rates. For this blowout scenario, no bridging is considered.

F) Likelihood for intervention to stop blowout

The likelihood of surface intervention to stop a blow out is based on some of the following equipment specific to potential MODU’s to be co ntracted for this well. It is reasonable to assume that the sooner you are able to respond to the initial blowout, the better likelihood there is to control and contain the event due to reduced pressures at the wellhead, less exposure of well fluids to erode and compromise the well control equipment, and less exposure of hydrocarbons to the surface to safeguard personnel and equipment in an emer gency situation. This equipment includes:

• Secondary Acoustic BOP Control System – ty pically fitted on DP MODU’s presently operating in the GOM. This system has the ability to co mmunicate and function specific BOP controls
from the surface in the event of a failure of th e primary umbilical control system. This system typically can establish BOP controls from the surface acoustic system package on the rig or by deploying a second acoustic pa ckage from a separate vessel of opportunity. This system may not be included on all MODU’s such as 4 th 

### generation moored rigs. This system is typically configured to function the following:

- Blind/;shear ram close - Pipe ram close
- LMRP disconnect

• ROV Intervention BOP Control System – includes one or more ROV intervention panels mounted on the subsea BOP’s located on the seabed allows a ROV utilizing standard ROV
stabs to access and function the specific BOP controls. These functions will be tested at the surface as part of the required BOP stump test and selectively at the seafloor to ensure proper functionality. These function include the following (at a minimum):

- Blind/shear ram close - Pipe ram close
- LMRP disconnect
- WH disconnect

• Deadman / Autoshear function – typically fitted on DP MODU’s and but to be on all MODU’s operating in the GOM according to new requi rements, this equipment allows for an automated pre-programmed sequence of function s to close the casing shear rams and the
blind/shear rams in the event of an inadvertent or emergency disconnect of the LMRP or loss of both hydraulic and electrical supp ly from the surface control system.

In the event that the intervention systems for the subsea BOP’s fail, LLOG will initiate call out of a secondary containment / surface in tervention system supported by t he Helix Well Containment Group (HWCG) of which LLOG is a member. This system incorporates a capping stack capable of being deployed from the back of a vessel of opportunity equipped with an ROV or from the Helix Q4000 DP MODU. Based on the potential integrity concerns of the well, a “cap and flow” system can be deployed which may include the Helix Producer 1 capable of handling up to 55,000 BOPD flowback. The vertical intervention work is contingent upon the condition of the blowing out well and what equipment is intact to access the wellbore for kill or containment operations. The available

### BLOWOUT SCENARIO
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Last Revised: 7/13/2011 Page 3 of 8
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### 3 intervention equipment may also require modificati ons based on actual wellbore conditions. Standard equipment is available through the Helix Deepwater Containment System to fit the wellhead and BOP stack profiles used for the drilling of the above mentioned well.

G) Availability of rig to drill relief we ll, rig constraints and timing of rigs

LLOG currently has one deepwater MODU under contract (Noble Amos R unner moored semi). In the
event of a blowout scenario that does not involve lo ss or damage to the rig such as an inadvertent disconnect of the BOP’s, then the existing contract ed rig may be available for drilling the relief well
and vertical intervention work. If the blowout scenario involves damage to the rig or loss of the BOP’s and riser, a replacement rig or rigs will be required.

With the current activity level in the GOM, 25 to 35 deepwater MODU’S are potentially available to support the relief well drilling operations. Rig shar e and resource sharing agreements are in place
between members of the Helix Well Containment Group. The ability to negotiate and contract an appropriate rig or rigs to drill relief wells is highly pr obable in a short period of time. If the rig or rigs are operating, the time to properly secure the well and mobe the rig to the relief well site location is estimated to be about 14 to 21 days. Dynamically positioned (DP) MODU’s would be the preferred option due to the logistical advantage versus a mo ored MODU which may add complications due to the mooring spread.

VESSELS OF OPPORTUNITY

Based on the water depth restrictions for the proposed locations the following “Vessels of Opportunity” are presently available for utilizati on for intervention and containment and relief well operations. These may include service vessels and drilling rigs capable of working in the potential water depths and may include moored vessels and dynamically positioned vessels. The specific
conditions of the intervention or re lief well operations will dictate the “best fit” vessel to efficiently perform the desired results based on the blowout scenario. The list included below illustrates specific option that may vary according to the actual timi ng / availability at the time the vessels are needed.

OPERATION SPECIF IC VESSEL OF OPPORTUNITY

Intervention and Containment • Helix Q4000 (DP Semi)

• Helix Producer 1 (DP FPU) Relief Well Drilling Rigs • Diamond Ocean Victory (Moored Semi)

• Ensco 8502 (DP Semi)

• Transocean Enterpri se (DP Drillship) ROV / Multi-Purpose Service Vessels • Oceaneering (numerous DP ROV vessels)

• HOS Achiever, Iron Horse 1 and 2 (DP MPSV)

• Helix Pipe Lay Vessel (equipped w/ 6” PL – 75,000’)

• Other ROV Vessels – (Chouest, HOS, Fugro, Subsea 7) Shuttle Tanker / Barge Support • OSG Ship Management

H) Measures taken to enhance ability to prevent blowout

Pursuant to BOEM-2010-034 Final Interim Rules, measures to enhance the ability to prevent or reduce the likelihood of a blowout are largel y based on proper planning and communication, identification of potential hazards, training and experience of personnel , use of good oil field practices and proper equipment that is properly maintained and inspected for executing drilling operations of the proposed well or wells to be drilled.

### BLOWOUT SCENARIO
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### 4 When planning and designing the well, ample time is spent analyzing offset data, performing any needed earth modeling and identifying any potential dr illing hazards or well specific conditions to safeguard the safety of the crews when well constr uction operations are underway. Once the design criteria and well design is established, the well desi gn is modeled for the lifecycle of the wellbore to ensure potential failure modes are eliminated. Pursuant to BOEM-2010-0034 Interim Final Rules implemented additional considerations of a minimu m of 2 independent barriers for both internal and external flow paths in addition to proper pos itive and negative testing of the barriers.

The proper training of crew members and awarenes s to identify and handle well control event is the best way prevent a blowout incident. Contractor ’s personnel and service personnel training requirements are verified per regulatory requirem ents per guidelines issued in BOEM-2010-034 Interim Final Rules. Drills are performed frequently to verify crew training and improve reaction times.

Good communication between rig personnel, office support personnel is critical to the success of the operations. Pre-spud meetings are conducted with ri g crews and service providers to discuss, inform and as needed improve operations and well plans for safety and efficiency considerations. Daily meetings are conducted to discuss planning and pot ential hazards to ensure state of preparedness
and behavior is enforced to create an informed and safe culture for the operations. Any changes in the planning and initial wellbore design is incorporated and communicated in a Management of Change (MOC) process to ensure continuity for all personnel.

Use of established good oil field practices that safeguard crews and equipment are integrated to incorporate LLOG’s, the contractor and service provider policies.

Additional personnel and equipment will be used as needed to elevate awareness and provide real time monitoring of well conditions while drilling such as MWD/LWD/PWD to ols used in the bottom hole assemblies. The tool configuration for each open hole section varies to optimize information gathered including the use of Formation-Pressure-While -Drilling (FPWD) tools to establish real time formation pressures and to be used to calibrates pore pressure models while drilling. Log information and pressure data is used by the drilling engi neers, geologist and pore pressure engineers to maintain well control and reduced potential event s such as well control events and loss circulation

events.

Mud loggers continuously monitor return drilling flui ds, drill gas levels and cuttings as well as surface mud volumes and flow rates, rate of penetration and lithology/paleo to aid in understanding trends and geology being drilled. Remote monitoring of real time drilling parameters and evaluation of geologic markers and pore pressure indicators is used to identify potential well condition changes.

Proper equipment maintenance and inspection program for same to before the equipment is required. Programmed equipment inspections and maintenance will be performed to ensure the equipment operability and condition. Operations will cease as needed in order to ensure equipment and well
conditions are maintained and controlled for the sa fety of personnel, rig and subsurface equipment
and the environment.

I) Measures to conduct effective and early intervention in the event of a blowout

In conjunction with the LLOG Exploration’s “Well Control Emergency Response Plan” and as required by NTL 2010-N06, the following is provided to dem onstrate the potential time needed for performing secondary intervention and drilling of a relief well to handle potential worst case discharge for the proposed prospect. Specific plans are integrated into the Helix Well Containment Groups procures to be approved and submitted with the Application for Pe rmit to Drill. Equipment availability, backup equipment and adaptability to the potential scenarios will need to be addressed based on the initial

### BLOWOUT SCENARIO
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Last Revised: 7/13/2011 Page 5 of 8
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### 5 site assessment of the seafloor conditions for intervention operations. Relief well equipment such as backup wellhead equipment and tubulars will be available in LLOG’s inventory for immediate deployment as needed to address frilling the relief well(s).

SITE SPECIFIC PROPOSED RELIEF WELL AND INTERVENTION PLANNING

No platform was considered for drilling relief wells for this location due to location, water depth and lack of appropriate platform within the area. For this reason a moor ed or DP MODU will be preferred / required.

Nearest production pipeline tie-ins are located ~3 miles from ENI MC 296 subsea manifold located on
MC 252 block. Other subsea manifold tie-in incl udes ~8 miles from ExxonMobil MC 211 and ~9 miles from ENI MC 299. Potential to utilize these lines in the event of a “cap and flow” scenario are possible.

Relief well sites have been initially identified to address blowout scenarios for the potential geologic targets for the proposed wells. A total of 8 relief well surface locations are proposed for the 2 drill sites in the Proposed Exploration Plan wells. These 2 drill sites are the most probable well sites for a development scenario. The additional EP locations can be drilled from the 2 selected drillsites if
needed. Based on actual seafloor state unforeseen at this time, the final location(s) may need to be
revised. The locations have been selected based on proximity to the targets sands and potential
shallow hazards.

Proposed EP Well Proposed Relief Well X (NAD 27) Y (NAD 27) MC 208 “D” OCS-G-32303 MC 208 NW Relief Well 1,197,995’ 10,441,996’ MC 208 NE Relief Well 1,203,377’ 10,440,148’ MC 208 SSE Relief Well 1,201,434’ 10,435,866’ MC 208SW Relief Well 1,198,871’ 10,436,666’ MC 253 “B” OCS-G-24062 MC 253 NW Relief Well 1,202,159’ 10,437,925’ MC 253 NE Relief Well 1,206,312’ 10,437,206’ MC 253 SE Relief Well 1,207,658’ 10,432,984’ MC 253 SW Relief Well5 1,201,626’ 10,432,984’



### RELIEF WELL RESPONSE TIME ESTIMATE

OPERATION TIME ESTIMAT E (DAYS)
IMMEDIATE RESPONSE

• safeguard personnel, render first-aid

• make initial notifications

• implement short term intervention (if possible)

• implement spill control

• develop Initial Action Plan 1

INTERIM REPSONSE

• establish Onsite Command Center and Emergency Management Team

• assess well c ontrol issues

• mobilize people and equipment (H elix DW Containment System)

• implement short term intervention and containment (if possible)

• develop Intervention Plan

• initiate relief well planning

• continue spill control measures 4

INTERVENTION AND CONTAIMENT OPERATIONS

### BLOWOUT SCENARIO
MC 208-253 Created by: S.L. Stegeman
Last Revised: 7/13/2011 Page 6 of 8
Confidential



### 6 • mobilize equipment and initiate intervention and containment operations

• perform TA operations and mobilize relief wells rig(s)

• finalize relief well plans, mobilize spud equipment, receive approvals

• continue spill control measures 14

RELIEF WELL(S) OPERATIONS

• continue intervention and containment measures

• continue spill control measures

• drill relief well (s) 75

PERFORM HYDRAULIC KILL OPERATIONS / SECURE BLOWNOUT WELL

• continue intervention and containment measures

• continue spill control measures

• perform hydraulic kill operati ons, monitor well, secure well 20

ESTIMATED TOTAL DAYS OF UNCONTROLLED FLOW 114 SECURE RELIELF WELL(S) / PERFORM P&A / TA OPERATIONS / DEMOBE 30

TOTAL DAYS 144

### BLOWOUT SCENARIO
MC 208-253 Created by: S.L. Stegeman
Last Revised: 7/13/2011 Page 7 of 8
Confidential



### 7

### BLOWOUT SCENARIO
MC 208-253 Created by: S.L. Stegeman
Last Revised: 7/13/2011 Page 8 of 8
Confidential



### 8Mississippi Canyon Block 253 (OCS-G 24062) 6/21/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 5 

# APPENDIX C
GEOLOGICAL AND GEOP HYSICAL INFORMATION (30 CFR Part 250.214 and 250.244)

A. Geological Description

Included as Attachment D are the geological targets and a narrative of trapping features proposed in this Plan. No change – Refer to Attachment D of the Initial EP for MC 253, OC S-G-24062 Lease and MC 208, OCS-G32303, Control No. N-09406 approved on October 22, 2009.



# B. Structure Contour Maps

Included as Attachment E are current structure maps (depth base and expressed in feet subsea) depicting the entire lease coverage area; drawn on top of the prospective hydrocarbon sands . The maps depict each proposed bottom hole location and applicab le geological cross section. No change –
Refer to Attachment E of the Init ial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009

.



# C. Interpreted Seismic Lines

Included as Attachment F is a copy of the migrated and annotated (shot points, time lines, well paths) deep se ismic line within 500 fe et of the surface location being proposed in this Plan. No change – Refer to Attachment F of the Initial EP for MC 253, OC S-G-24062 Lease and MC 208, OCS-G32303, Control No. N-09406 approved on October 22, 2009.



# D. Geological Structure Cross-Sections

An interpreted geological cross section depicting th e proposed well locations and depth of the proposed wells is included as Attachment G. Such cross section corresponds to each seismic line being submitted. No change – Refer
to Attachment G of the Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22,
2009.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 6 

# E. Shallow Hazards Report

C & C Technologies conducted a high re solution geophysical survey in Mississippi Canyon Blocks 208 and 253 dur ing May 2009 on behalf of LLOG Exploration Offshore, Inc. The purpose of the survey was to evaluate geologic conditions and inspect for potenti al hazards or constraints to lease development. Four (4) copies of the report was submitted to Minerals Management Service (BOEMRE) under separate cover. No change – Referto Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G32303, Control No. N-09406 approved on October 22, 2009.



# F. Shallow Hazards Assessment

Utilizing the 3D deep seismic explorati on data a shallow hazards analysis was prepared for the proposed surface locations, evaluating seafloor and subsurface geologic and manmade features and conditions, and is included as
Attachment H. No change – Refer to Attachment H of the Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N09406 approved on October 22, 2009.



# G. High Resolution Seismic Lines

LLOG provided exploration 3-D seismi c data for the evaluation of the proposed surface disturbance operations. No change – Refer to the Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# H. Stratigraphic Column

A generalized biostratigraphi c/lithostratigraphic column from the seafloor to the total depth of the proposed wells is included as Attachment I. No change
– Refer to Attachment I of the Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# I. Time vs Depth Tables

LLOG has determined that there is existing sufficient well control data for the target areas proposed in this plan; th erefore, tables providing seismic time versus depth for the proposed we ll locations are not required. No change –Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCSG-32303, Control No. N-09406 approved on October 22, 2009.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

61 

### Public Shallow Hazards Statement

– MC253

- A
July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood P ark Blvd.
New Orleans, LA 70213

- 2394

Attention:

Reference: Shallow Hazards Analysis Mississippi Canyon Block 253

OCS

- (G 24062 )

Ladies/Gentlemen:

LLOG Exploration Company contracted Gardline Surveys, Inc. to prepare a Well Clearance Letter for
the proposed MC253

- A well location in Block 253, Mississippi Canyon Area (OCS

- G 24062). This letter
addresses seafloor and shallow geologic conditions that may impact explorator y drilling operations
within 2,0 00ft of the proposed wellsite. The depth lim it of this geohazard assessment is to Horizon H40

+750ms at

- 9,769ft below sea surface (4,727ft below seabed).

This hazards summary letter is issued as a supplement to Gardline Report s No. 8025 entitled 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and 253, Volume 1

, May
2009 and Volume 2, MC253

- A and B Well Clearance Letters

, July 2011

.

**Seabed Hazards.** The seabed presents a sloping seabed exhibiting a number of regions of diapirically
induced uplift and seabed faulting. None of these features directly affect the proposed MC253

- A well

location.

There are no indications of seabed fluid seeps within 2,0 00ft of the well location.

No existing seabed infrastructure is located in the area.

**Sub**

**- Seabed Hazards.**  A Slight Risk of Sh allow Water Flow is interpreted where a number of
indicators of higher energy sandy interbeds are observed within the mid

- part of Unit D and throughout

Unit E.

A Slight Risk of Gas anomaly is observed at Horizon H30.

A Moderate Risk of Gas anomaly is obs erved within Unit E. Full well control is expected to have been
established by this level.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

62 

### Proposed MC253

- A Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 44' 17.68” North Easting 1,204,584 US f t E

Longitude 88° 21’ 37.34” West Northing 10,431,637 US ft N

FWL of Mississippi Canyon 253 744 US ft Inline 17301

FNL of Mississippi Canyon 253 6,923 US ft Crossline 14119

Water Depth:

- 5,042 ft Slope: 3.0° SE

Nearest Shoreline 53.99 Miles @ 298° 8’ 08.86’’

Port of Operation Fourchon 116.06 Miles @ 284° 5’ 34.73’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.43 Miles @ 65° 04’ 57.56’’



### Conclusions and Recommendations. A Slight Risk of Gas is interpreted at Horizon H30, Drilling

Caution is ad vised. A Slight Risk of Shallow Water Flow is interpreted within the mid part of Unit D and
throughout Unit E. Appropriate drilling methodology to contain a minor, non

- persistent shallow water flow event should be utilized when drilling this well.

Since rely, LLOG Exploration Company

Jaime Mata Geological Technician



# PUBLIC INFORMATIONLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

63 

### Public Shallow Hazards Statement

– MC253

- B
July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

- 2 394

Attention:

Reference: Shallow Hazards Analysis Mississippi Canyon Block 253

OCS

- (G 24062 )

Ladies/Gentlemen:

LLOG Exploration Company contracted Gardline Surveys, Inc. to prepare a Well Clearance Letter for
the proposed MC253

- B well locatio n in Block 253, Mississippi Canyon Area (OCS

- G 24062). This letter
addresses seafloor and shallow geologic conditions that may impact explorator y drilling operations
within 2,0 00ft of the proposed wellsite. The depth limit of this geohazard assessment is to Horizon H40

+ 750ms at

- 9,783ft below sea surface (4,861ft below seabed).

This hazards summary letter is issued as a supplement to Gardline Report s No. 8025 entitled 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and 253, Vo lume 1

, May

2009 and Volume 3 , MC253

- A and B Well Clearance Letters, July 2011

.

**Seabed Hazards.** The seabed presents a sloping seabed exhibiting a number of regions of diapirically
induced uplift and seabed faulting. None of these features directly affect the proposed MC253

- B well

location.

There are no indications of seabed fluid seeps within 2,0 00ft of the well location.

No existing seabed infrastructure is located in the area.

**Sub**

**- Seabed Hazards.**  A Slight Risk of Shallow Water Flow is interpreted w here a number of
indicators of higher energy sandy interbeds are observed within the mid

- part of Unit D and throughout

Unit E.

A Moderate Risk of Gas anomaly is observed within Unit E. Full well control is expected to have been
established by this level.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

64 

### Proposed MC253

- B Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 44' 48.98” North Easting 1,204,436 US ft E

Longitude 88° 21’ 39.41” West Northing 10,434,800 US ft N

FWL of Mississippi Canyon 253 596 US ft Inline 17334

FNL of Mississippi Canyon 253 3,760 US ft Crossline 14176

Water Depth:

- 4,922 ft Slope: 3.4° SE

Nearest Shoreline 53.99 Miles @ 298° 8’ 08.86’’

Port of Operation Fourchon 116.06 Miles @ 284° 5’ 34.73’’

Nearest Manned Platfo rm MC127 A

- Horn Mountain 20.21 Miles @ 66° 39’ 22.34’’



### Conclusions and Recommendations. A Slight Risk of Shallow Water Flow is interpreted within the
mid part of Unit D and throughout Unit E. Appropriate drilling methodology to contain a minor, non

p ersistent shallow water flow event should be utilized when drilling this well.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician



# PUBLIC INFORMATIONLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

90 

### Public Shallow Hazards Statement

– MC208

- C
July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

- 2394

Attention:

Reference: Shallow Hazards Analysis Mississippi Canyon Block 208

OCS

- (G 32303)

Ladies/Gentlemen:

LLOG Exploration Company contracted Gardline Surveys, Inc. to prepare a Well Clear ance Letter for the proposed MC208

- C well location in Block 208, Mississippi Canyon Area (OCS

- G 32303 ). This letter
addresses seafloor and shallow geologic conditions that may impact explorator y drilling operations
within 2,0 00ft of the proposed wellsite. The depth limit of this geohazard assessment is to Horizon H40

+750ms at

- 9,840ft below sea surface (5,090ft below seabed).

This hazards summary letter is issued as a supplement to Gardline Report s No. 8025 entitled 3D
Geohazard Assessment, Gulf of Mexi co, Mississippi Canyon, Blocks MC208 and 253, Volume 1

, May
2009 and Volume 2, MC208

- C

, D and E Well Clearance Letters, July 2011

.

**Seabed Hazards.** The seabed presents a sloping seabed exhibiting a number of regions of diapirically
induced uplift and seabe d faulting. None of these features directly affect the proposed MC208

- C well

location.

There are no indications of seabed fluid see ps within 2,0 00ft of the well location.

No existing seabed infrastructure is located in the area.

**Sub**

**- Seabed Hazards.**  A Slight Risk of Shallow Water Flow is interpreted where a number of
indicators of higher energy sandy interbeds are observed within the mid

- part of Unit D and throughout

Unit E

.

A Moderate Risk of Gas anomaly is observed within Unit E. Full well control i s expected to have been
established by this level.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

91 

### Proposed MC208

- C Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 45' 31.07” North Easting 1,202,630 US ft E

Longitude 88° 22’ 0.25” West North ing 10,439,071 US ft N

FEL of Mississippi Canyon 208 1

, 210 US ft Inline 17360

FSL of Mississippi Canyon 208 511 US ft Crossline 14281

Water Depth:

- 4,750 ft Slope: 2.2° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112. 44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.23 Miles @ 69° 8’ 40.69’’



### Conclusions and Recommendations. A Slight Risk of Shallow Water Flow is interpreted within the
mid pa rt of Unit D and throughout Unit E. Appropriat e drilling methodology to contain a minor, non

persistent shallow water flow event should be utilized when drilling this well.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician



# PUBLIC INFORMATIONLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

92 

### Public Shallow Hazards Stateme nt

– MC208

- D
July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

- 2394

Attention:

Reference: Shallow Hazards Analysis Mississippi Canyon Block 208

OCS

- (G 32303)

Ladies/Gentlemen:

LLOG Exploration Company contracted Gardline Surveys, Inc. to prepare a Well Clearance Letter for
the proposed MC208

- D well location in Block 208, Mississippi Canyon Area (OCS

- G 32303 ). This letter
addresses seafloor and shallow geologic conditions that may impact explorator y drilling operations
within 2,0 00ft of the proposed wellsite. The depth limit of this geohazard assessment is to Horizon H40

+ 750ms at

- 9,752ft below sea surface (5,045ft below seabed).

This hazards summary letter is issued as a su pplement to Gardline Report s No. 8025 entitled 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and 253, Volume 1

, May

2009 and Volume 2, MC208

- C

, D and E Well Clearance Letters, July 2011

.

**Seabed Hazards.** The seabed presents a sl oping seabed exhibiting a number of regions of diapirically induced uplift and seabed faulting. None of these features directly affect the proposed MC208

- D well

location.

There are no indications of seabed fluid seeps within 2,0 00ft of the well location.

No existing seabed infrastructure is located in the area.

**Sub**

**- Seabed Hazards.**  A Slight Risk of Shallow Water Flow is interpreted where a number of
indicators of higher energy sandy interbeds are observed within the mid

- part of Unit D and throughout

Un it E.

A Slight Risk of Gas anomaly is observed within Unit E. Full well control is expected to have been
established by this level.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

93 

### Proposed MC208

- D Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 45' 31.31” North Easting 1,200,850 US ft E

Longitude 88° 22’ 20.26” West Northing 10,439,116 US ft N

FEL of Mississippi Canyon 208 2

, 990 US ft Inline 17342

FSL of Mississippi Canyon 208 556 US ft Crossline 14312

Water Depth:

- 4,707 ft Slope: 1.8° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.54 Miles @ 69° 30’ 5.93’’



### Conclusions and Recommendations. A Slight Risk of Shallow Water Flow is interpreted within the mid part of Unit D and throughout Unit E. Appropriate drilling methodology to contain a minor, non

persistent shallow water flow event should be utilized when drilling this well.

Sincerely, LLOG Exploration Company

Jai me Mata Geological Technician



# PUBLIC INFORMATIONLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

94 

### Public Shallow Hazards Statement

– MC208

- E
July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

- 2394

Attention:

Reference: S hallow Hazards Analysis Mississippi Canyon Block 208

OCS

- (G 32303)

Ladies/Gentlemen:

LLOG Exploration Company contracted Gardline Surveys, Inc. to prepare a Well Clearance Letter for
the proposed MC208

- E well location in Block 208, Mississippi Canyon A rea (OCS

- G 32303 ). This letter
addresses seafloor and shallow geologic conditions that may impact explorator y drilling operations
within 2,0 00ft of the proposed wellsite. The depth limit of this geohazard assessment is to Horizon H40

+750ms at

- 9,637ft b elow sea surface (4,992ft below seabed).

This hazards summary letter is issued as a supplement to Gardline Report s No. 8025 entitled 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and 253, Volume 1

, May
2009 and Volume 2, MC208

- C

, D and E Well Clearance Letters

, July 2011

.

**Seabed Hazards.** The seabed presents a sloping seabed exhibiting a number of regions of diapirically induced uplift and seabed faulting. None of these features directly affect the proposed MC208

- E well

locatio n.

There are no indications of seabed fluid seeps wit hin 2,0 00ft of the well location.

No existing seabed infrastructure is located in the area.

**Sub**

**- Seabed Hazards.**  A Slight Risk of Shallow Water Flow is interpreted where a number of
indicators of high er energy sandy interbeds are observed within the mid

- part of Unit D and throughout

Unit E

.

A Moderate Risk of Gas anomaly is observed within Unit E. Full well control is expected to have been
established by this level.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

95 

### Proposed MC208

- E Location (Sur face)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 46' 48.01” North Easting 1,203,299 US ft E

Longitude 88° 21’ 53.74” West Northing 10,446,834 US ft N

FEL of Mississippi Canyon 208 541 US ft Inline 17451

FNL of Mississippi Canyon 208 7,566 US ft Crossline 14403

Water Depth:

- 4,645 ft Slope: 3.8° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 19.63 Mil es @ 73° 1’ 33.83’’



### Conclusions and Recommendations. A Slight Risk of Shallow Water Flow is interpreted within the
mid part of Unit D and throughout Unit E. Appropriate drilling methodology to contain a minor, non

persistent shallow water flow event s hould be utilized when drilling this well.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician



# PUBLIC INFORMATIONLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

54 

### ANCHORING ASSESSMENT

**– Proposed MC253** 

**- A Well Location** 

Proposed MC253

- A Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 44' 17.68” North Easting 1,204,584 US ft E

Longitude 88° 21’ 37.34” West Northing 10,431,637 US ft N

FWL of Mississippi Canyon 253 744 US ft Inline 17301

FNL of Mississippi Canyon 253 6,923 US ft Crossline 14119

Water Depth:

- 5,0 42 ft Slope: 3.0° SE

Nearest Shoreline 53.99 Miles @ 298° 8’ 08.86’’

Port of Operation Fourchon 116.06 Miles @ 284° 5’ 34.73’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.43 Miles @ 65° 04’ 57.56’’



### Anchor Pattern: LLOG Exploration Company has not as yet issued a specific anchor spread to retain the drilling rig. The anchor radius illustrated on Plats and Charts for the proposed Block MC253

- A
wellsite is the maximum predicted radius of 12,000ft plus a 1,000ft Buffer Zone . An anchor

spread pattern can be designed as an addendum to this report, if required, after the drilling rig
has been identified. The anchor pattern will be designed to avoid any infrastructure and
potentially sensitive seabed habitats.

Bathymetry
Water depth at the proposed M C253

- A well location is

- 5,042ft below sea

- surface. The
seafloor deepens to the southeast at 3.0°.

Seabed Morphology, Faults and Sensitive Sessile B enthic Communities
The seabed within the radius of the proposed anchor pattern deepens to the southeast.

The proposed well location is located on the northwest flank of an elongate salt withdrawal

mini

- basin. Anchors placed to the southeast could contact the uplifted region of seabed due to underlying salt diapirism. Slightly firmer sediments may occur in this region which may
reduce anchor penetration.

Localized areas considered favourable for sensitive sessile benthic community development occur in the extreme southeast of the 12,000ft anchor radius. These regions will be avoided
by at least 250ft by al l anchoring operations.

A seabed fault is observed 3,800ft to the north, but will not adversely affect anchoring
operations.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

55 

### No other features, which may impact anchor emplacement, are observed within the 12,000ft

anchor radius.

All anchors will be posi tioned using a precise DGPS system.

Charts 1

, 2 , and 3 illustrate an anchor radius of 12,000ft for the proposed MC253

- A Location
at 1”=1,000ft. Proposed MC2 53

- A Location Anchor Plat (overleaf) illustrates the anchor radius
at 1”=4,000ft.

### 0 8

, 0 0 0 1 6

, 0 0 0 4

, 0 0 0 F e e t

0 2

, 0 0 0 4

, 0 0 0 1

, 0 0 0 M e t e r s C h a r t s c a l e 1 " = 4

, 0 0 0 ' 

# A n c h o r P l a t ( M C 2 5 3

- A )

P r o p o s e d M C 2 5 3

- A W e l l L o c a t i o n ( 1

, 2 0 4

, 5 8 4 f t E / 1 0

, 4 3 1

, 6 3 7 f t N )

P r o p o s e d M C 2 5 3

- B W e l l L o c a t i o n ( 1

, 2 0 4

, 4 3 6 f t E / 1 0

, 4 3 4

, 8 0 0 f t N ) P r o p o s e d M C 2 0 8

- C W e l l L o c a t i o n ( 1

, 2 0 2

, 6 3 0 f t E / 1 0

, 4 3 9

, 0 7 1 f t N )

®33 3

3

®33 3

3 ®33 3

3 D e p t

h i n f e e t b e l o w s e a s u r f a c e t o s e a b e d

,

c o n t o u r e d a t 1 0 0 f t i n t e r v a l s 

# ±

- 5 2 0 0 ®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 1 2

, 0 0 0 f t R a d i u s 2 , 0 0 0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e P r o p o s e d M C 2 5 3

- A

M C 2 5 2

- 1 P r o p o s e d M C 2 5 3

- B P r o p o s e d M C 2 0 8

- C P r o p o s e d M C 2 0 8

- D

- 4 9 0 0 - 5 0 0 0

- 5 1 0 0 - 4 8 0 0

- 4 7 0 0

- 5 2 0 0 - 4 6 0 0

- 4 5 0 0 - 4 4 0 0

- 5 3 0 0 - 4 3 0 0

- 4 8 0 0

- 4 9 0 0 - 4 8 0 0 - 4 9 0 0 - 4 3 0 088°20'0"W88°22'0"W88°24'0"W

2 8 ° 4 6 ' 0 " N

2 8 ° 4 4 ' 0 " N1,190,0001,200,0001,210,000 1 0

, 4 2 0

, 0 0 0 1 0

, 4 3 0

, 0 0 0 1 0

, 4 4 0

, 0 0 0

P r o p o s e d M C 2 0 8

- D W e l l L o c a t i o n ( 1

, 2 0 0

, 8 5 0 f t E / 1 0

, 4 3 9

, 1 1 6 f t N ) ®33 3

3 S e a b e d f a u l t i n t e r s e c t i o n t i c k d e n o t e s d o w n t h r o w n s i d e

F l u i d e x p u l s i o n s i t e s f a v o r a b l e f o r p o s s i b l e

s e n s i t i v e s e s s i l e b e n t h i c c o m m u n i t y d e v e l o p m e n t

U p p e r a n d l o w e r l i m i t s o f e s c a r p m e n tLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

57 

### ANCHORING ASSESSMENT

**– Proposed MC253** 

**- B Well Location** 

Proposed MC253

- B Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 44' 48.98” North Easting 1,204,436 US ft E

Longitude 8 8° 21’ 39.41” West Northing 10,434,800 US ft N

FWL of Mississippi Canyon 253 596 US ft Inline 17334

FNL of Mississippi Canyon 253 3,760 US ft Crossline 14176

Water Depth:

- 4,922 ft Slope: 3.4° SE

Nearest Shoreline 53.99 Miles @ 298° 8’ 08.86’’

Port of Operation Fourchon 116.06 Miles @ 284° 5’ 34.73’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.21 Miles @ 66° 39’ 22.34’’



### Anchor Pattern: LLOG Exploration Company has not as yet issued a specific anchor spread to retain the
drilling rig. The ancho r radius illustrated on Plats and Charts for the proposed Block MC253

- B
wellsite is the maximum predicted radius of 12,000ft plus a 1,000ft Buffer Zone . An anchor

spread pattern can be designed as an addendum to this report, if required, after the drillin g rig has been identified. The anchor pattern will be designed to avoid any infrastructure and
potentially sensitive seabed habitats.

Bathymetry
Water depth at the proposed MC253

- B well location is

- 4,922ft below sea

- surface. The
seafloor deepens to t he southeast at 3.4°.

Seabed Morphology, Faults and Sensitive S es sile B enthic Communities
The seabed within the radius of the proposed anchor pattern deepens to the southeast.

The proposed well location is located on the northwest flank of an elongate s alt withdrawal

mini

- basin. Anchors placed to the southeast and ENE could contact the uplifted region of seabed due to underlying salt diapirism. Slightly firmer sediments may occur in this region
which may reduce anchor penetration.

No areas within the anchor radius area have the potential for sensitive sessile benthic

communities.

A seabed fault i s observed 700ft to the north, but is not interpreted to be a problem to
anchoring.

No other features, which may impact anchor emplacement, are observed with in the 12,000ftLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

58 

### anchor radius.

All anchors will be positioned using a precise DGPS system.

Charts 1

, 2 , and 3 illustrate an anchor radius of 12,000ft for the proposed MC253

- B Location
at 1”=1,000ft. Proposed MC253

- B Location Anchor Plat (overleaf) illus trates the anchor radius
at 1”=4,000ft.

### 0 8

, 0 0 0 1 6

, 0 0 0 4

, 0 0 0 F e e t

0 2

, 0 0 0 4

, 0 0 0 1

, 0 0 0 M e t e r s C h a r t s c a l e 1 " = 4

, 0 0 0 ' 

# A n c h o r P l a t ( M C 2 5 3

- B )

P r o p o s e d M C 2 5 3

- A W e l l L o c a t i o n ( 1

, 2 0 4

, 5 8 4 f t E / 1 0

, 4 3 1

, 6 3 7 f t N )

P r o p o s e d M C 2 5 3

- B W e l l L o c a t i o n ( 1

, 2 0 4

, 4 3 6 f t E / 1 0

, 4 3 4

, 8 0 0 f t N ) P r o p o s e d M C 2 0 8

- C W e l l L o c a t i o n ( 1

, 2 0 2

, 6 3 0 f t E / 1 0

, 4 3 9

, 0 7 1 f t N )

®33 3

3

®33 3

3 ®33 3

3 D e p t

h i n f e e t b e l o w s e a s u r f a c e t o s e a b e d

,

c o n t o u r e d a t 1 0 0 f t i n t e r v a l s 

# ±

- 5 2 0 0 ®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 1 2

, 0 0 0 f t R a d i u s 2 , 0 0 0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e P r o p o s e d M C 2 5 3

- A

M C 2 5 2

- 1 P r o p o s e d M C 2 5 3

- B P r o p o s e d M C 2 0 8

- C P r o p o s e d M C 2 0 8

- D P r o p o s e d M C 2 0 8

- E

- 4 9 0 0 - 5 0 0 0 - 4 8 0 0

- 5 1 0 0 - 4 7 0 0

- 5 2 0 0 - 4 6 0 0 - 4 5 0 0

- 4 4 0 0 - 4 3 0 0 - 4 2 0 0 - 4 1 0 0

- 4 8 0 0

- 4 9 0 0 - 4 8 0 0 - 4 9 0 0 - 4 3 0 088°20'0"W88°22'0"W88°24'0"W

2 8 ° 4 6 ' 0 " N

2 8 ° 4 4 ' 0 " N1,190,0001,200,0001,210,000 1 0

, 4 3 0

, 0 0 0 1 0

, 4 4 0

, 0 0 0

P r o p o s e d M C 2 0 8

- D W e l l L o c a t i o n ( 1

, 2 0 0

, 8 5 0 f t E / 1 0

, 4 3 9

, 1 1 6 f t N ) ®33 3

3 S e a b e d f a u l t i n t e r s e c t i o n t i c k d e n o t e s d o w n t h r o w n s i d e

F l u i d e x p u l s i o n s i t e s f a v o r a b l e f o r p o s s i b l e

s e n s i t i v e s e s s i l e b e n t h i c c o m m u n i t y d e v e l o p m e n t

U p p e r a n d l o w e r l i m i t s o f e s c a r p m e n tLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

80 

### ANCHORING ASSESSMENT

**– Proposed MC208** 

**- C**  **Well Location**

Proposed MC208

- C Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 45' 31.07” North Easting 1,202,630 US ft E

Longitude 88° 22’ 0.25” West Northing 10,439,071 US ft N

FEL of Mississippi Canyon 208 1

, 210 US ft Inline 17360

FSL of Mississippi Canyon 208 511 US ft Crossline 14281

Water Depth:

- 4,750 ft Slope: 2.2° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.23 Miles @ 69° 8’ 40.69’’



### Anchor Pattern: LLOG Exploration Company has not as ye t issued a specific anchor spread to retain the drilling rig. The anchor radius illustrated on Plats and Charts for the proposed Block MC208

- C
wellsite is the maximum predicted radius of 12,000ft plus a 1,000ft Buffer Zone . An anchor

spread pattern can b e designed as an addendum to this report, if required, after the drilling rig
has been identified. The anchor pattern will be designed to avoid any infrastructure and
potentially sensitive seabed habitats.

Bathymetry
Water depth at the proposed MC208

- C well location is

- 4,750ft below sea

- surface. The
seafloor deepens to the southeast at 2.2°.

Seabed Morphology, Faults and Sensitive Sessile B enthic Communities
The seabed within the radius of the proposed anchor pattern deepens to the southeast.

The p roposed well location is located upslope from an elongated mini

- ba sin caused by sub

salt uplift to the north, south and east. Seabed is relatively even and predominantly
featureless, except for in the extreme ENE of the anchor radius where the lower flank of the
salt uplift occurs. The lower escarpme nt region may exhibit slightly firmer sediment types
which may reduce anchor penetration.

No areas within the anchor radius area have the potential for sensitive sessile benthic

communities.

Seabed faults ar e observed to the southeast

, but are not interpreted to affect anchoring

.

No other features, which may impact anchor emplacement, are observed within the 12,000ftLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

81 

### anchor radius.

All anchors will be positioned using a precise DGPS system.

Charts 1

, 2

, and 3 illustrate an anchor radius of 12,000ft for the proposed MC208

- C Location
at 1”=1,000ft. Proposed MC208

- C Location Anchor Plat (overleaf) illustrates the anchor radius
at 1”=4,000ft.

### 0 8,000 16,000 4,000 Feet

0 2,000 4,000 1,000 Meters Chart scale 1" = 4,000' 

# Anchor Plat (MC208-C)

Proposed MC253-A Well Location (1,204,584ft E / 10,431,637ft N)

Proposed MC253-B Well Location (1,204,436ft E / 10,434,800ft N) Proposed MC208-C Well Location (1,202,630ft E / 10,439,071ft N)

®33 3

3

®33 3

3 ®33 3

3 Depth in feet below sea surface to seabed,

contoured at 100ft intervals 

# ±

-4800 ®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 1 2

, 0 0 0 f t R a d i u s 2 , 0 0

0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e Proposed MC253-A

MC252-1 Proposed MC253-B Proposed MC208-C Proposed MC208-D Proposed MC208-E

-5000 -4900 -4800 -4700

-5100 -4600

-4500

-4400

-5200 -4300

-4200 -4100

-4800 -4900 -430088°20'0"W88°22'0"W88°24'0"W

28°46'0"N

28°44'0"N1,190,0001,200,0001,210,000 10,430,000 10,440,000 10,450,000

Proposed MC208-D Well Location (1,200,850ft E / 10,439,116ft N)

Proposed MC208-E Well Location (1,203,299ft E, 10,446,834ft N) ®33 3

3

®33 3

3 Seabed fault intersection tick denotes

downthrown side

Upper and lower limits of escarpmentLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

83 

### ANCHORING ASSESSMENT

**– Proposed MC208** 

**- D**  **Well Location**

Proposed MC208

- D Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 45' 31.31” North Easting 1,200,850 US ft E

Longitude 88° 22’ 20.26” West Northing 10,439,116 US ft N

FEL of Mississippi Canyon 208 2

, 990 US ft Inline 17342

FSL of Mississippi Canyon 208 556 US ft Crossline 14312

Water Depth:

- 4,707 ft Slope: 1.8° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.54 Miles @ 69° 30’ 5.93’’



### Anchor Pattern: LLOG Exploration Company has not as yet issued a specific anchor spread to retain the drilling rig. The anchor radius illustrated on Plats and Charts for the proposed Block MC208

- D
wellsite is the maximum predicted radius of 12,000ft plus a 1,000ft Buffer Zone . An anchor

spread pattern can be designed as an addendum to this report, if required, after the drilling rig
has been identified. The anchor patte rn will be designed to avoid any infrastructure and
potentially sensitive seabed habitats.

Bathymetry
Water depth at the proposed MC208

- D well location is

- 4,707ft below sea

- surface. The
seafloor deepens to the southeast at 1.8°.

Seabed Morphology, Fa ults and Sensitive Sessile B enthic Communities
The seabed within the radius of the proposed anchor pattern deepens to the southeast.

The proposed well location is located upslope from an elongated mini

- basin caused by sub

salt uplifting to the north, sou th and east. No major changes in seabed morphology that would impact anchoring are observed within the 12,000ft radius.

No areas within the anchor radius area have the potential for sensitive sessile benthic

communities.

Seabed faults are observed to th e northwest and sout hwest, but are not interpreted as a
problem to anchoring.

No other features, which may impact anchor emplacement, are observed within the 12,000ft

anchor radius.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

84 

### All anchors will be positioned using a precise DGPS system.

Charts 1

, 2 , and 3 illustrate an anchor radi us of 12,000ft for the proposed MC208

- D Location
at 1”=1,000ft. Proposed MC208

- D Location Anchor Plat (overleaf) illustrates the anchor radius
at 1”=4,000ft.

### 0 8,000 16,000 4,000 Feet

0 2,000 4,000 1,000 Meters Chart scale 1" = 4,000' 

# Anchor Plat (MC208-D)

Proposed MC253-A Well Location (1,204,584ft E / 10,431,637ft N)

Proposed MC253-B Well Location (1,204,436ft E / 10,434,800ft N) Proposed MC208-C Well Location (1,202,630ft E / 10,439,071ft N)

®33 3

3

®33 3

3 ®33 3

3 Depth in feet below sea surface to seabed,

contoured at 100ft intervals 

# ±

-4800 ®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 1 2

, 0 0 0 f t R a d i u s 2 , 0 0 0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e
Proposed MC253-A

MC252-1 Proposed MC253-B Proposed MC208-C Proposed MC208-D Proposed MC208-E

-5000

-4900 -4800 -4700

-5100 -4600 -4500 -4400

-5200 -4300

-4200 -4100

-490088°20'0"W88°22'0"W88°24'0"W

28°46'0"N

28°44'0"N1,190,0001,200,0001,210,000 10,430,000 10,440,000 10,450,000

Proposed MC208-D Well Location (1,200,850ft E / 10,439,116ft N)

Proposed MC208-E Well Location (1,203,299ft E, 10,446,834ft N) ®33 3

3

®33 3

3 Seabed fault intersection tick denotes

downthrown side

Upper and lower limits of escarpmentLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

86 

### ANCHORING ASSESSMENT

**– P**  **roposed MC208**

**- E**  **Well Location**

Proposed MC208

- E Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 46' 48.01” North Easting 1,203,299 US ft E

Longitude 88° 21’ 53.74” West Northing 10,446,834 US ft N

FEL of Mississippi Canyon 208 541 US ft Inline 17451

FNL of Mississippi Canyon 208 7,566 US ft Crossline 14403

Water Depth:

- 4,645 ft Slope: 3.8° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9 ’’

Nearest Manned Platform MC127 A

- Horn Mountain 19.63 Miles @ 73° 1’ 33.83’’



### Anchor Pattern: LLOG Exploration Company has not as yet issued a specific anchor spread to retain the drilling rig. The anchor radius illustrated on Plats and Charts for the proposed Block MC208

- E
wellsite is the maximum predicted radius of 12,000ft plus a 1,000ft Buffer Zone . An anchor

spread pattern can be designed as an addendum to this report, if required, after the drilling rig
has been identified. The anchor pattern wi ll be designed to avoid any infrastructure and
potentially sensitive seabed habitats.

Bathymetry
Water depth at the proposed MC208

- E well location is

- 4,645ft below sea

- surface. The
seafloor deepens to the southeast at 3.8°.

Seabed Morphology, Faults and Sensitive Sessile B enthic Communities
The seabed within the radius of the proposed anchor pattern deepens to the southeast.

The proposed well location is located upslope from an elongated mini

- basin caused by sub

salt uplifting to the north, south an d east. Anchors could contact the escarpments surrounding
the seabed uplifts to the north and east of the proposed location. These escarpment and uplift
regions may exhibit slightly firmer sediment types which may reduce anchor penetration.

No areas wit hin the anchor radius area have the potential for sensitive sessile benthic

communities.

Seabed faults are observed to the northwest and southwest

, but are not interpreted to affect
anchoring.

No other features, which may impact anchor emplacement, are o bserved within the 12,000ftLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

87 

### anchor radius.

All anchors will be positioned using a precise DGPS system.

Charts 1

, 2 , and 3 illustrate an anchor radius of 12,000ft for the proposed MC208

- E Location
at 1”=1,000ft. Proposed MC208

- E Location Anchor Plat (ove rleaf) illustrates the anchor radius
at 1”=4,000ft.

### 0 8

, 0 0 0 1 6

, 0 0 0 4

, 0 0 0 F e e t

0 2

, 0 0 0 4

, 0 0 0 1

, 0 0 0 M e t e r s C h a r t s c a l e 1 " = 4

, 0 0 0 ' 

# A n c h o r P l a t ( M C 2 0 8

- E )

P r o p o s e d M C 2 5 3

- B W e l l L o c a t i o n ( 1

, 2 0 4

, 4 3 6 f t E / 1 0

, 4 3 4

, 8 0 0 f t N ) P r o p o s e d M C 2 0 8

- C W e l l L o c a t i o n ( 1

, 2 0 2

, 6 3 0 f t E / 1 0

, 4 3 9

, 0 7 1 f t N )

®33 3

3 ®33 3

3 D e p t

h i n f e e t b e l o w s e a s u r f a c e t o s e a b e d

,

c o n t o u r e d a t 1 0 0 f t i n t e r v a l s 

# ±

- 4 8 0 0 ®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 1 2

, 0 0 0 f t R a d i u s 2 , 0 0

0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e

P r o p o s e d M C 2 5 3

- B P r o p o s e d M C 2 0 8

- C P r o p o s e d M C 2 0 8

- D P r o p o s e d M C 2 0 8

- E - 4

3 0 0

- 4 4 0 0

- 4 5 0 0

- 4 6 0 0 - 4 8 0 0 - 4 7 0 0 - 4 2 0 0 - 4

1 0 0

- 4 0 0 0 - 3 9 0 0

- 4 9 0 0 - 3 8 0 0

- 3 7 0 0

- 3 6 0 0

- 5 0 0 0 - 3 5 0 0 - 3 4 0 0

- 5 1 0 0 - 4

1 0 0

- 4 3 0 0 - 4 1 0 088°20'0"W88°22'0"W88°24'0"W

2 8 ° 4 8 ' 0 " N

2 8 ° 4 6 ' 0 " N1,190,0001,200,0001,210,000 1 0

, 4 4 0

, 0 0 0 1 0

, 4 5 0

, 0 0 0 1 0

, 4 6 0

, 0 0 0

P r o p o s e d M C 2 0 8

- D W e l l L o c a t i o n ( 1

, 2 0 0

, 8 5 0 f t E / 1 0

, 4 3 9

, 1 1 6 f t N )

P r o p o s e d M C 2 0 8

- E W e l l L o c a t i o n ( 1

, 2 0 3

, 2 9 9 f t E

, 1 0

, 4 4 6

, 8 3 4 f t N ) ®33 3

3

®33 3

3 S e a b e d f a u l t i n t e r s e c t i o n t i c k d e n o t e s d o w n t h r o w n s i d e

A r e a o f i n t e n s i v e s e a b e d f a u l t i n g d u e

t o s a l t u p l i f t

U p p e r a n d l o w e r l i m i t s o f e s c a r p m e n tMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 7 

# APPENDIX D
HYDROGEN SULFIDE (H2S) INFORMATION (30 CFR Part 250.215 and 250.245)

A. Concentration

LLOG does not anticipate encountering H2S while conducting the proposed exploratory operations provided for under this plan.



# B. Classification

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.

• By letter dated October 23, 2009, MMS in accordance with 30 CFR 250.490 (c) classified the area in whic h the proposed operations are to
be conducted as “H2S absent”.



# C. H2S Contingency Plan

Not applicable for the proposed operations.



# D. Modeling Report

Not applicable to the proposed operations.Mississippi Canyon Block 253 (OCS-G 24062) 7/7/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 8 

# APPENDIX E BIOLOGICAL, PHYSICAL AND SOCIOECONOMIC
INFORMATION (30 CFR Part 250.216 and 250.247)

A. High-Density Deepwater Benthi c Communities Information

Maps and analysis were submitted unde r separate cover with the Initial
EP. Features or areas that coul d support high-density chemosynthetic
communities are not located within 500’ of each proposed muds and cuttings discharge locati on. However, in the appr oval letter dated October 23, 2009, MMS review indicates that th e proposed activities are in the vicinity of areas that could s upport high-density chemosynthetic communities. LLOG will use a state-of-the-art positioning system on the anchor handling vessel to ensure that any seafloor disturbance resulting from the use of anchors (including that caused by the anchors, anchor chains, and wire ropes) does not oc cur within 250’ of such areas.

LLOG will submit plats for proposed well MC 253A and proposed well MC 253B, which depict the “as-placed” location of all an chors with DGPS accuracy to the BOEMRE Gulf of Mexico OCS Re gion and BOEMRE New Orleans District offices as requir ed in approval letter dated October 23, 2009.

See attached Sensitive Sessile Benthic Community Summary.

Refer to Initial EP approval letter dated October 23, 2009 for MC253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N09406 approved on October 22, 2009.



# B. Topographic Features Map

The activities proposed in this Plan are not affected by a topographic
feature.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# C. Topographic Features Statement (Shunting)

The activities proposed in this Plan are not affected by a topographic feature; therefore, LLOG is not require d to shunt drill cuttings and drill
fluids.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 9 

## No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# D. Live Bottoms (Pinnacle Trend) Map

Mississippi Canyon Blocks 253 and 208 are not located within the vicinity of a proposed live bottom (Pinnacle trend) area.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009

.



# E. Live Bottoms (Low Relief) Map

Mississippi Canyon Blocks 253 and 208 are not located within the vicinity of a proposed live bottom (Low Relief) area.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# F. Potentially Sensitive Biological Features Map

Mississippi Canyon Blocks 253 and 208 are not located within the vicinity of a proposed sensitive biological feature area.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009

.



# G. Remotely Operated Vehicle (R OV) Monitoring Survey Plan

Mississippi Canyon Blocks 253 and 208 ar e not located wi thin an area where ROV surveys are required.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 10 

## H. 

# Threatened or Endangered Speci es, Critical Habitat, and
Marine Mammal Information

.

Proposed activities in MC 253 and 208 ar e not located in the presence of federally listed threatened or enda ngered species and critical habitat designated under the ESA and mari ne mammal protected under the

MMPA.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.

I. 

# Archaeological Report

C & C Technologies Survey Services conducted an Archaeological and Hazard Study for LLOG Explorati on Offshore, Inc. in May, 2009 including Mississippi Canyon Blocks 253 and 208. This survey was submitted to Minerals Management Service under separate cover.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# J. Air and Water Quality Information

Not applicable to proposed operations.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# K. Socioeconomic Information

Not applicable to proposed operations.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

66 

### Sensitive S es s ile B enthic Community Statement

– MC253

- A



## LLOG Exploration Company

July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

Reference: Sensitive Sessile B enthic Community Summary
Mississipp i Canyon, Block 253

OCS

- (G 24062 )

Ladies/Gentlemen: Gardline Surveys Inc was contracted by LLOG Exploration Company to prepare a Site Clearance
Letter for the proposed MC253

- A location in Mississippi Canyon , Block 253 (OCS

- G 24062). This letter

addresse s location proximity to potential sensitive sessile benthic community sites. LLOG Exploration Company indicates that this well will be drilled with a semi

- submersible rig with anchors.

This sensitive sessile benthic community summary letter is issued as a supplement to Gardline Report s

No. 8025 entitled 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and

253, Volume 1

, May 2009 and Volume 3, MC253

- A an d B Well Clearance Letters, July 2011

. A Biological, Physical and Socioeconomi c Map and Plat are included at the end of this appendix
illustrating the areas of potential seabed impact

.

**Potential Sensitive Sessile B**  **enthic Communities.** 
Features or areas that could support high

- density sensitive sessile benthic communities are **not** l ocated
within 2,0 00 feet of any proposed mud and cuttings discharge location.

Features or areas that could support high

- density sensitive sessile benthic communities are located in
the extreme southeast of the 12,000ft anchor radius. These regions will b e avoided by at least 250ft by
all anchoring operations.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

67 

### Proposed MC253

- A Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 44' 17.68” North Easting 1,204,584 US ft E

Longitude 88° 21’ 37.3 4” West Northing 10,431,637 US ft N

FWL of Mississippi Canyon 253 744 US ft Inline 17301

FNL of Mississippi Canyon 253 6,923 US ft Crossline 14119

Water Depth:

- 5,042 ft Slope: 3.0° SE

Nearest Shoreline 53.99 Miles @ 298° 8’ 08.86’’

Port of Operation Fourchon 116.06 Miles @ 284° 5’ 34.73’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.43 Miles @ 65° 04’ 57.56’’



### Nearest potential sensitive sessile benthic community to the proposed location is a localized fluid
expulsion site approximately 1 0

, 9 0 0ft southeast of the proposed well location.

**Conclusions and Recommendations:** Features or areas that could support high

- density sensitive

sessile benthic communities are located in the extreme southeast of the 12,000ft anchor radius. These
regions will be avoided by at least 250ft by all anchoring operations.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician

# ±

®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 Proposed MC253-A Proposed MC253-B Proposed MC208-C

-4900 -4800

-5000

-5100 -4700 -4600 -4500

-5200 -4400

-4300 -4200

-5300 -4100

-4800

-4900 -4800 -4900 -4300

Proposed MC208-D Proposed MC208-E

MC252-188°19'0"W88°20'0"W88°21'0"W88°22'0"W88°23'0"W88°24'0"W

28°46'0"N

28°45'0"N

28°44'0"N

28°43'0"N

28°42'0"N1,190,0001,200,0001,210,0001,220,000 10,420,000 10,430,000 10,440,000

0 4,000 8,000 2,000 Feet

0 1,000 2,000 500 Meters 

### Chart scale 1" = 4,000' 

# Biological, Physical & Socio-Economic Proposed MC208-C Well Location (1,202,630ft E / 10,439,071ft N) ®33 3

3 Depth in feet below sea surface to seabed,

contoured at 100ft intervals -4,900

Proposed MC208-D Well Location (1,200,850ft E / 10,439,116ft N)

Proposed MC208-E Well Location (1,203,299ft E, 10,446,834ft N) ®33 3

3

®33 3

3 

### MISSISSIPPI CANYON BLOCK 253 (OCS-G24062)

Proposed MC253-A Well Location (1,204,584ft E / 10,431,637ft N)

Proposed MC253-B Well Location (1,204,436ft E / 10,434,800ft N) ®33 3

3

®33 3

3 Seabed fault intersection tick denotes

downthrown side

Fluid expulsion sites favorable for possible sensitive sessile benthic community development 1 2

, 0 0 0 f t R a d i u s 1

, 0 0 0 f t B u f f e r Z o n e 2 , 0 0

0 f t R a d i u

s

1 , 0 0 0 f t B

u f f e r Z

o n e

1 2 , 0 0 0 f t R

a d i u s 2

, 0 0

0 f t R a d i u

sLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

69 

### Sensitive Sessile B enthic Community Statement

– MC253

- B



## LLOG Exploration Company

July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

Reference: Sensitive Sessile B enthic Community Summary Mississippi Canyon, Block 208

OCS

- (G 24062 )

Ladies/Gentlemen:

Gardli ne Surveys Inc was contracted by LLOG Exploration Company to prepare a Site Clearance
Letter for the proposed MC253

- B location in Mississippi Canyon, Block 253, (OCS

- G 24062). This
letter addresses location proximity to potential sensitive sessile benthic community sites. LLOG Exploration Company indicates that this well will be drilled with a semi

- submersible rig with anchors.

This sensitive sessile benthic community summary letter is issued as a supplement to Gardline Reports

No. 8025 entitled 3D Geoha zard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and 253, Volume 1, May 2009 and Volume 3, MC253

- A an d B Well Clearance Letters, July 2011

. A Biological, Physical and Socioeconomic Map and Plat are included at the end of this appendix

ill ustrating the areas of potential seabed impact

.

**Potential Sensitive sessile benthic**  **Communities.**
Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within 2,0 00 feet of any proposed mud and cuttings d ischarge location.

Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within the maximum anchor radius of 12,000ft.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blocks 208 & 253

– Proposed MC253

- A and B Well Lo cations Volume 3

70 

### Proposed MC253

- B Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 44' 48.98” North Easting 1,204,436 US ft E

Longitude 88° 21’ 39.41” West Northing 10,434,800 US ft N

FWL of Mississippi Canyon 253 596 US ft Inline 17334

FNL of Mississippi Canyon 253 3,760 US ft Crosslin e 14176

Water Depth:

- 4,922 ft Slope: 3.4° SE

Nearest Shoreline 53.99 Miles @ 298° 8’ 08.86’’

Port of Operation Fourchon 116.06 Miles @ 284° 5’ 34.73’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.21 Miles @ 66° 39’ 22.34’’



### Nearest potential se nsitive sessile benthic community to the proposed location is a localized fluid
expulsion site approximatel y 12,7 00ft southeast of the proposed well location.

**Conclusions and Recommendations:** The proposed MC253

- B wellsite will not impact any sites

favora ble for development of sensitive sessile benthic communities.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician

# ±

®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 Proposed MC253-A Proposed MC253-B Proposed MC208-C

-4900 -4800

-5000

-5100 -4700 -4600 -4500

-5200 -4400

-4300 -4200

-5300 -4100

-4800

-4900 -4800 -4900 -4300

Proposed MC208-D Proposed MC208-E

MC252-188°19'0"W88°20'0"W88°21'0"W88°22'0"W88°23'0"W88°24'0"W

28°46'0"N

28°45'0"N

28°44'0"N

28°43'0"N

28°42'0"N1,190,0001,200,0001,210,0001,220,000 10,420,000 10,430,000 10,440,000

0 4,000 8,000 2,000 Feet

0 1,000 2,000 500 Meters 

### Chart scale 1" = 4,000' 

# Biological, Physical & Socio-Economic Proposed MC208-C Well Location (1,202,630ft E / 10,439,071ft N) ®33 3

3 Depth in feet below sea surface to seabed,

contoured at 100ft intervals -4,900

Proposed MC208-D Well Location (1,200,850ft E / 10,439,116ft N)

Proposed MC208-E Well Location (1,203,299ft E, 10,446,834ft N) ®33 3

3

®33 3

3 

### MISSISSIPPI CANYON BLOCK 253 (OCS-G24062)

Proposed MC253-A Well Location (1,204,584ft E / 10,431,637ft N)

Proposed MC253-B Well Location (1,204,436ft E / 10,434,800ft N) ®33 3

3

®33 3

3 Seabed fault intersection tick denotes

downthrown side

Fluid expulsion sites favorable for possible sensitive sessile benthic community development 1 2

, 0 0 0 f t R a d i u s 1

, 0 0 0 f t B u f f e r Z o n e 2 , 0 0

0 f t R a d i u

s

1 , 0 0 0 f t B

u f f e r Z

o n e

1 2 , 0 0 0 f t R

a d i u s 2

, 0 0

0 f t R a d i u

sLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

97 

### Sensitive Sessile B enthic Community Statement

– MC208

- C



## LLOG Exploration Company

July 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

Reference: Sensitive sessile benthic Community Summary Mississippi Canyon, Block 208

OCS

- (G 32303)

Ladi es/Gentlemen: Gardline Surveys Inc was contracted by LLOG Exploration Company to prepare a Site Clearance
Letter for the proposed MC208

- C location in Mississippi Canyon, Block 208 (OCS

- G 32303 ). This letter
addresses location proximity to potential sensit ive sessile benthic community sites. LLOG Exploration Company indicates that this well will be drilled with a semi

- submersible rig with anchors

.

This sensitive sessile benthic community summary letter is issued as a supplement to Gardline Report s

No. 802 5 entitled 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and
253, Volume 1, May 2009 and Volume 2, MC208

- C

, D and E W ell Clearance Letters, July 2011 . A Biological, Physical and Socio

- economic Map and Plat is included at the en d of this appendix illustrating
the areas of potential seabed impact.

**Potential Sensitive Sessile B**  **enthic Communities.** 
Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within 2,0 00 feet of any propo sed mud and cuttings discharge location.

Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within the 12,000 feet maximum anchor radius.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

98 

### Proposed MC208

- C Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 45' 31.07” North Easting 1,202,630 US ft E

Longitude 88° 22’ 0.25” West Northing 10,439,071 US ft N

FEL of Mississippi Canyon 208 1

, 210 US ft Inline 17360

FSL of Mississippi Canyon 208 511 US ft Crossline 14281

Water Depth:

- 4,750 ft Slope: 2.2° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.23 Miles @ 69° 8’ 40.69’’



### Neares t potential sensitive sessile benthic community to the proposed location is a localized fluid
expulsion site approximately 1 7

, 0 00ft southeast of the proposed well location.

**Conclusions and Recommendations:** The proposed MC208

- C wellsite will not impact an y sites

favorable for development of sensitive sessile benthic communities.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician

# ±

®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 Proposed MC253-A Proposed MC253-B Proposed MC208-C -4400 -4300

-4500 -4600

-4700

-4800

-4900 -4200 -4100

-5000 -4000 -3900 -3800 -3700 -3600

-5100 -3500 -3400

-5200 -3300 -3200

-4900 -4300

-4900 -4100

-4800 -4100

-4100

Proposed MC208-D Proposed MC208-E

MC252-1 -3100

-480088°19'0"W88°20'0"W88°21'0"W88°22'0"W88°23'0"W88°24'0"W88°25'0"W

28°49'0"N

28°48'0"N

28°47'0"N

28°46'0"N

28°45'0"N

28°44'0"N

28°43'0"N1,190,0001,200,0001,210,0001,220,000 10,430,000 10,440,000 10,450,000 10,460,000

0 5,000 10,000 2,500 Feet

0 1,000 2,000 500 Meters 

### Chart scale 1" = 5,000' 

# Biological, Physical & Socio-Economic Proposed MC208-C Well Location (1,202,630ft E / 10,439,071ft N) ®33 3

3 Depth in feet below sea surface to seabed,

contoured at 100ft intervals -4,600

Proposed MC208-D Well Location (1,200,850ft E / 10,439,116ft N)

Proposed MC208-E Well Location (1,203,299ft E, 10,446,834ft N) ®33 3

3

®33 3

3 

### MISSISSIPPI CANYON BLOCK 208 (OCS-G32303)

Proposed MC253-A Well Location (1,204,584ft E / 10,431,637ft N)

Proposed MC253-B Well Location (1,204,436ft E / 10,434,800ft N) ®33 3

3

®33 3

3 Seabed fault intersection tick denotes

downthrown side

Fluid expulsion sites favorable for possible sensitive sessile benthic community development 1 2

, 0 0 0 f t R a d i u s 2 , 0 0 0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e 2 , 0 0 0 f t R a d i u

s

1 , 0 0 0 f t B

u f f e r Z o n e 1

, 0 0 0 f t B u f f e r Z o n e

1 2

, 0 0 0 f t R

a d i u s 1 2

, 0 0 0 f t R a d i u s 2 , 0 0

0 f t R a d i u

sLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

100 

### Sensitive Sessile B enthic Community Statement

– MC208

- D



## LLOG Exploration Company

Ju ly 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

Reference: Sensitive Sessile B enthic Community Summary Mississippi Canyon, Block 208

OCS

- (G 32303)

Ladie s/Gentlemen: Gardline Surveys Inc was contracted by LLOG Exploration Company to prepare a Site Clearance
Letter for the proposed MC208

- D location in Mississippi Canyon, Block 208 (OCS

- G 32303 ). This letter
addresses location proximity to potential sensiti ve sessile benthic community sites. LLOG Exploration Company indicates that this well will be drilled with a semi

- submersible rig with anchors.

This sensitive sessile benthic community summary letter is issued as a supplement to Gardline Report s

No. 8025 entitled 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and
253, Volume 1, May 2009 and Volume 2, MC208

- C

, D and E Well Clearance Letters, July 2011

. A Biological, Physical and Socioeconomic Map and Plat is included at the end of this appendix illustrating
the areas of potential seabed impact.

**Potential Sensitive Sessile B**  **enthic Communities.** 
Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within 2,0 00 feet of any propose d mud and cuttings discharge location.

Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within the 12,000 feet maximum anchor radius.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

101 

### Proposed MC208

- D Location (Surface)

Location Coordinates

NAD 2 7 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 45' 31.31” North Easting 1,200,850 US ft E

Longitude 88° 22’ 20.26” West Northing 10,439,116 US ft N

FEL of Mississippi Canyon 208 2

, 990 US ft Inline 17342

FSL of Mississippi Canyon 208 556 US f t Crossline 14312

Water Depth:

- 4,707 ft Slope: 1.8° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 20.54 Miles @ 69° 30’ 5.93’’



### Nearest pot ential sensitive sessile benthic community to the proposed location is a localized fluid

e xpulsion site approximately 18,2 00ft southeast of the proposed well location.

**Conclusions and Recommendations:** The proposed MC208

- D wellsite will not impact any sit es
favorable for development of sensitive sessile benthic communities.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician

# ±

®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 Proposed MC253-A Proposed MC253-B Proposed MC208-C -4400 -4300

-4500 -4600

-4700

-4800

-4900 -4200 -4100

-5000 -4000 -3900 -3800 -3700 -3600

-5100 -3500 -3400

-5200 -3300 -3200

-4900 -4300

-4900 -4100

-4800 -4100

-4100

Proposed MC208-D Proposed MC208-E

MC252-1 -3100

-480088°19'0"W88°20'0"W88°21'0"W88°22'0"W88°23'0"W88°24'0"W88°25'0"W

28°49'0"N

28°48'0"N

28°47'0"N

28°46'0"N

28°45'0"N

28°44'0"N

28°43'0"N1,190,0001,200,0001,210,0001,220,000 10,430,000 10,440,000 10,450,000 10,460,000

0 5,000 10,000 2,500 Feet

0 1,000 2,000 500 Meters 

### Chart scale 1" = 5,000' 

# Biological, Physical & Socio-Economic Proposed MC208-C Well Location (1,202,630ft E / 10,439,071ft N) ®33 3

3 Depth in feet below sea surface to seabed,

contoured at 100ft intervals -4,600

Proposed MC208-D Well Location (1,200,850ft E / 10,439,116ft N)

Proposed MC208-E Well Location (1,203,299ft E, 10,446,834ft N) ®33 3

3

®33 3

3 

### MISSISSIPPI CANYON BLOCK 208 (OCS-G32303)

Proposed MC253-A Well Location (1,204,584ft E / 10,431,637ft N)

Proposed MC253-B Well Location (1,204,436ft E / 10,434,800ft N) ®33 3

3

®33 3

3 Seabed fault intersection tick denotes

downthrown side

Fluid expulsion sites favorable for possible sensitive sessile benthic community development 1 2

, 0 0 0 f t R a d i u s 2 , 0 0 0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e 2 , 0 0 0 f t R a d i u

s

1 , 0 0 0 f t B

u f f e r Z o n e 1

, 0 0 0 f t B u f f e r Z o n e

1 2

, 0 0 0 f t R

a d i u s 1 2

, 0 0 0 f t R a d i u s 2 , 0 0

0 f t R a d i u

sLLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

103 

### Sensitive Sessile B enthic Community Statement

– MC208

- E



## LLOG Exploration Company

Ju ly 1, 2011

US Department of the Interior Minerals Management Service

1201 Elmwood Park Blvd.
New Orleans, LA 70213

Reference: Sensitive Sessile B enthic Community Summary Mississippi Canyon, Block 208

OCS

- (G 32303)

Ladies/Gentl emen: Gardline Surveys Inc was contracted by LLOG Exploration Company to prepare a Site Clearance
Letter for the proposed MC208

- E location in Mississippi Canyon, Block 208 (OCS

- G 32303 ). This letter
addresses location proximity to potential sensitive sess ile benthic community sites. LLOG Exploration Company indicates that this well will be drilled with a semi

- submersible rig with anchors.

This sensitive sessile benthic community summary letter is issued as a supplement to Gardline Report

No. 8025 entitle d 3D Geohazard Assessment, Gulf of Mexico, Mississippi Canyon, Blocks MC208 and
253, Volume 1, May 2009 and Volume 2, MC208

- C

, D and E Well Clearance Letters, July 2011 . A Biological, Physical and Socioeconomic Map and Plat is included at the end of this appendix illustrating
the areas of potential seabed impact.

**Potential Sensitive Sessile B**  **enthic Communities.** 
Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within 2,0 00 feet of any proposed mud an d cuttings discharge location.

Features or areas that could support high

- density sensitive sessile benthic communities are **not** located
within the 12,000 feet maximum anchor radius.LLOG Exploration Company Gardline Report 8025

Well Clearance Letters

– Mississippi Canyon Blo cks 208 & 253

– Proposed MC208

- C

, D and E Well Locations Volume 2

104 

### Proposed MC208

- E Location (Surface)

Location Coordinates

NAD 27 Datum

- Clarke 1866 Ellipsoid UTM Zone 16N

Latitude 28° 46' 48.01” North Easting 1,203,299 US ft E

Longitude 88° 21’ 53.74” West Northing 10,446,834 US ft N

FEL of Mississippi Canyon 208 541 US ft Inline 17451

FNL of Mississippi Canyon 208 7,566 US ft Cross line 14403

Water Depth:

- 4,645 ft Slope: 3.8° SE

Nearest Shoreline 49.95 Miles @ 296° 43’ 25.6’’

Port of Operation Fourchon 112.44 Miles @ 282° 58’ 56.9’’

Nearest Manned Platform MC127 A

- Horn Mountain 19.63 Miles @ 73° 1’ 33.83’’



### Nearest potential sensitive sessile benthic community to the proposed location is a localized fluid
expulsion site approximately 22

, 9 00ft southeast of the proposed well location.

**Conclusions and Recommendations:** The proposed MC208

- E wellsite will not impact any sites

favo rable for development of sensitive sessile benthic communities.

Sincerely, LLOG Exploration Company

Jaime Mata Geological Technician

# ±

®33 3

3

®33 3

3 ®33 3

3

®33 3

3

®33 3

3



# 6 Proposed MC253-A Proposed MC253-B Proposed MC208-C -4400 -4300

-4500 -4600

-4700

-4800

-4900 -4200 -4100

-5000 -4000 -3900 -3800 -3700 -3600

-5100 -3500 -3400

-5200 -3300 -3200

-4900 -4300

-4900 -4100

-4800 -4100

-4100

Proposed MC208-D Proposed MC208-E

MC252-1 -3100

-480088°19'0"W88°20'0"W88°21'0"W88°22'0"W88°23'0"W88°24'0"W88°25'0"W

28°49'0"N

28°48'0"N

28°47'0"N

28°46'0"N

28°45'0"N

28°44'0"N

28°43'0"N1,190,0001,200,0001,210,0001,220,000 10,430,000 10,440,000 10,450,000 10,460,000

0 5,000 10,000 2,500 Feet

0 1,000 2,000 500 Meters 

### Chart scale 1" = 5,000' 

# Biological, Physical & Socio-Economic Proposed MC208-C Well Location (1,202,630ft E / 10,439,071ft N) ®33 3

3 Depth in feet below sea surface to seabed,

contoured at 100ft intervals -4,600

Proposed MC208-D Well Location (1,200,850ft E / 10,439,116ft N)

Proposed MC208-E Well Location (1,203,299ft E, 10,446,834ft N) ®33 3

3

®33 3

3 

### MISSISSIPPI CANYON BLOCK 208 (OCS-G32303)

Proposed MC253-A Well Location (1,204,584ft E / 10,431,637ft N)

Proposed MC253-B Well Location (1,204,436ft E / 10,434,800ft N) ®33 3

3

®33 3

3 Seabed fault intersection tick denotes

downthrown side

Fluid expulsion sites favorable for possible sensitive sessile benthic community development 1 2

, 0 0 0 f t R a d i u s 2 , 0 0 0 f t R a d i u

s

1

, 0 0 0 f t B u f f e r Z o n e 2 , 0 0 0 f t R a d i u

s

1 , 0 0 0 f t B

u f f e r Z o n e 1

, 0 0 0 f t B u f f e r Z o n e

1 2

, 0 0 0 f t R

a d i u s 1 2

, 0 0 0 f t R a d i u s 2 , 0 0

0 f t R a d i u

sMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 11 

# APPENDIX F
WASTE AND DISCHA RGE INFORMATION (30 CFR PART 250.217 AND 250.248)

A. Projected Generated Wastes

See the following tables:

TABLE 1. Wastes you will generate, treat and downhole dispose or discharge to the GOM

TABLE 2. Wastes you will transport and /or dispose of onshore



# B. Modeling

Not applicable. Proposed activities will be covered by U.S. EPA NPDES
General Permit.please specify if the amount reported is a total or per well amountMC208&253Projected generated wastePProjected ocean dischargesType of Waste Composition Projected AmountTDischarge rate Discharge Method Answer yes or noWill drilling occur ? If yes, fill in the muds and cuttings.EXAMPLE: Cuttings wetted with synthetic basedfluidCuttings generated while usingsynthetic based drilling fluid. X bbl/well X bbl/day/well discharge overboard NoWater-based drilling fluidWater based mud additives,barite and gel used for WBM63,745 bbls/well8,527 bbls/day/well Discharge overboard NoCuttings wetted with water-based fluidCuttings generated while usingwater based drilling fluid. 3,615 bbls/well484 bbls/day/wellDischarge overboard NoCuttings wetted with synthetic-based fluidCuttings generated while usingsynthetic based drilling fluid. 3,672 bbls/well 117 bbls/day/well Discharge overboard NoWill humans be there? If yes, expect conventional wasteEXAMPLE: Sanitary waste waterSanitary waste from livingquarters X bbl/well X bbl/hr/wellchlorinate and dischargeoverboard NoDomestic wasteMisc waste for living quarters 29,304 bbls/well2.7 bbls/hr/wellDischarge overboard (no freeoil)NoSanitary wasteProcessed sanitary waste fromliving quarters 19,536 bbls/well1.8 bbls/hr/wellChlorinate and dischargeoverboard NoIs there a deck? If yes, there will be Deck DrainageDeck DrainageAccumulated drainage due torainfall 0 to 47,261 bbls/well 0 to 167 bbls/hr/wellTest for oil and grease anddischarge overboardNoWill you conduct well treatment, completion, or workover?Well treatment fluidsNPDES approved treatmentfluid used for well operations 100 bbls/well20 bbls/hr/wellTest for oil and grease anddischarge overboard.NoWell completion fluidsClear brines used for completionoperations 500 bbls/well100 bbls/hr/wellTest for oil and grease anddischarge overboard. Thisexcludes clear brinescontaining ZincNoWorkover fluidsN/AN/ANA NANoTABLE 1. WASTES YOU WILL GENERATE, TREAT AND DOWNHOLE DISPOSE OR DISCHARGETO THE GOMProjectedDownholeplease specify if the amount reported is a total or per well amountMC208&253Projected generated wastePProjected ocean dischargesType of Waste Composition Projected AmountTDischarge rate Discharge Method Answer yes or noTABLE 1. WASTES YOU WILL GENERATE, TREAT AND DOWNHOLE DISPOSE OR DISCHARGETO THE GOMProjectedDownholeMiscellaneous discharges. If yes, only fill in those associated with your activity.Desalinization unit dischargeUncontaminated spent seawateused for potable watergeneration unit 0 to 5,000 bbls/well700 bbls/hr/well Discharge overboardNoBlowout prevent fluidTreated freshwater used controlof subsea blowout preventers 0 to 100 bbls/well30 bbls/hr/wellDischarge at seafloor whenBOP's installedNoBallast waterUncontaminated seawater usedfor ballast control 0 to 100,000 bbls/well16,350 bbls/hr/well Discharge overboardNoBilge waterUncontaminated freshwater andseawater overflow / leakageaccumuated from machineryoperations 0 to 5000 bbls/well1635 bbls/hr/well Discharge overboardNoExcess cement at seafloorExcess cement slurry andmixwater used for cementingoperation - NPDES allowed 300 bbls/well360 bbls/hr/well Discharge at mudlineNoFire waterUncontaminated seawater usedfor fire control system 0 to 10,000 bbls/well16,350 bbls/hr/well Discharge overboardNoCooling waterUncontaminated seawater usedfor heat exchanger operationsused to cool machinery 3,367,000 bbls/well1542 bbls/hr/well Discharge overboardNoWill you produce hydrocarbons? If yes fill in for produced water.Produced waterNA NANA NA NoWill you be covered by an individual or general NPDES permit ?GeneralOGMG290000comply with the requirements of the NPDES permit.NOTE: If you will not have a type of waste, enter NA in the rowPlease specify whatever the amount reported is a total or per wellMC 208 & 253Projectedgenerated wasteSolidandLiquidWastsesTransportationType of Waste Composition Transport MethodName/Location of FacilityAmountDisposal MethodNewport EnvironmentalServices Inc., Ingleside, TX X bbl/well RecycledOil-based drilling fluid or mudN/A NA N/A NA NASynthetic-based drilling fluid or mudInternal olifin, ester nbasedmudBarged in 25 bbls cutting boxesand / or liquid mud tanks forsupply vesselsNewpark Transfer Station,Fourchon, LA 6750 bbls / well RecycledCuttings wetted with Water-based fluidN/A NA N/A NA NACuttings wetted with Synthetic-based fluidN/A NA N/A NA NACuttings wetted with oil-based fluidsN/A NA N/A NA NAWill you produce hydrocarbons? If yes fill in for produced sand.Produced sandN/A N/A N/A N/A N/AEXAMPLE: trash and debris (recylables) Plastic, paper, aluminum barged in a storage bin ARC, New Iberia, LA X lb/well RecycledTrash and debrisPlastic, paper, aluminum Barged in a storage binBlanchard Landfill, GoldenMeadows, LA 4000 lbs / well Recyle and LandfillUsed oilSpent oil from machineryBarged in USCG approvedtransfer tote tanks. L&L Services, Fourchon, LA 200 bbls / well RecycledWash waterWash water w/ SBMresidue and surfactantsBarged in 25 bbls cutting boxesand / or liquid mud tanks forsupply vesselsNewpark Transfer Station,Fourchon, LA 2000 bbls / wellApproved disposal wellinjection or land farmChemical product wastesSpent treatment and / ordamaged chemicals used inoperationsBarged in 25 bbls cutting boxesand / or cutting boxes L&L Services, Fourchon, LA 10 bbls / well RecycledNOTE: If you will not have a type of waste, enter NA in the row.TABLE 2. WASTES YOU WILL TRANSPORT AND /OR DISPOSE OF ONSHOREWill you have additional wastes that are not permitted for discharge? IfWaste DisposalMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 12 

# APPENDIX G
AIR EMISSIONS INFORMATION (30 CFR PART 250.218AND 250.249)

A. Emissions Worksheets and Screening Questions

The Projected Quality Emissions Re port (Form MMS-138) addresses the proposed drilling, completion and potenti al testing operations utilizing a typical semi-submersible drilling unit, with related support vessels and construction barge information.

As evidenced by Attachment J, the worksheets were completed based on the proposed flaring and burning operations.

Screening Questions for EP’s Yes No
Is any calculated Complete Total (CT) Emission amount (in tons associated with your proposed exploration activities mo re 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

Does your emission calculations include any emission reduction measures or
modified emission factors? 

### X

Are your proposed exploration activities loca ted east of 87.5 degrees W longitude? 

### X Do you expect to encounter H2S 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



# B. Emissions Reduction Measures

The projected air emissions are within the exemption level; therefore, no emission reduction measures are being proposed.



# C. Verification of Nondefault Emissions Factors

LLOG has elected to use the default emission factors as provided in Attachment J.



# D. Non-Exempt Activities

The proposed activities are within the exemption amount as provided in Attachment

J.



# E. Modeling Report

This section of the Plan is not a pplicable to the proposed operations.EXPLORATION PLAN (EP)AIR QUALITY SCREENING CHECKLISTOMB Control No. 1010-0151OMB Approval Expires: 12/31/2011COMPANYLLOG Exploration Offshore, L.L.C.AREAMississippi CanyonBLOCK208 & 253LEASEOCS-G 32303 & 24062PLATFORMWELLA- ECOMPANY CONTACTKathy GowlandTELEPHONE NO.985-801-4300REMARKSDrill, complete and test 5 wells.MMSFORM MMS-138(December 2008 - Supersedes all previous versions of form MMS-138 which may not be used).Page 1 of 8EMISSIONS CALCULATIONS 1ST YEARCOMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKSLLOG Exploration Offsho Mississippi Canyon 208 & 253 OCS-G 32303&A - E Kathy Gowland 985-801-4300OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONSDiesel Engines HP GAL/HR GAL/DNat. Gas Engines HP SCF/HR SCF/DBurners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CODRILLING PRIME MOVER>600hp diesel 26400 1275.12 30602.88 24 63 18.61 85.36 639.65 19.19 139.56 14.07 64.54 483.57 14.51 105.51PRIME 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 0.00PRIME 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 0.00PRIME 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 0.00BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00AUXILIARY 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 0.00VESSELS>600hp diesel(crew) 2100 101.43 2434.32 8 9 1.48 6.79 50.88 1.53 11.10 0.05 0.24 1.83 0.05 0.40VESSELS>600hp diesel(supply) 2100 101.43 2434.32 10 27 1.48 6.79 50.88 1.53 11.10 0.20 0.92 6.87 0.21 1.50VESSELS>600hp diesel(tugs) 4200 202.86 4868.64 12 4 2.96 13.58 101.76 3.05 22.20 0.07 0.33 2.44 0.07 0.53FACILITY 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 0.00INSTALLATION 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 0.00VESSELS>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 0.00VESSELS>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 0.00MISC. BPD SCF/HR COUNTTANK- 0 0 0 0.00 0.00DRILLING OIL BURN 250 24 2 4.38 71.15 20.83 0.10 2.19 0.11 1.71 0.50 0.00 0.05WELL TEST GAS FLARE 208333.33 24 2 0.12 14.87 12.56 80.94 0.00 0.36 0.30 1.942011 YEAR TOTAL28.90 183.79 878.88 37.96 267.09 14.50 67.73 495.57 15.14 109.93EXEMPTIONCALCULATIONDISTANCE FROM LAND INMILES1798.20 1798.20 1798.20 1798.20 48574.4754.0MMSFORM MMS-138(December 2008 - Supersedes all previous versions of form MMS-138 which may not be used).Page 3 of 8EMISSIONS CALCULATIONS 2ND YEARCOMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKSLLOG Exploration OffshoMississippi Canyon 208 & 253 OCS-G 32303&A - E Kathy Gowland 985-801-4300OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONSDiesel Engines HP GAL/HR GAL/DNat. Gas Engines HP SCF/HR SCF/DBurners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CODRILLING PRIME MOVER>600hp diesel 26400 1275.12 30602.88 24.00 91.00 18.61 85.36 639.65 19.19 139.56 20.32 93.22 698.50 20.95 152.40PRIME MOVER>600hp diesel 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00PRIME MOVER>600hp diesel 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00PRIME MOVER>600hp diesel 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00AUXILIARY EQUIP<600hp diesel 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00VESSELS>600hp diesel(crew) 2100 101.43 2434.32 8.00 14.00 1.48 6.79 50.88 1.53 11.10 0.08 0.38 2.85 0.09 0.62VESSELS>600hp diesel(supply) 2100 101.43 2434.32 10.00 40.00 1.48 6.79 50.88 1.53 11.10 0.30 1.36 10.18 0.31 2.22VESSELS>600hp diesel(tugs) 4200 202.86 4868.64 12.00 6.00 2.96 13.58 101.76 3.05 22.20 0.11 0.49 3.66 0.11 0.80FACILITY 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 0.00INSTALLATION 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 0.00VESSELS>600hp diesel(crew) 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00VESSELS>600hp diesel(supply) 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00MISC. BPD SCF/HR COUNTTANK- 0 0 0 0.00 0.00DRILLING OIL BURN 250 24 4 4.38 71.15 20.83 0.10 2.19 0.21 3.42 1.00 0.00 0.11WELL TEST GAS FLARE 208333.33 24 4 0.12 14.87 12.56 80.94 0.01 0.71 0.60 3.882012 YEAR TOTAL28.90 183.79 878.88 37.96 267.09 21.02 98.87 716.90 22.06 160.03EXEMPTIONCALCULATIONDISTANCE FROM LAND INMILES1798.20 1798.20 1798.20 1798.20 48574.4754.0MMSFORM MMS-138(December 2008 - Supersedes all previous versions of form MMS-138 which may not be used).Page 4 of 8EMISSIONS CALCULATIONS 3RD YEARCOMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKSLLOG Exploration OffshoMississippi Canyon 208 & 253 OCS-G 32303&A - E Kathy Gowland 985-801-4300OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONSDiesel Engines HP GAL/HR GAL/DNat. Gas Engines HP SCF/HR SCF/DBurners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CODRILLING PRIME MOVER>600hp diesel 26400 1275.12 30602.88 24 141 18.61 85.36 639.65 19.19 139.56 31.48 144.44 1082.28 32.47 236.13PRIME 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 0.00PRIME 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 0.00PRIME 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 0.00BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00AUXILIARY 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 0.00VESSELS>600hp diesel(crew) 2100 101.43 2434.32 8 21 1.48 6.79 50.88 1.53 11.10 0.12 0.57 4.27 0.13 0.93VESSELS>600hp diesel(supply) 2100 101.43 2434.32 10 61 1.48 6.79 50.88 1.53 11.10 0.45 2.07 15.52 0.47 3.39VESSELS>600hp diesel(tugs) 4200 202.86 4868.64 12 9 2.96 13.58 101.76 3.05 22.20 0.16 0.73 5.50 0.16 1.20FACILITY 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 0.00INSTALLATION 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 0.00VESSELS>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 0.00VESSELS>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 0.00MISC. BPD SCF/HR COUNTTANK- 0 0 0 0.00 0.00DRILLING OIL BURN 250 24 6 4.38 71.15 20.83 0.10 2.19 0.32 5.12 1.50 0.01 0.16WELL TEST GAS FLARE 208333.33 24 6 0.12 14.87 12.56 80.94 0.01 1.07 0.90 5.832013 YEAR TOTAL28.90 183.79 878.88 37.96 267.09 32.54 152.94 1110.14 34.14 247.64EXEMPTIONCALCULATIONDISTANCE FROM LAND INMILES1798.20 1798.20 1798.20 1798.20 48574.4754.0MMSFORM MMS-138(December 2008 - Supersedes all previous versions of form MMS-138 which may not be used).Page 5 of 8EMISSIONS CALCULATIONS 4TH YEARCOMPANY AREA BLOCK LEASE PLATFORM WELL CONTACT PHONE REMARKSLLOG Exploration OffshorMississippi Canyon 208 & 253 OCS-G 32303&A - E Kathy Gowland 985-801-4300OPERATIONS EQUIPMENT RATING MAX. FUEL ACT. FUEL RUN TIME MAXIMUM POUNDS PER HOUR ESTIMATED TONSDiesel Engines HP GAL/HR GAL/DNat. Gas Engines HP SCF/HR SCF/DBurners MMBTU/HR SCF/HR SCF/D HR/D DAYS PM SOx NOx VOC CO PM SOx NOx VOC CODRILLING PRIME MOVER>600hp diesel 26400 1275.12 30602.88 25 196 18.61 85.36 639.65 19.19 139.56 45.59 209.14 1567.14 47.01 341.92PRIME 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 0.00PRIME 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 0.00PRIME 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 0.00BURNER diesel 0 0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00AUXILIARY 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 0.00VESSELS>600hp diesel(crew) 2100 101.43 2434.32 8 29 1.48 6.79 50.88 1.53 11.10 0.17 0.79 5.90 0.18 1.29VESSELS>600hp diesel(supply) 2100 101.43 2434.32 10 85 1.48 6.79 50.88 1.53 11.10 0.63 2.89 21.62 0.65 4.72VESSELS>600hp diesel(tugs) 4200 202.86 4868.64 12 13 2.96 13.58 101.76 3.05 22.20 0.23 1.06 7.94 0.24 1.73FACILITY 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 0.00INSTALLATION 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 0.00VESSELS>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 0.00VESSELS>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 0.00MISC. BPD SCF/HR COUNTTANK- 0 0 0 0.00 0.00DRILLING OIL BURN 250 24 7 4.38 71.15 20.83 0.10 2.19 0.37 5.98 1.75 0.01 0.18WELL TEST GAS FLARE 208333.33 24 7 0.12 14.87 12.56 80.94 0.01 1.25 1.06 6.802014 YEAR TOTAL28.90 183.79 878.88 37.96 267.09 46.99 219.86 1605.60 49.14 356.64EXEMPTIONCALCULATIONDISTANCE FROM LAND INMILES1798.20 1798.20 1798.20 1798.20 48574.4754.0MMSFORM MMS-138(December 2008 - Supersedes all previous versions of form MMS-138 which may not be used).Page 6 of 8SUMMARYCOMPANY AREA BLOCK LEASE PLATFORM WELLLLOG ExploratioMississippi Canyon 208 & 253 OCS-G 32303 & 24062A - EEmitted SubstanceYearPM SOx NOx VOC CO2011 14.50 67.73 495.57 15.14 109.932012 21.02 98.87 716.90 22.06 160.032013 32.54 152.94 1110.14 34.14 247.642014 46.99 219.86 1605.60 49.14 356.64Allowable1798.20 1798.20 1798.20 1798.20 48574.47MMSFORM MMS-138(December 2008 - Supersedes all previous versions of form MMS-138 which may not be used).Page 8 of 8Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 13 

# APPENDIX H
OIL SPILL INFORMATION (30 CFR PART 250.219 AND 250.250)

A. 

# Oil Spill Response Planning

All the proposed activities in this Revised Exploration Plan will be covered by the Oil Spill Response Plan filed by LLOG (MMS Operator No. 02058) in accordance with 30 CFR 254 and approved on June 3, 2009, last modification May 31, 2011 (not currently approved). LLOG submitted the Biennial Oil Spill Response Plan on 06/30/2010 (currently pendi ng approval). OSRP Certification submitted by letter dated June 1, 2011 fo r modification dated May 31, 2011. The WCD proposed in this Plan does not exceed the WCD submitted in the
modification dated 05/31/2011. The last OSRP Certification was accepted by
BOEMRE on 03/25/2011.

B. 

# Spill Response Sites

The following locations will be used in the event an oil spill occurs as a result of the proposed activities.

Primary Response Equipment
Location Pre-Planned Staging Location(s)

Houma, LA Fort Jackson, LA

C. 

# OSRO Information

The O’Brien Group (TOG) will provide tr ained personnel capable of providing supervisory management of the oil spill response in addition to contacting and deploying cleanup personnel and equipment

LLOG utilizes Clean Gulf Associates (CGA) as it’s primary provider for equipment, which is an i ndustry cooperative owning an inventory of oil spill clean-up equipment. CGA is suppor ted by the Marine Spill Response Corporation’s (MSRC), which is responsib le for storing, inspecting, maintaining and dispatching CGA’s equipment. Th e MSRC STARS network provides for the closest available personnel, as well as an MSRC supervisor to operate the equipment.Mississippi Canyon Block 253 (OCS-G 24062) 7/13/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 14 

## D. 

# Worst-Case Scenario Information

Category Regional OSRP Revised EP Type of Activity Exploratory MODU Exploratory MODU Facility Surface Location Mississippi Canyon Block 547 Mississippi Canyon Blocks 253

& 208 Facility Description Well Location Well No. SS002 (Location B) Well No. 001 (Location B)

Distance to Nearest Shoreline (Miles) 38.4 miles 54 miles

Volume: Storage Tanks (total) Facility Piping (total) Lease Term Pipeline Uncontrolled Blowout (day) Barging
Potential 24 Hour Volume (bbls)
Total Volume 225,144 bbls 22,289,256 190,525 bbls 21,719,850 Type of Liquid Hydrocarbon Crude Oil Crude Oil API Gravity 28o 38.2o 

## Since LLOG Exploration Offshore, L.L.C. (LLOG) has the capability to respond to the appropriate worst-case spill scenario included in its regional OSRP approved on June 3, 2009, last modified May 31, 2011 (not currently approved),
and since the worst-case scenario dete rmined for this EP does not replace the
worst-case scenario in our modified Regional OSRP (May 31, 2011), I hereby certify that LLOG 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 activitie s proposed in this EP.

LLOG submitted the Biennial Oil Spill Resp onse Plan on 06/30/2010 (currently pending approval). OSRP Certification s ubmitted by letter dated June 1, 2011 for modification dated May 31, 2011. The WCD proposed in this Plan does not
exceed the WCD submitted in the modifi cation dated 05/31/2011. The last OSRP Certification was accepted by BOEMRE on 03/25/2011.

LLOG Exploration Offshore, L.L.C., Company No. 02058, previously submitted the Regional OSRP Exploration WCD volum e to be reviewed in Plan R-5139, Revised Exploration Plan submitted on March 2, 2011.

The required proprietary data outlined in NTL 2010-N06 was submitted to
BOEMRE under cover letter dated June 13, 2011. LLOG accepts the BOEMRE’s worst case discharge value of 190,525 bbl s potential 24 hour volume with a 38.2o API Gravity.

E. 

# Oil Spill Response Discussion

See the following Oil Spill Response Discussion.

## SPILL RESPONSE DISCUSSION

For the purpose of NEPA and Coastal Zone Mana gement Act analysis, the largest spill volume originating from the proposed activity would be a well bl owout during drilling operations, estimated to be 190,525 barrels of crude oil with an API gravity of 38.2°.

Land Segment and Resource Identification

Trajectories of a spill and the probability of it impacting a land segment 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 BO EM website. The results are shown in Figure 1. The BOEM OSRAM identifies a 21% probability of impact to the shorelines of Plaquemines Parish, LA within 30 days. Plaquemines Parish includes Barataria Bay, the Mississippi River Delta, Breton Sound and the affiliated islands and bays. This region is an extremely sensitive habitat, and serves as a migratory, breeding, feed ing and nursery habitat for numerous species of
wildlife. Beaches in this area vary in grain pa rticle size, and can be clas sified as fine sand, shell or perched shell beaches. Sandy and muddy tidal flats are also abundant.

Response

LLOG Exploration Offshore, L.L.C. will make every effort to respond to the Worst Case Discharge as effectively as prac ticable. A description of the re sponse equipment available to
contain and recover the Worst Case Discharge is shown in Figure 2.

Using the estimated chemical 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 25% or 47,631 barrels of crude oil would be evaporated/dispersed with in 24 hours, with 142,894 barrels remaining.

Spill Response MC 253 Barrels of Oil

WCD Volume 190,525

Less 25% natural evaporation/dispersion 47,631

Remaining volume 142,894

Oil addressed by aerial dispersants 7,540

Oil addressed by in-situ burning 7,144



## Figure 2 outlines equipment, personnel, materials and support vessels as well as temporary storage equipment available to respond to a spill of 190,525 barrels. The list estimates individual 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 tw o of the DC-3 aircrafts and 4 sorties (8,000 gallons) from the Basler aircraft should disperse approximately 7,540 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, in -situ burning of oil may be attempted. Using estimates based on the Deepwater Horizon spill of 2010, up to 5% or 5,439 barrels of the Worst Case Discharge volume (remaining after natural weathering) could be bur ned. Slick containment boom would be immediately called out and on-s cene as soon as possible. Offshore 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, with a total derated skimming capacity of 318,609 barrels. Tempor ary storage associated with skimming equipment equals 31,700 barrels. If additional storage is needed, an 80,000 barrel storage barge, an 83,937 barrel storage 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 prior to any containment/skimming attempts.

If the spill went unabated, shoreline impact in Plaquemines Parish, Louisiana would depend upon existing environmental conditions. Shorelin e protection would include the use of CGA’s
near shore and shallow water skimmers with a totaled derated sk imming capacity of 54,753 barrels. Temporary storage asso ciated with skimming equipm ent equals 1,861 barrels. If additional storage is needed, an 86,948 barrel storage barge may be mobilized and centrally located to provide temporary storage allowing the sk immers to stay in the area of operations as much as possible. Onshore response may include the deployment of shoreline boom on beach areas, or protection and sorbent boom on vegetate d areas. MSAs with AMPOL and Oil Mop will ensure the availability of 147,000 feet of 18” shoreline boom. Figure 2 outlines individual times needed for procurement, load out, travel time to the site and deployment. Strategies would be based upon surveillance and real time trajectories that depict areas of potential impact given
actual sea and weather conditions. The State of Louisiana Initial Oil Spill Response Plan for Plaquemines Parish and Unified Command would be consulted to ensure that environmental and special economic resources would be correctly identified and prioritized to ensure optimal 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 spill from entering Louisiana’s coastal wetlands, based on the assumption that re moval of the released oil will be much easier and less damaging to fragile coastal ecosystem s if done in the open waters of the Gulf of Mexico. Supervisory pers onnel have the option to modify the deployment and operation of equipment allowing a more eff ective response to site-specific circumstances. LLOG Exploration Offshore, L.L. C.’s contract Spill Management Team holds a copy of the
State of Louisiana Initia l Oil Spill Response Plan.

## 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

LLOG Exploration Offshore, L.L.C. will take acti on to provide a safe, aggressive response to contain and recover as much of the spilled oil as quickly as it is safe to do so. In an effort to protect the environment, response actions will 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 re mote sensing systems, aerial photography
and visual confirmation

• Continual monitoring of vessel assets using vessel monitoring systems

## 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 time as skimming
systems

• Position as closely as possible to ski mming assets to minimize offloading time

## Vessels of Opportunity (VOO)

• Use LLOG Exploration Offshore, L.L.C.’s contracted resources as applicable

• Industry vessels are usually best for depl oyment 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 plan

## Near 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 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 movement by re mote 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 LLOG Exploration Offshore, L.L.C.’s contracted resources as applicable

• Industry vessel are usually best for depl oyment 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 patches

## 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 containe d in the appropriate Area Contingency Plan, and currently (Feb 2011) for Louisiana, The State of Louisiana Initial Oil Spill Response Plan, Deep Water Hori zon, 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 areas

## Decanting Strategy Recovered oil and water mixtures will typically se parate into distinct phases when left in a quiescent state. When separati on occurs, the relatively clean water phase can be siphoned or decanted back to the recovery point with minima l, if any, impact. Decan ting therefore increases the effective on-site oil storage capacity a nd equipment operating time. FOSC/SOSC approval will be requested 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 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 terminating operations. Skimming equipment listed below may have operational limits which exceed those 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 were exceeded. Systems below are some 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 seas

## Environmental Conditions in the GOM Louisiana is situated between the easterly and westerly wind belts, and therefore, experiences westerly winds during the wint er and easterly winds in the summer. Average wind speed is generally 14-15 mph along the coast. Wave 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 summer 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 November. 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 minor (Saffir-Simpson Scale categories 1 and 2) hurricane days, and 96% of the major (Saffir-Simpson categories 3, 4 and 5) hurricane days occurri ng then. Maximum activity is in early to mid September. Once in a few years there may be a hurri cane occurring "out of season" - primarily in May or December. 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 impac ting a land segment have been projected utilizing LLOG Exploration Offshore, L.L.C.’s WCD and informa tion 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

Mississippi Canyon 253

Loc B

54 miles from shore G24062 C57 Cameron Parish, LA Vermilion Parish, LA Terrebonne Parish, LA Lafourche Parish, LA Plaquemines Parish, LA

St. Bernard Parish, LA Hancock & Harrison County, MS Jackson County, MS Mobile County, AL Baldwin County, AL Escambia County, FL Okaloosa County, FL Walton County, FL

Bay County, FL 1

1

2

2

21

3

1

1

1

1

1

1

1

1WCD Scenario– BASED ON WELL BLOWOUT DURING DRILLING OPERATIONS(54 miles from shore)190,525 bbls of crude oilAPI Gravity 38.2°FIGURE 2 – Equipment Response Time to MC 253 Loc BDispersant/SurveillanceDispersantCapacity (gal)StorageCapacityPersonsReq.From Hrs to ProcureHrs toLoadoutTravel tositeTotal HrsCGABasler 67T 2000 NA 2 Houma 1 1 0.8 2.8ASIDC 3 1200 NA 2 Houma 1 1 1.0 3.0DC 3 1200 NA 2 Houma 1 1 1.0 3.0Aero Commander NA NA 2 Houma 1 1 0.8 2.8Offshore ResponseOffshore Equipment NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsCGAHOSS Barge 43000 4000 3 Tugs 8 Harvey 4 0 5 8.1 1 18.1T&T Marine (available through contract with CGA)Koseq Skimming Arms (3) 53487 6000 3 Utility 18 Leeville 4 12 1 9.2 2 28.2Koseq Skimming Arms (2) 35658 4000 2 Utility 12 Venice 4 12 1 5.4 2 24.4Koseq Skimming Arms (1) 17829 2000 1 Utility 6 Fourchon 4 12 1 9.2 2 28.2Koseq Skimming Arms (5) 89145 10000 5 Utility 30 Galveston 4 12 1 32.5 2 51.5Recovered 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 8.13 1 29.13DBL 76 1212984 NA 83937 1 Tug 6 Venice 4 12 4 8.13 1 29.13DBL 81 1132231 NA 86948 1 Tug 6 Venice 4 12 4 8.13 1 29.13DBL 101 1119760 NA 107285 1 Tug 6 Venice 4 12 4 8.13 1 29.13Staging Area: VeniceOffshore Equipment WithStagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toSiteHrs toDeployTotalHrsCGAFRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Belle Chasse 1 2 2 5.4 1 11.4FRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Galveston 1 2 8 5.4 1 17.4FRU (3) + 100 bbl Tank (5) 11310 500 1 Utility 6 Houma 1 2 3 5.4 1 12.4FRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Ingleside 1 2 11 5.4 1 20.4FRU (1) + 100 bbl Tank (2) 3770 200 1 Utility 6 Lake Charles 1 2 5.5 5.4 1 14.9FRU (2) + 100 bbl Tank (4) 7540 400 1 Utility 6 Venice 1 2 0 5.4 1 9.4Aqua Guard Triton RBS (2) 45560 4000 2 Utility 12 Galveston 4 12 8 5.4 2 31.4Offshore Equipment WithStagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toSiteHrs toDeployTotalHrsCGA42” Auto Boom (5000’) NA NA 10 Crew 20 Belle Chasse 1 2 2 5.4 1 11.442” Auto Boom (5000’) NA NA 10 Crew 20 Galveston 1 2 8 5.4 1 17.442” Auto Boom (5000’) NA NA 10 Crew 20 Houma 1 2 3 5.4 1 12.442” Auto Boom (2500’) NA NA 6 Crew 12 Ingleside 1 2 11 5.4 1 20.442” Auto Boom (5000’) NA NA 10 Crew 20 Lake Charles 1 2 5.5 5.4 1 14.942” Auto Boom (2500’) NA NA 6 Crew 12 Pascagoula 1 2 4 5.4 1 13.41000’ Hydro-Fire Boom(In-Situ Burn)NA NA 8 Utility 40 Harvey 1 4 2 5.4 6 18.4Nearshore ResponseNearshore Equipment NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsK-Sea Operating (available through contract with CGA)DBL 82 1137538 NA 86948 1 Tug 6 Venice 4 12 4 6.25 1 27.25CGA46’ FRV 5000 65 NA 4 Galveston 1 0 0 12.4 0 13.446’ FRV 5000 65 NA 4 Houma 1 0 2 2.8 0 5.846’ FRV 5000 65 NA 4 Lake Charles 1 0 1 9.2 0 11.246’ 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 10.8Staging Area: VeniceNearshore and InlandSkimmers With StagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotalHrsCGASWS Egmopol 3000 100 NA 3 Galveston 1 2 8 2 0 13SWS Egmopol 3000 100 NA 3 Houma 1 2 3 2 0 8SWS Marco 3588 34 NA 3 Houma 1 2 3 2 0 8SWS Marco 3588 20 NA 3 Lake Charles 1 2 5.5 2 0 10.5Rope Mop 77 2 0 3 Belle Chasse 1 2 2 2 0 7RO Storage Barge NA 249 Towed 0 Galveston 1 2 8 2 0 13RO Storage Barge NA 249 Towed 0 Houma 1 2 3 2 0 8RO Storage Barge NA 249 Towed 0 Lake Charles 1 2 5.5 2 0 10.5RO Storage Barge NA 249 Towed 0 Venice 1 2 0 2 0 5Shoreline ProtectionStaging Area: VeniceShoreline ProtectionBoomVOOPersonsReq.Storage/WarehouseLocationHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotal HrsAMPOL (available through MSA)42,000’ 18” Boom 16 Crew 40 New Iberia, LA 2 2 4 2 12 2220,000’ 18” Boom 8 Crew 20 New Orleans, LA 2 2 2 2 6 14Oil Mop (available through MSA)10,000’ 18” Boom 4 Crew 10 New Iberia, LA 1 1 4 2 3 1110,000’ 18” Boom 4 Crew 10 Houston, TX 1 1 7.5 2 3 14.510,000 18” Boom 4 Crew 10 Port Arthur, TX 1 1 6.25 2 3 13.2520,000 18” Boom 8 Crew 20 Belle Chasse, LA 1 1 1.75 2 6 11.7510,000 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 3.5 2 3 10.515,000 18” Boom 6 Crew 14 Gretna, LA 2 2 2 2 4 12Beach Boom EDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotalHrsCGABeach Boom (2000’) NA NA NA 6 Galveston 1 2 8 1 2 14Beach Boom (1000’) NA NA NA 4 Ingleside 1 2 11 1 2 17Beach 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 3 1 2 9Bird Scare Guns (24) NA NA NA 2 Belle Chasse 1 2 2 1 2 8Bird Scare Guns (12) NA NA NA 2 Galveston 1 2 8 1 2 14Bird Scare Guns (24) NA NA NA 2 Houma 1 2 3 1 2 9Bird Scare Guns (12) NA NA NA 2 Ingleside 1 2 11 1 2 17Bird Scare Guns (24) NA NA NA 2 Lake Charles 1 2 5.5 1 2 11.5Bird Scare Guns (24) NA NA NA 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 88,709Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 15 

# APPENDIX I
ENVIRONMENTAL MONITORING INFORMATION (30 CFR PART 250.221 AND 250.252)

A. Monitoring Systems

LLOG subscribes to Impact Weather Service which provides access to realtime weather conditions, and provi des periodic updates on impending
inclement weather conditions such as tropical depressions, storms and/or hurricanes entering the Gulf of Mexico.

LLOG also relies on the Nationa l Weather Service to support the
aforementioned subscribed service. During impending inclement weather conditions, LLOG closely coor dinates the activity wi th our contractors and field personnel to ensure the safety of people for evacuation; measures to prepare the facility for evacuation to en sure protection of the environment and the facility/equipment.

Mississippi Canyon Blocks 253 and 208 are in water depths greater than 400 meters (1,312’); therefore LLOG will follo w the guidelines of the applicable NTL 2009-G02 by monitoring and gather ing ocdan current data using Acoustic Doppler Current Profile (ADC P) while the MODU is on location.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# B. Incidental Takes

LLOG does not anticipate the incidental taking of any species as a result of the proposed activities based on the impl ementation of, and adherence to, the
NTL 2007-G03 “Marine Trash and De bris Awareness Training and
Elimination” and NTL 2007-G04 “Vessel Strike Avoidance and Injured/Dead Protected Species Reporting”.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# C. Flower Garden Banks National Marine Sanctuary

This section of the plan is not a pplicable to the proposed operations.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 16 

# APPENDIX J
LEASE STIPULATIONS/SPECIAL CONDITIONS INFORMATION (30 CFR PART 250.222 AND 250.253)

A. Lease Stipulations

Minerals Management Service (BOEMRE) did not invoke any stipulations for Leases OCS-G-24062 and OCS-G-32303, Mi ssissippi Canyon Blocks 253 and 208, respectively,

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# B. Special Conditions

• Subsea Completions

LLOG may potentially complete the proposed wells as subsea completions. Therefore, LLOG will follow the regulations in Title 30 CFR Parts 250.288 through 250.290, which mandates the submittal and approval of separate regulatory filings entitled a “Conservation Information Document” and a “Deepwate r Operations Plan ”, respectively.

• Breton Sound Area

Mississippi Canyon Blocks 208 and 253 are located within the 200 km
zone of the Breton National Wildlife Re fuge, and will consider the use of
best available control te chnology as required as Notic e to Lessees 98-10 if the projected air emissions are determ ined to significantly affect the air quality of an onshore area.

• Ocean Current Monitoring

The proposed operations under this Plan are in water depths greater than 400 meters (1,312’); therefore, LLOG w ill follow the guidelines of the applicable NTL 2009-G02 by conti nuously monitoring and gathering ocean current data using Acoustic D oppler Current Profile (ADCP) while
the MODU is on location.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 17 

# APPENDIX K
ENVIRONMENTAL MITIGATION MEASURES INFORMATION (30 CFR Part 250.23 and 250.54)

A. Measures Taken to Avoid, Minimize, and Mitigate Impacts

This section does not apply to th e operations as proposed herein.



# B. Incidental Takes

LLOG does not anticipate the incidental taki ng of any species as a result of the proposed activities based on the implemen tation of, and adherence to, the NTL 2007-G03 “Marine Trash and Debris Awareness Training and Elimination” and
NTL 2007-G04 “Vessel Strike Avoidance and Injured/Dead Protected Species Reporting”.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 18 

# APPENDIX L
RELATED FACILITIES AND OPERATIONS INFORMATION (30 CFR PART 250.256)

A. 

# Produced Liquid Hydrocar bon Transportation Vessels

Not applicable to proposed operations.

No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.Mississippi Canyon Block 253 (OCS-G 24062) 9/13/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 19 

# APPENDIX M
SUPPORT VESSELS AND AI RCRAFT INFORMATION (30 CFR PART 250.224 AND 250.257)

A. 

# General

Personnel involved in the proposed opera tions will typically use their own vehicles as transportation to and from the selected onshore base; whereas the selected vendors will transport the equipment by a combination of trucks, boats and/or helicopters to the onshore base. The personnel and equipment will then be transported to the drilling rig via the transportation methods and frequencies shown, taking the most direct route feas ible as mandated by weather and traffic
conditions:

Type Maximum Fuel Tank Storage Capacity Maximum No. in Area at Any Time Trip Frequency or
Duration

Tug Boats 3000 bbls 1 Every two weeks Supply Boats 500 bbls 1 Three times weekly Service Boats 500 bbls 1 Daily Crew Boats 500 bbls 1 Weekly

Aircraft 1900 lbs 1 As Needed



## No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# 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 180’ 1,500 bbls Weekly From shorebase in Fourchon, LA to MC
208/253



# C. Drilling Fluids Transportation

See Table 2 – Wastes you will Transport an d/or Dispose of Onshore, located in Appendix F of this Plan.



# D. Solid and Liquid Wastes Transportation

See Table 2 – Wastes you will Transport an d/or Dispose of Onshore, located in Appendix F of this Plan.Mississippi Canyon Block 253 (OCS-G 24062) 7/7/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 20 

# E. Vicinity Map

A Vicinity Plat showing the location of Mississippi Canyon Blocks 208 and 253
relative to the nearest shoreline and onshore base is included as Attachment K.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 21 

# APPENDIX N
ONSHORE SUPPORT FACILITIES INFORMATION (30 CFR PART 250.225 AND 250.258)

A. 

# General

The proposed surface disturbances in Mississippi Canyon Blocks 253 and 208 will be located approximately 54 miles from the nearest Louisiana shoreline, and approximately 116 miles from th e following onshore support base:

Name Location Existing/New/Modified Martin North Fourchon, LA Existing

LLOG will use an existing onshore base to accomplish the following routine operations:

● Loading/Offloading point for equipment supporting the offshore operations.

● Dispatching personnel and equipment, and does not anticipate the need for any expansion of the selected facili ties as a result of the activities proposed in this Revised Plan.

● Temporary storage for materials and equipment.

● 24 Hour Dispatcher

B. 

# Support Base Construction or Expansion

The proposed operations are temporary in nature and do not require any immediate action to acquire additional la nd or expand existing base facilities. No change – Refer to Initial EP for MC 253, OCS-G-24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.

C. 

# Support Base Construction or Expansion Timetable

This section of the plan is not a pplicable to the proposed operations. No change – Refer to Initial EP for MC 253, OC S-G-24062 Lease and MC 208, OCS-G32303, Control No. N-09406 approved on October 22, 2009.

D. 

# Waste Disposal

See Table 2 – Wastes you will Transport an d/or Dispose of Onshore, located in Appendix F of this Plan.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 22 

# APPENDIX O COASTAL ZONE MANAGEMENT ACT (CZMA) INFORMATION (30 CFR PART 250.226 AND 250.260)

A. Consistency Certification

. A certificate of Coastal Zone Manage ment Consistency for the States of Louisiana, Mississippi and Alabama are enclosed as Attachment L. No change – Refer to Attachment L ofthe Initial EP for MC 253, OCS-G24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.



# B. Other Information

Included as Attachment M are the enfo rceable policies from the States of Mississippi and Alabama that are related to OCS Plan Filings.

LLOG has considered all of Louisiana’s enforceable policies and certifies the consistency for the proposed operations.

No change – Refer to Attachment M of the Initial EP for MC 253, OCS-G24062 Lease and MC 208, OCS-G-32303, Control No. N-09406 approved on October 22, 2009.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 23 

# APPENDIX P
ENVIRONMENTAL IMPACT ANALYSIS (30 CFR PART 250.227 AND 250.261)

A. Impact Producing Factors (IPF’ s) From Proposed Activities

The following matrix is utilized to id entify the affected environments that could be impacted by these IPF’s. An “x” has been marked for each IPF category that Tana has determined may impact a particular environment as a result of the proposed ac tivities. For those cells which are footnoted, a statement is provided as to the appli cability of the propos ed activities, and where there may be an effect, an an alysis of the effect is provided.

Environmental Resources Impact Producing Factors (IPF’s)

Emissions (air, noise, light, etc) Effluents (muds, cuttings, other discharges

to the water

column or seafloor) Physical
disturbances
to the seafloor (rig, anchor,

structure emplacement, etc.) Wastes sent
to shore for

treatment or disposal Accidents (e.g., oil spills,
chemical spills, H2S 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) Chemosynthetic communities (4) Water quality X X

Fisheries X X X

Marine mammals X (8) X X (8)

Sea turtles X (8) X X (8) Air quality (9) Shipwreck sites (known or potential) (7)

Prehistoric archaeological sites (7)

Vicinity of Offshore Location

Essential fish habitat X (6) Marine and pelagic birds X Public health and safety (5)

Coastal and Onshore

Beaches (6)

Wetlands (6) Shorebirds and coastal nesting
birds (6)

Coastal wildlife refuge

Wilderness areasMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 24 

## Footnotes for Environmental Impact Analysis Matrix:

1. Activities that may affect a marine sanctuary or topographic feature. Specifically, if the well or platform site or any anchors will be on the seafloor within the: (a) 4-mile zone of the Flower Gardens Banks, or the 3-mile zone of Stetson Bank; (b) 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; (c) Essential Fish Habitat (EFH) criteria of 500 feet from any no-activity zone; or (d) Proximity of any submarine bank (500 ft buffer zone) with relief greater than 2 meters that is not protected by the Topographic S tipulation 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 seafloor habitats are protected by the Live Bottom (Low-Relief) Stipulation attached to an OCS lease.

4. Activities on blocks designated by the BOEMRE as being in water depths 300 meters or greater.

5. Exploration or production activities where H2S concentrations greater than 500 ppm might be
encountered.

6. All activities that could result in an accidental 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 th at no impact would occur, the EI A 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 BOEMRE as having high-probability for the occurrence of shipwrecks or prehistoric sites, including such blocks that will be affected that are adjacen t to the lease block in which your planned activity will occur. If the proposed activities are located a sufficient distance from a shipwreck or 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 transportation of pr oduced fluids to shore using shuttle tankers or barges.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 25 

# B. Impact Analysis

LLOG does not anticipate any unfore seen incidents from the proposed activities which could significantly impact the associated environment.
LLOG activities associated with this Exploration Plan (Plan) will be performed with prudent and industry accep ted standards, and in compliance with the federal agency regulations and oversight.

The “Oil Spills Information” Section of this Plan details the potential worse case discharge volume which has been calc ulated based on the new Bureau of Ocean Energy Management, Regulation and Enforcement (BOEMRE) Notice to Lessees (NTL 2010-N06). Respons e details associated with an unanticipated spill from this site are detailed in our Regional Oil Spill Response Plan (OSRP) which outlines the potential spill scenario, spill volumes, anticipated trajectory of the sp ill, response equipment available, and actions to be taken to respond to the potential spill incident. Additional measures implemented by LLOG is trajecto ry analyses to be obtained prior to and during the proposed activities, cont ractual arrangements with well control specialists and preliminary reviews of potential well intervention scenarios, and to supplement existing contracted response/clean-up equipment with equipment offered by Helix which specializes in subsea deepwater well intervention, containment and processing.



# Site Specific at Offshore Location

• Designated Topographic Features

There are no anticipated emissions, effl uents, physical disturbances to the seafloor, wastes transported to shore, and/or accidents from the proposed
activities that could cause im pacts to topographic features.

The proposed surface disturbances w ithin Mississippi Canyon Blocks 208 & 253 are located approximately 72 miles away from the closest designated topographic feature (Sackett Bank).

The crests of these designated topographic features in the northern Gulf are typically found below 10 m; therefore, concentrated oil from a surface spill is not likely to reach sessile biota. Subsurface spills could cause adverse impacts to a designated topographic feature; however, due to the offset distance this should not have an impact.

In the event of an unanticipated spill, LLOG would immediately implement its Regional Oil Spill Res ponse Plan and active source control and countermeasures to minimize these potential impacts.Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 26 

## • Pinnacle Trend Area Live Bottoms

There are no anticipated emissions, effl uents, physical disturbances to the seafloor, wastes sent to shore and/or accidents from the proposed activities that could cause impacts to a pinnacle trend area.

The proposed surface disturbances w ithin Mississippi Canyon Blocks 208 & 253 are located a significant distance (> 100 miles) from the closest pinnacle trend live bottom stipulated bl ock. The crests of these pinnacle trend areas are much deeper than 20 m.

During the surface location disturban ce review, LLOG reviews potential surface impacts, and would be able to identify any pinnacles within the vicinity and would avoid placement of any surface disturbances such as a drilling rig and associated anchors. These surface location disturbance areas would be avoided and/or mitigated during the review and approval process by the BOEM.

In the event of an unanticipated spill, LLOG would immediately implement its Regional Oil Spill Response Plan and activate source
control and countermeasures to mi nimize these potential impacts.

• Eastern Gulf Live Bottoms

There are no anticipated emissions, effluents, emissions physical disturbances to the seafloor, wastes se nt to shore, and/or accidents from the proposed activities that could cau se impacts to Eastern Gulf live
bottoms.

The proposed surface disturbances w ithin Mississippi Canyon Blocks 208 & 253 are located a significant distance (> 100 miles) from the closest Eastern Gulf live bottoms stipulated block. During the surface location disturbance review, LLOG previews pot ential surface impacts, and would be able to identify any live bottom ar eas within the vicinity and would avoid placement of any surface distur bances such as a drilling rig and
associated anchors.

In the event of an unanticipated spill, LLOG would immediately implement its Regional Oil Spill Response Plan and activate source
control and countermeasures to mi nimize these potential impacts.

• Chemosynthetic Communities

Water depths at the surface locations in Mississippi Canyon Blocks 208 & 253 range from 4,100 feet to 5,200 feet in cluding anchor radius. As notedMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 27 

## in the shallow hazards assessment (Att achment I in the Initial Exploration Plan) it is unlikely that the identified anomalies represent the presence of high-density chemosynthetic or other benthic communities.

• Water Quality

Bottom disturbances which may result based on placement of drilling rigs during an exploratory ph ase could increase water column turbidity and redistribution of any accumulated pollutants in the water column; which could cause temporary impacts on water quality conditions in the immediate vicinity.

Associated overboard effluents ar e regulated by th e EPA Region VI NPDES General Permit GMG290000 which mandates volume discharge rate limitations, certain testing requirem ents for toxicity and oil and grease limitations. As such, it is not anticipated these discharges authorized under the approved EPA NPDES permit will cause significant adverse impacts to water quality.

Certain wastes generated from the pr oposed activities will be manifested
and sent to shore for treatment and/or disposal at approved facilities. Other waste which may be considered hazardous will be collected and transported in sealed containers and transported to approve disposal sites in accordance with the RCRA regulations and guidelines.

An accidental oil spill release from the proposed activities, and cumulative similar discharge activity within the vicinity could potentially cause temporary impacts to water quality. In the event of such a release, the water quality would be temporarily affected by the dissolved components and small droplets. Currents and mi crobial degradation would remove the
oil from the water column or dilute the constituents to background levels.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Fisheries

Accidental oil spill releases from th e proposed activities, and cumulative similar discharge activity within the vicinity may potentially cause some
detrimental effects on fisheries. It is unlikely a sp ill would occur; however, such a release in open waters closed to mobile adult finfish or shellfish would likely be sub-lethal and the extent of damage would be reduced to the capability of adult fish and shellfish to avoid a spill, toMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 28 

## metabolize hydrocarbons, and to excr ete both metabolites and parent compounds.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Marine Mammals

GulfCet II studies reveal that cetaceans of the continental shelf and shelf edge are comprised of bottlenose dol phin and Atlantic spotted dolphin. Squid eaters, including dwarf and py gmy killer wale, Risso’s dolphin and
Cuvier’s beaked whale occur most frequently along the upper slope in
areas outside of anticyclones.

As a result of the proposed activities, marine ma mmals may be adversely impacted by emissions, effluents, wast e sent to shore and/or accidents.

Chronic and sporadic sub-lethal effect s would occur that may stress and/or weaken individuals of a local group or population and make them more susceptible to infection from natural or anthropogenic sources. Few lethal effects are expected from an accidental oil spill, chance collisions with service vessels and inges tion of plastic material.

The net results of any disturbance would depend on the size and percentage of the population affect ed, ecological im portance of the disturbed area, environmental and biol ogical parameters that influence an animal’s sensitivity to disturbance and stress, and the accommodation time in response to prolonged disturba nce (Geraci and St. Aubin, 1980). Collisions between cetaceans and ship could cause serious injury or death (Laist et al., 2001).

Sperm whales are one of 11 whale species that are hit commonly by ships (Laist et al., 2001). Collisions between OCS vessels and cetaceans within the project area are expected to be unusual events.

LLOG does not anticipate the incidental taking of any marine mammals as the result of the proposed activities. The proposed activities will be conducted by our company and its contra ctors under the additional criteria addressed by BOEMRE in Notice to Lessees (NTLs) 2007-G04 “Vessel Strike Avoidance and Injured/D ead Protective Species” and 2007-G03 “Marine Trash & Debris Awareness & Elimination”. The proposed operations will be conducted in accordance with the regulations via manifesting waste sent to shore and en suring such wastes are contained toMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 29 

## prevent loss. Informational placards will be maintained on the facility,
and LLOG and the associated contract ors obtain training on at least an annual basis to ensure personnel are aware of the reporting and operational requirements.

LLOG will conduct the proposed activities under EPA’s Region VI
NPDES General Permit GMG290000 which authorizes the discharge of certain effluents, subject to ce rtain limitations, prohibitions and recordkeeping requirements. As su ch, it is not anticipated these discharges authorized under the approved EPA NPDES permit will not cause significant adverse impacts to water quality.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Sea Turtles

Small numbers of turtles could be k illed or injured by chance collision with service vessels or by eating indi gestible trash, particularly plastic items accidentally lost from drilling rigs, production faci lities and service vessels. Drilling rigs an d project vessels produce noise that could disrupt normal behavior patterns and create some stress to sea turtles, making them more susceptible to disease. Accidental oil spill releases are potential threats which could have lethal effects on turtles. Contact and/or consumption of this released material could seriously aff ect individual sea turtles. Most OCS related impacts on sea turtles are expected to be sublethal. Chronic and/or avoidance of a ffected areas could cause declines in survival or productivity, resulti ng in gradual population declines.

LLOG will conduct the proposed activities under EPA’s Region VI
NPDES General Permit GMG290000 which authorizes the discharge of certain effluents, subject to ce rtain limitations, prohibitions and recordkeeping requirements. As su ch, it is not anticipated these discharges authorized under the approved EPA NPDES permit will not cause significant adverse impacts to water quality.

Additionally, LLOG and its contr actors will conduct the proposed activities under the additional criteria addressed by BOEMRE in Notice to Lessees (NTLs) 2007-G04 “Vessel Stri ke Avoidance and Injured/Dead Protective Species” and 2007-G03 “Mar ine Trash & Debris Awareness & Elimination”. The proposed operations will be conducted in accordance with the regulations via manifesting wa ste sent to shore and ensuring such wastes are contained to prevent loss. Informational placards will beMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 30 

## maintained on the facility, and LLOG and the associated contractors obtain training on at least an annual basis to ensure personnel are aware of the reporting and opera tional requirements.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Air Quality

The proposed activities are located a pproximately 48 miles to the nearest shoreline. LLOG has addressed the air quality issues associated with the proposed activities in the “Air Emissions Information” section of this Plan as a result of the proposed activities.

• Ship Wreck Sites (Known or Potential)

There are no physical disturbances to the seafloor which could impact known or potential shipwreck sites, as the review of high resolution
shallow hazards data indicate ther e are no known or potential shipwreck sites located within the survey area. As such, LLOG does not anticipate any IPF’s as a result of the proposed activities.

• Prehistoric Archaeological Sites

There are no physical disturbances to the seafloor which could cause impacts to prehistoric archaeological s ites, as the review of high resolution shallow hazards data and supporting studi es did not reflect the occurrence of prehistoric archaeological sites. As such LLOG does not anticipate any
IPF’s as a result of the proposed activities.

Vicinity of Offshore Location

• Essential Fish Habitat

As a result of the proposed activities, essential fish habitat may be adversely impacted by efflue nts and/or accidents.

An Accidental oil spill that may occur as a result of the proposed activities has potential to cause some detrimental effects on essential fish habitat. It is unlikely that an accidental oil sp ill release would occur; however, if a spill were to occur in close proximity to finfish or shellfish, the effectsMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 31 

## would likely be sub-lethal and the exte nt of damage would be reduced to the capability of adult fish and shellf ish to avoid a spill, to metabolize hydrocarbons and to excrete both me tabolites and parent compounds.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Marine and Pelagic Birds

As a result of the proposed activities, marine and pelagic birds may be adversely impacted by an accidental oil spill, by the birds coming into
contact with the released oil.

In the event of an unanticipated blowout resulting in an oil spill, it is likely to have an impact based on the indust ry wide standards for using proven equipment and technology for such responses. In that event, LLOG will implement the Regional Oil Spill Re sponse Plan and activate source
control and countermeasures to mi nimize these potential impacts.

• Public Health and Safety

There are no anticipated emissions, efflue nts, wastes sent to shore, and/or accidents from the proposed activities that could cause impacts to the public health safety. LLOG has reque sted BOEMRE approval to classify the proposed objective area as absent of hydrogen sulfide.

Coastal and Onshore

• Beaches

As a result of the proposed activities, beaches may be adversely impacted by an accidental oil spill. However, due to the distance from shore (approximately 48 miles), and the re sponse capabilities that would be implemented, no significant adverse impact s are expected. Both historical spill data and the combined trajectory /risk calculations referenced in the publication of OCS EIA/EA BOEMRE 2002-052 indicate there is little risk of contact or impact to the co astline and associated environmental

resources.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for suchMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 32 

## responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Wetlands

As a result of the proposed activities, wetlands may be adversely impacted by an accidental oil spill. However, due to the distance from shore (approximately 54 miles) and the re sponse capabilities that would be implemented, no significant adverse impact s are expected. Both historical spill data and the combined trajectory /risk calculations referenced in the publication of OCS EIA/EA BOEMRE 2002-052 indicate there is little risk of contact or impact to the co astline and associated environmental

resources.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Shore Birds and Coastal Nesting Birds

As a result of the proposed activities, shore birds and coastal nesting birds may be adversely impacted by an accidental oil spill. However, due to the distance from shore (approximately 54 m iles) and the response capabilities that would be implemented, no signif icant adverse impacts are expected. Both historical spill data and the combined trajectory/risk calculations referenced in the publication of OCS EIA/EA BOEMRE 2002-052
indicate there is little risk of c ontact or impact to the coastline and
associated environmental resources.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Coastal Wildlife Refuges

As a result of the proposed activities, coastal wildlife refuges may be adversely impacted by an accidental oil spill. However, due to the distance from shore (approximately 54 m iles) and the response capabilities that would be implemented, no signif icant adverse impacts are expected. Both historical spill data and the combined trajectory/risk calculations referenced in the publication of OCS EIA/EA BOEMRE 2002-052Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 33 

## indicate there is little risk of c ontact or impact to the coastline and
associated environmental resources.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

• Wilderness Area

As a result of the proposed activities, wilderness areas may be adversely impacted by an accidental oil spill. However, due to the distance from shore (approximately 54 miles) and th e response capabilities that would be implemented, no significant adverse impact s are expected. Both historical spill data and the combined trajectory /risk calculations referenced in the publication of OCS EIA/EA BOEMRE 2002-052 indicate there is little risk of contact or impact to the co astline and associated environmental

resources.

In the event of an unanticipated blowout, LLOG will implement industry wide standards for using proven equipment and technology for such responses. LLOG would immediately implement its Regional Oil Spill Response Plan and activate source control and countermeasures to minimize these potential impacts.

Other Resources Identified

LLOG has not identified any other envi ronmental resources other than those
addressed above.



# C. Impacts of Proposed Activities

LLOG does not anticipate any impacts on the offshore site specific locations, offshore vicinity, and/or coastal and onshore environmental conditions based on the potential impacts identified in the EIA worksheets and historical operations in the explora tion of this reservoir.



# D. Environmental Hazards

The Gulf of Mexico may experience se veral hurricanes thro ughout the season which typically runs from June thr ough November. A severe hurricane may impact the activities covered in this Pl an. Such impacts may be damage to the drilling rig, the unanticipated rel ease of hydrocarbons depending upon theMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 34 

## current status of the well. Additiona lly, the surface located in Mississippi Canyon Blocks 208 & 253 has the potential to be affected by the “Loop
Current” which is a warm ocean current in the Gulf of Mexico that flows
northward between Cuba and the Yucatan Peninsula, moves northward into the Gulf of Mexico, then loops east and south before exiting to the east through the Florida Straits. While the loop current is present approximately 95% of the time, it is most active in the summer and fall seasons.

To mitigate potential impacts to the well during impending hurricanes or loop currents, LLOG will take precautionary measures by securing the well, rig and evacuation of personnel; and will comply with the requir ements of NTL’s
2008-G09 and 2009-G10.



# E. Alternatives

LLOG did not consider any alternatives to reduce environmental impacts as a result of the proposed activities.



# F. Mitigation Measures

LLOG will not implement any mitigation measures to avoid, diminish or eliminate potential environmental resources, other than those required by regulation and policy.



# G. Consultation

LLOG has not contacted any agencies or persons for consultation regarding potential impacts associated with the proposed activities. Ther efore, a list of such entities is not being provided.



# H. Preparers

Questions or requests for additional in formation should be made to LLOG’s authorized representative of this Plan:

Carol Eaton Kathy Gowland Regulatory Administrator Regulatory Specialist 1001 Ochsner Boulevard, Suite 2000 1001 Ochsner Boulevard, Ste 2000 Covington, Louisiana 70433 Covington, Louisiana 70433 985-801-4300 (Phone) 985-801-4300 (Phone) Carole@llog.com Kathygo@llog.comMississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 35 

# I. References

The following documents were utilized in preparing the Environmental Impact Assessment:

Document Author Dated
Shallow Hazards Survey
3-D GeoHazard Assessment C&C Technologies Gardline Surveys, Inc. 2009

2009 BOEMRE Environmental Impact Statement Report No.

2007-003 Bureau of Ocean Energy Management, Regulation, and Enforcement 2007

Title 30 CFR Part 250 Subp art B (250.216 / 250.221 /
250.223 / 250.227 Bureau of Ocean Energy Management, Regulation, and Enforcement 2006

NTL 2000-G16 “Guidelines for General Lease Surety
Bonds” Bureau of Ocean Energy Management, Regulation, and Enforcement 2000

NTL 2005-G07 “Archaeological Resource Surveys and Reports” Bureau of Ocean Energy Management, Regulation, and Enforcement 2005

NTL 2006-N06 “Flaring and Venti ng Regulations” Bureau of Ocean Energy Management, Regulation, and Enforcement 2006

NTL 2006-G07 “Revisions to the List of OCS Lease Blocks Requiring Archaeological Surveys and Reports:” Bureau of Ocean Energy Management, Regulation, and Enforcement 2006

NTL 2007-G02 “Implementation of seismic Survey Mitigation Measures and Protected Species Observer Program” Bureau of Ocean Energy Management, Regulation, and Enforcement 2007

NTL 2007-G03 “Marine Trash & Debris Awareness &
Elimination” Bureau of Ocean Energy Management, Regulation, and Enforcement 2007

NTL 2007-G04 “Vessel Strike A voidance and Injured/Dead Protective Species” Bureau of Ocean Energy Management, Regulation, and Enforcement 2007

NTL 2008-G04 “Information Requi rements for Exploration Plans and Development Op erations Coordination

Documents” Bureau of Ocean Energy Management, Regulation, and Enforcement 2008

NTL 2008-N05 “Guidelines for Oil Spill Financial Responsibility for Covered Offshore Facilities” Bureau of Ocean Energy Management, Regulation, and Enforcement 2008

NTL 2008-G06 “Remotely Operated Vehicle Surveys in Deepwater” Bureau of Ocean Energy Management, Regulation, and Enforcement 2008

NTL 2008-N07 “Supplemental Bond Procedures Bureau of Ocean Energy Management, Regulation, and Enforcement 2008

NTL 2008-G20 “Revisions to the List of OCS Lease Blocks Requiring Archaeological Resource Surveys and Reports” Bureau of Ocean Energy Management, Regulation, and Enforcement 2008

NTL 2009-G02 “Ocean Current Monitoring” Bu reau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-G27 “Submitting E xploration Plans and Development Operations Coordination Documents” Bureau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-G29 “Implementation Plan for Transition from
North American Datum 27 to North American Datum 83” Bureau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-G31 “Hydrogen Sul phide” Bureau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-G34 “Ancillary Activities” Bur eau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-G38 “Drilling Window s, Eastern Gulf of
Mexico” Bureau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-G39 “Biologically-Sensitive Underwater
Features and Areas” Bureau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-G40 “Deepwater Benthic Communities” Bureau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2009-N11 “Air Quality Jurisdiction on the OC S” Bureau of Ocean Energy Management, Regulation, and Enforcement 2009

NTL 2010-N05 “Increased Safety Measures for Energy Development on the OCS” Bureau of Ocean Energy Management, Regulation, and Enforcement 2010

NTL 2010-N06 “Information Requirements for EP’s, DOCD’s, DPP on the OCS” Bureau of Ocean Energy Management, Regulation, and Enforcement 2010

NPDES General Permit GM G290000 EPA – Region VI 2007 Regional Oil Spill Response Plan LLOG Exploration Offs hore, L.L.C. 2010Mississippi Canyon Block 253 (OCS-G 24062) 6/16/2011 Mississippi Canyon Bl ock 208 (OCS-G-32303) Revised Exploration Plan 36 

# APPENDIX Q
ADMINISTRATIVE INFORMATION (30 CFR Part 250.228 and 250.262)

A. Exempted Information Description (Public Information Copies only

Excluded from the Public Informa tion copies are the following:

• Proposed bottomhole location information

• Proposed total well depths (measured and true vertical depth)

• Production Rates and Life of Reserves

• New and Unusual Technologies

• Geological and Geophysical Attachments



# B. Bibliography

The following documents were utilized in preparing this Plan:

Document Author Dated
Shallow Hazards Survey
3-D GeoHazard Assessment C&C Technologies Gardline Surveys, Inc. 2009

2009 BOEMRE Environmental Impact Statement Report – No.

2007-003 Bureau of Ocean Energy Management, Regulation, and Enforcement 2007

Regional Oil Spill Response Plan LLOG Exploration Offs hore, L.L.C. 2010