UNITED STATES GOVERNMENT MEMORANDUM

To: Public Information (MS 5030)

Plans Section, Office of Field Operations (MS 5231)

Public Information copy of Exploration Plan

Control # - N-09665

Type - Initial Exploration Plan

Lease(s) - OCS-G24066 Block - 258 Mississippi Canyon Area

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

Wells A, B, C, and D

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: October 18, 2012

# LLOG EXPLORATION OFFSHORE, L.L.C.

1001 Ochsner Boulevard, Suite 200 Covington, Louisiana 70433



# INITIAL EXPLORATION PLAN

OCS-G-24066

MISSISSIPPI CANYON BLOCK 258

PREPARED BY:

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

kathygo@llog.com

September 10, 2012

### LLOG EXPLORATION OFFSHORE, L.L.C.

INITIAL EXPLORATION PLAN

OCS-G-24066

MISSISSIPPI CANYON BLOCK 258

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 Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## 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 Exploration Offshore, LLC pr oposes the drilling, completion, testing

and installation of subsea wellhead and/or ma nifold for four (4) proposed locations for Lease OCS-G-24066, Mississippi Canyon Block 258.

The current lease operator a nd ownership are as follows:

Area/Block Lease No . Operator Ownership Mississippi Canyon Block 258,

OCS-G 24066 LLOG Exploration Offshore, Inc. LLOG Exploration Offshore, Inc



### Included as Attachment A is Form BOEM 137 “OCS Plan Information Form”, which provides for the drilling, sub-sea comple tion and testing of all well locations.

. 

## B. Location

Attachment B

– Well Location Plat

Attachment C – Bathymetry Map – Seafloor disturbance area with anchor

Radius



## C. Safety & Pollution Features

LLOG will utilize either a semi-submersible drilling rig or a DP semi-submersible rig for the proposed operations. A description of the drilling unit is included on the OCS Plans Information Form. Rig specifications will be made part of the Application for

Permit to Drill.

Safety features on the drilling unit will in clude well control, pollution prevention, and blowout prevention equipment as described in Title 30 CFR Part 250, Subparts C, D, E and G; and further clarified by BOEM’s No tices to Lessees, and currently policy making invoked by BOEM, EPA and USCG. Appr opriate life rafts, life jackets, ring buoys, etc., will be maintained on the facility at all times.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### Pollution prevention measures include instal lation of curbs, gutters, drip pans, and drains on the drilling deck areas to collect all contaminants and debris

.

D. 

## Storage Tanks and Vessels

The following table details the storage tanks and/or production vessels that will store oil (capacity greater than 25 bbls. or more) and be used to support th e proposed activities (MODU, barges, platforms, etc.):

Semi-submersible Rig:

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 -

.81
2917.8 4 11,671.2 Total 11,861.7



### DP Semi-submersible Rig:

Type of Storage

Tank Type of Facility Tank Capacity (bbls) Number of

tanks Total Capacity (bbls) Fluid Gravity (API) Fuel Oil (Marine Diesel) DP SemiSubmersible 164 1 164 0.876

Fuel Oil Day 367 2 734 0.876
Emergency

Generator 31 1 31 0.876

Forward Hull

Fuel Oil 4634 2 9268 0.876

Lower Aft Hull

Fuel Oil 3462 2 6924 0.876

Lube Oil

Services 117/10.5/4.6 3 132 0.8

Dirty Lube Oil 38/28 2 66 0.8

Dirty Bilge 190 4 760 0.1



## E. Pollution Prevention Measures: Not applicable. The State of Florida is not an affected State by the proposed activities in this plan.



## F. Additional measures : LLOG does not propose any additional safety, pollution prevention, or early detection measures, bey ond those required in 30 CFR 250 and per December 13, 2010 – Guidance for Deepwater Dr illers to Comply with Strengthened Safety and Environmental Standards.High Island Block A-7 (OCS-G 32758) 10/3/2011 Initial Exploration Plan 3 

# OCS Plan Information Form

Attachment A (Public Information)

### U.S. Department of the Interior OMB Control Number: 1010-0151 Bureau of Ocean Energy Management OMB Approval Expires: 12/31/2014


### OCS PLAN INFORMATION FORM

General Information

Type of OCS Plan: Exploration Plan (EP) Development Operations Coor dination Document (DOCD)

Company Name: BOEM 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 Onshore 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 platfo rm as well protection 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 Conser vation Information Document to accompany this plan? Yes No

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

Do you propose any facility that will serve as a ho st facility for deepwater subsea development? Yes No

Do you propose any activities that may disturb an BO EM-designated high-probability archaeological area? Yes No

Have all of the surface locations of your proposed activ ities been previously reviewed and approved by BOEM? 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 Description) 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) Diameter (Inches) Length (Feet)

FORM BOEM-0137 (December 2011 - Supersedes all previous editions of fo rm BOEM-0137 which may not be used.) Page 1 of 2High Island Block A-7 (OCS-G 32758) 10/3/2011 Initial Exploration Plan 4 

# Well Location Plats

Attachment B (Public Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Bathymetry Map

Attachment C (Public Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## 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 app lications and general pe rmits 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) See Appendix F, Table 1 of this Plan Oil–based (diesel, mineral oil) N/A Synthetic-based (internal olefin, ester) See Appendix F, Table 2 of this Plan



## C. New Or Unusual Technology

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



## D. Bonding Statement

The bond requirements for the activities and facilities proposed in th is Initial Exploration Plan are satisfied by an area wide bond, furnished and maintained according to 30 CFR Part 256; subpart I; NTL No. 2000-G16, “Guidelines for General Lease Surety Bonds,” and additional s ecurity under 30 CFR 256.53(d) and NTL No. 2008-N07 “Supplemental Bond Procedures.”



## E. Oil Spill Responsibility (OSFR)

LLOG Exploration Offshore, L.L.C (MMS Co. No. 02058) will demonstrate oil spill financial responsibility for the facilities proposed in this In itial EP according to 30 CFR Part 253, and NTL No. 2008-N05 “Guidelines for Oil Spill Financial Responsibility (OSFR) for Covered Facilities.”Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## F. Deepwater Well Co ntrol Statement

LLOG Exploration Offshore, L.L.C. (MMS Co. No. 02058) has the financial capability

to drill a relief well and conduct othe r emergency well control operations.



## G. Blowout Scenario

See the following Worst Case Discharge Calculations (Proprietary) – Attachment D and Blowout Scenario, including Site Specific Proposed Re lief Well and Intervention Planning and Relief Well Response Time Estimate (Public Information) - Attachment

D-1Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# NTL 2010-N06 Data

Worst Case Discharge Calculations

Attachment D

(Proprietary Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# NTL 2010-N06 Data

Blowout Scenario

Attachment D-1 (Public Information)BLOWOUT SCENARIO

MC 258 Created by: S.L. Stegeman
Last Revised: 9/6/2012 Page 1 of 7
Confidential

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 258 “A” OCS-G-24066 5850 1,289,805’ 10,431,383’ 28 ° 44’ 23.856” 88 ° 05’ 39.872” MC 258 “B” OCS-G-24066 5782 1,289,086’ 10,432,752’ 28 ° 44’ 37.347” 88 ° 05’ 48.092” MC 258 “C” OCS-G-24066 5784 1,288,213’ 10,435,298’ 28 ° 45’ 02.481” 88 ° 05’ 58.165” MC 258 “D” OCS-G-24066 5850 1,290,014’ 10,434,144’ 28 ° 44’ 51.217” 88 ° 05’ 37.809”

INFORMATION REQUIREMENTS

A) Blowout scenario

The MC 258 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 258 Facility Designation MODU Distance to Nearest Shoreline (miles) ~62 N-M Uncontrolled Blowout (Volume per day) 78,811 bbls Type of Fluid Crude

C) Total volume and maximum duration of the potential blowout

Duration of Flow (days) 94 days total (see Relief Well Response Estimate below) Total Volume of Spill (bbls) 7.4 MMBO based on 94 days of uncontrolled flow

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

See Attachment D-1 of this Plan - Omitted from Public Information Copies

E) Potential for the well to bridge over

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 fluidBLOWOUT SCENARIO

MC 258 Created by: S.L. Stegeman
Last Revised: 9/6/2012 Page 2 of 7
Confidential

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 intervention equipment may also require modificati ons based on actual wellbore conditions. StandardBLOWOUT SCENARIO

MC 258 Created by: S.L. Stegeman
Last Revised: 9/6/2012 Page 3 of 7
Confidential

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

MC 258 Created by: S.L. Stegeman
Last Revised: 9/6/2012 Page 4 of 7
Confidential

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 site assessment of the seafloor conditions for intervention operations. Relief well equipment such asBLOWOUT SCENARIO

MC 258 Created by: S.L. Stegeman
Last Revised: 9/6/2012 Page 5 of 7
Confidential

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 ~10 miles from ExxonMobil MC 211 and ~12 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 7 relief well surface locations are proposed for the 4 drill sites in the Proposed Exploration Plan wells. These 4 drill sites are the most probable well sites for a development scenario. Based on actual seafloor st ate unforeseen at this time, the final location(s) may need to be revised. The locations have been sele cted based on proximity to the targets sands and potential shallow hazards.BLOWOUT SCENARIO

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Last Revised: 9/6/2012 Page 6 of 7
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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 (Helix 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

• 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 14BLOWOUT SCENARIO

MC 258 Created by: S.L. Stegeman
Last Revised: 9/6/2012 Page 7 of 7
Confidential

• continue spill control measures RELIEF WELL(S) OPERATIONS

• continue intervention and containment measures

• continue spill control measures

• drill relief well (s) 55

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 94 SECURE RELIELF WELL(S) / PERFORM P&A / TA OPERATIONS / DEMOBE 30

TOTAL DAYS 124Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX C

GEOLOGICAL AND GEOPHYSICAL INFORMATION (30 CFR Part 250.214 and 250.244)

A. Geological Description

Included as Attachment E are the geological targets and a narrative of trapping features proposed in this Plan



## B. Structure Contour Maps

Included as Attachment F 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 applicable geological cross section.



## C. Interpreted Seismic Lines

Included as Attachment G is a copy of the migrated and annotated (shot points, time lines, well paths) deep seismic line with in 500 feet of the surface location being proposed in this Plan.



## D. Geological Structure Cross-Sections

An interpreted geological cross section depi cting the proposed well locations and depth of the proposed wells is included as Attachment H . Such cross section corresponds to each seismic line being submitted.



## E. Shallow Hazards Report

Berger Geosciences, LLC conducted a Shallow Hazards Assessment, Benthic Communities Evaluation, and Archaeological Resource Survey for Mississippi Canyon Block 258 (OCS-G 24066) on beha lf of LLOG Explor ation Offshore, Inc. The purpose of the survey was to evaluate geologic conditions and inspect for potential hazards or constraints to lease development. The report was submitted to BOEM under separate cover on September 4, 2012.



## F. Shallow Hazards Assessment

Utilizing the 3D deep seismic exploration data a shallow hazards analysis was prepared for the proposed surface locations, evaluati ng seafloor and subsurface geologic and manmade features and conditions, and is included as Attachment I.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## G. High Resolution Seismic Lines

LLOG provided exploration 3-D seismic data for the evaluation of the proposed surface disturbance operations.



## H. Stratigraphic Column

A generalized biostratigraphic/ lithostratigraphic column from the seafloor to the total depth of the proposed wells is included as Attachment J.



## I. Time vs Depth Tables

LLOG has determined that there is existing sufficient well control data for the target areas proposed in this Plan; therefore, tables providing seismic time versus depth for the proposed well locations are not required.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Geological Description

Attachment E (Proprietary Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Structure Maps

Attachment F (Proprietary Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Deep Seismic Lines

Attachment G (Proprietary Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Cross Section Maps

Attachment H (Proprietary Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Shallow Hazards Assessment

Attachment I (Public Information)Tesla Offshore, LLC

36499 Perkins Road Prairieville, Louisiana 70769 Telephone: (225) 673

- 2163 Fax: (225) 744

- 3116

August 17 , 2012 Job No. 12

- 072

- 11

Bureau of Ocean Energy Management ( MS 5230) Gulf of Mexico OCS Region

1201 Elmwood Park Blvd. New Orleans, LA 70123

- 2394

RE: LLOG Exploration Offshore, L

. L

. C

. Proposed OCS

- G 24066 ‘ A ’ Well

Block 2 58

, Mississippi Canyon Area Archaeological Assessment

LLOG Exploration Offshore, L

. L

. C

. , proposes to drill the OCS

- G 24066 ‘ A ’ Well f rom the following surface location :

Datum:

NAD 27 Spheroid:

Clarke 1866 Projecti on:

UTM Zone:

16 Central Meridian:

87° 0 0’ West

Latitude: 28 ° 4 4 ’ 23.856 ” N Longitude: 88° 05 ’ 39.872 ” W

X: 1,289,805 .00 Y: 10,431,383 .00

FWL: 6,765 ’ FNL: 7,177 ’

Tesla Offshore conducted a high

- resolution g eophysical survey centered on Block 2 58

, Mississippi Canyon Area between February 21 st and April 5 th , 2012 , using 25 0

- meter primary grid spacing and 900

- meter tie lines

. LLOG Exploration Offshore, L

. L

. C

. selected Tesla Offshore, LLC to prepare this archae ological assessment for the proposed drill site to comply with NTL No. 2005

- G07 published by the Bureau of Ocean Energy Management (BOEM ) , Gulf of Mexico Region

. Geophysical record copies are

enclosed for the side scan sonar, su bbottom profiler, and singl e

- beam echo sounder from the survey line nearest the proposed wel l site as required by the BOEM in NTL No.

200 8

- G 04

. LLOG has commissioned a separate hazards survey utilizing 3

- D seismic data, which will address shallow hazards and potential deepwater ben thic communities.

Water depth is approximately 5, 850 feet surrounding the proposed drill site. The location is positioned on a gradual slope and the seafl oor slopes to the east at an
estimated rate of 450 feet/mile

.

Seafloor s ediments reportedly co nsist of clays and marine deposits ( MMS 1983 Visual No. 3; MMS 1986 Visual No. 5 ).

Seafloor installations located within 1,000’ of the proposed surface location include the 2” BP pipeline (Segment 17364 ) located approximately 75 0’ S E at its closest point

. Additionally the only other infrastructure located within the surveyed area is the 2” BP pipeline (Segment 17851) which is located approximately 3,1 00’ to theTESLA OFFSHORE

LLOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘A’ Well Block 258, Mississippi Canyo n Area Archaeological Assessment Page 2

NE at its closest point. The pipelines were too small to be resolved by sonar or multibeam data, therefore this assessment is based on the published as

- built pipeline positions.

M agnetometer data acquisition is not required , per NTL 2005

- G07, since water depths exceed 200 meters (656 feet) throughout the entire survey grid.

Side scan sonar verified that the seafloor immediately surrounding the proposed well site was clear of protruding obstructions. The seafloo r at the well location

appears lightly reflective and exhibits no significant seafloor features , apart from nearby fault scarps

. Two areas interpreted as surficial mass transport depos i ts are located approximately 520 ’ to the SE and 1,330 ’ NE of the surfa ce location. The

closest observed sonar target is no. 4, located in Block 258 a pproximately 570 ’ to the

W NW. This target appears amorphous in shape and measures approximately 13’ x 6’ with no visible relief above the seafloor. Target 4 is not considered to represent possible cultural resources and has been designated for avoidance as a potential

hazard only

. S onar target s designated for avoidance as potential cultural resource s

are located over 1 5

, 000’ southeast of the proposed surface location. The ta rgets are located beyond the extent of the proposed anchor radius, however the avoidance zone is intersected by the radius. As long as he designated avoidance criteri on of 2,000’ is adhered to there should be no impact to the potential resource ; the porti on of the avoidance zone within the proposed radius will be designated as a no

anchorage area

. Areas of high seafloor reflectivity and possible outcrops were also identified within the survey grid, however none are located within the immediate vicinity of the proposed surface location.

Subbottom data nearest the proposed location resolved a strongly reflective

seafloor. Surficial sediments underlying the proposed surface location appear as weakly to moderately reflecti ng, acoustically amorphous deposits approximately 5 ’

thick

, overlying 10’ of poorly stratified, moderately reflective sediment, followed by approximately 100

- 125’ of well

- stratified parallel to subparallel, strongly to moderately reflective sediments before the record becomes attenuated

. Ae rially
extensive fault zones were mapped throughout the southwestern portion of the survey grid and isolated subsurface faults were identified within the central portion of the survey , but none were o bserved within 1,000 ’ of the proposed surface location

. The nearest observed fau lt is located approximately 3,13 0’ to the SW and appears to

be an isolated fault identif ied at a depth of 5’ BML exhibiting 2’ of displacement to the

NW. The proposed drill site is located within an area of mass transport deposits observed on the subbottom profiler data at a depth of approximately 8’ BML

. Additionally, gas fronts and areas of acoustic vertical wipeout were identified throughout the surveyed grid. None of these f eatures are located within the vicinity

of the propos ed surface location.TESLA OFFSHORE

LLOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘A’ Well Block 258, Mississippi Canyon Area Archaeological Assessment Page 3

The operator has identified the primary hazards to rig movements, any ancillary
anchor/moorin g deployments, and drilling. No evidence of potential cultural resources was observed at the well location. The proposed well site will be marked with DGPS during rig moves and drilling to comply with the BOEM On

- Site Requirements specified

in NTL No. 20 08

- G05, Section VI, Item B

- 2(a).

Pursuant to 30 CFR 550.194 (c), 30 CFR 550.101 (c), and NTL No. 2005

- G07 , if any archaeological or potentially historically significant materials are observed during lease development, operations will immediately cease i n that area and appropriate BOEM personnel will be notified within 48 hours of discovery.

The operator and subcontractors will apply the safest and best available technologies during rig moves and drilling operations.

Sincerely

,

Matt Keith Erin Voisin, MA
G eoscience Manager ArchaeologistTesla Offshore, LLC

36499 Perkins Road Prairieville, Louisiana 70769 Telephone: (225) 673

- 2163 Fax: (225) 744

- 3116

August 17 , 2012 Job No. 12

- 072

- 11

Bureau of Ocean Energy Management ( MS 5230) Gulf of Mexico OCS Region

1201 Elmwood Park Blvd. New Orleans, LA 70123

- 2394

RE: LLOG Exploration Offshore, L

. L

. C

. Proposed OCS

- G 24066 ‘ B ’ Well

Block 2 58

, Mississippi Canyon Area Archaeological Assessment

LLOG Exploration Offshore, L

. L

. C

. , proposes to drill the OCS

- G 24066 ‘ B ’ Well f rom the following surface location :

Datum:

NAD 27 Spheroid:

Clarke 1866 Projecti on:

UTM Zone:

16 Central Meridian:

87° 0 0’ West

Latitude: 28 ° 4 4 ’ 37.347 ” N Longitude: 88° 05 ’ 48.092 ” W

X: 1,289,086 .00 Y: 10,43 2,752 .00

FWL: 6,046 ’ FNL: 5,808 ’

Tesla Offshore conducted a high

- resolution g eophysical survey centered on Block 2 58

, Mississippi Canyon Area between February 21 st and April 5 th , 2012 , using 25 0

- meter primary grid spacing and 900

- meter tie lines

. LLOG Exploration Offshore, L

. L

. C

. selected Tesla Offshore, LLC to prepare this archae ological assessment for the proposed drill site to comply with NTL No. 2005

- G07 published by the Bureau of Ocean Energy Management (BOEM ) , Gulf of Mexico Region

. Geophysical record copies are

enclosed for the side scan sonar, su bbottom profiler, and singl e

- beam echo sounder from the survey line nearest the proposed wel l site as required by the BOEM in NTL No.

200 8

- G 04

. LLOG has commissioned a separate hazards survey utilizing 3

- D seismic data, which will address shallow hazards and potential deepwater ben thic communities.

Water depth is approximately 5, 782 feet surrounding the proposed drill site. The

seafl oor slopes to the east at an estimated rate of 3 50 feet/mile

.

Seafloor s ediments reportedly consist of clays and marine deposits ( MMS 1983

Visua l No. 3; MMS 1986 Visual No. 5 ).

No Seafloor installations are located within 1,000’ of the proposed surface location

. The nearest infrastructure is t he 2” BP pipeline (Segment 17364) is located approximately 2,16 0 ’ SE at its closest point and the 2” BP p ipeline (Segment 17851)

located approximately 3,30 0 ’ E at its closest point. The pipelines were too small to be resolved by sonar or multibeam data, therefore this assessment is basedTESLA OFFSHORE

LLOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘B ’ Well

Blo ck 258, Mississippi Canyon Area Archaeological Assessment Page 2

on the published as

- built pipeline positions.

M agnetometer data acquisition is not required , per NTL 2005

- G07, since water depths exceed 200 meters (656 feet) throughout the entire survey grid.

Side scan sonar verified that the seafloor immediately surrounding the proposed well site was clear of protruding obstructions. The seafloor at the well location

appears lightly reflective and exhibits no significant seafloor features . The closes t
observed sonar target is no. 4, located in Block 258 a pproximately 4,800 ’ to the west

. This target is amorphous in shape and measures 13’ x 6’ with no visible relief above the seafloor. Target 4 is not considered to represent possible cultural resource s and has been designated for avoidance as a potential hazard only

. The nearest sonar target designated for avoidance as a potential cultural resource is located approximately 17,1 6 0’ SE of the proposed surface location , outside of the proposed

anchor rad ius for this proposed surface location. The anchor radius will not intersect the avoidance zone for this, or any other sonar target, and t his potential cultural resource will not be impacted by drilling activities. Surficial areas of mass transport depos i ts are located approximately 1,3 00’ E SE of the proposed surface location. Areas of high reflectivity and possible outcrops were observed, however none are located within 2,000’ of the proposed surface location.

Subbottom data nearest the proposed locati on resolved a strongly reflective

seafloor. Near

- seafloor sediments underlying the proposed surface location appear as weakly reflecting, acoustically amorphous deposits approximately 7 ’ thick

, followed by approximately 195’ of well

- stratified parallel to subparallel, strongly to moderately reflective sediments before the record becomes attenuated

. Aerially

extensive fault zones were mapped throughout the southwestern portion of the survey grid and isolated subsurface faults were identified within the cen tral portion of the survey , but none were observed within 2 ,000 ’ of the proposed surface location

. The nearest observed fault is located approximately 3,42 0 ’ to the SW and appears to be an isolated fault identified at a depth of 5 ’ BML exhibiting 2’ of dis placement to the NW. Areas of subsurface mass transport deposits were observed approximately 1,3 00’ SE and 1,260’ N E of the proposed surface location. Subbottom data also recorded sporadic gas fronts and areas of acoustic vertical wipeout throughout the surveyed grid. None of these f eatures are located within the immediate vicinity of the proposed surface location.

The operator has identified the primary hazards to rig movements, any ancillary anchor/mooring deployments, and drilling. No evidence of potential cultural resources was observed at the well location. The proposed well site will be marked with DGPS during rig moves and drilling to comply with the BOEM On

- Site Requirements specified

in NTL No. 2008

- G05, Section VI, Item B

- 2(a).

Pursuant t o 30 CFR 250.194 (c), 30 CFR 250.101 (c), and NTL No. 2005

- G07 , if any archaeological or potentially historically significant materials are observed during leaseTESLA OFFSHORE

LLOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘B’ Well Block 258, Mississippi Canyo n Area Archaeological Assessment Page 3

development, operations will immediately cease in that area and appropriate BOEM personnel will be notified within 48 hours of discovery.

The operator and subcontractors will apply the safest and best available technologies during rig moves and drilling operations.

Sincerely

,

Matt Keith Erin Voisin, MA
G eoscience Manager ArchaeologistTesla Offshore, LLC

36499 Perkins Road Prairieville, Louisiana 70769 Telephone: (225) 673

- 2163 Fax: (225) 744

- 3116

August 17 , 2012 Job No. 12

- 072

- 11

Bureau of Ocean Energy Management ( MS 5230) Gulf of Mexico OCS Region

1201 Elmwood Park Blvd. New Orleans, LA 70123

- 2394

RE: LLOG Exploration Offshore, L

. L

. C

. Proposed OCS

- G 24066 ‘ C ’ Well

Block 2 58

, Mississippi Canyon Area Archaeological Assessment

LLOG Exploration Offshore, L

. L

. C

. , proposes to drill the OCS

- G 24066 ‘ C ’ Well f rom the following surface location :

Datum:

NAD 27 Spheroid:

Clarke 1866 Projecti on:

UTM Zone:

16 Central Meridian:

87° 0 0’ West

Latitude: 28 ° 4 5 ’ 02.481 ” N Longitude: 88° 05 ’ 58.165 ” W

X: 1,288,213 .00 Y: 10,4 35,298 .00

FWL: 5,173 ’ FNL: 3,262 ’

Tesla Offshore conducted a high

- resolution ge ophysical survey centered on Block 2 58

, Mississippi Canyon Area between February 21 st and April 5 th , 2012 , using 25 0

- meter primary grid spacing and 900

- meter tie lines

. LLOG Exploration Offshore, L

. L

. C

. selected Tesla Offshore, LLC to prepare this archaeo logical assessment for the proposed drill site to comply with NTL No. 2005

- G07 published by the Bureau of Ocean Energy Management (BOEM ) , Gulf of Mexico Region

. Geophysical record copies are

enclosed for the side scan sonar, su bbottom profiler, and single

- beam echo sounder from the survey line nearest the proposed wel l site as required by the BOEM in NTL No.

200 8

- G 04

. LLOG has commissioned a separate hazards survey utilizing 3

- D seismic data, which will address shallow hazards and potential deepwater bent hic communities.

Water depth is approximately 5, 784 feet surrounding the proposed drill site. The

seafl oor slopes to the east at an estimated rate of 2 50 feet/mile

.

Seafloor s ediments reportedly consist of clays and marine deposits ( MMS 1983

Visual No. 3; MMS 1986 Visual No. 5 ).

No Seafloor installations are located within 1,000’ of the proposed surface location

. The nearest infrastructure is the 2” BP pipeline (Segment 17364) located approximately 4,5 3 0 ’ SE at its closest point and the 2” BP pipe line (Segment 17851)

located approximately 4,69 0 ’ to the SE at its closest point. The pipelines were too small to be resolved by either sonar or multibeam data, therefore this assessment is based on the published as

- built positions for these pipelines.TESLA OFFSHORE

L LOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘C ’ Well Block 258, Mississippi Canyon Area Archaeological Assessment Page 2

M agnetometer data acquisition is not required , per NTL 2005

- G07, since water depths exceed 200 meters (656 feet) througho ut the entire survey grid.

Side scan sonar verified that the seafloor immediately surrounding the proposed well site was clear of protruding obstructions. The seafloor at the well location

appears lightly reflective and exhibits no significant seafloor features . The closest

observed sonar target is no. 4, located in Block 258 a pproximately 4,58 0’ to the S W. This target is amorphous in shape and measures 13’ x 6’ with no visible relief above the seafloor. Target 4 is not considered to represent possibl e cultural resources and has been designated for avoidance as a potential hazard only

. The nearest sonar target designated for avoidance as a potential cultural reso urc e is located approximately 19,30 0’ southeast of the proposed surface location. This po tential cultural resource will not be impacted by drilling activities , as both it and its associated avoidance zone are completely outside of the proposed anchor radius for

this surface location

. Areas of high reflectivity, possible outcrops, and surficia l areas of mass transport deposits were also identified throughout the survey grid, none of

which are located within the immediate vicinity of the proposed surface location.

Subbottom data nearest the proposed location resolved a strongly reflective

seafl oor. Near

- surface sediments underlying the proposed surface location appear as weakly reflecting, acoustically amorphous deposits approximately 7 ’ thick

, followed by approximately 195’ of well

- stratified parallel to subparallel, strongly to moderately ref lective sediments before the record becomes attenuated

. Aerially

extensive fault zones were mapped throughout the southwestern portion of the survey grid and isolated subsurface faults were identified within the central portion of the survey , but none wer e observed within 2 ,0 00’ of the proposed surface location

. The nearest observed fault s are located approximately 4,60 0 ’ to the NE and appear s to be an isolated fault identified at a depth of 23’ BML with minimal displacement of

2’ to the NW

. Areas of subs urface mass transport deposits, gas fronts, and areas of acoustic vertical wipeout were identified throughout the surveyed grid , however none

of these features are located within 2,000’ of the proposed surface location.

The operator has identified the p rimary hazards to rig movements, any ancillary anchor/mooring deployments, and drilling. No evidence of potential cultural resources was observed at the well location. The proposed well site will be marked with DGPS during rig moves and drilling to compl y with the BOEM On

- Site Requirements specified

in NTL No. 2008

- G05, Section VI, Item B

- 2(a).

Pursuant to 30 CFR 250.194 (c), 30 CFR 250.101 (c), and NTL No. 2005

- G07 , if any archaeological or potentially historically significant materials are observed du ring lease development, operations will immediately cease in that area and appropriate BOEM personnel will be notified within 48 hours of discovery.TESLA OFFSHORE

LLOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘C’ Well Block 258, Mississippi Canyon Area

Arc haeological Assessment Page 3

The operator and subcontractors will apply the safest and best available technologies during rig moves and drilling operations.

Sincerely

,

Matt Keith Erin Voisin, MA
G eoscience Manager ArchaeologistTesla Offshore, LLC

36499 Perkins Road Prairieville, Louisiana 70769 Telephone: (225) 673

- 2163 Fax: (225) 744

- 3116

August 17 , 2012 Job No. 12

- 072

- 11

Bureau of Ocean Energy Management ( MS 5230) Gulf of Mexico OCS Region

1201 Elmwood Park Blvd. New Orleans, LA 70123

- 2394

RE: LLOG Exploration Offshore, L

. L

. C

. Proposed OCS

- G 24066 ‘ D ’ Well

Block 2 58

, Mississippi Canyon Area Archaeological Assessment

LLOG Exploration Offshore, L

. L

. C

. , proposes to drill the OCS

- G 24066 ‘ D ’ Well f rom the following surface location :

Datum:

NAD 27 Spheroid:

Clarke 1866 Projecti on:

UTM Zone:

16 Central Meridian:

87° 0 0’ West

Latitude: 28 ° 4 4 ’ 51.217 ” N Longitude: 88° 05 ’ 37.809 ” W

X: 1,290,014 .00 Y: 10,4 34,144 .00

FWL: 6,974 ’ FNL: 4,416 ’

Tesla Offshore conducted a high

- resolution ge ophysical survey centered on Block 2 58

, Mississippi Canyon Area between February 21 st and April 5 th , 2012 , using 25 0

- meter primary grid spacing and 900

- meter tie lines

. LLOG Exploration Offshore, L

. L

. C

. selected Tesla Offshore, LLC to prepare this archaeo logical assessment for the proposed drill site to comply with NTL No. 2005

- G07 published by the Bureau of Ocean Energy Management (BOEM ) , Gulf of Mexico Region

. Geophysical record copies are

enclosed for the side scan sonar, su bbottom profiler, and single

- beam echo sounder from the survey line nearest the proposed wel l site as required by the BOEM in NTL No.

200 8

- G 04

. LLOG has commissioned a separate hazards survey utilizing 3

- D seismic data, which will address shallow hazards and potential deepwater bent hic communities.

Water depth is approximately 5,8 35 feet surrounding the proposed drill site. The

seafl oor slopes to the east at an estimated rate of 30 0 feet/mile

.

Seafloor s ediments reportedly consist of clays and marine deposits ( MMS 1983

Visual No. 3; MMS 1986 Visual No. 5 ).

No Seafloor installations are located within 1,000’ of the proposed surface location

. The nearest infrastructure is the 2” BP pipeline (Segment 17364) located approximately 2,42 0’ SE at its closest point and the 2” BP pip eline (Segment 17851)

located approximately 2,57 0’ to the SE at its closest point. The pipelines were too small to be resolved by either sonar or multibeam data, therefore this assessment is based on the published as

- built positions for these pipelines.TESLA OFFSHORE

L LOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘D ’ Well Block 258, Mississippi Canyon Area Archaeological Assessment Page 2

M agnetometer data acquisition is not required , per NTL 2005

- G07, since water depths exceed 200 meters (656 feet) througho ut the entire survey grid.

Side scan sonar verified that the seafloor immediately surrounding the proposed well site was clear of protruding obstructions. The seafloor at the well location

appears lightly reflective and exhibits no significant seafloor f eatures . The closest

observed sonar target is no. 4, located in Block 258 a pproximately 5,86 0’ to the

W S W. This target is amorphous in shape and measures 13’ x 6’ with no visible relief above the seafloor. Target 4 is not considered to represent possibl e cultural resources and has been designated for avoidance as a potential hazard only

. The nearest sonar target designated for avoidance as a potential cultural resourc e is

located over 17,000’ SE of the proposed surface location. This potential cultural resource will not be impacted by drilling activities , as both the target and its associated avoidance zone are completely outside of the proposed anchor radius

. Surficial areas of mass transport deposits were observed approx imately 1,73 0’ to the
S S E of t he proposed surface location. Sonar data also recorded areas of high

ref lectivity and possible outcrops; however

, none of these are located within 2,000’ of the proposed surface location.

Subbottom data nearest the proposed location resolved a strongly r eflective

seafloor. Near

- seafloor sediments underlying the proposed surface location appear as weakly reflecting, acoustically amorphous deposits approximately 7 ’ thick

, followed by approximately 195 ’ of well

- stratified parallel to subparallel, strongly t o moderately reflective sediments before the record becomes attenuated

. Aerially

extensive fault zones were mapped throughout the southwestern portion of the survey grid and isolated subsurface faults were identified within the central portion of

the surv ey , but none were observed within 2 ,000 ’ of the proposed surface location

. The nearest observed fa ult is located approximately 4,04 0 ’ to the NE and appears to
be an isolated fault identified at a depth of 23’ BML exhibiting 2’ of displacement to

the NW. A reas of subs urface mass transport deposits were mapped throughout the survey, the nearest of which is located approximately 450’ feet SE of the proposed location. Additionally, gas fronts and areas of acoustic vertical wipeout were identified throughout t he surveyed grid , none of which are located within the vicinity of the proposed surface location.

The operator has identified the primary hazards to rig movements, any ancillary anchor/mooring deployments, and drilling. No evidence of potential cultur al resources was observed at the well location. The proposed well site will be marked with DGPS during rig moves and drilling to comply with the BOEM On

- Site Requirements specified

in NTL No. 2008

- G05, Section VI, Item B

- 2(a).

Pursuant to 30 CFR 250.194 (c), 30 CFR 250.101 (c), and NTL No. 2005

- G07 , if any archaeological or potentially historically significant materials are observed during lease development, operations will immediately cease in that area and appropriate BOEM personnel will be notified wi thin 48 hours of discovery.TESLA OFFSHORE

LLOG Exploration Offshore, L.L.C. Proposed OCS

- G 24066 ‘D’ Well Block 258, Mississippi Canyon Area Archaeological Assessment Page 3

The operator and subcontractors will apply the safest and best available technologies

duri ng rig moves and drilling operations.

Sincerely

,

Matt Keith Erin Voisin, MA
G eoscience Manager ArchaeologistMississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Stratigraphic Column

Attachment J (Proprietary Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## 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

In accordance with 30 CFR 250.490© and NTL No. 2009-G31 “Hydrogen Sulfide”, LLOG requests that the proposed locatio ns be classified H2S absent.



## C. H2S Contingency Plan

Not applicable for the proposed operations.



## D. Modeling Report

Not applicable to the proposed operations.



## APPENDIX E BIOLOGICAL, PHYSICAL AND SO CIOECONOMIC INFORMATIONMississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

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

A. High-Density Deepwater Benthi c Communities Information

Seafloor amplitude anomalies can help id entify possible areas of hydrocarbon seepage

and/or carbonate accumulati ons that could support chemos ynthetic or other benthic communities. Isolated areas of high-amplitude response which may represent authigenic carbonates or other exposed hard surfaces are located in the southern portion

of the maximum anchor radius in association with Mobi le Dome. These areas may support benthic communities. The high-amplitu de seafloor forms linear bands located in the western portion of the maximum anchor radius. These areas are interpreted as data artifacts as a result of processing. Th e areas of high seafloor amplitude return along the basin margin in the southeastern portion of the anchor assessment area are likely represent more consolidated sedime nts resulting from slump deposition along the steep escarpment. There is no indication of faulting or fluid migration to the seafloor near these areas. Therefore, the seafloor amplitude anomalies in those areas are not interpreted to represent high-dens ity benthic comm unity habitat.

Features or areas that coul d support high-density chem osynthetic or other benthic communities are located in the areas associated with high-amplitude response

associated with Mobile Dome in the southern portion of the maximum anchor radius of proposed Well MC 258-C.



## B. Topographic Features Map

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



## C. Topographic Features Statement (Shunting)

The activities proposed in this Plan are not affected by a topographic feature; therefore, LLOG is not required to shunt dr ill cuttings and drill fluids.



## D. Live Bottoms (Pinnacle Trend) Map

Mississippi Canyon Block 258 is not located w ithin the vicinity of a proposed live bottom (Pinnacle trend) area.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## E. Live Bottoms (Low Relief) Map

Mississippi Canyon Block 258 is not located w ithin the vicinity of a proposed live bottom (Low Relief) area.



## F. Potentially Sensitive Biological Features Map

Mississippi Canyon Block 258 is not located within the vicinity of a proposed sensitive biological feature area.



## G. Remotely Operated Vehicle (ROV ) Monitoring Survey Plan

Mississippi Canyon Block 258 is located in Grid 16 an area for which there is adequate coverage and does not re quire a ROV survey.

H. 

## Threatened or Endangered Species, Critical Habitat, and Marine

Mammal Information.

Proposed activities in Mississippi Canyon Block 258 is not located in the presence of federally listed threatened or endangered species and critical ha bitat designated under the ESA and marine mammal pr otected under the MMPA. See Attachment K for a list of the NOAA Species known in the Gulf of Mexico.

I. 

## Archaeological Report

Berger Geosciences, LLC conducted a Shallow Hazards Assessment, Benthic Communities Evaluation, and Archaeological Resource Survey for Mississippi Canyon Block 258 (OCS-G 24066) on beha lf of LLOG Explor ation Offshore, Inc. The purpose of the survey was to evaluate geologic conditions and inspect for potential hazards or constraints to lease development. The report was submitted to BOEM under separate cover on September 4, 2012. An Archaeo logical Deep Tow Survey, Block 258, Mississippi Canyon Area, OCS-G 24066, was prep ared by Tesla Offshore, LLC in June 2012 for LLOG Exploration Offshore, L.L.C ., which was submitted to BOEM on June 12, 2012.



## J. Air and Water Quality Information

Not applicable to proposed operations.



## K. Socioeconomic Information

Not applicable to proposed operations.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# NOAA Species Known in GOM

Attachment K (Public Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX F

WASTE AND DISCHARGE 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 amountMC258Projected 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 WBM55,554 bbls/well9,811 bbls/day/well Discharge overboard NoCuttings wetted with water-based fluidCuttings generated while usingwater based drilling fluid. 2,544 bbls/well449 bbls/day/wellDischarge overboard NoCuttings wetted with synthetic-based fluidCuttings generated while usingsynthetic based drilling fluid. 2,012 bbls/well 98 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 25,194 bbls/well2.7 bbls/hr/wellDischarge overboard (no freeoil)NoSanitary wasteProcessed sanitary waste fromliving quarters 16,796 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 forcompletion operations 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 GOMDownholeDisposalplease specify if the amount reported is a total or per well amountMC258Projected 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 GOMDownholeDisposalMiscellaneous 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 258Projectedgenerated wasteSolid and LiquidWastsesTransportationType 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 Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX G

AIR EMISSIONS INFORMATION (30 CFR PART 250.218AND 250.249)

A. Emissions Worksheets and Screening Questions

The Projected Quality Emissions Report (Form MMS-138) addresses the proposed drilling, completion and potential testi ng operations utilizi ng a typical semisubmersible drilling unit, with related support vesse ls and construction barge

information.

As evidenced by Attachment L, 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) Emis sion amount (in tons associated with your proposed exploration activities more than 90% of the amounts calculated using the following formulas: CT = 3400D(2/3) for CO, and CT = 33.3D for the other air pollutants (where D = distance to shore in miles)? X

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 th e exemption level; ther efore, 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 L.



## D. Non-Exempt Activities

The proposed activities are within th e exemption amount as provided in Attachment L.



## E. Modeling Report

This section of the Plan is not a pplicable to the proposed operations.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Air Quality Emissions Report

Attachment L (Public Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012

COMPANY LLOG Exploration Offshore, L.L.C.

AREA Mississippi Canyon

BLOCK 258

LEASE OCS-G-24066

PLATFORM

WELL Locations A - D

COMPANY

CONTACT Kathy Gowland

TELEPHONE NO. 985-801-4300

REMARKS Semi-submersible and DP Semi-submersible Rigs



### Semi-Submersible Rig

Air Pollutant Plan Emission

Amounts* (tons) Calculated Exemption

Amounts** (tons) Calculated Complex Total

Emission

Amounts*** (tons)
Carbon monoxide (CO) 141.70 53260.68 N/A Particulate matter (PM) 18.89 2064.60 N/A Sulphur dioxide (SOx) 86.68 2064.60 N/A Nitrogen oxides (NOx) 649.47 2064.60 N/A Volatile organic compounds (VOC) 19.48 2064.60 N/A
*For activities proposed in your EP, list the projected emissi ons calculated from the worksheet. **List the exemption amounts in your proposed activities calc ulated using the formulas in 30 CFR 250.303(d). ***List the complex total emissions a ssociated with your porposed activi ties calculated from the worksheets.



### DP Semi-Submersible Rig

Air Pollutant Plan Emission

Amounts* (tons) Calculated Exemption

Amounts** (tons) Calculated Complex Total

Emission

Amounts*** (tons)
Carbon monoxide (CO) 307.01 53260.68 N/A Particulate matter (PM) 40.93 2064.60 N/A Sulphur dioxide (SOx) 187.79 2064.60 N/A Nitrogen oxides (NOx) 1407.11 2064.60 N/A Volatile organic compounds (VOC) 42.21 2064.60 N/A
*For activities proposed in your EP, list the projected emissi ons calculated from the worksheet. **List the exemption amounts in your proposed activities calc ulated using the formulas in 30 CFR 250.303(d). ***List the complex total emissions a ssociated with your porposed activi ties calculated from the worksheets.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX H

OIL SPILL INFORMATION (30 CFR PART 250.219 AND 250.250)

A. 

## Oil Spill Response Planning

The proposed activities in this Supplemental Exploration Plan will be covered by the Oil Spill Response Plan filed by LLGO (MMS Operator No. 020258) in accordance with 30 CFR 254 and approved on June 3, 200 9, modified October 5, 2010, November 10, 2010, January 13, 2011, March 15, 2011 and modi fication received June 8, 2011. Certification letter accepted July 11, 2011. A dditionally, the most recent modifications were received by BOEM on December 14, 20 11 and May 30, 2012. Biennial update and revisions to OSRP approved by BOEM as of August 8, 2012

The WCD proposed in this Plan does not exceed the WCD outlined in our OSRP.

B. 

## Spill Response Sites

The following locations will be used in the ev ent 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 spil l response in additi on to contacting and deploying cleanup personnel and equipment

LLOG utilizes Clean Gulf Associates (CGA) as it’s primary provider for equipment, which is an industry cooperative owning an i nventory of oil spill clean-up equipment. CGA is supported by the Marine Spill Resp onse Corporation’s (MSRC), which is responsible for storing, inspecting, maintaini ng and dispatching CGA’ s equipment. The MSRC STARS network provides for the closes t available personnel, as well as an MSRC supervisor to operate the equipment.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### 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 258 Facility Description Well Location Well No. SS002 (Location B) Location D

Distance to Nearest Shoreline (Miles) 38 miles 62 miles

Volume: Storage Tanks (total) Facility Piping (total) Lease Term Pipeline Uncontrolled Blowout (day) Barging

Potential 24 Hour Volume (bbls) 225,144 bbls 78,811 bbls

Type of Liquid Hydrocarbon Condensate Crude Oil API Gravity 28o 38.7o



### Since LLOG Exploration Offshore, L.L.C. (LL OG) has the capability to respond to the appropriate worst-case spill scenario include d in its regional OSRP approved on June 3, 2009, modified October 5, 2010, Novemb er 10, 2010, January 13, 2011, March 15, 2011, and modification received June 8, 2011, a nd certification letter accepted July 11, 2011. Additionally, a modification was submitted and received by BOEM on December 14, 2011 and May 30, 2012. Biennial update and revisions to OSRP were approved by BOEM on August 8, 2012. I hereby certify that LLOG has the capability to respond, to the maximum extent practi cable, to a worst-case discharge, or a substantial threat of such a discharge, re sulting from the activit ies proposed in this Supplemental EP. The WCD for the subjec t plan does not exceed the worst case discharge previously submitted for MC 547.

LLOG Exploration Offshore, L.L.C., Co mpany No. 02058, previously submitted the Regional OSRP Exploration WCD volume to be reviewed in Plan R-5139, Revised Exploration Plan submitted on March 2, 2011 and approved October 6, 2011.

The required proprietary data outlined in NTL 2010-N06 is being submitted to BOEM with the Confidential Copy of th is Initial Exploration Plan.

E. 

## Oil Spill Response Discussion

See the following Oil Spi ll 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 78,811 barrels of crud e oil with an API gravity of 38.7°.

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 BS EE Oil Spill Risk Analysis Model (OSRAM) for the Central and

Western Gulf of Mexico available on the BSEE website. The results are shown in Figure 1. The BSEE OSRAM identifies a 21% probabi lity of impact to the shorel ines of Plaquemines Parish, Louisiana 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, feedi ng and nursery habitat for numerous species of wildlife. Beaches in this area vary in grain part icle size and can be classified 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 practicable. A desc ription of the response eq uipment under contract

to contain and recover the Wors t 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 29% or approximately 22,855 barrels of crude oil would be evaporated/dispersed w ithin 24 hours, with approximately 55,956 barrels remaining.

Spill Response MC 258, Location D Barrels of Oil

WCD Volume 78,811

Less 29% natural evaporation/dispersion 22,855

Remaining volume 55,956

Daily dispersant capability 7,540

Oil addressed by in-situ burning 2,797



### Figure 2 outlines equipment, personnel, materials and support vessels as well as temporary storage equipment available to respond to a spill of approximately 55,956 barrels. The volume accounts for the amount remaining after evaporatio n/dispersion at 24 hours. The list estimates individual times needed for proc urement, load out, travel time to the site and deployment. Figure

2 also indicates how operations will be supported.

LLOG Exploration Offshore, L.L.C.’s Oil Spill Response Plan includes alternative response technologies such as dispersants and in-situ burn. Strategies will be decided by Unified

### Command based on the size of the spill, weather and potential impacts. If aerial dispersants are utilized, 8 sorties (9,600 gallons) from two of the DC-3 aircrafts and 4 sorties (8,000 gallons) from the Basler aircraft would provide a dail y dispersant capability of 7,540 barrels. 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 approximately 2,797 barrels of the total daily Worst Case Discharge volume could be burned. Slick containment boom would be immediately

called out and on-scene as soon as possible. Offshore response stra tegies may include attempting to skim utilizing CGA’s HOSS Barge and nine Fa st Response Units (FRUs), along with MSRC’s Louisiana Responder, Mississippi Responder, a nd Offshore Barge 452, with a total derated skimming capacity of 113,515 barrels. Temporary st orage associated with skimming equipment equals 58,700 barrels. If additiona l storage is needed, three 20,000 barrel storage barges may be mobilized and centrally located to provide temporary storage allowi ng the skimmers to stay in the area of operations as much as possible. Safety is first priority. Air monitoring will be accomplished and operations deemed safe prio r to any containment/skimming attempts.

If the spill went unabated, shoreline impact in 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 21,126 barrels. Temporary storage associated with skim ming equipment equals 725 barrels. If additional storage is needed, a 23,000 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. Onshore response may include the de ployment of shoreline bo om on beach areas, or protection and sorbent boom on vegetated areas. Master Service Agreements with AMPOL and OMI Environmental will ensure access to 147,00 0 feet of 18” shoreline protection boom. Figure

2 outlines individual times needed for procurem ent, load out, travel time to the site and deployment. Strategies would be based upon survei llance and real time traj ectories that depict areas of potential impact given actual sea and w eather conditions. The Stat e 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 co rrectly identified and prioritized to ensure optimal protection. Shorel ine protection strategies depict the protection response modes applicable for o il spill clean-up operati ons. The State of Louisiana Initial Oil Spill Response Plan provides detailed shoreline protection strategies for this area, and it describes necessary action to keep the oil spill from entering Louisiana’s coastal wetlands, based on the assumption that removal of the released oil will be much easier and less damaging to fragile coastal ecosystems if done in the open waters of the Gulf of Mexico. Supervisory personnel have the option to modify the deploym ent and operation of equipment allowing a more effective response to site-speci fic circumstances. LLOG Exploration Offshore, L.L.C.’s contract Spill Management Team holds a copy of the State of Louisiana Initial Oil Spill Response Plan.

Based on the anticipated worst case discharge sc enario, LLOG Exploration Offshore, L.L.C. can be onsite with contracted oil spill recovery equi pment with adequate response capacity to contain and recover surface hydrocarbons, and prevent land impact, to the maximum extent practicable, within an estimated 47 hours (based on the equi pment’s Effective Daily Recovery Capacity (EDRC)).

### Initial Response Considerations Actual actions taken during an oil spill response will be based on many factors which include but

are not 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 will be 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 will be deployed within two hours of Qu alified Individual (QI) notification, 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 Airborne Support Inc. (ASI) on standby

• With the Federal On-Scene Coordinator (FOSC), conduct analysis to determine appropriateness of dispersant application

• Gain FOSC approval for use of dispersants on the surface

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

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

• Confirm dispersant availability fo r current and long range operations

• Start ordering dispersa nt stocks required for expected operations

Containment boom

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

• Ensure boom handling and mooring equipment is deployed with boom

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

their most effective containment

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

Dedicated off-shore skimming systems

General

• Deployed to the highest concentration of oil

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

CGA HOSS Barge

• Use in areas with heaviest oil concentrations

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

CGA FRUs

• To the area of the thickest oil

• Use as far off-shore as allowed

• VOOs 140’ – 180’ in length

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

MSRC Oil Spill Response Vessels (OSRV)

• Use in areas with heaviest oil concentrations

• Use as far off-shore as allowed

MSRC Responders

• Use in areas with heaviest oil concentrations

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

### 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 State On-Scene Coordinator (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

• Place near shore assets on standby and depl oy in accordance with planning based on the actual situation, actual traj ectories 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

• Fast Response Vessels (FRV)

• Egmopol and Marco Shallow Water Skimmer (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 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

• Operate with aerial spotter directing systems to oil patches

### Shoreline Protection Operations

Response Planning Considerations

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

• Time to acquire personnel and eq uipment and their availability

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

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 tide 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 be consider ed and appropriate stoc ks 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 impacting a land segment have been projected utilizing LLOG Exploration Offshore, L.L.C. ’s WCD and information in the BSEE Oil Spill Risk Analysis Model (OSRAM) for th e Central and Western Gulf of Mexico available on the BSEE website using 30 day im pact. The results are tabulated below.

Area/Block OCS-G Launch

Area Land Segment and/or

Resource Conditional Probability (%) within 30 days

Exploratory Drilling

MC 258, Location D

62 miles from shore G24066 C57 Cameron, LA Vermilion, LA Terrebonne, LA Lafourche, LA Plaquemines, LA

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

Walton, FL

Bay, FL 1

1

2

2

21

3

1

1

1

1

1

1

1

1WCD Scenario– BASED ON WELL BLOWOUT DURING DRILLING OPERATIONS(62 miles from shore)55,956 bbls of crude oil (Volume considering natural weathering)API Gravity 38.7°FIGURE 2 – Equipment ResponseTime to MC 258, Location DDispersants/SurveillanceDispersant/SurveillanceDispersantCapacity (gal)StorageCapacityPersons Req.FromHrs toProcureHrs toLoadoutTravel tositeTotal HrsCGABasler 67T 2000 NA 2 Houma 1 1 0.8 2.8ASIDC 3 1200 NA 2 Houma 1 1 1.1 3.1DC 3 1200 NA 2 Houma 1 1 1.1 3.1Aero Commander NA NA 2 Houma 1 1 0.8 2.8Offshore ResponseOffshore Equipment No StagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsCGAHOSS Barge 43000 4000 3 Tugs 5 Harvey 7 0 5 10.6 1 23.6MSRCLouisiana ResponderTransrec 350 + OSRV2,640’ 44” Sea Sentry II Boom5,280’ 67” LAMOR10567 4000 NA 14 Fort Jackson 2 0 1 3.6 1 7.6MSRC 452 Offshore Barge1 Crucial Disk 88/301,980’ 44” Sea Sentry II Boom660 ‘ 67” LAMOR11122 45000 3 Tugs 6 Fort Jackson 2 0 2 12.9 1 17.9Mississippi ResponderTransrec 350 + OSRV5,280’ 44” Sea Sentry II Boom2,640’ 67” LAMOR10567 4000 NA 14 Pascagoula 2 0 1 4.4 1 8.4Recovered Oil Storage NoStagingEDRCStorageCapacity(bbl)VOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsEnterprise Marine Services LLC (available through contract with CGA)CTCo 2604 NA 20000 1 Tug 6 Amelia 4 12 4 25.63 1 46.63CTCo 2605 NA 20000 1 Tug 6 Amelia 4 12 4 25.63 1 46.63CTCo 2606 NA 20000 1 Tug 6 Amelia 4 12 4 25.63 1 46.63Staging Area: VeniceOffshore Equipment WithStagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toSiteHrs toDeployTotalHrsCGAFRU (1) + 100 bbl Tank (2) 4251 200 1 Utility 6 Galveston 1 2 8 7.1 1 19.1FRU (1) + 100 bbl Tank (1) 4251 100 1 Utility 6 Harvey 1 2 1.75 7.1 1 12.8FRU (1) + 100 bbl Tank (2) 4251 200 1 Utility 6 Ingleside 1 2 11 7.1 1 22.1FRU (1) + 100 bbl Tank (2) 4251 200 1 Utility 6 Lake Charles 1 2 5.5 7.1 1 16.6FRU (2) + 100 bbl Tank (2) 8502 400 2 Utility 12 Leeville 1 2 3.5 7.1 1 14.6FRU (1) + 100 bbl Tank (2) 4251 200 1 Utility 6 Morgan City 1 2 3.25 7.1 1 14.3FRU (2) + 100 bbl Tank (4) 8502 400 2 Utility 12 Venice 1 2 0 7.1 1 11.1Offshore Equipment WithStagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toSiteHrs toDeployTotalHrsCGA42” Auto Boom (5000’) NA NA 10 Crew 20 Galveston 1 2 8 7.1 1 19.142” Auto Boom (10000’) NA NA 20 Crew 40 Harvey 1 2 1.75 7.1 1 12.842” Auto Boom (2500’) NA NA 6 Crew 12 Ingleside 1 2 11 7.1 1 22.142” Auto Boom (5000’) NA NA 10 Crew 20 Lake Charles 1 2 5.5 7.1 1 16.642” Auto Boom (2500’) NA NA 6 Crew 12 Pascagoula 1 2 4 7.1 1 15.1Hydro-Fire Boom NA NA 8 Utility40 Harvey 1 4 1.75 7.1 6 19.8Nearshore ResponseNearshore Equipment NoStagingEDRCStorageCapacityVOOPersonsRequiredFromHrs toProcureHrs toLoadoutHrs toGOMTravel toSpill SiteHrs toDeployTotalHrsCGA46’ FRV 5000 65 NA 4 Leeville 1 0 2 2 0 546’ FRV 5000 65 NA 4 Venice 1 0 1 2 0 4Trinity SWS 21500 249 NA 4 Venice 1 2 2 2 0 7Enterprise Marine Services LLC (available through contract with CGA)CTCo 2607 NA 23000 1 Tug 6 Amelia 4 12 4 15 1 36Staging Area: VeniceNearshore and InlandSkimmers With StagingEDRCStorageCapacityVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotal HrsCGASWS Egmopol 3000 100 NA 3 Galveston 1 2 8 2 0 13SWS Egmopol 3000 100 NA 3 Morgan City 1 2 3.25 2 0 8.25SWS Marco 3588 20 NA 3 Lake Charles 1 2 5.5 2 0 10.5SWS Marco 3588 34 NA 3 Leeville 1 2 3.5 2 0 8.5SWS Marco 3588 34 NA 3 Venice 1 2 0 2 0 5Rope Mop 77 2 0 3 Harvey 1 2 8 2 0 13Foilex Skim Package 891 45 NA 3 Lake Charles 1 2 5.5 2 0 8Foilex Skim Package 891 45 NA 3 Galveston 1 2 8 2 0 8Foilex Skim Package 891 45 NA 3 Harvey 1 2 1.75 2 0 114 Drum Skimmer 686 100 1 Crew 3 Lake Charles 1 2 5.5 2 0 84 Drum Skimmer 686 100 1 Crew 3 Harvey 1 2 1.75 2 0 112 Drum Skimmer 240 100 1 Crew 3 Lake Charles 1 2 5.5 2 0 8Shoreline 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 14OMI Environmental (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 BoomVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotal HrsCGABeach Boom (2000’) NA 6 Galveston 1 2 8 1 2 14Beach Boom (1000’) NA 4 Ingleside 1 2 11 1 2 17Beach Boom (2000’) NA 6 Pascagoula 1 2 4 1 2 10Wildlife ResponseVOOPersonsReq.FromHrs toProcureHrs toLoadoutTravel toStagingTravel toDeploymentHrs toDeployTotal HrsCGAWildlife Support Trailer NA 2 Houma 1 2 3 1 2 9Bird Scare Guns (24) NA 2 Belle Chasse 1 2 1.5 1 2 7.5Bird Scare Guns (12) NA 2 Galveston 1 2 8 1 2 14Bird Scare Guns (24) NA 2 Houma 1 2 3 1 2 9Bird Scare Guns (12) NA 2 Ingleside 1 2 11 1 2 17Bird Scare Guns (24) NA 2 Lake Charles 1 2 5.5 1 2 11.5Bird Scare Guns (24) NA 2 Pascagoula 1 2 4 1 2 10Response AssetTotalOffshore EDRC 113,515Offshore Recovered Oil Storage 118,700Nearshore / Shallow Water EDRC 21,126Nearshore / Shallow Water Recovered Oil Storage 23,725Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX I

ENVIRONMENTAL MONITORING INFORMATION (30 CFR PART 250.221 AND 250.252)

A. Monitoring Systems

LLOG subscribes to Impact Weather Serv ice which provides access to real-time weather conditions, and provi des periodic updates on impending inclement weather conditions such as tropical depressions, storms and/or hur ricanes entering the Gulf of

Mexico.

LLOG also relies on the National Weather Service to support the aforementioned subscribed service. During impending in clement weather conditions, LLOG closely coordinates the activity with our contractors and field personne l to ensure the safety of people for evacuation; measures to prepar e the facility for ev acuation to ensure protection of the environment and the facility/equipment.

Mississippi Canyon Block 258 is in water de pths greater than 400 meters (1,312’); therefore LLOG will follow the guidelines of the applicable NTL 2009-G02 “Ocean Current Monitoring”, by monitoring and gath ering ocean current da ta using Acoustic Doppler Current Profile (ADCP) while the MODU is on location.



## B. Incidental Takes

LLOG does not anticipate the incidental taki ng of any species as a result of the proposed activities based on the implementation of, and adherence to, the BSEE NTL

No. 2012-G01 “Marine Trash and Debris Awa reness Training and Elimination” and

Joint NTL No. 2012-G01 “Vessel Strike Avoida nce and Injured/Dead Protected Species Reporting”.



## C. Flower Garden Banks National Marine Sanctuary

This section of the plan is not a pplicable to the proposed operations.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX J

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

A. Lease Stipulations

Minerals Management Service (BOEM) invoke d Stipulation No. 6 – “Marine Protected Species” on Lease OCS-G-24066, Mississippi Canyon Block 258.

Lease Stipulation No. 6 is to reference meas ures to minimize or avoid potential adverse impacts to protected species (sea turtle s, marine mammals, gulf sturgeon, and other federally protected species). BOEM has issued Notice to Lessees Joint NTL No. 2012- G02 “Implementation of Seismic Survey Mi tigation Measures and Protected Species Observer Program”, Joint NTL No. 2012- G01 “Vessel Strike Avoidance and Injured/Dead Protected Species Reportin g” and BSEE NTL No. 2012-G01 “Marine

Trash and Debris Awareness and Elimination”.



## B. Special Conditions

• Subsea Completions

LLOG may potentially comple te the proposed wells as subsea completions. Therefore, LLOG will follow the regul ations in Title 30 CFR Parts 550.296 through 550.299, which mandates the submittal and approval of separate regulatory filings entitled a “Conservation Information Document” and Title 30

CFR Parts 250.286 to Title 30 CFR Parts 250.295 entitled “Deepwater Operations Plan”.

• Ocean Current Monitoring

The proposed operations under this Plan ar e in water depths greater than 400 meters (1,312’); therefore, LLOG will fo llow the guidelines of the applicable NTL 2009-G02 “Ocean Current Monitoring”, by continuously monitoring and gathering ocean current data using Ac oustic Doppler Current Profile (ADCP)

while the MODU is on location.

• Breton Sound Area

Mississippi Canyon Block 258 is located within the 200 km zone of the Breton National Wildlife Refuge, and LLOG will consider the use of best available control technology as required if the proj ected air emissions are determined to significantly affect the air quality of an onshore area.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## 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 implementation of, and adherence to, the BSEE NTL

No. 2012-G01 “Marine Trash and Debris Awa reness Training and Elimination”; Joint

NTL No. 2012-G01 “Vessel Strike Avoidanc e and Injured/Dead Protected Species Reporting”; and Joint NTL No. 2012-G02 “I mplementation of Seismic Survey Mitigation Measures and Protected Species Observer Program”.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX L

RELATED FACILITIES AND OPERATIONS INFORMATION (30 CFR PART 250.256)

A. 

## Produced Liquid Hydrocar bon Transportation Vessels

Not applicable to proposed operations.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX M

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

A. General

Personnel involved in the proposed operations will typically use their own vehicles as transportation to and from the selected ons hore 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 frequenc ies shown, taking the most direct route feasible as mandated by weather and traffic conditions:

DP Semisubmersible Rig:

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

Duration Supply Boats 500 bbls 1 Six times weekly Crew Boats 500 bbls 1 Three times weekly

Aircraft 1900 lbs 1 As Needed



### Semisubmersible Rig:

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

Duration Tug Boats 3000 bbls 1 During rig moves on/off Supply Boats 500 bbls 1 Six times weekly Crew Boats 500 bbls 1 Three times weekly

Aircraft 1900 lbs 1 As Needed



## 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.



## E. Vicinity Map

Vicinity Plat showing the location of Mississippi Canyon Block 258 relative to the

nearest shoreline and ons hore base is included as Attachment M.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Vicinity Map

Attachment M (Public Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## APPENDIX N

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

A. 

## General

The proposed surface disturbances in Miss issippi Canyon Block 258 will be located approximately 62 miles from the nearest Louisiana shoreline, and approximately 130 miles from the 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 equipm ent supporting the offshore operations.

● Dispatching personnel and equipment, a nd does not anticipate the need for any expansion of the selected facilities as a result of the activities proposed in this

Initial 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 re quire any immediate action to acquire additional land or expand existing base facilities.

C. 

## Support Base Construction or Expansion Timetable

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

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 Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

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

A. Consistency Certification

. A certificate of Coastal Zone Management Co nsistency for the States of Louisiana and

Alabama are enclosed as Attachment N



## B. Other Information

Included as Attachment O are the enforceable policies from the State of 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.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Coastal Zone Management Consistency Statement for the

States of Louisiana and Alabama

Attachment N (Public Information)Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

# Coastal Zone Management Enforceable Policies for the

State of Alabama

Attachment O (Public Information)

## ALABAMA COASTAL ZONE MANAGEMENT

CONSISTENCY CERTIFICATION

INITIAL EXPLORATION PLAN

MISSISSIPPI CANYON 258

OCS-G-24066

The OCS related oil and gas development activities having potential impact on the Alabama Coastal Zone are based on the location of the pr oposed facilities, access to those sites, best practical techniques for operati ons and production equipment, guidelines for the prevention

of adverse environmental eff ects, effective environmental protection, emergency plans and contingency plans. Alabama policies have been addressed below or ar e cross referenced to the appropriate sections of the Plan:

Topic Cross

Reference Comments

Coastal Resource Use Policies Coastal Development Dock and port facilities in Louisiana will be used. There will be no new construction, dredging or filling in

Alabama state waters. There will be no new commercial development or capital improvements in Alabama’s coastal zone, nor will there be any employment effects. Mineral Resource Exploration

and Extraction Proposed development operations will take place 90

statute miles from Alabama’s coastline Commercial Fishing Appendix H Hazard Management Appendix C A Shallow Haza rds Report was previously submitted to BOEM in order to identify and assess the seafloor and shallow geologic conditions in this block Shoreline Erosion Appendix H Proposed deve lopment operations will take place 90

statute miles from Alabama’s coastline Recreation Appendix H Transportation Appendix B

Natural Resource Protection

Policies Biological Productivity Appendix H Water Quality Appendix H Water Resources Appendix H Air Quality Appendix G Wetlands and Submerged

Grassbeds Appendix H

Beach and Dune Protection Appendix H Wildlife Habitat Protection Appendix H Endangered Species Appendix H Cultural Resources Protection Appendix D Mississippi Canyon Block 258 has been determined to have a high potential for containing archaeological properties. An archaeological report was submitted to BOEM under separate cover.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## 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 identify the affected environments that could be impacted by these IPF’s. An “x” has been marked for each IPF category that LLOG has determined may impact a particular environment as a resu lt of the proposed

activities. For those cells which are foot noted, a statement is provided as to the applicability of the proposed activities, and where there may be an effect, an analysis 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) Other IPF’s you Identify

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 Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### Footnotes for Environmental Impact Analysis Matrix:

1. Activities that may affect a marine sanctuary or topographi c 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 zo ne) with relief greater than 2 meters that is not protected by the Topographic Stipul ation attached to an OCS lease.

2. Activities with any bottom disturbance within an OCS lease block protected through the Live Bottom (Pinnacle Trend) Stipulation attached to an OCS lease.

3. Activities within any Eastern Gulf OCS block where seafloor habitats are protected by the Live Bottom (LowRelief) 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 concentr ations greater than 500 ppm might be encountered.

6. All activities that could result in an accidental spill of produced liquid hydro carbons or diesel fuel that you determine would impact these environmen tal resources. If the proposed acti on is located a sufficient distance from a resource that no impact would occur, the EIA can note that in a sentence or two.

7. All activities that involve seafloor disturbances, including anchor emplacements, in any OCS block designated by the BOEMRE as having high-probability for the occu rrence of shipwrecks or prehistoric sites, including

such blocks that will be affected th at are adjacent to the lease block in which your planned activity will occur. If the proposed activities are located a sufficient distance fr om 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 trans portation of produced fluids to shor e using shuttle tankers or barges.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## B. Impact Analysis

LLOG does not anticipate any unforeseen inci dents from the proposed activities which could significantly impact the associated envi ronment. LLOG activities associated with this Exploration Plan (Plan) will be perf ormed with prudent and industry accepted standards, and in compliance with the fe deral agency regulations and oversight.

The “Oil Spills Information” Section of this Plan details the potential worse case discharge volume which has been calculated based on the new Bureau of Ocean Energy Management, Regulation and Enforcemen t (BOEMRE) Notice to Lessees (NTL 2010- N06). Response 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 po tential spill incident. Additional measures implemented by LLOG is trajectory analyses to be obtained prior to and during the proposed activities, contract ual arrangements with we ll control specialists and preliminary reviews of potential well interv ention scenarios, and to supplement existing contracted response/clean-up equipment w ith equipment offered by Helix which specializes in subsea deepwater well in tervention, containm ent 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 distur bances within Mississippi Canyon Block 258 are located a significant distance (> 100 m iles) from the closest designated topographic feature (Sackett Bank).

The crests of these designated topogra phic 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. Subs urface spills could ca use 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 Response Plan and active source control and countermeasures to minimize these potential impacts.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### • 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 distur bances within Mississippi Canyon Block 258 are located a significant distance (> 100 miles) from the closest pinnacle trend live bottom stipulated block. The crests of these pinnacle trend areas are much deeper than 20 m.

During the surface location disturbance review, LLOG reviews potential surface impacts, and would be able to identify any pinnacles within the vicinity and would avoid placement of any surface dist urbances 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 minimize these potential impacts.

• Eastern Gulf Live Bottoms

There are no anticipated emissions, efflue nts, emissions physical disturbances to the seafloor, wastes sent to shore, and/ or accidents from the proposed activities that could cause impacts to Eastern Gulf live bottoms.

The proposed surface disturbance with in Mississippi Canyon Block 258 is located a significant distance (> 100 mile s) from the closest Eastern Gulf live bottoms stipulated block. During the surface location disturbance review, LLOG previews potential surface impacts, and would be able to identify any live bottom areas within the vicinity a nd would avoid placeme nt of any surface

disturbances such as a drilli ng 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 minimize these potential impacts.

• Chemosynthetic Communities

Water depth at the surface location in Mississippi Canyon Block 258 ranges from 5,447 to 6,686 feet including anchor radius. As noted in the shallow hazards assessment (Attachment I) it is unlikely that the identified anomalies represent the presence of high-dens ity chemosynthetic or other benthic

communities.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### • Water Quality

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

Associated overboard effluents are re gulated by the EPA Region VI NPDES General Permit GMG290000 which mandates volume discharge rate limitations, certain testing requirements for toxicity and oil and grease limitations. As such, it is not anticipated these discharg es authorized under the approved EPA NPDES permit will cause significant adverse impacts to water quality.

Certain wastes generated from the propos ed activities will be manifested and sent to shore for treatment and/or dispos al 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 vici nity could potentia lly cause temporary impacts to water quality. In the event of such a release, the water quality would be temporarily affected by the dissolv ed components and small droplets. Currents and microbial degradation would remove the oil from the water column

or dilute the constituen ts 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures to minimize these potential impacts.

• Fisheries

Accidental oil spill releases from the proposed activities, and cumulative similar discharge activity within the vicinity may potentially cause some detrimental effects on fisheries. It is unlikely a spill would occur; however, such a release in open waters closed to mobile adult finfis h or shellfish would likely be sub-lethal and the extent of damage would be redu ced to the capability of adult fish and shellfish to avoid a spill, to meta bolize hydrocarbons, and to excrete 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 Re gional Oil Spill Response Plan andMississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### activate source control and countermeas ures to minimize these potential impacts.

• Marine Mammals

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

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

Chronic and sporadic sub-le thal effects 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 oi l spill, chance collisions with service vessels and ingestion of plastic material.

The net results of any dist urbance would depend on the size and percentage of the population affected, ecological im portance of the disturbed area, environmental and biological parameters th at influence an animal’s sensitivity to disturbance and stress, and the accom modation time in response to prolonged disturbance (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 ve ssels and cetaceans w ithin 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 contractors under the additional criteria addressed in BSEE

NTL No. 2012-G01 “Marine Trash a nd Debris Awareness Training and

Elimination” and Joint NTL No. 2012- G01 “Vessel Strike Avoidance and Injured/Dead Protected Species Reporting”. The proposed operations will be conducted in accordance with the regulations via manifesting waste sent to shore and ensuring such wastes are contained to prevent loss. Informational placards will be maintained on the facility, a nd LLOG and the associated contractors obtain training on at least an annual basis to ensure pe rsonnel 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 certain limitations, prohibitions and recordkeeping requirements. AsMississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### such, it is not anticipated these discharges authorized under the approved EPA NPDES permit will not cause significan t 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures to minimize these potential impacts.

• Sea Turtles

Small numbers of turtles could be killed or injured by chance collision with service vessels or by eating indigestib le trash, particularly plastic items accidentally lost from drilling rigs, produc tion facilities a nd service vessels. Drilling rigs and project vessels pr oduce noise that could disrupt normal behavior patterns and create some stre ss to sea turtles, making them more susceptible to disease. A ccidental oil spill releases are potential threats which

could have lethal effects on turtles. Contact and/or consumption of this released material could seriously affect individual sea turtles. Most OCS related impacts on sea turtles are expected to be sub- lethal. Chronic a nd/or avoidance of

affected areas could cause declines in survival or produ ctivity, resulting 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 certain limitations, prohibitions and recordkeeping requirements. As such, it is not anticipated these discharges authorized under the approved EPA NPDES permit will not cause significan t adverse impacts to water quality.

Additionally, LLOG and its contractors will conduct the proposed activities

under the additional criteria addres sed by BSEE NTL No. 2012-G01 “Marine Trash and Debris Awareness Training and Elimination” and Joint NTL No.

2012-G01 “Vessel Strike Avoidance a nd Injured/Dead Protected Species Reporting”. The proposed ope rations will be conducted in accordance with the regulations via manifesting waste sent to shore and ensuring such wastes are contained to prevent loss. Informationa l placards will be maintained on the facility, and LLOG and the associated c ontractors obtain trai ning on at least an annual basis to ensure personnel are aware of the reporting and operational 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures to minimize these potential impacts.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### • Air Quality

The proposed activities are located a pproximately 62 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 th e seafloor which could impact known or potential shipwreck sites, as the review of high resolution shallow hazards data indicate there are no known or potentia l 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 th e seafloor which coul d cause impacts to prehistoric archaeological sites, as the review of high resolution shallow hazards data and supporting studies did not re flect 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, e ssential fish habita t may be adversely impacted by effluents 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 spill release would occur; however, if a spill were to occur in close proximity to finfish or shellfish, the effects 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, to metabolize hydrocarbons and to excrete 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures to minimize these potential impacts.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### • Marine and Pelagic Birds

As a result of the proposed activities, ma rine 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 industry wi de standards for using proven equipment and technology for such responses. In that event, LLOG will implement the Regional Oil Spill Response Plan and activate source control and countermeasures to minimize 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 requested BOEM RE 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 62 miles), and the response capabilities that would be implemented, no significant adverse impacts are expected. Both hi storical spill data and the combined trajectory/risk calculations referenced in the publication of OCS EIA/EA

BOEMRE 2002-052 indicate there is little ri sk of contact 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures 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 62 miles) and the response capabilities that would be implemented, no significant adverse impacts are expected. Both hi storical spill data and the combinedMississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### trajectory/risk calculations referenced in the publication of OCS EIA/EA

BOEMRE 2002-052 indicate there is little ri sk of contact 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures 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 62 miles) and the response capabilities that would be implemented, no significant a dverse 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 th ere is little risk of contact or impact to the coastline and asso ciated 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures to minimize these potential impacts.

• Coastal Wildlife Refuges

As a result of the propose d activities, coastal wildlife refuges may be adversely impacted by an accidental oil spill. Ho wever, due to the distance from shore (approximately 62 miles) and the re sponse capabilities that would be implemented, no significant a dverse 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 th ere is little risk of contact or impact to the coastline and asso ciated 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures 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. Ho wever, due to the distance from shoreMississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

### (approximately 62 miles) and the re sponse capabilities that would be implemented, no significant a dverse 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 th ere is little risk of contact or impact to the coastline and asso ciated 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 Re gional Oil Spill Response Plan and

activate source control and countermeas ures to minimize these potential impacts.

Other Resources Identified

LLOG has not identified any other environmen tal resources other than those addressed

above.



## C. Impacts of Proposed Activities

LLOG does not anticipate any impacts on th e offshore site specifi c locations, offshore vicinity, and/or coastal and onshore envir onmental conditions based on the potential impacts identified in the EIA worksheets and hi storical operations in the exploration of

this reservoir.



## D. Environmental Hazards

The Gulf of Mexico may experience se veral hurricanes throughout the season which typically runs from June through November. A severe hurricane may impact the activities covered in this Plan. Such imp acts may be damage to the drilling rig, the unanticipated release of hydrocarbons dependi ng upon the current status of the well. Additionally, the surface lo cated in Mississippi Canyon Bl ock 258 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 Penins ula, moves northward into the Gulf of Mexico, then loops east and s outh 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 re quirements of NTL’s 2008-G09 and 2009-G10.



## E. Alternatives

LLOG did not consider any alternatives to reduce environmental im pacts as a result of the proposed activities.Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## F. Mitigation Measures

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



## G. Consultation

LLOG has not contacted any agencies or pe rsons for consultation regarding potential impacts associated with the pr oposed activities. Therefore, a list of such entities is not being provided.



## H. Preparers

Questions or requests for addi tional information should be made to LLOG’s authorized representative of this Plan:

Kathy Gowland Regulatory Specialist 1001 Ochsner Boulevard, Suite 200 Covington, Louisiana 70433 985-801-4300 (Phone) kathygo@llog.com



## I. References

The following documents were utilized in preparing the Environmental Impact

Assessment:

Document Author Dated

Shallow Hazards Assessment, Benthic Communities Evaluation and Archaeological Resource Survey Archaeological Deep Tow Survey Berger Geosciences, LLC

Tesla Offshore 2012

2012 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 Venting Regulations” NTL 2011-N02 “Flaring and Ve nting Approval Contact

Information” Bureau of Ocean Energy Management, Regulation, and Enforcement 2006

2011

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

JOINT NTL 2012-G02 “Implementation of seismic Survey Mitigation Measures and Protected Species Observer Program” Bureau of Ocean Energy Management, Regulation, and Enforcement 2012

BSEE NTL 2012-G01 “Marine Trash & Debris Awareness

& Elimination” Bureau of Ocean Energy Management, Regulation, and Enforcement 2012Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 JOINT NTL 2012-G01 “Vessel Strike Avoidance and Injured/Dead Protective Species” Bureau of Ocean Energy Management, Regulation, and Enforcement 2012

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 BOEM 2011-G01 “D rilling Windows, Eastern Gulf of

Mexico” Bureau of Ocean Energy Management, Regulation, and Enforcement 2011

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 GMG 290000 EPA – Region VI 2007 Regional Oil Spill Response Plan LLOG Exploration Offshor e, L.L.C. 2010Mississippi Canyon Bl ock 258 (OCS-G 24066) Initial Exploration Plan 09/10/2012 

## 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 Assessment, Benthic Communities Evaluation and Archaeological Resource Survey Archaeological Deep Tow Survey Berger Geosciences, LLC

Tesla Offshore 2012

2012 BOEMRE Environmental Impact Statement Report – No.

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

Regional Oil Spill Response Plan LLOG Exploration Offshor e, L.L.C. 2010