UNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR, PESTICIDES & TOXICS MANAGEMENT DIVISION

61 Forsyth St., S. W. Atlanta, Georgia 30303

FACT SHEET

- Updated June 26, 2013

ACTION: Preliminary Determination and Draft Revised Outer Continental Shelf (OCS) Air Permit

, OCS

- EPA

- R400 8

- M2 , for BHP Billiton Petroleum, Inc. (BHPB)

, Sake Prospect Project

Public Notice & May 24 , 201 3 : Publication in the Panama City News Herald, Mobile Press

Comment Period: Register, Pensacola News Journal

, Florida Register

, email s to the OCS public notice list, www.regulations.gov , and the EPA Region 4’s website at: http://www.epa.gov/region4/air/permits/ocspermits/ocspermits.html

June 27 , 201 3 : Close of Public Comment Period

Public H earing : June 27, 2013, from 3:00 pm

– 7: 00 pm at:

West Florida Public Library 239 N. Spring St. Pensacola, Florida 32502

Project: The permitted project, which has not yet begun drilling, will use one of two deepwater exploratory drilling vessels and associated support fleet that BHPB proposes to operate within contiguous DeSoto Canyon OCS lease blocks in the

Gulf of Mexico. BHPB has requested the permit be amended to include

revised best available control technology (BACT) limits for eight (8) engines

on the Development Driller 1 ( DD1 ) exploratory drilling vessel based on recent source test data that was not available at the time of permitting. The permit revision does not constitute a modification to the emission units or operation of the facility , nor waive any applicable air quality standards or requirements

.

This project is considered a temporary major source under the applicable

Prevention of Significant Deterioration regulations 40 CFR part 52.21 and is subject to the title V program at 40 CFR part 71.

Project Location: The project is located on the OCS in the Gulf of Mexico within lease blocks 499, 543

- 545, 586

- 592, 631

- 640, 676

- 685, 721

- 729, 768

- 773, and 815

- 817

. The se contiguous leas e blocks are located approximately within latitude 28.15° to 28.50° N and longitude 86.68° to 87.27° W

. The center of the contiguous lease block area is located at 28.31° N and longitude 86.96° W, approximately

120 miles southeast of the nearest Louisiana shoreline, 139 miles south southeast of the nearest Mississippi shoreline, and 125 miles south of the

nearest Alabama and Florida shorelines

. It is located beyond the area

r estricted by the Gulf of Mexico Energy Security Act Moratoria, which extends appro ximately 100

- 125 miles off the coast of Florida

.Authority: EPA is the agency responsible for implementing and enforcing Clean Air Act (CAA) requirements for OCS sou rces in the Gulf of Mexico east of longitude

87.5° W. The Department of Interior , Bureau of Ocean Energy Management,

is the lead a gency for leasing and drilling approvals, as well as implementation

of the Clean Air Act west of 87.5 ° longitude

.

Emissions: The maximum potential ann ual emissions in tons per year for each operating

scenario drill ship and support vessel s are summarized in the fo llowing table:

Potential to Emit for Regulated NSR Pollutants

Pollutant C.R. Luigs

Potential to Emit, Tons per Year DD1

Potential to Emit, Tons per Year Significant

Emission Rate, Tons per year PSD Review

Required?

PM 66.02 77.28 25 Yes

PM 10 41.15 72.44 15 Yes

PM 2.5 40.16 72.26 10 Yes

NO X 1 1

, 699.60 1

, 30 9

. 61 40 Yes

SO 2 1 0.91 0.88 40 No

H 2 SO 4 0.03 0.03 7 No

CO 373.69 3 10

. 64 100 Yes

VOC 1 81.61 110.48 40 Yes

GHGs (CO 2 e) 101,574.72 111,088.86 75,000 (subject to regulation threshold) Yes

Lead 0.02 0.02 0.60 No

1 NO X and VOC are the measured precurs ors for the criteria pollutant o zone. NO X & SO 2 are precursors for PM 2.5

.

Proposed Changes : The BACT emission limits for PM/PM 10 /PM 2.5 , VOC, and GHGs for the main engines of the DD1 are proposed to be revised. The respective control technology determinations for these engines are not being revised; however, high

- pressure fuel injection/high

- efficiency fuel injection, which has already

been deemed t o be BACT for other pollutants, is now being included as

BACT for CO 2 e emissions. Public comments are being accepted for these proposed changes only.

Additional Information: The draft permit and preliminary determination document that explains the change s to the permit conditions are available on EPA Region 4’s website at : http://www.epa.gov/region4/air/permits/ocspermits/ocspermits.html

EPA Contact: For quest ions or comments on the draft permit and public hearing contact:

Art Hofmeister EPA Region 4, APTMD 61 Forsyth Street, SW Atlanta, GA 30303 ( 404 ) 562

- 91 15

Fax: (404) 562

- 9066

Email: hofmeister.art@epa.gov