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## ***PUBLIC NOTICE COPY***

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 4 Atlanta, Georgia

Permit to Construct and Operate Under the

Outer Continental Shelf Air Regulations

Permit No . OCS

- EPA

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In accordance with the provisions of s ection 328 of the Clean Air Act (CAA), 42 U.S.C. § 7627 and the implementing Outer Continental Shelf (OCS) Air Regulations at t itle 40 Code of Federal Regulation s (CFR) part 55, which incorporate by reference the Prevention of Significant Deterioration (PSD) of Air Quality Regulations at 40 CFR § 52.21, and the title V Operating Permit Program at 40 CFR part 71

,

BHP Billiton Petroleum, Inc. 1360 Post Oak Blvd., Suite 150
Houston, Texas 770 56

is hereby authorized to construct and operate air emissions units and to conduct other air pollutant emitting activities at an OCS source at multiple sites within the Gulf of Mexico, DeSoto Canyon lease blocks 499, 543

- 545, 586

- 592, 631

- 640, 676

- 685, 721

- 729, 768

- 773, and 815

- 817 . The center of the contiguous lease blocks is located on OCS waters of the Gulf of Mexico e ast of longitude 87.5 o W at

latitude 28.31 o N and longitude 86.96 o W

, approximately 1 2 0 miles from nearest Louisiana shoreli ne, 139 miles from the nearest Mississippi shoreline, and 125 miles from the nearest Alabama and Florida

shorelines

.

Upon initial start

- up, this OCS source and support vessels shall be constructed and operated in

accordance with the terms and conditions set forth in this permit.

This p ermit originally bec a me effective on June 30, 2012

. The permit was modified on March 13, 2013

, and [ INSERT EFFECTIVE DATE]

.

This permit shall expire two years from the date the OCS source c ommences activity on the identified DeSoto Canyon lease blocks, not to exceed June 30, 2017

.

This permit shall not relieve the owner or operator of the responsi bility to comply fully with all applicable provisions of federal and state law.

__________ ______________________ Date Signed Beverly H. Banister

Director Air, Pesticides, and Toxics Management Division2

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- M 2 0 5 / 23 /2013 1 AUTHORITY

The United States Environmental Protection Agency (EPA) issues this permit pursuant to section 328 of the CAA, 42 U.S.C. § 7627, and the imple menting OCS Air Regulations at 40 CFR part 55, which incorporate by reference the PSD Regulations at 40 CFR § 52.21 and the title V Operating Permit Program at 40 CFR part 71. This permit is based upon application materials submitted to EPA by

BHP Billiton Petroleum, Inc. (BHPB)

, dated October 14 , 2010, February 9, 2011, September 30, 2011, October 14, 2011, December 21, 2011, January 18, 2012

, supplemental submittals in the administrative record for this permit action, and upon the technical analysis perfo rmed by EPA.

2 APPLICANT

BHP Billiton Petroleum, Inc. 1360 Post Oak Blvd., Suite 150 Houston, Texas 77056

3 PROJECT LOCATION

BHP B ’s project is located in the OCS waters of the Gulf of Mexico, DeSoto Canyon area, within lease
blocks 499, 543

- 545, 586

- 592, 631

- 640, 676

- 685, 721

- 729, 768

- 773, and 815

- 817. These contiguous lease blocks are found approximately within latitude 28.15° to 28.50° N and longitude 86.68° to

87.27° W, east of longitude 87.5° W. The center of the lease block area is located at 28.31° N and longitude 86.96° W, approximately 120 miles from the nearest Louisiana shoreline, 139 miles from the nearest Mississippi shoreline, and 125 miles from the nearest Alabama and Florida shorelines.

4 PROJECT DESCRIPTION

BH P B’s project, known as the Sake P rospect Drilling Project (Sake Project)

, is an oil and natural gas explor ation drilling campaign for a period of up to two years using a mobile offshore drilling unit (MODU) and associated support vessels described in this section. BH P B will use either the Transocean

ultra

- deepwater drillship C.R. Luigs MODU (Operating Scenario 1) or the Transocean semisubmersible Development Driller 1 ( DD1 ) MODU (Operating Scenario 2) . Under either o perating s cenario, BHPB

will conduct drilling activities in multiple locations within the DeSoto Canyon lease block locations

listed in Section 3 , Project Location, of this permit

. This permit does not authorize the establishment of any permanent production facilities.

Air pollutant emissions generated from the Sake Project include carbon monoxide (CO), nitrogen dioxide (NO 2 ) ; particulate matter (PM) which includes PM with an aerodynamic diameter less than 10 microns (PM 10 ) and with an aerodynamic diameter less than 2.5 microns (PM 2.5 ) ; and sulfur dioxide (SO 2 ) (known as criteria pollutants), as well as other regulated air pollutants, including oxides of nitrogen (NO X ), volatile organic compounds (VOC), and greenhouse gases (GHGs). VOC and NO X are the measured precursors for the criteria pollutant ozone, and NO X and SO 2 are measured precursors for the criteria pollutant PM 2.5

. Based on emissions estimates and applicable permitting thresholds, both operating scenarios are subject to the PSD and title V programs and have significant emissions of NO X , CO, PM 10 , PM 2.5 , VOC, and GHG s . The project emissions of VOC and NO X are measured precursors for the criteria pollutant ozone and NO X is a measured precursor for PM 2.5

. In addition, both the3

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- M 2 0 5 / 23 /2013 C.R. Luigs and DD1 MODUs are area sources of h azardous air pollutants pursuant to 40 CFR 63 subpart

ZZZZ.

The C.R. Luigs emission units consist of eight main power plant diesel engines to provide power and propulsion, four crane diesel engines, one emergency diesel generator, and a black start compressor diesel engine. The cementing operations use two cementing unit diesel engines and a portable cementing nitrogen pump diesel engine. The wireline operations are intermittent and use up to four small portable diesel engines. The four life boats and the one fast rescue craft are powered by diesel engines. In

addition

, there is one mud degassing unit and two dust collectors for mud and cement. There are 29 tanks to store diesel fuel, one tank for hydraulic oil, one tank for base oil, and two tanks to store Jet A

helifuel. A list of all e mission units is in Table 1.

The DD1 emission units consist of eight main power plant generator diesel engines to provide power and propulsion and one emergency diesel generator. The cementing operations use two cementing unit diesel engines, a batch mixe r diesel engine, and a portable cementing nitrogen pump engine. The wireline operations are intermittent and use up to four small portable diesel engines. The four life boats and the one fast rescue craft are powered by diesel engines. In addition

, there is one mud degassing unit and two dust collectors for mud and cement. There are 21 tanks to store diesel fuel, one base oil tank,

and four tanks to store Jet A helifuel. Also present onboard are emission units associated with such

emission

- emitting activit ies as flaring, painting, welding and seismic operations. A list of all emission

units is in Table 2.

Support vessels operating within 25 miles of either operating scenario will include offshore supply, work boats, and crew boats that run marine diesel engines.

THIS SPACE INTENTIONALLY BLANK4

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- M 2 0 5 / 23 /2013 The information provided in Tables 1

- 3 is for description and identification purposes and does not establish operating limits.

Table 1

– C.R

. Luigs Emissions Units (Operating Scenario 1)

Emissions

Unit ID Engine Description Manufacturer Model Rating a ( h p ) * Mfg

Year

EU

- 001 L

- 008 L Main Power Plant Diesel Engines 1

- 8 MAN B&W 9L32/40

- 47 5,875 1998

EU

- 009 L Port Fwd Crane Diesel Engine Caterpillar 3406 305 1998

EU

- 010 L Port Aft Crane Diesel Engine Caterpillar 3406 305 1998

EU

- 011 L Stb Fwd Crane Diesel Engine Caterpillar 3406 305 1998

EU

- 012 L Stb Aft Crane Diesel Engine Caterpillar 3406 305 1998

EU

- 013 L Mud and Cement Mixing Dust Collectors Metroplex Products C F 400R

- 129 NA

-- EU

- 014 L Mud Degassing Operations

-- -- NA

-- EU

- 015 L Emergency Generator Diesel Engine Caterpillar D3516A 2,064 1998

EU

- 016 L

- 17 L Cement Units 1

- 2 Diesel Engines Caterpillar 3412 CDITA 860 2001

EU

- 018 L Cementing Nitrogen Pump Diesel Engine b Caterpillar or similar 3406 CDITA

or similar 490 2000

EU

- 019 L POSU

- CA Primary Wireline Unit Diesel

Engine Hydraulic Generator Combination b Caterpillar or similar C

- 7 DITA or

similar 300 2009

EU

- 020 L Wireline Unit Alt #2 Diesel Engine b Caterpillar or similar C

- 7 DITA or

similar 300 2008

EU

- 022 L Wireline Unit Power P lant GSU

- W

Generator b Various Various 160 Various

EU

- 023 L Wireline Unit Hydraulic Diesel Generator

DHPS b Various Various 160 Various

EU

- 024 L Fast Rescue Craft Diesel Engine Steyr Motors M0144M38 142 2008

EU

- 025 L

- 028 L Lifeboat Diesel Engines 1

- 4 Bukh DV36

- 39 39 1998

EU

- 029 L

- 050 L Various Diesel Fuel Tanks

-- -- NA

-- EU

- 051 L Hydraulic Fluid Tank

-- -- NA

-- EU

- 052 L Base Oil Tank

-- -- NA

-- EU

- 053 L

- 059 L Cement and Wireline Unit Diesel Fuel Tanks

-- -- NA

-- EU

- 060 L Workboat Diesel Engines c (See Table 3) Various Various 10,632 Various

EU

- 061 L Fast Crew Boat Diesel Engines c (See Table 3) Various Various 4,800 Various

EU

- 062 L

- 089 L Support Vessel Tanks Diesel and Lube Oil

-- -- NA

-- EU

- 090 L

- 091 L Helifuel Tanks 1

- 2 Jet A

-- -- NA

-- EU

- 092 L Black Start Air Compressor Hatz E673L5 6 1998

a Permit conditions may limit operation to less than rated capacity.

b These units are po rtable and brought on the MODU as needed by a third party supplier. The exact engine available for use during the project has not been identified at the time of application. The replacement engine will meet an equivalent or a higher EPA Ti er standard.

c Ratings repre sent the total horsepower of all engines that could be operated on an individual support vessel.

* Horsepower5

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Table 2

– DD1 Emissions Units (Operating Scenario 2)

Emissions

Unit ID Engine Description Manufacturer Model Rating a ( h p ) * M fg

Year

EU

- 001 D

008 D Main Power Plant Diesel Engines 1

- 8 Caterpillar 3612 DITA 5,096 2002

EU

- 009 D Mud and Cement Mixing Dust Collectors Hydralift Procon

EU

- 010 D Mud Degassing Operations NA NA NA

-- EU

- 011 D Emergency Generator Diesel Engine Caterpillar 3516 2,229 2002

EU

- 012

- 013 D Cement Unit 1

- 2 Diesel Engine Caterpillar 3412 860 2001

EU

- 014 D Cementing Nitrogen Pump Diesel Engine b Caterpillar or similar 3406 or

similar 490 2000

EU

- 015 D Cement Batch Mixe r Diesel Engine Caterpillar 3126 250 2004

EU

- 016 D POSU

- CA Primary Wireline Unit Diesel Engine

Hydraulic Generator Combination b Caterpillar or similar C

- 7 DITA or

similar 300 2009

EU

- 017 D Wireline Unit Alt #2 Diesel Engine b Caterpillar or similar C

- 7 DITA or

similar 300 2008

EU

- 019 D Wireline Unit Power P lant GSU

- W Generator b Various Various 160 Various

EU

- 020 D Wireline Unit Hydraulic Diesel Generator

DHPS b Various Various 160 Various

EU

- 021 D Fast Rescue Craft Diesel Engine Steyr Motors M0144M38 142 2008

EU

- 022 D

025 D Lifeboat Diesel Engines 1

- 4 Steyr Motors M0144M38 110 2002

EU

- 026 D

032 D Various Diesel Fuel Tanks

-- -- NA 2002

EU

- 033 D Base Oil Tank

-- -- NA 2002

EU

- 034 D

047 D Various Diesel Fuel Tanks

-- -- NA

--

EU

- 048 D Workboat Diesel Engines c (See Table 3) Various Various 10,632 Various

EU

- 049 D Fast Crew Boat Diesel Engines c (See Table 3) Various Various 4,800 Various

EU

- 050 D

077 D Support Vessel Tanks Diesel and Lube Oil

-- -- NA

--

EU

- 078 D

081 D Helifuel Tanks 1

- 4 Jet A Sure Tank LTD ST

- 1430 NA 200 5

EU

- 082 Flaring Operations

-- -- NA

-- EU

- 083 Welding Operations

-- -- NA

-- EU

- 084 Painting Operations

-- -- NA

--

EU

- 085

- 087 Seismic Operations Engines Various QSX15G9

- NR2 or similar 415 2006

a Permit conditions may limit operation to less than rated capacity.

b T hese units are po rtable and brought on the MODU as needed by a third party supplier. The exact engine available for use during the project has not been identified at the time of application. The replacement engine will be equivalent or a higher EPA Tier standard.

c Ratings represent the total horsepower of all engines that could be operated on an individual support vessel.

* Horsepower

Table 3

– Support Vessels

Vessel Description Representative Vessel a Operating Scenario

Crew Boats Allie or similar Operating Scenario 1 and 2 Offshore Supply/Work Boats Fast Skipper or similar Operating Scenario 1 and 2

a Specific crew , supply, and work boats available for use during the drilling project had not been identified at the time of application. The representative vessel is the worst case vessel in the potential vessel fleet and used to calculate potential emissions.6

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- M 2 0 5 / 23 /2013 5 GENERAL CONDITIONS

5.1 Compliance

5.1.1 The permittee shall comply with all requirements of 40 CFR part 71, 40 CFR § 52.21,

40 CFR part 55 and this permit. Failure to do so shall be considered a violation of section 111(e) of the CAA. All enforcement provisions of the CAA, including, but not limited to, the provisions of sections 113, 114, 120, 303 and 304 of the C AA, shall apply to the OCS source and permittee

. [40 CFR § 55.8, 55.9(a) and (b)]

5.1.2 The permittee must comply with all conditions of this permit. All terms and conditions of this permit are enforceable by EPA and citizens under the CAA. Any permit noncompli ance constitutes a violation of the CAA and is grounds for enforcement action; for permit termination, revocation and reissuance, or modification; or for denial of a permit renewal application.

[40 CFR § 55.8, 71.6(a)(6)(i)]

5.1.3 It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit.

[40 CFR § 71.6(a)(6)(ii)]

5.2 Permit Shield

Compliance with the terms and condi tions of this permit shall be deemed compliance with the applicable requirements that are included and are specifically identified in this permit. Nothing in this permit shall alter or affect the following:

 The provisions of CAA section 303 (emergency ord ers), including the authority of the Administrator under that section;

 The liability of an owner or operator of a source for any violation of applicable requirements prior to or at the time of permit issuance; or

 The ability of EPA to obtain information fr om a source pursuant to CAA section 114.

[40 CFR § 71.6(f)(1)]

5.3 Other Credible Evidence

For the purpose of submitting compliance certifications in accordance with Condition 5.21 of this permit, or establishing whether or not a person has violated or is in violation of any requirement of this permit, nothing shall preclude the use, including the exclusive use, of any credible evidence or information, relevant to whether a source would have been in compliance with applicable requirements if the appropriate pe rformance or compliance test or procedure had been performed.

[CAA §§ 113(a) and (e)(1), 40 CFR §§ 60.11(g) and 61.12]7

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- M 2 0 5 / 23 /2013 5.4 Construction and Operation

5.4.1 As approved and conditioned by this permit, all construction and operation, including equipment operations and maintenance of the OCS source and support vessels shall be in accordance with the data, specifications, drawings, exhibits, and assumptions included with the application and supporting materials submitted by the permittee, which resulted in this permit (application materials). This permit is valid only for the specific processes and operations applied for and indicated in the application materials. Any unauthorized deviation from the application materials, or from any term or condition of this permit

ma y constitute grounds for revocation or enforcement action by EPA.

5.4.2 The permittee shall properly operate and maintain the OCS source and support vessels, including all systems of treatment and control (and related appurtenances) that are

installed and used by the permittee to achieve compliance with the terms and conditions of this permit. This provision includes the operation of backup or auxiliary facilities or similar systems when necessary to minimize or prevent emissions in achieving compliance with th e terms and conditions of the permit.

[ 40 CFR § 52.21(r)(1)]

5.5 Compliance and Other Requirements

This permit does not relieve the permittee of the responsibility to comply fully with applicable provisions of any other requirements under federal law.

[40 CFR § 55.6(a)(4)(iii)]

5.6 Notification to Owners, Operators and Contractors

The permittee must notify all other owners or operators, contractors, and the subsequent owners or operators associated with emissions from the OCS source and support vessels of the ter ms and conditions of this permit.

[40 CFR § 55.6(a)(4)(iv)]

5.7 Expiration of Approval to Construct and Permit Renewal

5.7.1 This approval to construct shall become invalid if: construction is not commenced within 18 months after the effective date of this permit, construction is discontinued for a period of 18 months or more, or construction is not completed within a reasonable time. EPA may extend the 18

- month period upon a satisfactory showing that an extension is justified.

[40 CFR § 52.21(r)(2)]

5.7.2 The permit tee’ s authority to construct and operate shall expire two years from the date the OCS Source commences activity on the DeSoto Canyon lease blocks specified in Section 3.0, Project Location

. The EPA may extend the two years upon a satisfactory showing that the extension is justified, and under the condition that project emissions do not exceed those specified in this permit.

[40 CFR § 52.21 ( i)(3 )]8

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- M 2 0 5 / 23 /2013 5.7.3 If the permittee’s authority to construct and operate has not expired pursuant to condition 5.7.2, then the permit expires on June 30, 2017

. Expiration of this permit terminates the permittee’s right to operate unless a timely and complete permit renewal application has

been submitted at least 6 months, but not more than 18 months, prior to the date of expiration of t his permit. If the permittee submits a timely and complete renewal application, and EPA does not take final action on the renewal application before the end of the term of this permit, the permittee’s failure to have a permit is not a violation of 40 CFR p art 71 until the permitting authority takes final action on the renewal application. Such protection will cease to apply if, subsequent to EPA’s determination that the renewal application is complete, the permittee fails to submit by the deadline specified in writing by EPA any additional information identified as being needed to process the application. This condition does not supersede the limitation on the permittee’s authority to construct and operate set forth in condition 5.7.2.

[40 CFR §§ 71.5(a)(1)( iii), 71.7(b) and 71.7(c)(1)(ii)]

5.7.4 If the permittee submits a timely and complete permit application for renewal, consistent with 40 CFR sections 71.5(a)(1)(iii) and 71.5(a)(2), but EPA does not take final action on the renewal application before the end o f the term of this permit, then all the terms and conditions of this permit, including any permit shield granted pursuant to

40 CFR § 71.6(f), shall remain in effect until EPA takes final action on the renewal application.

[40 CFR §§ 71.7(c)(3) and 71.7(b)]

5.7.5 Renewal of this permit is subject to the same procedural requirements that apply to initial permit issuance, including those for public participation and affected State review.

[40 CFR part 71.7(c)(1)(i)]

5.7.6 The application to EPA for renewal shall include all information required pursuant to

40 CFR § 71.5(c), as well as the current permit number, a description of permit revisions

and off

- permit changes that occurred during the permit term and were not incorporated into the permit during the permit term, any applicable requirements that were promulgated and not incorporated into the permit during the permit term, and other information required by the application form.

[40 CFR §§ 71.5(a)(2) and 71.5(c)(5)]

5.8 Property Rights

This permit does not convey any property rights of any sort, or any exclusive privilege.

[40 CFR §71.6(a)(6)(iv)]

5.9 Inspections

The permittee, by accepting this permit, specifically agrees to allow authorized EPA personnel, upon presentation of credentials or other documents as may be required by law and at reasonable times, access to the premises where the permitted activity is located or conducted or where any records are required to be kept under the terms and conditions of this permit to:9

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- M 2 0 5 / 23 /2013 5.9.1 Have access to and copy any records that m ust be kept under conditions of the permit, including but not limited to, information relating to the OCS source, support vessels, monitoring data, or compliance or noncompliance with the permit;

5.9.2 Inspect the OCS source, support vessels, equipment, practic es, or operation regulated or required under this permit; and

5.9.3 Sample or monitor any substances or parameters at any location reasonably necessary to assure compliance with this permit or EPA rules.

Reasonable time may depend on the nature of the concern being investigated.

[40 CFR § § 71.6(c)(2) and 55.8 ]

5.10 Emergency Provisions

In addition to any emergency or upset provision contained in any applicable requirement, the permittee may seek to establish that noncompliance with a technology

- based emission limitation under this permit was due to an emergency. An emergency constitutes an affirmative defense to an action brought for noncompliance with such technology

- based emissions limitation. The permittee shall demonstrate the affirmative defense of emergen cy through properly signed, contemporaneous operating logs, or other

relevant evidence that:

 An emergency occurred and that the permittee can identify the cause(s) of the emergency;

 The permitted facility was at the time being properly operated;

 During the period of the emergency the permittee took all reasonable steps to minimize levels of emissions that exceeded the emissions standards, or other requirements in this permit; and

 The permittee submitted notice of the emergency to EPA within 2 working day s of the time when emission limitations were exceeded due to the emergency. This notice must contain a description of the emergency, any steps taken to mitigate emissions, and corrective actions taken. This notice fulfills the requirements of Condition 5.1 7.2 of this permit, concerning prompt notification of deviations.

[40 CFR §§ 71.6(g)(2), (3) and (5)]

5.11 Burden of Proof for Emergencies

In any enforcement proceeding, the permittee attempting to establish the occurrence of an emergency has the burden of pro of. [40 CFR § 71.6(g)(4)]

5.12 Emergency Defined

An “emergency” means any situation arising from sudden and reasonably unforeseeable events beyond the control of the source, including acts of God, which situation requires immediate corrective action to

restor e normal operation, and that causes the source to exceed a technology

- based emission limitation under the permit due to unavoidable increases in emissions attributable to the emergency. An emergency shall not include noncompliance to the extent caused by i mproperly designed equipment, lack of preventive maintenance, careless or improper operation, or operator error.

[40 CFR § 71.6(g)(1)]10

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- M 2 0 5 / 23 /2013 5.13 Certification Requirement

Any document required to be submitted under this permit shall be certified by a responsible of ficial as to truth, accuracy and completeness. Such certifications shall state that based on information and belief formed after reasonable inquiry, the statements and information in the document are true, accurate, and complete.

[40 CFR §§ 71.5(d), 71.6(c )(1) and 71.9(h)(2)]

5.14 Permit Actions

This permit may be modified, revoked, reopened, and reissued, or terminated for cause. The filing of a request by the permittee for a permit modification, revocation and reissuance, or termination, or of a

notification of planned changes or anticipated noncompliance does not stay any permit condition.

[40 CFR § 71.6(a)(6)(iii)]

5.15 Reopening for Cause

The permit shall be reopened by EPA and the permit revised prior to expiration under any of the

circumstances described in 40 CFR § 71.7(f).

[40 CFR § 71.7(f)]

5.16 Recordkeeping Requirements

In accepting this permit, the permittee understands and agrees that all information relating to this permitted source which is submitted to EPA may be used by EPA as evidence in any enforceme nt case involving the permitted source arising under federal statutes, EPA rules, or rules enforceable by EPA.

5.16.1 This permit or a copy thereof shall be kept at the work site of the permitted activity.

5.16.2 The permittee shall furnish all r ecords required by this permit.

5.16.3 During enforcement actions, the retention period for all records will be extended automatically unless otherwise stipulated by EPA.

5.16.4 The permittee shall hold at the corporate offices of BHP Billiton Petroleum, Inc., located

at 1360 Post Oak B lvd., Suite 150, Houston, Texas 77056, records of all monitoring information required by the permit, copies of all reports required by this permit, and records of all data used to complete the application for this permit. These materials shall

be retained at least five years from the date of the sample, measurement, report, or application unless otherwise specified.

[40 CFR § § 71.6(a)(3)(ii)(B) and 55.8 ]

5.16.5 Records of monitoring information shall include:

 The date, emission unit or other place as defined in this permit, and time of sampling

or measurements;

 The results of such analyses and operating conditions as existing at the time of sample

or measurement;11

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 The date(s) the analyses were performed;

 The pe rson who performed the sampling or measurements; and

 The analytical techniques or methods used.

[40 CFR § 71.6(a)(3)(ii)(A)]

5.16.6 When requested by EPA, the permittee shall furnish any information required by law which is needed to determine compliance with th e permit. If the permittee becomes aware that relevant facts were not submitted or were incorrect in the permit application or in any report to EPA, such facts or information shall be corrected promptly.

[40 CFR § § 71.5(b) and 55.8 ]

All notifications, rep orting or other communications relating to this permit shall be

submitted to:

Chief

Air & EPCRA Enforcement Branch Air, Pesticides and Toxics Management Division U.S. EPA Region 4 61 Forsyth Street, SW Atlanta, GA 30303

In addition, electronic copies of the above

- referenced notifications and communications shall be submitted to the following individuals at their corresponding email address:

Name Email Phone David Lloyd lloyd.david@epa.gov 404

- 562

- 9216

Jason Dressler dressler.jason@epa.gov 404

- 562

- 9208 Kelly Fortin fortin

. kelly @epa.gov 404

- 562

- 91 17

5.16.7 The permittee shall furnish to EPA, within a reasonable time, any information that EPA may request in writing to determine whether cause exists for modifying, revoking, and reissuing, or termin ating the permit, or to determine compliance with the permit. Upon request, the permittee shall also furnish to EPA copies of records that are required to be kept pursuant to the terms of the permit, including information claimed to be confidential.

Inform ation claimed to be confidential must be accompanied by a claim of confidentiality according to the provisions of 40 CFR part 2, subpart B.

[40 CFR §§ 71.6(a)(6)(v), 71.5(a)(3) and 55.8 ]12

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- M 2 0 5 / 23 /2013 5.17 General Reporting Requirements

5.17.1 The permittee shall submit to EPA repo rts of any required monitoring for each six month reporting period from July 1 to December 31 and from January 1 to June 30, except that the first reporting period shall begin on the effective date of this permit and end on either June 30 or December 31, w hichever occurs first. All reports shall be submitted to EPA and shall be postmarked by the 30th day following the end of the reporting period. All instances of deviations from permit requirements must be clearly identified in such reports. All required re ports must be certified by a responsible official consistent with

Condition 5.13.

[40 CFR § § 71.6(a)(3)(iii)(A) and 55.8 ]

5.17.2 The permittee shall promptly report to EPA, by telephone or facsimile, deviations from permit conditions, including those attributabl e to upset conditions as defined in this permit, the probable cause of such deviations, and any corrective actions or preventive measures taken. The report shall be made using the following numbers:

Telephone: (404) 562

- 9194 Facsimile: (404) 562

- 9019

At tn: Air Permits Part 71 Deviation Report

[40 CFR § 71.6(a)(3)(iii)(B)]

5.17.3 For the purposes of Condition 5.17.2 of the permit, prompt is defined as follows:

5.17.3.1 Any definition of prompt or a specific time frame for reporting deviations

provided in an underlying applicable requirement as identified in this permit.

5.17.3.2 Where the underlying applicable requirement fails to address the time frame

for reporting deviations, reports of deviations will be submitted based on the following schedule:

 For emissions of a hazardo us air pollutant or a toxic air pollutant (as identified in the applicable regulation) that continue for more than an hour in excess of permit requirements, the report must be made within

24 hours of the occurrence;

 For emissions of any regulated pollutan t excluding those referenced in the preceding bullet, that continue for more than 2 hours in excess of permit requirements, the report must be made within 48 hours of the occurrence;

or

 For all other deviations from permit requirements, the report shall be

submitted with the semi

- annual monitoring report required in Condition

5.17.1.

[40 CFR § 71.6(a)(3)(iii)(B)]13

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- M 2 0 5 / 23 /2013 5.17.4 Within 10 working days of the occurrence of a deviation that requires 24

- hr or 48

- hr

notification as provided in Condition 5.17.3.2 above, the pe rmittee shall also submit a written notice, which shall include a narrative description of the deviation and updated information as listed below to EPA, certified consistent with Condition 5.13 of this permit. When reporting excess emissions or permit devi ations, including those that are required to be submitted for the first time with the semi

- annual monitoring report, the permittee must report in writing the following information:

 OCS Source (Facility) Name;

 OCS Air Permit Number;

 Company Name;

 Date/Time when the deviation was discovered;

 Date/Time when the event began (24

- hour clock);

 Date/Time when the event ended (24

- hour clock);

 Duration of the event: (hours: minutes) or days (total number of hours, minutes or days, if intermittent then include only t he duration of the deviation);

 If the deviation was intermittent or continuous;

 Brief description of what happened and the cause, including information regarding the operating conditions during the deviation;

 Identification of the emission unit(s) or sourc e(s) involved in the event using the same identification number(s) and name(s) as in the permit;

 Identification of each emission limit potentially exceeded during the event and the level of exceedance, if applicable;

 Whether the deviation was unavoidable;

 Describe corrective action taken and action taken to prevent future recurrence;

 If not corrected, the anticipated time the deviation is expected to continue and steps being taken to reduce, eliminate, and prevent recurrence of the deviation; and

 Certifica tion: Based on information and belief formed after reasonable inquiry, certify that the statements and information reported are true, accurate, and complete.

[40 CFR §§ 71.6(a)(3)(i)(B) and (iii)(B)]

5.17.5 For the purposes of Conditions 5.17.1 through 5.17.5, d eviation means any situation in which the permittee fails to meet a permit term or condition. A deviation is not always a violation. A deviation can be determined by observation or through review of data obtained from any testing, monitoring, or recordkeep ing required by this permit. For a situation lasting more than 24 hours, each 24

- hour period is considered a separate deviation. Included in the meaning of deviation are any of the following:

 A situation where emissions exceed an emission limitation or st andard;

 A situation where process or emissions control device parameter values indicate that an emission limitation or standard has not been met;

 A situation in which observations or data collected demonstrate noncompliance with

an emission limitation or standard or any work practice or operating condition required by the permit (including indicators of compliance revealed through parameter monitoring); and14

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 A situation in which any testing, monitoring, recordkeeping or reporting required by this permit is not performed or not performed as required.

[40 CFR § 71.6(a)(3)(iii)(C)]

5.17.6 If requested by EPA, the permittee shall provide a more detailed written report as requested to follow up on an excess emissions/deviation report.

[40 CFR § 71.6(a)(3)(iii)(B)]

5.18 O ff Permit Changes

The permittee is allowed to make certain changes without a permit revision, provided that the following requirements are met:

 Each change is not addressed or prohibited by this permit;

 Each change shall meet all applicable requirements and shall not violate any existing permit term or condition;

 Changes under this provision may not include changes subject to any requirement under any provision of title I of the Clean Air Act;

 The permittee shall provide contemporaneous written notice t o EPA of each change, except for changes that qualify as insignificant activities under 40 CFR § 71.5(c)(11). The written notice shall describe each change, the date of the change, any change in emissions, pollutants emitted and any applicable requirements that would apply as a result of the change;

 The permit shield in Condition 5.2 does not apply to changes made under this provision; and

 The permittee shall keep a record describing all changes that result in emissions of any regulated air pollutant subjec t to any applicable requirement not otherwise regulated under this permit, and the emissions resulting from those changes.

[40 CFR §71.6(a)(12)]

5.19 Operational Flexibility

The permittee is allowed to make a limited class of changes under section 502(b)(10) of the CAA within this permitted facility without applying for a permit revision, provided the changes do not exceed the emissions allowable under this permit (whether expressed therein as a rate of emissions or in terms of total emissions) and are not tit le I modifications. This class of changes does not include changes that would violate applicable requirements or changes that would contravene federally enforceable permit terms and conditions that are monitoring (including test methods), recordkeeping, re porting, or compliance certification requirements.

[40 CFR § 71.2 and 71.6(a)(13)(i)]

5.19.1 The permittee is required to send a notice to EPA at least 7 days in advance of any change made under this provision. The notice must describe the change, when it will

o ccur and any change in emissions, and identify any permit terms or conditions made inapplicable as a result of the change. The permittee shall attach each notice to its copy this permit.

[40 CFR § 71.6(a)(13)(i)(A)]15

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[40 CFR § 71.6(a)(13)(i)(B)]

5.20 Combined Operating Scenarios

In the event that more than one MODU is constructed or operated during any compliance period, such a s a 12

- month rolling average, any applicable condition of this permit, including but not limited to emission limits, fuel consumption limits, operating limits, and fee calculations, shall be prorated based on the duration of the operation of each MODU duri ng the compliance period. In no case does this condition allow for the simultaneous operation of more than one MODU under the terms of this permit.

[40 CFR § 55.6]

5.21 Annual Compliance Certification

The permittee shall submit to EPA a certification of compliance with permit terms and conditions, including emission limitations, standards, or work practices, postmarked by February 28 of each year and covering the previous calendar year except that the f irst certification shall cover the period from the effective date of this permit through December 31. The compliance certification shall be certified as to truth, accuracy and completeness by a responsible official consistent with Condition 5.13 of this pe rmit. The certification shall include the following:

 The identification of each permit term or condition that is the basis of the certification;

 The identification of the method(s) or other means used by the permittee for determining the compliance stat us with each term and condition during the certification period. Such methods and other means shall include, at a minimum, the methods and means required in this permit. If necessary, the permittee also shall identify any other material information that mu st be included in the certification to comply with section 113(c)(2) of the CAA, which prohibits knowingly making a false certification or omitting material information;

 The status of compliance with each term and condition of the permit for the period co vered by the certification, including whether compliance during the period was continuous or intermittent. The certification shall be based on the method or means designated above. The certification shall identify each deviation and take it into account in the compliance certification; and

 A summary of NO X , CO, PM/PM 10 /PM 2.5 , SO 2 , VOC, GHG and HAP emissions in tons per year emitted by each emissions unit regulated under this permit during the duration of the reporting period based on recorded data, such as actual fuel usage and actual hours of operation.

[40 CFR §71.6(c)(5), 55.6(a)(4) and 55.8 ]

5.22 Compliance Schedule

For applicable requirements with which the source is in compliance, the permittee will continue to comply with such requirements. For applicable requirements that will become effective during the permit term, the permittee shall meet such requirements on a timely basis.

[40 CFR §§ 71.6(c)(3) and 71.5(c)(8)(iii)(A) and (B)]16

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- M 2 0 5 / 23 /2013 5.23 Safe Shutdown

As provided in 40 CFR § 55.9(c), if this OCS source is ord ered to cease operation of any piece of equipment due to enforcement action taken by EPA, the shutdown will be coordinated by EPA with the

DOI Bureau of Safety and Environmental Enforcement , the United States Coast Guard, the permittee, and the operator to assure that the shutdown will proceed in a safe manner. No shutdown action will occur until after EPA’s consultation with these agencies, but in no case will initiation of the shutdown be delayed by more than 24 hours after EPA consults with these agencie s. The initiation of the shutdown process will not preclude well procedures necessary to ensure safety.

[40 CFR § 55.9(c)]

5.24 Transfer of Ownership

In the event of any changes in control or ownership of the OCS source, this permit shall be binding on

all subsequent owners and operators. Permittee shall notify the succeeding owner and operator of the existence of this permit and its conditions by letter, a copy of which shall be forwarded to EPA Region 4.

[40 CFR § 55.6(a)(4)(iv)]

5.25 Severability

The provisions of this permit are severable, and, in the event of any challenge to any portion of this permit or if any provision of the permit is held invalid, the remainder of this permit shall remain valid

and in force

. [40 CFR §71.6(a)(5)]

5.26 General Test ing Requirements

5.26.1 In addition to the specific testing requirements contained in the emission unit sections of this permit, the permittee shall comply with the generally applicable testing requirements in Conditions 5.26.2 through 5.26.10 whenever conductin g a performance test required by this permit unless specifically s tated otherwise in this permit.

5.26.2 The permittee shall provide EPA at least 30 days prior notice of any performance test, except as otherwise specified in this permit, to afford EPA the opport unity to have an observer present. If after 30 days notice for an initially scheduled performance test, there is a delay in conducting the scheduled performance test, the permittee shall notify EPA as soon as possible of any delay in the original test date , either by providing at least 7 d ays prior notice of the rescheduled date of the performance test, or by arranging a

rescheduled dat e with EPA by mutual agreement.

5.26.3 The permittee shall submit to EPA a source test plan 30 days prior to any required testing . The source test plan shall include and address the following elements:

 Purpose and scope of testing;

 Source description, including a description of the operating scenarios and mode of operation during testing and including fuel sampling and analysis pr ocedures;

 Schedule/dates of testing;17

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 Process data to be collected during the test and reported with the results, including

source

- specific data identified in the emission unit sections of this permit;

 Sampling and analysis procedures, specifically reque sting approval for any proposed alternatives to the reference test methods, and addressing minimum test length ( e.g. , one hour, 8 hours, 24 hours, etc.) and minimum sample volume;

 Sampling location description and compliance with the reference test methods;

 Analysis procedures and laboratory identification;

 Quality assurance plan;

 Calibration procedures and frequency;

 Sample recovery and field documentation;

 Chain of custody pr ocedures;

 Quality assurance/quality control project flow chart;

 Data processing and reporting;

 Description of data handling and quality control procedures; and

 Report content and timing.

5.26.4 Only regular operating staff may adjust the processes or emission control devices during

or within two ( 2 ) hours prior to the start of a source test. Any operating adjustments made during a source test that do not result in represen ta tive testing conditions may render the

source test invalid.

5.26.5 For the duration of each t est run (unless otherwise specified), the permittee shall record the following information:

 All data which is required to be monitored during the test in the emission unit sections of this permit; and

 All continuous monitoring system data that is required to be routinely monitored in the emission unit sections of this permit for the emission unit being tested.

5.26.6 Each source test shall follow the reference test methods specified by this permit and

consist of at least 3 valid test runs conducted under normal operating conditions.

5.26.7 If the reference test method yields measured pollutant concentration values at an oxygen concentration other than specified in the emission standard, the permittee shall correct the measured pollutant concentration to the oxygen conc entration specified in the emission standard by using the following equation:

PC X = PC

m x (21

- X)

(21

- Y)

Where:

PC X = Pollutant concentration at X percent;

PC

m = Pollutant concentration as measured; X = the oxygen concentration specified in the standard; and Y = the measured average volumetric oxygen concentration.18

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- M 2 0 5 / 23 /2013 5.26.8 Facilities for performing and observing the emission testing shall be provided that meet the requirements of 40 CFR § 60.8(e) and Reference Method 1 (40 CFR § 60, Appendix A).

5.26.9 Emission test reports shall be submitted to EPA within 45 days of completing any emission test required by this permit along with items required to be recorded in

Condition 5.26.5 above.

5.26.10 Source test emission data shall be reported as the arithmetic average of all valid test runs and in the terms of any applicable emission limit, unless otherwise specified in the emission unit sections of this permit.

[40 CFR §§ 71.6(a)(3) and 71.6(c)(1)]

5.27 Fee Payment

5.27.1 No later than April 1 of the subsequent year, the permittee shall submit the following to

EPA:

 Full payment of the annual permit fee, as specified in Conditions 5.27.2 through 5.27.11;

 An updated fee calculation worksheet form and a photocopy of each fee payment check (or other conf

irmation of actual fee paid), as specified in Condit ions 5.27.4 through 5.27.8; and

 An annual emissions report of actual emissions, as specified in Condition 5.27.6, for the preceding calendar year.

[40 CFR §§ 71.9(a) and (h)]

5.27.2 The fee payment shall be in United States currency and shall be paid by money order, bank draft, certified check, corporate check, or electronic funds transfer payable to the order of the U.S. Environmental Protection Agency.

[40 CFR § 71.9(k)(1)]

5.27.3 The permittee shall send fee paymen t and a completed fee filing form to either of the

addresses listed below.

If sent by Regular Mail through U.S. Postal Service (USPS)

, send to:

U.S. Environmental Protection Agency FOIA and Miscellaneous Payments

Cincinnati Finance Center

PO Box 979078

S t. Louis, MO 63197

- 900019

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If sent by Express Delivery (or when a physical address is required)

, send to:

U.S. Bank

Government Lockbox 979078 US EPA FOIA & Misc. Payments

1005 Convention Plaza

Mail Station SL

- MO

- C2GL St. Louis, MO 63101

Contact: Natalie Pearson (314

- 418

- 4087)

[40 CFR § 71.9(k)(2)]

5.27.4 The permittee shall send an updated fee calculation worksheet form and a photocopy of each fee payment check (or other confirmation of actual fee paid), submitted annually by the date specified in Condition 5. 27.1, to:

Chief

Air Permits Section Air, Pesticides and Toxics Management Division U.S. EPA Region 4 61 Forsyth Street, SW Atlanta, GA 30303

[40 CFR § 71.9(h)(1)]

5.27.5 The annual emissions fee shall be calculated by multiplying the total tons of actual emissions of all “regulated pollutants (for fee calculation),” emitted from the source by the presumptive emission fee (in dollars/ton) in effect at the time of calculation. The presumptive emission fee is revised each calendar year and is available from E PA prior to the start of each calendar year. [40 CFR § 71.9(c)(1)]

5.27.5.1 “Actual emissions” means the actual rate of emissions in tons per year (TPY) of any “regulated pollutant (for fee calculation),” as defined in 40 CFR § 71.2, emitted from a part 71 source over the preceding calendar year. Actual emissions shall be calculated using each emissions unit’s actual operating hours, production rates, in

- place control equipment, and types of materials processed, stored, or combusted during the preceding calendar y ear.

[40 CFR § 71.9(c)(6)]

5.27.5.2 Actual emissions shall be computed using methods required by the permit for determining compliance, such as monitoring or source testing data.

[40 CFR § 71.9(h)(3)]

5.27.5.3 If actual emissions cannot be determined using the compliance methods in the permit, the permittee shall use other federally recognized procedures.

[40 CFR § 71.9(e)(2)]20

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5.27.5.4 The permittee shall exclude the following emissions from the calculation of

fees:

 The amount of actual emissions of each regulated pollutant (for f ee calculation) that the source emits in excess of 4,000 tons per year;

 Actual emissions of any regulated pollutant (for fee calculation) already

inclu ded in the fee calculation; and

 The insignificant quantities of actual emissions not required to be list ed or calculated in a permit application pursuant to 40 CFR § 71.5(c)(11).

[40 CFR §§ 71.9(c)(5)(i) through (iii)]

5.27.6 The permittee shall submit an annual emissions report of its actual emissions for the preceding calendar year. The annual emissions report shall be certified by a responsible official and shall be submitted each year to EPA by the date specified in Condition 5.27.1. The annual emissions report shall be submitted to EPA at the address listed in Condition 5.27.3 of this permit.

[40 CFR §§ 71.9( h)(1) and (2)]

5.27.7 Fee calculation worksheets shall be certified as to truth, accuracy, and completeness by a responsible official in accordance with Condition 5.13 of this permit.

[40 CFR § 71.9(h)(2)]

5.27.8 The permittee shall retain in accordance with the provi sions of Conditions 5.16.4 and 5.16.5 of this permit, all worksheets and other materials used to determine fee payments. Records shall be retained for five years following the year in which the emissions data is

submitted.

[40 CFR § 71.9(i)]

5.27.9 Failure of th e permittee to pay fees in a timely manner shall subject the permittee to assessment of penalties and interest.

[40 CFR § 71.9(l)]

5.27.10 The permittee, when notified by EPA of additional amounts due, shall remit full payment within 30 days of receipt of an invoice from EPA.

[40 CFR § 71.9(j)(2)]

5.27.11 If the permittee thinks an EPA assessed fee is in error and wishes to challenge such fee, the permittee shall provide a written explanation of the alleged error to EPA along with full payment of the EPA assessed fee

. [40 CFR § 71.9(j)(3)]21

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- M 2 0 5 / 23 /2013 6 S PECIFIC CONDITIONS

6.1 Drill Site Notification

At least 10 days prior to entering the drill site, the permittee shall notify EPA in writing in accordance with Condition 5.16.7 of this permit, of the following information:

6.1.1 The location of the proposed drill site, using coordinates in the following formats:

 Latitude and longitude; and

 Universal Transverse Mercator grid system.

6.1.2 The proposed date that the MODU will enter the lease block and commence construction or operation and the probable duration of operation at that location; and

6.1.3 Not less than 24 hours prior to commencing construction or operation, of any changes to the information provided by the permittee in Conditions 6.1.1 and 6.1.2.

[40 CFR §§ 71.6(a) (6)(v), 5 2.21 and 5 5.8 ]

6.2 Drilling Limitations

6.2.1 The permittee shall not operate the C.R. Luigs drillship and the DD1 drilling unit concurrently within the lease blocks specified in section 3 of this permit

.

6.2.2 The total combined hours of operation of the C.R. Luigs and the DD1 MODUs shall not exceed 6,570 hours per year on a rolling 12

- month basis.

6.2.3 Compliance with this operating limit will be assured by maintaining a record of operating

hours and summi ng such hours on a rolling 12

- month basis

. [40 CFR § 55.6(a)]

6.3 Support Vessel Identification

The permittee shall maintain records

, in accordance with Condition 5.16

, of the engine specifications and number of hours operated within 25 miles of a MODU for any support vessel used in place of the

Allie (work boat) or the Fast Skipper (crew boat). These records , as well as engine emission factors and

calculated mass emissions in tons per year of regulated pollutant, shall be submitted a s part of the Annual Compliance Certification in accordance with Condition 5.21.

[40 CFR § 55

. 8 ]

6.4 Sourc e

- wide SO 2 Emission Limit

The permittee shall not combust any diesel fuel with a sulfur content greater than 15 parts per million (ppm) by weight, as determined by Condition 6. 4 .1, in any diesel fueled emission unit on C.R. Luigs

, DD1 , or any support vessel.22

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- M 2 0 5 / 23 /2013 6.4.1 The permittee shall obtain a certification of sulfur content for each shipment of fuel from the fuel supplier (the certification must indicate the sulfur content was determined by an approved EPA method ), o r the permittee shall obtain representati ve fuel samples using

one of the methods in 40 CFR 80.330 and shall determine the sulfur content of the fuel using one of the methods in 40 CFR 80.580.

6.4.2 Monitoring, Recordkeeping and Reporting

6.4.2.1 Prior to mobilizing the selected MODU for activities covered b y this permit, the permittee shall determine and record the sulfur content of the diesel fuel on the

MODU and the support vessels using the procedures in Condition 6.4.1.

6.4.2.2 Thereafter, the permittee shall determine and record the sulfur content of the

diese l fuel on the MODU and the support vessels using the procedures in

Condition 6.4.1 upon receiving each fuel shipment

.

6.4.3 The permittee shall provide the results of all fuel sample analyses required by Conditions 6.4.1 and 6.4.2 with the Compliance Certification Report required by Condition 5.21.

[40 CFR §§ 52.21, 71.6(a)(3) and (c)(1) , and 55.8 ]

6.5 C.R. Luigs Emission and Operating Limits

6.5.1 Source Identification: EU

- 001 L through

- 008 L , main power plant engines equipped with positive crankcase ventilatio n, turbocharger and aftercooler, and high

- pressure fuel injection with aftercooler.

6.5.1.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from each engine in excess of:

6.5.1.1.1 NO X BACT Limit: 1 8

. 1 g/kW

- hr (12.1 g/kW

- hr, corrected to 95%

NO) on a rolling 24

- hour average basis.

6.5.1.1.2 CO BACT Limit: 2.42 g/kW

- hr on a rolling 24

- hour average basis.

6.5.1.1.3 VOC BACT Limit: 6.42 x 10 - 4 lb/hp

- hr (0.39 g/kW

- hr) on a rolling

24

- hour average basis.

6.5.1.1.4 PM BACT Limit: 7.00 x 10 - 4 lb/hp

- hr (0.43 g/kW

- hr) on a rolling

24

- hour average basis.

6.5.1.1.5 PM 10 BACT Limit: 4.01 x 10 - 4 lb/hp

- hr (0.24 g/kW

- hr) on a rolling

24

- hour average basis.

6.5.1.1.6 PM 2.5 BACT Limit: 3.89 x 10 - 4 lb/hp

- hr (0.24 g/kW

- hr) on a rolling

24

- hour average basis.23

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6.5.1.1.7 GHG BACT Limits: 1.16 lb/hp

- hr (705 g/kW

- hr) of CO 2 e on a

rolling 24

- hour average basis and 78,005 tons per year of CO 2 e on a rolling 12

- month basis. **

6.5.1.2 BACT Work Practice Standards:

6.5.1.2.1 Use of ultra low sulfur diesel ;

6.5.1.2.2 G ood combustion practices based on the current manufacturer’s

specifications for these engines ; and

6.5.1.2.3 A dditional enhanced work practice standards as detailed in the

application received (by EPA) on October 20, 2010; and application addendums received on February 11, 2011; October 27, 2011; and

D ecember 22, 2011, respectively. The application is provided in the administrative record and defines a detailed engine performance management system and the Diesel Engines with Turbochargers (DEWT) monitoring system designed by Transocean. A parametric

mon itoring system equivalent to DEWT may be used with prior EPA approval.

6.5.1.3 Compliance Demonstration Method for units EU

- 01 L through

- 08 L : The permittee shall monitor emissions by the use of an EPA

- approved continuous emissions monitoring system, an EPA

- approv ed stack testing emissions monitoring system, or, with prior written approval by EPA, an alternative parametric monitoring method pursuant to Condition 6. 9

.

6.5.1.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6. 9 and 6 .1 8

.

6.5.2 Source Identification: EU

- 009 L through

- 012 L , crane engines equipped with positive crankcase ventilation, turbocharger and aftercooler, and high

- pressure fuel injection with

aftercooler.

6.5.2.1 The permittee shall not discharge or cause the discharge of em issions into the atmosphere from the engines combined in excess of:

6.5.2.1.1 NO X BACT Emission Limit: 82.83 tons per year on a 12

- month

rolling total basis.

6.5.2.1.2 CO BACT Emission Limit: 17.85 tons per year on a 12

- month

rolling total basis.

6.5.2.1.3 VOC BACT Emission Limit: 6.72 tons per year on a 12

- month

rolling total basis.

6.5.2.1.4 PM/PM 10 /PM 2.5 BACT Emission Limit: 5.88 tons per year on a 12

-

month rolling total basis.24

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6.5.2.1.5 GHG BACT Emission Limit: 3,083 tons per year of CO 2 e on a 12

-

month rolling total basis. **

6.5.2.2 BACT Work Practice Standards :

6.5.2.2.1 Use of ultra low sulfur diesel fuel

, and

6.5.2.2.2 G ood combustion practices based on the current manufacturer’s

specifications for these engines.

6.5.2.3 Operating Limit: These units shall be operated no more than 17,520 hours per

year combined on a 12

- month rolling total basis.

6.5.2.4 Compliance with this operating limit will be assured by maintaining a record of hours of operation and summing such hours on a rolling 12

- month basis.

6.5.2.5 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Cond itions 6.1 0 and 6.1 8

.

6.5.3 Source Identification: EU

- 013 L , mud and cement mixing, equipped with dust collectors.

6.5.3.1 PM/PM 10 /PM 2.5 BACT Emission Limit: 1.08 tons per year on a 12

- month rolling total basis.

6.5.3.2 BACT Work Practice Standard: Proper maintenance and operation of the dust

collectors in accordance with manufacturer specifications to ensure a control efficiency of 99.95%.

6.5.3.3 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 3 and 6.1 8

.

6.5.4 Source Identification: EU

- 014 L , mud degassing operations.

6.5.4.1 VOC BACT Emission Limit: 19.39 tons per year on a 12

- month rolling total

basis.

6.5.4.2 GHG BACT Emission Limit: 982.7 tons per year of CO 2 e on a 12

- month rolling

total basis. **

6.5.4.3 The permittee shall determine the water

- based mu d/oil

- based mud ratio to

ensure it does not exceed 2:5 based on a 12

- month rolling average.

6.5.4.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 4 and 6.1 8

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- M 2 0 5 / 23 /2013 6.5.5 Source Identification: EU

- 015 L , emergency generator engin e, equipped with positive crankcase ventilation, turbocharger and aftercooler, and high

- pressure fuel injection with

aftercooler.

6.5.5.1 NO X BACT Emission Limit: 1.49 tons per year on a 12

- month rolling total

basis.

6.5.5.2 CO BACT Emission Limit: 0.34 ton s per year on a 12

- month rolling total basis.

6.5.5.3 VOC BACT Emission Limit: 0.04 ton s per year on a 12

- month rolling total

basis.

6.5.5.4 PM BACT Emission Limit: 0.04 ton s per year on a 12

- month rolling total basis.

6.5.5.5 PM 10 /PM 2.5 BACT Emission Limit: 0.02 ton s per year on a 12

- month rolling

total basis.

6.5.5.6 GHG BACT Emission Limit: 72.06 tons per year of CO 2 e on a 12

- month rolling

total basis. **

6.5.5.7 BACT Work Practice Standards:

6.5.5.7.1 Use of ultra low sulfur diesel fuel

, and

6.5.5.7.2 G ood combustion practices based on the curren t manufacturer’s

specifications for this engine.

6.5.5.8 Operating Limit: This unit shall be operated no more than 60 hours per year on

a 12

- month rolling total basis.

6.5.5.9 Compliance with this operating limit will be assured by maintaining a record of hours of opera tion and summing such hours on a rolling 12

- month basis.

6.5.5.10 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.5.6 Source Identification: EU

- 092 L , black start air compressor.

6.5.6.1 BACT Work Practice Standards:

6.5.6.1.1 Use of ultra low sulfur diesel fuel

, and

6.5.6.1.2 G ood combustion practices based on the current manufacturer’s

specifications for this engine.

6.5.6.2 Operating Limit: This unit shall be operated no more than 25 hours per year on

a 12

- month rolling total basis.26

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6.5.6.3 Compliance with this operating limit will be assured by maintaining a record of hours of operation and summing such hours on a rolling 12

- month basis.

6.5.6.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.5.7 Source Identification: EU

- 016 L through

- 018 L , cementing engines and cementing nitrogen pump engine, equipped with closed crankcase ventilation, turbocharger (without aftercooler), and high

- pressure fuel injection with aftercooler.

6.5.7.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from the engines combined in excess of:

6.5.7.1.1 NO X BACT Emission Limit: 8.69 tons per year on a 12

- month

rolling total basis.

6.5.7.1.2 CO BACT Emission Limit: 3.30 tons per year on a 12

- month rolling

total basis.

6.5.7.1.3 VOC BACT Emission Limit: 0.38 ton s per year on a 12

- month

rolling total basis.

6.5.7.1.4 PM BACT Emission Limit: 0.38 ton s per year on a 12

- month rolling

total basis.

6.5.7.1.5 PM 10 BACT Emission Limit: 0.23 ton s per year on a 12

- month

rolling total basis.

6.5.7.1.6 PM 2.5 BACT Emission Limit: 0.22 ton s per year on a 12

- month

rolling total basis.

6.5.7.1.7 GHG BACT Emission Limit: 628.9 tons per year of CO 2 e on a 12

-

month rolling total basis. **

6.5.7.2 BACT Work Practice Standards:

6.5.7.2.1 Use of certified EPA Tier 1 (or better) Marine engines for EU

- 016 L

and

- 017 L and Tier 1 (or better) Non r oad engine for EU

- 018 L ;

6.5.7.2.2 Use of ultra low sulfur diesel fuel ; and

6.5.7.2.3 G ood combustion practices based on the current manufacturer’s

specifications for these engines.

6.5.7.3 Operating Limit: Units EU

- 016 L and

- 017 L s hall be operated no more than

1200 hours per year combined on a 12

- month rolling total basis.27

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6.5.7.4 Operating Limit: Unit EU

- 018 L shall be operated no more than 100 hours per year on a 12

- month rolling total basis.

6.5.7.5 Compliance with th ese operating limit s will be assured by maintaining a record

of hours of operation and summing such hours on a rolling 12

- month basis.

6.5.7.6 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.5.8 Source Identification: EU

- 019 L

, - 020 L

, - 022 L , and

- 023 L ; wireline unit engines (including primary, alternative #2, and power plant generator, and hydraulic generator), equipped with turbocharger and aftercooler (EU

- 019 L and

- 020 L only), and high

pressure fuel injection with aftercooler.

6.5.8.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from the engines combined in excess of:

6.5.8.1.1 NO X BACT Emission Limit: 8.92 tons per year on a 12

- month

rolling total basis.

6.5.8.1.2 CO BACT Emission Limit: 2.90 tons per year o n a 12

- month rolling

total basis.

6.5.8.1.3 VOC BACT Emission Limit: 1.17 tons per year on a 12

- month

rolling total basis.

6.5.8.1.4 PM/PM 10 /PM 2.5 BACT Emission Limit: 0.60 ton s per year on a 12

-

month rolling total basis.

6.5.8.1.5 GHG BACT Emission Limit: 536.6 tons per year of CO 2 e on a 12

-

month rolling total basis. **

6.5.8.2 BACT Work Practice Standards:

6.5.8.2.1 Use of certified EPA Tier 2 Nonroad (or better) engines for

EU

- 022 L and

- 023 L and Tier 3 Nonroad (or better) engines for

EU

- 019 L and

- 020 L ;

6.5.8.2.2 Use of ultra low sulfur diesel fuel ; and

6.5.8.2.3 G ood combustion practices based on the current manufacturer’s

specifications for these engines.

6.5.8.3 Operating Limit: Units EU

- 019 L and

- 020 L shall be operated no more than 1,500 hours per year combined on a 12

- month rolling total basis.

6.5.8.4 Operating Limit: Unit EU

- 022 L shall be operated no more than 1

, 700 hours per year on a 12

- month rolling total basis.28

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6.5.8.5 Operating Limit: Unit EU

- 023 L shall be operated no more than 1

, 300 hours per year on a 12

- month rolling total basis.

6.5.8.6 Compliance with th ese operating limit s wil l be assured by maintaining a record

of hours of operation and summing such hours on a rolling 12

- month basis.

6.5.8.7 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 5

.

6.5.9 Source Identification: EU

- 024 L , fast rescue craft engine, equipped with turbocharger (without aftercooler).

6.5.9.1 Work Practice Standards:

6.5.9.1.1 Use of ultra low sulfur diesel fuel

, and

6.5.9.1.2 G ood combustion practices based on the current manufacturer’s

specifications for this engine.

6.5.9.2 Operating Limit: This unit shall be operated no more than 25 hours per year on

a 12

- month rolling total basis.

6.5.9.3 Compliance with this operating limit will be assured by maintaining a record of hours of operation and summing such hours on a rolling 12

- month basis.

6.5.9.4 Monitoring, r ecordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.5.10 Source Identification: EU

- 025 L through

- 028 L , life boat engines.

6.5.10.1 Work Practice Standards:

6.5.10.1.1 Use of ultra low sulfur diesel fuel

, and

6.5.10.1.2 G ood combustion practices base d on the current manufacturer’s

specifications for these engines.

6.5.10.2 Operating Limit: These units shall be operated no more than 25 hours per year

each on a 12

- month rolling total basis.

6.5.10.3 Compliance with this operating limit will be assured by maintaining a record of hours of operation and summing such hours on a rolling 12

- month basis.

6.5.10.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.29

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- 029 L through

- 059 L and EU

- 090 L through

- 091 L , storage
tanks.

6.5.11.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from the storage tanks combined in excess of:

6.5.11.1.1 VOC BACT Emission Limit: 0.57 ton s per year on a 12

- month

rolling total basis.

6.5.11.2 BACT Wo rk Practice Standard: Use of good maintenance practices.

6.5.11.3 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 1 and 6.1 8

.

[40 CFR §§ 52.21, 71.6(a)(1), (a)(3) and (c)(1) and 55.8 ]

6.6 DD1 Emission and Operating Limits

6.6.1 S ource Identification: EU

- 001 D through

- 008 D , main power plant engines equipped with positive crankcase ventilation, turbocharger and aftercooler, and high

- pressure fuel injection /high

- efficiency fuel injection with aftercooler.

6.6.1.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from each engine in excess of:

6.6.1.1.1 NO X BACT Limit: 12.1 g/kW

- hr ( 8.10 g/kW

- hr, corrected to 95%

NO) on a rolling 24

- hour average basis.

6.6.1.1.2 CO BACT Limit: 1.98 g/kW

- hr on a rolling 24

- hour average basis.

6.6.1.1.3 VOC BACT Limit s :

6.6.1.1.3.1 1.02 x 10 - 3 lb/hp

- hr (0. 62 g/kW

- hr) for engine loads

< 55% ; or

6.6.1.1.3.2 8.22 x 10 - 4 lb/hp

- hr (0.50 g/kW

- hr) for engine loads

≥ 55%

on a rolling 24

- hour average basis specific to each load scenario

.

6.6.1.1.4 PM /PM 10 /PM 2.5 BACT Limit s :

6.6.1.1.4.1 9.3 7 x 10 - 4 lb/hp

- hr (0. 57 g/kW

- hr) for engine loads

< 55%; or

6.6.1.1.4.2 7.07 x 10 - 4 lb/hp

- hr (0.43 g/kW

- hr) for engine loads

≥ 55%

on a rolling 24

- hour average basis specific to each load scenario

.30

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6.6.1.1.5 GHG BACT Limit: 1. 3 6 lb/hp

- hr ( 829 g/kW

- hr) of CO 2 e on a rolling

24

- hour average basis and 90,056.4 7 tons per year of CO 2 e on a rolling 12

- month basis. **

6.6.1.2 BACT Work Practice Standards:

6.6.1.2.1 Use of ultra low sulfur diesel

, and

6.6.1.2.2 Good combustion practices based on the current manufacturer’s

specifications for these engines, and additional enhanced work practice standards as detailed in the applicati on received (by EPA) on October 20, 2010; and application addendums received on February 11, 2011; October 27, 2011; and December 22, 2011, respectively. The application is provided in the administrative record and defines a detailed engine performance management system and the Diesel Engines with Turbochargers (DEWT) monitoring system design ed by Transocean. A parametric monitoring system equivalent to DEWT may be used with prior EPA approval.

6.6.1.3 Compliance Demonstration Method for units EU

- 01 D through

- 08 D : Pursuant

to Condition 6. 9 , t he permittee shall monitor emissions by the use of an EPA

approved continuous emissions monitoring system, an EPA

- approved stack testing emissions monitoring system, or, with prior written approval by EPA, an alternative parametric monitoring method.

6.6.1.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6. 9 and 6.1 8

.

6.6.2 Source Identification: EU

- 009 D , mud and cement mixing, equipped with dust collectors.

6.6.2.1 PM/PM 10 /PM 2.5 BACT Emission Limit: 1.08 tons per year on a 12

- month rolling total basis.

6.6.2.2 BACT Work Practice Standard: Proper maintenance and operation of the dust collectors to ensure a control efficiency of 99.95%.

6.6.2.3 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 3 and 6.1 8

.

6.6.3 Source Identification: EU

- 010 D , mud degassing operat ions.

6.6.3.1 VOC BACT Emission Limit: 19.39 tons per year on a 12

- month rolling total

basis.

6.6.3.2 GHG BACT Emission Limit: 982.7 tons per year of CO 2 e on a 12

- month rolling

total basis. **31

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6.6.3.3 The permittee shall determine the water

- based mud/oil

- based mud ratio to

ensu re it does not exceed 2:5 based on a 12

- month rolling average.

6.6.3.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 4 and 6.1 8

.

6.6.4 Source Identification: EU

- 011 D , emergency generator engine, equipped with positive crankcase ventilation, turbocharger and aftercooler, and high

- pressure fuel injection with

aftercooler.

6.6.4.1 NO X BACT Emission Limit: 1.60 tons per year on a 12

- month rolling total

basis.

6.6.4.2 CO BACT Emission Limit: 0.37 ton s per year on a 12

- month rolling total basis.

6.6.4.3 VOC BACT Emission Limit: 0.04 ton s per year on a 12

- month rolling total

basis.

6.6.4.4 PM BACT Emission Limit: 0.05 ton s per year on a 12

- month rolling total basis.

6.6.4.5 PM 10 /PM 2.5 BACT Emission Limit: 0.03 ton s per year on a 12

- month rolling

total basis.

6.6.4.6 GH G BACT Emission Limit: 77.84 tons per year of CO 2 e on a 12

- month rolling

total basis. **

6.6.4.7 BACT Work Practice Standards:

6.6.4.7.1 Use of ultra low sulfur diesel fuel

, and

6.6.4.7.2 G ood combustion practices based on the current manufacturer’s

specifications for this engine.

6.6.4.8 Operating Limit: This unit shall be operated no more than 60 hours per year on

a 12

- month rolling total basis.

6.6.4.9 Compliance with this operating limit will be assured by maintaining a record of hours of operation and summing such hours on a rolling 12

- month basis.

6.6.4.10 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.32

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- M 2 0 5 / 23 /2013 6.6.5 Source Identification: EU

- 012 D through

- 015 D , cementing engines, cementing nitrogen pump engine, and cement batch mixer engine, equipped with closed crankcase ventilation, turbocharger (without aftercooler), and high

- pressure fuel injection with

aftercooler.

6.6.5.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from the engines combined in exces s of:

6.6.5.1.1 NO X BACT Emission Limit: 9.50 tons per year on a 12

- month

rolling total basis.

6.6.5.1.2 CO BACT Emission Limit: 3.73 tons per year on a 12

- month rolling

total basis.

6.6.5.1.3 VOC BACT Emission Limit: 0.5 7 ton per year on a 12

- month

rolling total basis.

6.6.5.1.4 PM BACT Emi ssion Limit: 0.41 ton per year on a 12

- month rolling

total basis.

6.6.5.1.5 PM 10 BACT Emission Limit: 0.25 ton per year on a 12

- month

rolling total basis.

6.6.5.1.6 PM 2.5 BACT Emission Limit: 0.25 ton per year on a 12

- month

rolling total basis.

6.6.5.1.7 GHG BACT Emission Limit: 715 .5 tons per year of CO 2 e on a 12

-

month rolling total basis. **

6.6.5.2 BACT Work Practice Standards:

6.6.5.2.1 Use of certified EPA Tier 1 Marine engines for EU

- 012 D and

-

013 D , Tier 1 Non r oad ( or better) for EU

- 014 D , and Tier 2 Non r oad engine for EU

- 015 D ;

6.6.5.2.2 Use of ultra low sulfur diesel fuel; and

6.6.5.2.3 G ood combustion practices based on the current manufacturer’s

specifications for these engines.

6.6.5.3 Operating Limit: Units EU

- 012 D and

- 013 D shall be operated no more than 1,200 hours per year combined on a 12

- month rolling total bas is.

6.6.5.4 Operating Limit: Unit EU

- 014 D shall be operated no more than 100 hours per year on a 12

- month rolling total basis.

6.6.5.5 Operating Limit: Unit EU

- 015 D shall be operated no more than 6 00 hours per year on a 12

- month rolling total basis.33

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6.6.5.6 Compliance with th e se operating limit s will be assured by maintaining a record

of hours of operation and summing such hours on a rolling 12

- month basis.

6.6.5.7 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.6.6 Source Identification: EU

- 016 D

, - 017 D

, - 019 D , and

- 020 D ; wireline unit engines (including primary, alternative #2, and power plant generator, and hydraulic generator), equipped with turbocharger and aftercooler (EU

- 016 D and

- 017 D only), and high

pressure fuel inj ection with aftercooler.

6.6.6.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from the engines combined in excess of:

6.6.6.1.1 NO X BACT Emission Limit: 8.92 tons per year on a 12

- month

rolling total basis.

6.6.6.1.2 CO BACT Emission Limit: 2.90 tons per year on a 12

- month rolling

total basis.

6.6.6.1.3 VOC BACT Emission Limit: 1.17 tons per year on a 12

- month

rolling total basis.

6.6.6.1.4 PM/PM 10 /PM 2.5 BACT Emission Limit: 0.60 ton s per year on a 12

-

month rolling total basis.

6.6.6.1.5 GHG BACT Emission Limit: 536.6 tons per year of CO 2 e on a 12

-

month rolling total basis. **

6.6.6.2 BACT Work Practice Standards:

6.6.6.2.1 Use of certified EPA Tier 2 Non r oad (or better) engines for

EU

- 019 D and

- 020 D and Tier 3 Non r oad (or better) engines for

EU

- 016 D and

- 017 D ;

6.6.6.2.2 Use of ultra low sulfur diesel fuel ; and

6.6.6.2.3 G ood combustion practices based on the current manufacturer’s

specifications for these engines.

6.6.6.3 Operating Limit: Units EU

- 016 D and

- 017 D shall be operated no more than 1,500 hours per year combined on a 12

- month rolling total basi s.

6.6.6.4 Operating Limit: Unit EU

- 019 D shall be operated no more than 1

, 700 hours per year on a 12

- month rolling total basis.

6.6.6.5 Operating Limit: Unit EU

- 020 D shall be operated no more than 1

, 300 hours per year on a 12

- month rolling total basis.34

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6.6.6.6 Compliance with th ese operating limit s will be assured by maintaining a record

of hours of operation and summing such hours on a rolling 12

- month basis.

6.6.6.7 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.6.7 Source Identification: EU

- 021 D , fast rescue craft engine, equipped with turbocharger (without aftercooler).

6.6.7.1 Work Practice Standards:

6.6.7.1.1 Use of ultra low sulfur diesel fuel

, and

6.6.7.1.2 G ood combustion practices based on the current manufacturer’s

specifications for this engine.

6.6.7.2 Operating Limit: This unit shall be operated no more than 25 hours per year on

a 12

- month rolling total basis.

6.6.7.3 Compliance with th ese operating limit s will be assured by maintaining a record

of hours of operation and summing such hours on a rollin g 12

- month basis.

6.6.7.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.6.8 Source Identification: EU

- 022 D through

- 025 D , life boat engines.

6.6.8.1 Work Practice Standards:

6.6.8.1.1 Use of ultra low sulfur diesel fuel

, and

6.6.8.1.2 G ood combustion practices based on the current manufacturer’s

specifications for these engines.

6.6.8.2 Operating Limit: These units shall be operated no more than 25 hours per year

each on a 12

- month rolling total basis.

6.6.8.3 Compliance with th ese operating limit s will be assured by maintaining a record

of hours of operation and summing such hours on a rolling 12

- month basis.

6.6.8.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 0 and 6.1 8

.

6.6.9 Source Identification: EU

- 026 D thro ugh

- 047 D and EU

- 078 D through

- 081 D , storage
tanks.

6.6.9.1 The permittee shall not discharge or cause the discharge of emissions into the atmosphere from the storage tanks combined in excess of:35

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6.6.9.1.1 VOC BACT Emission Limit: 0.44 ton s per year on a 12

- month

rolling total basis.

6.6.9.2 BACT Work Practice Standard: Use of good maintenance practices.

6.6.9.3 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 1 and 6.1 8

.

[40 CFR §§ 52.21, 71.6(a)(1), (a)(3) and (c)(1) , and 55.8 ]

6.6.10 Source Identi fication: EU

- 082, flaring operations.

6.6.10.1 NO X BACT Emission Limit: 0.03 tons per year on a 12

- month rolling total

basis.

6.6.10.2 CO BACT Emission Limit: 0.18 tons per year on a 12

- month rolling total basis.

6.6.10.3 VOC BACT Emission Limit: 0.07 tons per year on a 12

- month rolling total

basis.

6.6.10.4 GHG BACT Emission Limit: 64.72 tons per year of CO 2 e on a 12

- month rolling

total basis. **

6.6.10.5 BACT Work Practice Standard s :

6.6.10.5.1 Use of propane fuel for testing

.

6.6.10.5.2 Good combustion practices and proper flare maintenance.

6.6.10.6 Operating Limit s : Non

- emergency flaring shall be limited to 5 minutes per day

and 274 days on a 12

- month rolling total basis.

6.6.10.7 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.15 and 6.18.

6.6.11 Source Identification: EU

- 083, welding operati ons.

6.6.11.1 PM/ PM 10 /PM 2.5 BACT Emission Limit: 0.02 tons per year on a 12

- rolling total

basis.

6.6.11.2 BACT Work Practice Standard: Best management practices to include:

6.6.11.2.1 M aintaining an accurate account of the quantity of welding rods

used.

6.6.11.2.2 Following manufacturer’s recommendations for all equipment used

in welding operations, including voltage levels.

6.6.11.3 Operating Limits: Total welding rods used shall be limited to 700 pounds per year of Type E6010 (or equivalent) and 1100 pounds per year of Type E7018 (or equivalent) on a 12

- month rolling total basis.36

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6.6.11.4 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 6 and 6.18.

6.6.12 Source Identification: EU

- 084, painting operations.

6.6.12.1 VOC BACT Emission Limit: 4.79 tons per year on a 12

- month roll ing total

basis

6.6.12.2 PM/PM 10 /PM 2.5 Emission Limit: 1.96 tons per year on a 12

- month rolling total

basis.

6.6.12.3 BACT Work Practice Standards:

6.6.12.3.1 Best management practices to include: use of low

- VOC coatings, use

of drip pan and drop cloth in mixing / painting areas, and proper storage of coatings (and thinners) in non

- leaking containers.

6.6.12.3.2 Use of only brushes and rollers for coating applications.

6.6.12.4 Operating Limits: Total coating and thinner usage shall be limited to 1825 and 480 gallons per year, respectively, on a rollin g 12

- month total basis.

6.6.12.5 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.1 7 and 6.18.

6.6.13 Source Identification: EU

- 085 through

- 087, seismic operations engines equipped with turbochargers and aftercoolers

.

6.6.13.1 The p ermittee shall not discharge or cause the discharge of emissions into the atmosphere from the engines combined in excess of:

6.6.13.1.1 NO X BACT Emission Limit: 3.54 tons per year on a 12

- month

rolling total basis.

6.6.13.1.2 CO BACT Emission Limit: 1.94 tons per year on a 12

- month rolling

total basis.

6.6.13.1.3 VOC BACT Emission Limit: 6.67 tons per year on a 12

- month

rolling total basis.

6.6.13.1.4 PM/PM 10 /PM 2.5 BACT Emission Limit: 0.11 tons per year on a 12

-

month rolling total basis.

6.6.13.1.5 GHG BACT Emission Limit: 384.97 tons per year on a 12

- mon th

rolling total basis. **37

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6.6.13.2 BACT Work Practice Standards:

6.6.13.2.1 Use of certified EPA Tier 2 Nonroad (or better) engines.

6.6.13.2.2 Use of ultra low sulfur diesel fuel; and

6.6.13.2.3 Good combustion practices based on the current manufacturer’s

specifications for these engines.

6.6.13.3 Operating Limit: These engines shall be operated no more than 540 hours per

year each on a 12

- month rolling total basis.

6.6.13.4 Compliance with the operating limit will be assured by maintaining a record of hours of operation and summing such hours on a rolling 12

- month basis.

6.6.13.5 Monitoring, recordkeeping and reporting shall be conducted in accordance with

Conditions 6.10 and 6.18.

6.7 Work Boat Operating Limits

6.7.1 The vessel Allie or substitute work boats (with eq uivalent or lower potential emissions), used in any combination with in 25 nautical miles of the C.R. Luigs or DD1 , shall not

exceed a combined total of 7,500 operating hours per year on a rolling 12

- month total

basis.

6.7.2 Utilized work boats shall not combust any diesel fuel with sulfur content greater than

15 ppm by weight.

6.7.3 Compliance with this operating limit will be demonstrated through the monitoring, recordkeeping and reporting conditions as set forth in Conditions 6.1 2 and 6.1 8

.

[40 CFR §§ 52.21, 55.2, 55.6(a)(4) , 55.8, and 71.6(a)(1), (a)(3) and (c)(1)]

6.8 Crew Boat Operating Limits

6.8.1 The vessel Fast Skipper or substitute crew boats (with equivalent or lower potential emissions), used in any combination within 25 nautical miles of the C.R. Luigs or DD1

, shall not exceed a combined total of 800 operating hours per year on a rolling 12

- month

total basis.

6.8.2 Utilized crew boats shall not combust any diesel fuel with sulfur content greater than

15 ppm by weight.

6.8.3 Compliance with this operating limit will be demonstrated through the monitoring, recordkeeping and reporting conditions as set forth in Conditions 6.1 2 and 6.1 8

.

[40 CFR §§ 52.21, 55.2, 55.6(a)(4)

, 55.8 and 71.6(a)(1), (a)(3) and (c)(1)]38

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6.9.1 Compliance demonstration method for t he main generator diesel units EU

- 001 L through

- 008 L on the C.R. Luigs and EU

- 001 D through

- 008 D on the DD1 : In accordance with

Conditions 6.5.1. 3 and 6.6.1. 3 , the permittee shall monitor NO X , CO, VOC, CO 2 , and

PM/PM 10 /PM 2.5 emissions from the main engines by the use of an EPA

- approved parametric monitoring method as described in Condition 6. 9 .1.1 , or an EPA

- approved continuous emissions monitoring system described in Condition 6. 9.1.2

, or, with prior written approval by EPA, a stack testing emissions monitoring system as described in

Condition 6. 9 .1.3 , or with prior written approval of EPA, a combination of these

methods

.

6.9.1.1 Parametric Monitoring

6.9.1.1.1 The permittee shall properly monitor NO X , CO, VOC, CO 2 , and

PM/PM 10 /PM 2 .5 emissions from the main generator diesel units specified in Condition 6. 9 .1 by using a parametric monitoring system

such as the T ransocean Die s el Engines wi th Tur bochargers (DEWT) monitoring system or an equivalent system upon prior written approval by EPA.

6.9.1.1.2 The permittee shall monitor and record the following parameters

once every 30 seconds for 30 minutes twice a day:

 Charge Air Pressure (bar) before and after air cooler;

 Charge Air Temperature (Celsius) before and after air cooler;

 Turbocharger RPM A&B (RPM);

 Exhaust Air Temperature (Celsius);

 Engine Air Inl e t Pressure (mbar);

 Engine Air Inlet Temperature (Celsius);

 Engine Air Inlet Relative Humidity (%);

 Generator Load (kW); and

 NO X , CO, SO 2 , CO 2 , PM/PM 10 /PM 2.5 , and O 2 Emis sion Concentration (ppm).

6.9.1.2 Continuous Emissions Monitoring

6.9.1.2.1 The permittee shall properly install, maintain in good working order,

and operate a continuous emissions monitoring system to monitor

emissions from the main generator diesel units specified in

Condition 6. 9 .1.

6.9.1.2.2 The permittee shall obtain stack gas volumetric flow rates using a

calibrated flow monitor that records data on a continuous basis.

6.9.1.2.3 The permittee shall monitor and record engine electric power output

in kW

- hr.39

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6.9.1.2.4 The permittee shall install, calibrate and maintain the continuous

emissions monitoring system with a plan approved by EPA.

6.9.1.2.5 The quality assurance plan used by the permittee for the certification

and operation of the continuous emissions monitoring system shall

be made availa ble to EPA upon request.

6.9.1.2.6 The permittee shall demonstrate compliance based on a 24

- hour

period.

6.9.1.3 Stack Testing Emissions Monitoring

6.9.1.3.1 The permittee shall properly monitor NO X , CO, VOC, CO 2 , and

PM/PM 10 /PM 2.5 emissions from diesel units specified in Conditi on
6. 9 .1 by using stack testing data collected according to an EPA approved protocol and in accordance with Condition s 5.26 and

6.9 .1.3 .1.1 to 6.9.1.3 .1.4, to prepare a graph of engine load versus emission rates expressed in grams per kilowatt

- hour (g/kW

- h r) for each engine. Plot the engine load as the independent (or x) variable and the pollutant emission rates as the dependent (or y) variable for each load point tested. Construct the graph by drawing straight

- line segments between each load point. Draw a horizontal line to the y

axis from the minimum load point tested.

6.9.1.3.1.1 Within 90 days of the start of the drilling campaign, the

main generator diesel units of the MODU that will be in operation under this permit, EU

- 001 L through

- 008 L on the C.R. Luigs or EU

- 001 D through

- 008 D on the DD1, shall be stack tested under the requirements of this section. Data collected prior to issuance of this permit may be used with EPA approval

.

6.9.1.3.1.2 Each stack test shall be conducted at three different

load s within the expected range of operations.

6.9.1.3.1.3 At a minimum, each stack test run shall test for

emissions of CO, NO X , PM 2.5 , PM 10 , VOC, CO 2, and

visible emissions.

6.9.1.3.1.4 During each test run, the permittee shall monitor and

record the following information:

 Density of the fuel used (in lbs/gallon);

 Heat content of the fuel used (in Btu/gallon); and

 Electrical power produced (in kW

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6.9.1.3.2 Use the load inform ation recorded per Condition 6.9 .1.3 .1 ., along

with the graph of engine load versus emission rates to determine the emission rate in g/kW

- hr for each engine load recorded. Linear interpolation shall be used to determine the emission rate when the actual load falls between two tested load points When the engine load exceeds the maximum load measured during the stack testing, report the g/kW

- hr emission rate obtained for the highest load point tested during the most recent stack test. Calculate the average emission rate for each hour of operation from all the individual emission rate results recorded during t he hour.

6.9.1.3.3 When records of engine load are not available, substitute the highest

g/kW

- hr emission rate calculated for all the load points tested during

the most recent stack test.

6.9.1.3.4 Determine the average emission rate (g/kW

- hr) for each unit from

the hourly emission rate results in each rolling 24

- hour period.

[40 CFR §§ 52.21

, and 71.6(a)(1), (a)(3) and (c)(1)]

6.10 Monitoring and Recordkeeping Requirements for Emergency Generators and Small Onboard Engines

Compliance demonstration method for the emergency gener ator diesel units (EU

- 015 L on C. R. Luigs and EU

- 011 D on DD1 ) and the small on

- board diesel engines (EU

- 009 L through

- 012 L

, - 016 L

, - 0 17 L

, - 019 L through

- 028 L , and

- 092 L on C.R

. Luigs and EU

- 012 D through

- 017 D

,

- 019 D through

- 025 D , and

- 085 through

- 087 on DD1 ): In accordance with Conditions 6.5.2, 6.5.5 through 6.5. 10 , and 6.6.4 through 6.6.8, and 6.6.13, the permittee shall monitor and maintain a contemporaneous record of the following information:

 Unit ID;

 Date/time engine started;

 Date/time engine shut down;

 Name of person operating equipment (printed); and

 Signature of person operating equipment.

[40 CFR §§ 52.21 , 55.8, and 71.6(a)(1), (a)(3) and (c)(1)]

6.11 Monitoring and Recordkeeping Requirements for Storage Tanks

6.11.1 Compliance with applicable operating limits in Conditions 6.5.1 1 and 6.6.9 will be assured by using EPA’s TANKS 4.0.9d program.

6.11.2 The permittee shall monitor and maintain the following information:

 Unit ID; and

 The dimensions and capacities of units EU

- 029 L through

- 059 L and EU

- 090 L through

- 091 L on C.R. Luigs and EU

- 026 D through

- 047 D and EU

- 078 D through

- 081 D on DD1 . These records shall be kept for the life of the unit.

[40 CFR §§ 52.21 , 55.8, and 71.6(a)(1), (a)(3) and (c)(1)]41

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- M 2 0 5 / 23 /2013 6.12 Monitoring and Recordkeeping Requirements for Support Vessel Engines

6.12.1 Compliance demonstration method for the support vessels for both C.R. Luigs and DD1

, in accordance with Conditions 6.7 through 6.8, the permittee shall monitor and maintain a contemporaneous record of the following information:

6.12.1.1 Compliance with th is operating limit will be assured by maintaining a record of operating time and diesel fuel use within the 25

- nautical mile radius of the C.R. Luigs or DD1 and during standby time at the C.R. Luigs or DD1

.

6.12.1.2 The permittee shall show compliance by determini ng and recording the sulfur content upon receiving each fuel shipment as specified in Condition 6.4.

6.12.2 Monitoring and Recordkeeping Requirements: The permittee shall monitor and maintain a contemporaneous record with the following information:

 Date/time entering the 25 nautical mile radius;

 Date/time exiting the 25 nautical mile radius;

 Sulfur content of all fuel used in any engine as specified in Condition 6.4;

 Gallons of diesel fuel on the support vessel entering the 25 nautical mile radius; and

 Gallons of diesel fuel on the support vessel exiting the 25 nautical mile radius.

 Gallons of diesel fuel loaded on to the support vessel within the 25 nautical mile

radius.

[40 CFR §§ 52.21, 55.2, 55.6(a)(4) , 55.8, and 71.6(a)(1), (a)(3) and (c)(1)]

6.13 Monitoring an d Recordkeeping Requirements for Mud and Cement Mixing Operations

6.13.1 Compliance with Conditions 6.5.3.1 and 6.5.3.2 ( for EU

- 013 L ) will be assured by maintaining a constant minimum air supply pressure reading (at the cyclone

- filter pressure regulator gauge) of 65 psig. The permittee shall monitor and record this reading at least daily to ensure a pressure drop of no more than 4 psig when the system pulses.

6.13.2 Compliance with Conditions 6.6.2.1 and 6.6.2.2 (for EU

- 009 D ) will be assured by complying with manufact urer specifications including maintaining the minimum air supply pressure reading specified by the manufacture r (not to exceed 78 psi a )

. The permittee shall monitor and record this reading at least daily.

[40 CFR §§ 52.21 , 55.8 and 71.6(a)(1), (a)(3) and (c)(1)]

6.14 Monitoring and Recordkeeping Requirements for Mud Degassing Operations

Compliance with Conditions 6.5.4.1, 6.5.4.2, 6.5.4.3, 6.6.3.1, 6.6.3.2 , and 6.6.3.3 (for EU

- 014 L

and EU

- 010 D , respectively) will be assured by monit oring and recording the daily throughput of

both water

- based and oil

- based mud.

[40 CFR §§ 52.21 , 55.8 and 71.6(a)(1), (a)(3) and (c)(1)]42

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- M 2 0 5 / 23 /2013 6.15 Monitoring and Recordkeeping Requirements for Flaring Operations

Compliance with Conditions 6.6.10.1 through 6.6.10 .6 will be assured by monitoring and recording the date/duration of each flaring episode as well as the type of fuel burned.

[40 CFR §§ 52.21 , 55.8 and 71.6(a)(1), (a)(3) and (c)(1)]

6.16 Monitoring and Recordkeeping Requirements for Welding Operations

Compliance with Conditions 6.6.1 1 .1 through 6.6.1 1

. 3 will be assured by monitoring and recording the types and amounts (in pounds) of welding rods used on a daily basis

. [40 CFR §§ 52.21 , 55.8 and 71.6(a)(1), (a)(3) and (c)(1)]

6.17 Monitoring and Recordkeeping Requirements for Painting Operations

Compliance with Conditions 6.6.1 2 .1 through 6.6.1 2

. 4 will be assured by monitoring and recording the types and amounts (in gallons) of coatings and thinners used on a daily basis

. Also,

MSD S information for all coatings and thinners used must be kept on file.

[40 CFR §§ 52.21 , 55.8 and 71.6(a)(1), (a)(3) and (c)(1)]

6.18 Reporting Requirements

The permittee shall submit the information required in Conditions 6.2, 6.4

, and 6. 9 through 6.1 7 in

acc orda nce with reporting specifications detailed in Condition 5.17.

[40 CFR § 71.6(a)(3)(iii) and 55.8 ]

6.19 New Source Performance Standards and National Emission Standard for Hazardous Air Pollutants (HAP) Requirements

6.19.1 Cementing engines EU

- 016 L through

- 018 L and w ireline engines EU

- 019 L and

- 020 L on C.R. Luigs and cementing engines EU

- 012 D through

- 015 D and wireline engines EU

016 D and

- 017 D and seismic operations engines EU

- 085 through

- 087 on DD1 are subject to 40 CFR part 60, subpart IIII based on their pe r cylinder displacement and model year. The permittee shall demonstrate compliance with the applicable requirements through the following:

6.19.1.1 The permittee shall maintain documentation in accordance with Condition 5.16 that engines specified in Condition 6.1 9 .1 were installed and configured according to manufacturer’s specifications

.

6.19.1.2 The permittee shall maintain records in accordance with Condition 5.16 of manufacturer data indicating compliance with EPA Tier 2 or Tier 3 standards.43

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6.19.1.3 The permittee shall opera te and maintain the engines according to the manufacturer's written instructions or procedures developed by the permittee that are approved in writing by the engine manufacturer. The permittee shall only change those settings that are approved by the manu facturer. The permittee shall maintain records of the manufacturer’s written instructions for operation and maintenance of the engine or the procedures the permittee developed that are approved in writing by the manufacturer in accordance with Condition 5. 16

.

6.19.1.4 The permitted engines shall not combust any diesel fuel that does not meet the requirements of Condition 6.4.

[40 CFR § 60 subpart IIII and 55.8 ]

6.19.2 Any new, modified or reconstructed engine that trigger s 40 CFR part 60, subpart IIII applicability will comply with 40 CFR part 60, subpart IIII or obtain a technical exemption under 40 CFR § 55.7.

[40 CFR § 60 subpart IIII and 55.7]

6.19.3 Based on engine model years and engine use (summarized in Table s 1 and 2 of

Section 4 ), all diesel engines on C.R. Luigs and DD1 (with the exception of: EU

- 01 6 L through

- 020 L

, - 024 L through

- 028 L

, - 060 L , and

- 061 L on C.R. Luigs and EU

- 01 2 D through

- 017 D

, - 021 D through

- 025 D

, - 048 D

, - 049 D , and

- 085 through

- 087 on DD1 ) are subject to and shall comply with the applicable requirements of 40 CFR part 63, subpart

ZZZZ.

6.19.3.1 Existing stationary engines located at an area source of HAP emissions must comply with the applicable requirements in Table s 1b

, 2b , and 2d in subpart ZZZZ no later than May 3, 2013 in accordance with the compliance schedule requirem ents of Condition 5.22.

6.19.3.2 Compliance with any applicable numerical emission limitation established in subpart ZZZZ is based on the results of testing the average o f three 1

- hour runs using the testing requirements and procedures in 40 CFR § 63.6620.

6.19.3.3 Compliance with Condition 6.1 9

. 3 shall be determined based upon recordkeeping required by the Annual Compliance Certification set forth in

Condition 5.21.

[40 CFR part 63, subpart ZZZZ and 55.8 ]

6.19.4 The permittee shall submit to EPA prior notification of any upgrades to or replacements of diesel units specified in Tables 1 and 2 of Section 4 in addition to a reevaluation of the applicability of pertinent NESHAP and NSPS reg ulations for the modified diesel unit.

[40 CFR §§ 71.6(a)(1), (a)(3) and (c)(1)]44

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- M 2 0 5 / 23 /2013 6.19.5 The permittee shall maintain records of the certifications of all diesel units specified in

Tables 1 and 2 of Section 4

. [40 CFR §§ 71.6(a)(1), (a)(3) and (c)(1)]

** The emission factors for CH 4 and N 2 O are based on Inventory of U.S. Greenhouse Gases and Sinks: 1990

- 2008 (April 2010) , U.S. EPA # 430

- R

- 10

- 006, Annex 3, Table A

- 81. The emission factor for CO 2 e has been calculated using the GWPs obtained from 40 CFR 98, subpart A (as of

December 29, 2009)

.