In Raply Refer Tot FO-2-1

i«all-Koustc. 012 Company At tentat Ha. Kathy Caup 700 Loulalana, Sulta 2610 Houaton, Texan 7700?

Cantlerens

Koferenca la uade to your In i t ia l I-eve* ope .ant Operations Coordination 'tooiuaent (DOCD) and accocpeny.nr Ir.rortwhtlon reoaiveo iJovanber 1%, 19«9, for Laaaa bOW, Plook ai;, i raiW Xala araa. Thla DOCD litoludaa tha activitiaa proposa,: Tor Pla.fon. k and Velio Hot. 1 , 2 , and 3.

In accordance uith 30 CFfc 2 S0.3*. thla DOCD is haraby deauec nut ult tod and la now bein,- considered for approval.

lour cor.trol numbar la H-3b1«j and should ba referenceC in yaur ccKruni-cufcioi. ant eor oapononce concerning tnlr DOCD.

Sincerely,

n (Or*. Sfld.) A. Donald Giroir p. J . dourgeola Regional Supervlaor Field Operationa

boot Laaaa OCS- 1 5659 (OPS-3-2) (FILE R00H) / OP S-3—* w/Public Info. Copy of tba DOCD ( and acoonp. info. (PUBLIC RECORDS)

MJTolbert tooki 11/20/d9idc«dooi»-bkp.

omeaot

HALL-HOUSTON OIL COMPANY 700 louwana. Swu W10/Houttor T H M 77008

C713)880-0711

November 13, 1989 rVn.W5.7800

Mr. Daniel J . Bourgeois Regional Supervisor, F i e l d Operationa U . S . Department of the Interior Minerals Management Service 1201 Elmwood Park Boulevard New Orleana, Louisiana 70123-2394

Attontion: FO-2-1

RE: I n i t i a l Development Operations Coordination Document OCS-G 5659, BlocJc 82 Grand lale Area Offshore Louisiana

Gentlemen:

Enclosed pleaae f ind nine (9) copies of the I n i t i a l Development Operationa Coordination Document (DOCD) with aasociated Environ­mental Report and Air Quality Review for Lease OCS-G 5659, Grand I s l e Block 82. Five (5) copies of the subject report are for "Proprietary" information purposes and four (4) copies contain "Public Information"; a l l copies being marked accox : ly.

Excluded from the Public Information copies are certain geologic discuss ions , depth of wel ls and structure map.

Hall-Houston Oi l Company anticipates commencing development operations with the commencement of production on June 15, 1990. Should further information be reguired, please contact the underaign ad.

S incere ly ,

Manager, Regulatory A f f a i r s

KC[ 82~OCD.TXT] enclosures

"Public Information*

COASTAL ZONE MANAGEMENT

CONSISTENCY CERTIFICATION

INITIAL DEVELOPMENT OPERATIONS COORDINATION DOCUMENT

GRAND ISLE AREA. BLOCK 82

OCS-G 5659

The proposed a c t i v i t i e s described in d e t a i l in this Plan comply with Louisiana'a approved Coaatal Zone Management Program and w i l l be conducted in a manner consistent with such Program.

Arrangements have been made with the State-Times in Baton Rouge, Louis iana, to publish a public notice of the proposed a c t i v i t i e s no la ter than November 27, 1989. Additionally, arrangements have been made with The Dai ly Comet in Lafourche Pariah to publish a publ i c notice of the proposad ae t iv i t i ea no later than November 27, 1*89.

November 13. 1989 Date

INITIAL DEVELOPMENT OPERATIONS COORDINATION DOCUMENT

GRAND ISLE AREA, BLOCK 82

OCS-G 5659

Hall-Houston O i l Company (Hall-Houston) as Operator of the subject block, submits this proposed I n i t i a l Development Operations Coordination Document (DOCD) in accordance with the regulations contained within T i t l e 30 CFR 250.34, as f o i l owe t

1. Brief History to Date

Under an I n i t i a l Plan of Exploration submitted by Areo O i l & Gas, Hall-Houston O i l Company d r i l l e d and subsequently temporarily abandoned Wells No. 1, 2 and 3.

2. Description and Schedule of Operations

A total of three (3) wells w i l l be involved in the development and production a c t i v i t i e s for Grand I s l e Area Block 82.

Under this DOCD, Hall-Houston O i l Company i s proposing to ins ta l l a 4-pi le production platform (to be designated "A") (see Attachment I , Platform Elevation Drawing) over temporarily abandoned Wells No. 1, 2 and 3.

Production from Platform A w i l l be processed at the proposed A platform then transported to sales v ia right-of-way pipelines to ex i s t ing pipelines in or near Grand I s l e Block 82.

The following schedule details the chronological order of the proposed events leading to f u l l production:

Activity Approximate Date

1. Install Platform "A" (jacket only) Dece...*>er 15, 1989

2. Re-enter and complete Wells 1,2,3 December 20, 1989

3. Insta l l p ipel ine March 1, 1990

4. Insta l l deck and f a c i l i t i e s May 1, 1990

5. Commence production June 15, 1990

HALL-HOUSTON OIL COMPAN* I n i t i a l DOCD Grand lale 82

Page 2

3. Completion Equipment

The existing wel1. .«? will be completed with a jackup rig. When a rig is selected, "he rig specs w i l l be made a part of the Sundry Notice ro R -enter and Complete said wells. Typical diverter and schematics are enclosed herewith aa Attachment I I . ,-uiy rig utilized by Hall-Houston Oil Company will be designed, operated and maintained in accordance with 30 CFR 250.40 (b)(4).

Pollution prevention features will include a d r i l l floor containment system with collection tank in hull.

Safety features w i l l include well control and blowout preven­tion eguipment as described in 30 CFR 250, Subpart D. Hall-Houston Oil Company will perform a l l operations in a aafe and workmanlike manner and wi l l maintain a l l equipment in a aafe condition, thereby ensuring the protection of lease and associated fa c i l i t i e s , the health and aafety of a l l persons, and the preservation and conservation of property and the environment. The appropriate li f e rafts, l i f e jackets, ring buoys, etc., as prescribed by the U.S. Coast Guard, will be maintained on the fa c i l i t y at a l l times.

4. Platform and Production Equipment

Platform "A" shall be designed, fabricated, installed, inspected, and maintained in accordance with a l l the require­ments of 30 CFR 250.130 (b), under the provisions of the "Requirements for Verifying the Structural Integrity of OCS Platforms".

Pollution prevention features will include the installation of curbs, gutters, drip pans, and drains in deck areaa in a manner necessary to collect a l l contaminants not authorized for discharge. Oil drainage will be piped to a properly designed, operated, and maintained sump system which will automatically maintain the o i l at a level sufficient to prevent discharge of oil into offshore watera. All gravity drains shall be equipped with a water trap or other means to prevent gas in the sump system from escaping through the draina. Sump piles shall not be used as processing devices to treat or skim liquids but may be used to collect treated-produced water, treated-produced aand, or liquids from drip pans and deck drains and aa a final trap for hydrocarbon

HALL-HOUSTON OIL COMPANY I n i t i a l DOCD G r a n d I s l e 82

Page 3

liquids i n the event of equipment upsets. Improperly designed, operated or maintained sump p i l e s which do not prevent the discharge of o i l i n t o offshore waters s h a l l be replaced or repaired.

Production s a f e t y equipment s h a l l be designed, i n s t a l l e d , used, maintained, and tested i n a manner t o assure the safety and protection of the human, marine, and coastal environments i n accordance w i t h 30 CFR 250 Subpart H. Hall-Houston O i l Company w i l l perform a l l i n s t a l l a t i o n and production opera­tions i n a safe and workmanlike manner, and w i l l maintain a l l equipment i n a safe condition, thereby ensuring the protec­t i o n of lease and associated f a c i l i t i e s , the health and safety of a l l persons, and the preservation and conservation c f property and the environment. The appropriate l i f e r a f t s , l i f e jacket.':, r i n g buoys, etc., as prescribed by the U.S. Coast Guard, w i l l be maintained on the f a c i l i t y at a l l times.

A l l p l a t f orr* production f a c i l i t i e s s h a l l be protected w i t h a basic and a n c i l l a r y surface safety system designed, analyzed, i n s t a l l e d , t e s t e d , and maintained i n operating condition i n accordance w i t h the provisions of API RP 14C, Recommended Practice f o r Analysis, Design, I n s t a l l a t i o n and Testing of Basic Surface Safety Systems f o r Offshore Production P l a t ­forms.

Platform A w i l l be i d e n t i f i e d and reported i n accordance w i t h the requirements of the U.S. Coast Guard.

of the we xls d r i l l e d under the POE are as

5. Location of Wells

The location follows:

No. 1 (A-l) - SL: BHL:

No. 2 (A-2) - SL: BHL:

No. 3 (A-3) - SL: BHL:

1102' FSL/2229' FEL

1102' FSL/2225' FEL

1110' FSL/2229' FEL

TOTAL DEPTH TVD: 10116' MD:

TVD: 10139' MD:

TVD: 'i965' MD:

"Public Information

HALL-HOUSTON OIL COMPANY I n i t i a l DOCD Grand I s l e 82

Page 4

Grand I s l e Block. 82 i s located approximately 40 miles south o f the Louisiana c o a s t l i n e . The water depth i n Block 82 i s approximately 200 f e e t . See Attachment I I I , Bathymetry Map, f o r the loca t ion of the ex i s t i ng w e l l s and proposed p l a t f o r m .

6. Onshore F a c i l i t i e s and Transportat ion

The service base f o r t h i s area w i l l be located i n Fourchon, Louisiana. This w i l l be an es tabl ished f a c i l i t y tha t w i l l requi re no m o d i f i c a t i o n s . Transpor ta t ion from the e x i s t i n g onshore f a c i l i t i e s t o the block w i l l involve the use of one supply boat making seven (7) t r i p s pe*- week, one crew boat making ten (10) t r i p s per week and one r s l i cop te r making one (1) t r i p per week during comp I r-t ior operat ions. I t i s estimated one se rv ice boat w i l l be making seven (7) t r i p s per week during p roduc t ion operations w i t h one he l icop te r making two (2) t r i p s per week.

Enclosed herewith as Attachment IV , i s a map showing the lease r e l a t i v e t o the shoreline dep ic t ing the proposed t ranspor ta t ion r o u t e ( s ) . The boats w i l l normally move to Block 82 via the most d i r e c t -oute from Fourchon, Louisiana. The helicopter w i l l normally take the most d i r e c t route of t r a v e l between the two points when a i r t r a f f i c and weather condit ions pe rmi t .

7. Geological/Geophysical Tnformation

Information on geo log ica l hazards and surface loca t ions r e l a t i v e tc anomalies was included i n the I n i t i a l Plan of Exploration f o r Block 82. Hall-Houston does not a n t i c i p a t e any problems w i t h che i n s t a l l a t i o n of a s t ruc ture at t h i s l oca t ion .

A structure map which i l l u s t r a t e s Hall-Houston's current i n t e r p r e t a t i o n o f Grand l a l e Area, Block 82 i s enclosed herewith as Attachment V.

"Public Informafeef

HALL-HOUSTON OIL COMPANY I n i t i a l DOCD Grand I s l e 82

Page 5

8. Pollution Prevention Information

A l l completion and production operations s h a l l be performed i n accordance w i t h industry standards t ' prevent p o l l u t i o n of the environment. Hall-Houston's O i l S p i l l Contingency Plan haa been approved by the MMS. This plan designates an O i l S p i l l Team c o n s i s t i n g of Hall-Houston's personnel and contract personnel. This team's duties are to eliminate the source of any s p i l l , remove a l l sources of possible i g n i t i o n , deploy the most r e l i a b l e means of available transportation to monitor the movement of a s l i c k , and contain and remove the s l i c k , i f possible.

Hall-Houston i s a member of Clean J u l f Associates (CGA). The CGA has two permanent equipment bases i n Texas, at Port Aransas and Galveston, and four bases i n Louisiana, at Venice, Grand I s l e , Intracoastal C i t y , and Cameron. Each base is equipped w i t h fast response skimmers and there i s a barge mounted high volume open sea skimmer based at Grand I s l e , Louisiana. I n addition t o providing equipment, the CGA also supplies a I v i s o r s for clean-up operations. Equipment available from CGA and tbe base i t i s located at i s l i s t e d i n the CGA Manual, Volume I , Section I I I .

Estimated response time for a s p i l l i n Grand I s l e Block 82 during normal weather conditions could vary from 8 to 10 hours based on the following:

Hours Procurement and t r a v e l time f o r marine vessel, and i f necessary, motor vehicle to transport p o l l u t i o n containment equipment t o Hall-Houston's support base: 2.0 - 4.C

2. Load out of Fast Response Unit: 2.0

3. Travel ro GI 82 from nearest CGA Base located i n Grand I s l e , LA (40 miles a t 10 MPH) 4.0

Estimated T o t a l Time 8.0 - 10.0

Hall-Houston Oil Company I n i t i a l DOCD Grand Isle 82

Page 6

Equipment located a t Grand I s l o , Louisiana, would be u t i l i z e d f i r s t wi th a d d i t i o n a l eguipment t ransported from the nearest equipment base o n - s i t e as required.

I n the event a s p i l l occurs from Grand I s l e Area Block 82, our company has pro jec ted the p r o b a b i l i t y o f a s p i l l u t i l i z i n g i n f o r m a t i o n i n the Environmental Impact Statement (EIS) for OCS Lease Sales 123 and 125.

The EIS contains o i l s p i l l t r a j e c t o r y s imulat ions using seasonal surface cur ren ts coupled w i t h wind data , adjusted every 3 hours f o r 30 days or u n t i l a target i s contacted.

Hypothetical s p i l l t r a j e c t o r i e s were simulated f o r each of the po ten t i a l launch s i t es across the e n t i r e G u l f . These simulations presume 500 s p i l l s o c c u r i i n g i n each of the fou r seasons of the year . The r e su l t s i n the EIS were presented as p r o b a b i l i t i e s t ha t an o i l s p i l l beginning from a p a r t i c u l a r launch s i t e would contact a c e r t a i n land segment w i t h i n 3, 10, or 30 days. U t i l i z i n g the summary of the t r a j e c t o r y ana lys i s ( f o r 10 days) as presented on pages IV-36 through IV-39, the probable p ro jec ted land f a l l of an o i l s p i l l from Grand I s l e 82 i s as f o l l o w s . Also l i s t e d i s the CGA Hap Number corresponding to the land segment which w i l l be u t i l i z e d t o determine environmentally sens i t ive areas that may be a f f ec t ed by a s p i l l .

AREA LAND SEGMENT CONTACT _% CGA MAP NO.

Grand Isle 82 Teirebonne Ph., LA 22% LA Map No. 6 La Fourche Ph., LA 15% LA Map No. 6 Jeffersc l Ph., LA 2% LA Maps No.6/7 Plaquemines Ph., LA 3% LA Maps No.6/7

Section V, Volume I I of the CGA Manual containing maps as listed above, also includes equipment containment/cleanup protection response modes for the sensitive areas. Pollution response equipment available from CGA and i t s stockpile base i s listed in the CGA Manual Volume I , Section I I I .

Section VI, Volume I I of the CGA Operations Manual depicts the protection response modes that are applicable for o i l s p i l l clean-up operations. Each response mode is schematically represented to show optimum deployment and operation of the equip...ent in areas of environmental concern. Implementation of the suggested procedures assures the most effective use of the equipment and will result in reduced

Ha11-Houston Oil Company I n i t i a l DOCD Grand I s l e 82

Page 7

adverse impact of o i l s p i l l s on the environment. Supervisory personnel have the option to modify the deployment and operation of equipnent to more e f fec t ive ly respond to s i t e - spec i f i c circumstances.

9. Hew or Unusual Technology

Hail-Houston O i l Company does not intend to u t i l i z e any new or unusual technioues or technology while developing Grand I s l e 82.

10. Lease Stipulation(s)

Tlie f o. xowing measures have been or w i l l be .aken to sa t i s fy the requirements of the operational st ipulations appended to Lease OCS-G 5659, Grand I s l e Block 82:

Stipulation No. 1 - Protection of Archaeological Resources

Marine Technical Services conducted an High Resolution Geophysical Survey Report of the Grand I s l e Area, Blocks 81 and 82 during August 1987. The MMS reviewed and accepted t h i s report which complies with the provisions of NTL 75-3 (Revision No. 1) and NTL 83 i . The side scan sonar targets recorded several unidentif ied magnetic anomalies. There i s no evidence suggesting that the targets should merit considevation as c u l t u r a l resources. Although there are no anomalies within 500 feet of the proposed surface location. Hall-Houston O i l Company agrees that i f any s i t e , structure, or object of h i s t o r i c a l or archaeological s ignif icance should be discovered during any operation, the findings w i l l be immediately reported to the Regional Director and every reasonable e f for t w i l l be made to preserve and protect the c u l t u r a l resource from damage unt i l the Regional Director has given direction as to i t s preservation.

11. Eff luent Discharges

I t i s not expected that any l iqu id or so l id wastes, or pollutants w i l l be generated by offshore, onshore or trans­portation-related operations with the following exceptions. The discharge of wastewater result ing from offshore a c t i v i ­t i e s includes deck drainage, so l id wastes ( i . e . sanitary and domestic wastes), cooling water and desal inization unit discharges. Deck drainage w i l l consist of a l l waste resu l t ­ing from r a i n f a l l , rig/platform washing, deck washings, tank

Hall-Houston Oil Company I r i t i a l DOCD Grand I s l e 82

Page 8

cleaning operations, and runoff from curbs and gutters, including drip pans and work areas with an estimated volume range of 0 to 200 bbls/day. Sanitary and domestic wastes w i l l be processed on the rig and the resulting effluent w i l l be discharged into the Gulf with an estimated maximum of 1900 gallons/day flow, depending on the nuinber of inhabitants. Cooling water i s defined by the U.S. Environmental Protection Agency aa "noncontact" water used for cooling machinery, and desalinization discharges are these wastes resulting from ths creation cf freshwater from seawater. These discharges are r?.-lated by the U.S. ^—'ironmental Protection Agency through the National Pollutant Discharge Elimination System (NPDES) Permit.

Completion fluids w i l l be r*4.sposed of in accordance with applicable environmental regulations.

12. Hydrogen Sulfide

In accordance with 30 CFR 250.67(c), your letter dated August 25, 1989, granted approval of an I n i t i a l Plan of Exploration to Hall-Houstcn O i l Company foi Lease OCS-G 10869, NE/4 of Bloclc 82, Grand I s l e Area, and further c l a s s i f i e d the area in which the propoaed d r i l l i n g operations are to be conducted as a zone where the absence of hydrogen s u 1 ' a has been confirmed.

In addition, Hall-Houston did not encounter hydrogen sulfide while d r i l l i n g exploratory Wells 1, 2 and 3 in the S/2 of Grand lale block 82. Therefore, Hall-Houston O i l Company hreby requests determination be made by your office that our company wi l l be producing from a zone or zones where the -usence of hydrogen sulfide has been confirmed.

Encloaed are copies of the following infonnation:

ATTACHMENT NO.

Also enclosed i s the Air Quality Review and Environmental Report.

I I I

I I I IV V

Platform Elevation Drawing Rig Information Bathymetry Map Vicinity Map Structure Map

TYPICAL 4-PILE

Attachment I

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HALL-HOUSTON OIL COMPANY 700 lomfana. SuU 2610/Hou«on. T«««« 77002

(713) 22S-0711 F.« (713) 225-7600

November 13, 1989

State Times Legal Ad Department 525 Lafayette Street Baton Rouge, Louisiana 70604

Gentlemen:

Please publish the enclosed as a legal ad no later than November 27, 1989.

The invoice for said public notice should be sent to the attention of the Accounts Payable, Hall-Houston Oil Company, 700 Louisiana, Suite 2610, Houston, TX 77002.

A notarized affidavit ahould be sent to the attention of Kathy Camp at the above address.

Thank you for your consideration with this matter. If you have any guestions please contact the undersigned at 713/225-7623.

Sincerely,

Kathy Camp U Manager, Regulatory Affairs

KC

Public Notice of Federal Consistency Review of a Proposed Development Operations Coordination Document (DOCD)

by the Coastal Management Division/Louisiana Department of Natural Resources for the Plan's Consistency

with the Louisiana Coastal Resources Program.

Applicant: Hall-Houston O i l Company 700 Louisiana, Suite 2610 Houston, Texas 77002

Location: Grand I s l e Area, Block 82 OCS-G 5659, Offshore Louisiana

Description: Proposed DOCD for the above area provides for the development and production of hydrocarbons. Support a c t i v i t i e s are to be conducted from an onshore base located at Fourchon, LA. No ecological ly sensit ive species or habitats are expected to be located near or affected by these a c t i v i t i e s .

A copy of the plan described above i s avai lable for inspection at the Coastal Management Division Office located on the 10th Floor of the State Lands and Natural Resources Building, 625 North 4th S t r e e t , Baton Rouge, Louisiana. Office hours: 8 AM to 5:00 PM, Monday through Friday. The public i s reguested to submit com­ments to the Louisiana Department of Natural Resources Coastal Management Division, Attention OCS Plans, P.O. E x 44487, Baton Rouge, Louisiana 70804-4487. Comments .mist be received within 15 days of the date of t h i s notice or 15 days after the Coastal Management Section obtains a copy of the plan an i t i s avai lable for publ ic inspection. This public notice i s provided to meet the requirements of the NOAA Regulations on Federal Consistency with approved Coastal Management Programs.

HAIUHOUSTON OIL COMPANY 700 L o n W H . Suta 2610/HguMon. T I I M 770O?

November 13, 1989

7, Q|AjpfyjO#

(713) 22*0711 F.. (713) 225-7600

The D a i l y Comet 705 W. 5th Thibodaux, LA 70302

A t t e n t i o n : Doris Dome

Gentlemen:

Please publish the f o l l o w i n g as a lega l ad no l a t e r than November 27, 1989.

The invo ice fo r sa id pub l i c not ice should be sent t o the a t t e n t i o n of the Accounts Payable, Hall-Houston O i l Company, 700 L o u i s i a n a , Suite 2610, Houston, TX 77002.

A n o t a r i z e d a f f i d a v i t should be sent to the a t t e n t i o n of Kathy Camp a t the above address.

Thank you fo r your cons idera t ion w i t h t h i s matter . I f you have any questions please contact the undersigned at 713/225-7623.

S i n c e r e l y ,

Kathy Camp J Manager, Regulatory A f f a i r s

KC

Public Not ice o f Federal Consistency Review of a Proposed Development Operations Coordinat ion Document (DOCD)

by the Coastal. Management Div i s ion /Louis iana Department of N a t u r a l Resources f o r the Plan's Consistency

wi th the Louis iana Coastal Resources Program.

Applicant: Ha 11-Houston O i l Company 700 Louisiana, Suite 2610 Houston, Texas 77002

Location: Grand I s l e Area, Block 82 OCS-G 5659, Offshore Louisiana

Descript ion: Proposed DOCD f o r the above area provides f o r the development and product ion of hydrocarbons. Support a c t i v i t i e s are t o be conducted from an onshore base located a t Fourchon, LA (o f f sho re Lafourche Par ish, LA). No eco log i ca l l y s ens i t i ve species or hab i ta t s are expected to be located near or a f f e c t e d by these a c t i v i t i e s .

A copy of the plan descr ibed above i s ava i l ab le f o r inspec t ion at t he Coastal Management D i v i s i o n O f f i c e located on the 10th Floor o f the State Lands and Natural Resources B u i l d i n g , 625 North 4th S t r e e t , Baton Rruge, Louis iana. O f f i c e hours: 8 AM to 5:00 PM, Monday through F r iday . The publ ic i s requested to submit com­ments to the Louis iana Department of Natural Resources Coastal Management D i v i s i o n , A t t e n t i o n OCS Plans, P.O. Box 44487, Baton Rouge, Louisiana 70804-4487. Comments must be received w i t h i n 15 days of the date o f t h i s notice or 15 days a f t e r the Coastal Management Section ob ta ins a copy of the plan an i t i s ava i lab le f o r publ ic inspec t ion . This publ ic no t i ce i s provided to meet t he requirements o f the NOAA Regulations on Federal Consistency w i t h approved Coastal Management Programs.

ENVIRONMENTAL REPORT

OCS-G 5659

GRAND ISLE 82 (W/2 & SE/4)

OFFSHORE, LOUISIANA

Prepared by:

J . Connor Consulting P.O. Box 218753

Houston, TX 77218 713/558-0607

August, 1989

TABLE OF CONTENTS

TITLE PAGE 1

TABLE OF CONTENTS i i

I . DESCRIPTION OF PROPOSED ACTION 1

A. DESCRIPTION OF PROPOSED TRAVEL MOOES, ROUTFS AND FREQUENCY 1

B. ONSHORE SUPPORT BASE 1 C. NEW OR UNUSUAl TECHNOLOGY 1 D. VICINITY MAP 1 E. PROPOSED MEANS TO TRANSPORT OU AND GAS TO SHORE,

ROUTES, OUANTITIES 2

ASCRIPTION OF AFFECTED ENVIRONMENT

A. COMMERCIAL FISHING 2 P. SHIPPING 3 t . PLEASURE BOATING, SPORT FISHING AND RECREATION 3 D. POTENTIAL OR KNOWN CULTURAL RESOURCES 4 E. ECOLOGICALLY SENSITIVE FEATURES 4 F. PIPELINES ANO CABLES 6 G. OTHER MINERAL USES 6 H. OCEAN DUMPING 6 I . ENDANGERED AND THREATENED SPECIES AND CRITICAL HABI.M 6 J. SOCIO-ECONOMIC DATA 8

I I I . UNAVOIDABLE ADVERSE ENVIRONMENTAL IMPACTS 8

A. WATER QUALITY 8 B. EFFECTS ON MARINE ORGANISMS 8 C. WETLANDS AND BEACH 8 D. AIR QUALITY 8 E. COMMERCIAL FISHING 9 F. SHIP NAVIGATION 9 G. CULTURAL RESOURCES 9

H. RECREATION AND AESTHETIC VALUES 10

IV. SUMMARY 11

REFERENCES 12

I. DESCRIPTION Of PROPOSED ACTION

Hall-Houston Oil Coapany (Hall-Houston), plans to conduct development activities on Grand Isle Area Block 82, (W/2 I SE/4), OCS-G 56S9.

As proposed, the Initial Developnent Operations Coordination Document for Grand Isle Arta Block 82, W/2 t SE/4, Includes tht installation of a 4-pile plat'orm to product Wtlls 1, 2 and 3.

At this tint, tht planned commencement date for propostd activities Is on or about

A. DESCRIPTION QF PROPOSED TRAVEL HOPES. ROUTES AND FREQUENCY Boats and htlicopttrs will bt dispatched from a support bast locattd in Fourchon, Louisiana. The boats will normally move to tht block via tht most direct routt from Fourchon, Louisiana, howtvtr, ottnr boats operating in tht field may travtl from othtr optratlons ntarby. Following is an estimate of trips to tht propostd operation.

Production Optritions Strvlct Boat 10 trips ptr wttk Helicopter 2 trips ptr wttk

B. OHSHORE SUPPORT BASE Tht propostd activities will utilize a support bast locattd at Fourchon, Louisiana. This bast provides 24-hour strvlct, a radio tower with phone patch, dock spact, office spact, poking lot, equipment and supply storagt spact, drinking and arill wattr, *tc. Tht proposed development activities will help to maintain this base at Its present ltvtl of activity. No expansion of tht physical facilities or tht creation of ntw jobs is expected to result from tht work planntd in conjunction with this block.

C. NEW QR UNUSUAL TECHNOLOGY No ntw or unusual ttchnology will bt rtquirtd for this operation.

D. VICINITY MAP

Grand Isle Arta Block 82 (W/2 & SE/4) is locattd approximately 40 milts south of tht Louisiana coastline. Wattr depth 1s approximattly 200 fttt.

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e. PROPOSED HEMS TQ TRANSPORT OIL AND GAS TQ SHORE• ROUTES, QUANTITIES

I f producible hydrocarbons art found they are l ikely to bt transported to short through connections with plptllnts In plact In or ntar Grand Isle 82.

I I . DESCRIPTION QF AFFECTED ENVIRONMENT

A. COMMERCIAL FISHIHG

Tht Gulf of Mtxlco 1s tht single most Important arta for f lshtr i ts produc­tion in the Unlttd Statts. Louisiana with Its txttnslvt coastal marshts and nutrient Input from tht Mississippi and Atchafalaya Rivers Is tht most productive Statt In Unas of commercial f l sh t r i t s . Sixty-four ptr ctnt (64%) of tht tidal marshts along tht entire Gulf Coast art found In Louisiana.

Shrimp (primarily brown and white) art by far tht most valuablt component of tht Louisiana landings. Production of shrimp depends largely on environmental conditions In tht estuaries during postlarval recruitment. Production is good when thtrt Is a warm, dry spring.

Menhaden art tht statt*s largest fishtry In terms of pounds landed and ranks stcond In valut. Unllkt the shnmp fishtry, this fishtry optratts exclusively offshort. Menhaden art found primarily In shallow wattrs with about 93% of tht fishing t f fort occurring within 10 milts of short.

Oysters constitute tht third most valuablt commercial fishtry in Louisiana. Tha most Important artas for oysttr production art Terrebonne Parish, Barataria Bay, and tht Lakt Borgne-Breton Sound Systtm.

Tha blue crab Is Louisiana's fourth most valuablt commtrclal f ishtry species. Estuarlne wattrs product ovtr 90% of this catch.

Othtr Important Louisiana f lshtr i ts include tht food finfish and thost for Industrial purposes, such as pet food. Approximately SO sptclts of food f i n f i s h art harvtsttd In tht Guif. Soma of tht mort important art croaktrs, snapptrs, grouptrs, black mul I t t , red and black drums, spotted and s l l v t r statrout, Spanish macktrtl, spots pompano, flounder, cr tva l l ts , Gulf k ingf ish, shttpshtad, and king macktrtl. Tht majority of food f inf ish art caught In coastal wattrs with tht txctption of snapptrs, grouptrs, macktrtl, tuna, and bi l l f ish.

In 1986, tht commtrclal fishing Industry landed Louisiana 1,700 million pounds valued at S322 mil l ion. Louisiana ranktd f i rs t In tht United Statts In pounds landed and stcond in valut.

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B. SHIPPING

Fairways play an inportant role 1n the avoidance of collisions on the OCS, particularly In tht cast of tht large oceangoing vtsst ls , but not al l vessels stay within tht fairway.,. Many othtrs, such as fishing boats and OCS support vessels, travtl through artas with a high concentration of fixed structures. In such casts tht wost Inportant nltlgatlon factor 1s tht requirtntnt for adequate narking and lighting of structures. Afttr a structurt has bttn In place for a while, it ofttn becomes a landmark and an a id to navigation for vassals that operate In tht arta on a regular basis.

Grand Isla Area Block 82, Is clear of shipping fairways and anchorage areas. Tht platform and the marine vessels servicing this operation will be equipped with all U.S. Coast Guard required navigational safety aids.

C. PLEASURE BOATING, SPORT FISHIHG AND RECREATION

The northern Gulf of Mexico coastal zone is one of the major recreational regions of the United States, particularly in connection with marine fishing and baach-rtlattd ac t iv i t ies . The shorefror.ts along tht Gulf Coasts of A >ama, Mississippi, Louisiana, and Ttxas offtr a diversity of natural and developed landscapes and seascapes. Tht coastal beaches, barrier Islands, tstuar int bays and sounds, river dtltas, and tidal marshts art txttnsivtly and intensively uti 1 ized for recreational activity by residents of the Gulf South and tourists from throughout the Nation, as well as from foreign countries. Publ icly-owned and administered artas such as National saashorts, parks, beaches, and wildlife lands, as wtll as specially designated preservation artas such as historic and natural sites and landmarks, wilderness artas, wi ld i fe sanctuaries, and scenic rivers attract r ts idtnts and visitors throughout tht year. Commercial and private recreational fac i l i t ies and tstablishmtnts, such as resorts, marinas, amustmtnt parks, and ornamental gardens, also strvt as prleary Interest areas and support s t rv lcts for people who seek enjoyment from the recrea­tional resources associated with the Gulf.

Tha two major recreational artas most directly associated with the offshort leasing and pottntial ly afftcted by it are the offshore marine environment and tht coastal shortfront of tht adjoining statts. Tht only major recreational activity occurring on tht OCS is offshort marine recreational f ishing and diving. Studies, rtports, and conftrtnct proceedings published by MMS and others have documented a substantial recreational fishtry Including scuba diving, r i r tc t ly asso«.i'+td with oil and gas production platforms. Tht recreational fishing associated with oil and gas structures stems froa thtir function as high proflit a r t i f ic ia l fishing r t t fs . A rtport on tht 1984 Marina Rtcrtatlonal Fishery Statistics Surveys prtstnttd by NMFS at tht Sixth Annual Gulf of Mexico Information Transftr Netting Indicates a majority of tht offshort rtcrtatlonal fishing In tht Ctntral and Wtstern Gulf of Mtxlco is directly assoclattd with tht oil and gas structurts . Thtrt art currtntly about 4,000 offshort oil and gts structurts 1n tht Ctntral and Wtsttm *u!f of Mtxlco. Many othtr studits have denonstrattd that when oi l and gas structurts art acctsslblt to marina

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rtcrtatlonal fishermen and scuba divers thty art a major attraction for marine rtcrtatlonal act iv i t i ts and a positivt influence on tourism and coastal economics.

With tht exception of Grand Isle and vicinity and a stretch of beach arta In Cameron Parish, (Ptvtto/Constanct/Ocean View Beaches, Molly Beach, Hackberry Beach) Louisiana has vtry limited beach arta suitable for recreation. Most of I t Is vtry narrow, of poor rtcrtatlonal quality and gtntral ly Inaccessible by automobile. Some of the highest quality beach artas In coastal Louisiana art found along tht barrier Islands chain off Terrebonne Par ish. Several additional significant rtcrtatlonal rtsourcts art found along tht Gulf Coast. Louisiana has ornamental gardtns, scenic roads, - I v t r s , and tra i ls .

0. POTENT I A.. QR KNOWN CULTURAL RESOURCES

Archaeological resources art any objects or features which are n.an-made or modified by human activity. Significant archaeological resources are either h is tor ic or prthistDrtc and, as detineJ by 36 CFR 60.6, generally Include properties greater than SO years old which ait associated with events that have madt a significant contribution to tht broad patttms of our history; art associated with the l ive* of persons significant in the past; embody the d ist inct ive characteristics of a typt, period, or mtthod of construction; r tprtstnt tht work of a masttr; posstss high ar t is t ic valuei; represent a signif icant and distinguishable entity whost components may lack Individual d ist inct ion; or havt y l t ld td , or may be l ikely to yield, information Important in prehistory or history.

An Archaeological and Hazards Survty was not required on Grand Isle 82; howtvtr if any site, structurt, or object of historical or archaeological significance should bt discovtred during any operation, Hall-Houston will Immediately report to the Regional Director and every reasonablt tffort will bt madt to prestrve and prottct tht cultural rtsourct from damage until tht Regional Director gives directions as to its preservation.

E. ECOLOGICALLY SENSITIVE FEATURES

Barr ier beaches art a common landform along the Gulf Coast and stretch in an Irregular chain from Florida to Ttxas. Theie elongated, narrow landforms art composed of sand and othtr loost sediments transported by waves, currents, storm surges, and wind. In geologic tarns, barrier Islands are a young phenomenon, being formed only In the last 5,000 to 6,000 years. The U n a "barrier" idtntlf lts tht structurt as ont that prottcts othtr featurts, such at bays, estuaries, tnd marshes, from direct wavt attack of tht optn ocean. Tht wattrs In thtst bays and estuaries art a bltnd of tht terrestr ia l - f resh wattr systtms of tht mainland and tht saltwater systtm of tht octan, and among tht richest ecosystems known. Many of the spec Its that Inhabit tht bays, estuaries, and adjacent marshes use thtst artas ts spawning, nurstry, and feed grounds. It Is estimated that two-thirds of the

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top value Atlantic and Gulf Coast species of fish are directly dependent In some stages of l i fe on conditions 1n these estuaries.

Another benefit of both the Islands and thtir adjacent marshes and bays Is that of providing habitats for a large number of birds and ther animals. The Islands also provide habitat for several thousand threatened or endangered species, for example, the loggerhead turtle, the southern bald eagle, alligators, and brown pelicans.

Louisiana has the most rapidly retreating beaches In the nation. The average retreat for the Fourchon beach over the last 100 years has been in excess of 60 ft /yr. The statewide avt-. gc according to Dolan et a l . (1982) 1s ir excess of 12 f t / y r . The consequences of barrier Island retreat are observer «t Isles Oerniers In Terrebonne Parish and at the Chandeleur Islands in St. Bernard Parish. These barrier Islands once flanked central heal"lands like the central headland at Fourchon, but both have subsequently become separated from the mainland.

The importance of the coastal wetlands to fish and wildlife resources Is well-documented. FWS studies indicate that Louisiana contains 40% of the vegetated coastal wetlands In the conterminous United States and 64% of the t idal marshes along the Gulf of Kexico. The Louisiana coastal wetlands support over two-thirds of the Mississippi Flyway wintering waterfowl population (including 20-50% of North America's puddle duck population) end tha largest fur harvest 1n North America (from 40-65% of the Nation's total per ytar) .

Wetlands in coastal Louisiana are usually established on a substrate of a l luvia l sediment that Is subject to high, natural subsidence rates. The t f f t c t s of natural subsidence are compounded by sea level r ise , which has been occurring during the past several millennia. Under natural conditions, sedimentation encourages vertical accretion of wetland areas and may offset tht submergence and inundation that result from subsidence and sea level r i s e . The deter ioration of coastal wetlands, particularly In Louisiana, is an Issue of concern; it has bttn estimated that the state Is losing up to 50 square miles of wetlands every year. Wetlands loss in coastal Louisiana Is most severe in that area of the State that is to the east of the Atchafalaya River and is commonly referred to as the Mississippi River Deltaic Plain rtg 1 or..

A rtctnt stud, funded by MMS entitled "Causes of Wetland Loss in the Coastal Cr .rai Gulf of Mexico", examined coastal ecosystems of the Northern Gulf of KCAICO region and how wetland habitats havt changed as a result of natural processes and man's ac t iv i t ies thereon. The study's primary focus was on assessing and quantifying tht direct and indirect Impacts of OCS-related act iv i t ies on wetland areas. OCS-related activit ies began In the Gulf region In the tarly 1950's and based on the study's findings, of tht total direct Impacts to tht areas wetlands (which equate to 74,000ha), OCS-related Impacts have contributed to only 4-5% (11,000-14,OOOha) of Louisiana's total wetlands loss during the period 1955/56 to 1978 and soma 26% of direct Impacts there.

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Thc shelf and shel f edge of the Central and Western Gulf are characterized by topographic features which are inhabited by benthlc communities. The habitat created by the topographic features is important because they support hard-bottom communities of high biomass, high d i ve rs i t y , and high numbers of plant and animal species; they support, e i ther as shel ter, food, or both, large numbers of commercially and recreat ional ly Important f ishes; they art unique to the extent that they are small isolated areas of communitits in the vast Gulf of Kexico; they provide a re la t i ve l y pr is t ine area suitable fo r s c i e n t i f i c research; and they have an aesthet ical ly attract ive i n t r i ns i c value.

The Central Gulf of Mexico l i s t s 16 topographic features. None of those Hsted art In or near the v i c in i t y of the proposed operations in Grand Is le Block 82.

F. PIPELINES AND CABLES

A 16-inch gas p ipe l ine operated by Trunkline crosses from the east l ine approximately 950* from the north l i ne and crosses th? north l ine approximately 4800* from the east l i n t .

An 8 inch gas p ipe l ine operated by Enron crosses the east l ine »pproximately 200' from the north l i ne to a t i e - i n wi th the Trunkline 16-Inch l ine approx'mately 1500' from the east l ine and 650' from the north l i n t .

A 6-lnch gas p ipe l ine operated by Enron crosses the wrst l ine approximately 270C from the north l i n e and t ies In with the Trunkline 16-Inch pipel ine.

A 10-inch gas p ipe l ine operated by Trunkline crosses the south li">e approximately 3800' from the east Une and t ies In with the Trunkline 16-inch pipel int .

Hall-Ho ston, as a prudent operator, w i l l avoid i l l pipelines and cables in th is block during exploratory a c t i v i t i e s .

G. OTHER MINERAL USES The act iv i t ies proposed for Grand Is le Area Block 82, W/2 & SE/4 w i l l have no direct or Ind i rect Impact on other mineral uses.

H. KEAJ1 DUMPING Ocean dumping 1s proh ib i ted in th is area.

I. OttnNGERED AHD THREATENED SPECIES ANP CRITICAL HABITAT Six Federally l i s t e d endangered whale sptcies may occur in the Gulf of Mexico--the blue, f i n , humpback, r i gh t , s ic , and sperm whales. Generally,

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these large cetaceans Inhabit the continental slope and deep oceanic waters; ocass lonal ly , they are sighted nearshore.

End aw ^red red wolf hybrids occur along the Gulf Coast In Cameron Parish, Lou i s i i na .

Federal ly l is ted endangered sea tur t les (Kemp's r i d l e y , green, hawksbi l l , and leatherneck tur t les , and the threatened loggerhead t u r t l e ) occur In the Gulf o f Mexico. The green t u r t l e Is l is ted as threatened in Louisiana. The Kemp's r id ley tur t le inhabi ts shallow coastal and estuarlne waters and commonly occur In shallow water areas from Marsh Island to the Mississippi Delta 1n Louisiana (Hildebrand, 1982). The green t u r t l e Is found throughout the Gu l f , where Its favored habitats are lagoons and shoals providing an abundance of marine grass and algae on which i t feeds. No recent green t u r t l e nesting has been reported along Gulf beaches. The hawksbill t u r t l e Inhabi ts reefs, shallow coastal areas, and passes in water depths of lass than 20 m deep. Hawksbill nest ing has not been reported along the coast of Louisiana. The leatherback t u r t l e may be found near the continental shelf edge. Sightings have been reported along the Gulf Coast, but no recent nest ing has been reported. Th» loggerhead t u r t l e occurs throughout the Gulf and has been observed as fa r as 500 miles out in the open sea. Infrequent nest ing occurs on the Norther*. Gulf Coast. In addit ion to the i r usual hab i ta t area, turt les are sometimes seen around offshore o i l /gas platforms.

Th*t American al Ina to r occurs generally throughout the Gulf Coast region in f res ' i to brackisn water areas. Tha a l l iga tor is l i s t e d as "threateneo by s i m i l a r i t y cf appearance" throughout. I ts range.

T > ie endangered red-cockaded woodpecker occurs pr imar i ly in mature open pine fo res ts tnroughout the eastern and Central Gulf area and nto eastern Texas.

Endangered American and threatened art ic peregrine falcons migrate along the Gulf Coast, and some peregrine falcons overwinter in Gulf coastal areas. The a r t i c peregrine falcon migrat ion route occurs along the ent i re Central and Eastern Gulf of Mexico coasts. The endangered piping plover 's winter range Is along the Gulf Coast.

Brown pelicans remain l i s t e d as endangered in Louisiana. Three brown pel ican rookeries (about 2,500 birds) occur at North Island, Northern St. Bernard Parish, and Queen Bass Island in Louisiana. The habitat of these co lon ia l nesters Is small coastal Islands In sal t and brackish water areas.

These species may be affected by the development of coastal lands and/or the occurrence of o i l sp i l l s which may affect the species d i rec t l y or through t h e i r fc sources. Since th<~ proposed ac t i v i t i es Include no plans for the deveiopr ot of the coastal lands, the Impact on endangered and threatened spedes is primarily based on the occurrence of o i l s p i l l s .

Hall-Houston as a prudent operator w i l l take a l l necessary measures to reduce the probability of o i l s p i l l s . Hall-Houston's proposed development operat ions on Block 82 should not pose a threat to any endangered or threatened spec I t s .

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J. SKIO-ECONOMIC DATA

In accordance wi th MMS guidelines, the I n i t i a l OCS Socio-Economic Data Base Report for the support base f a c i l i t i e s u t i l i zed by Hall-Houston w i l l be prepared for submission pursuant to the specif ic parameters to be established by the MMS at a later date.

I I I . UNAVOIDABLE ADVERSE ENVIRONMENTAL FFrECTS

The greatest threat to the environment would be caused by an o i l s p i l l or well blowout. These occurrences can be reduced In number by u t i l i z i n g trained personnel, adequate operational safeguards, and employing available safety and po l lu t ion control systems. These measures are standard operating procedure for Hall-Houston Oil Company.

A. HATER QUALITY

Production a c t i v i t i e s w i l l temporarily reduce water qual i ty adjacent to the location. This w i l l Increase tu rb id i t y in a plume down-current from the work s i te. Released watsrs and a minor o i l s p i l l could also contr ibute to water quality degradation.

B. EFFECTS ON MARINE ORGANISMS

Some organisms w i l l be k i l l ed and some w i l l be temporarily funct ional ly impaireo as a resu l t of production operations. Thc most affected groups w i l l be plankton and benthos Immediately around the p la t f c m . Damage w i l l bfi both aec^anical and toxicological . These 1,npac*s ar.- com:4 d t red to b» localized, short term and reversible at the mpuiat ior l eve l .

An o i l sp i l l could a f fec t a broad spectrum of marine or*- isms. However, most effects would be localized and short term. Any e f f t on mammals and tu r t les would be s ign i f i can t .

C. WETLANDS ANI ,rACjj

In the unlikely event of a sp i l l occurring and reaching shore, organisms in wetland and beach habi tc ts could be k i l l e d or funct ional ly impaired. Human community d isrupt ion could also occur. Although a l l such t f f t c t s would be localized, any e f fec t s on endangered species and/or c r i t i c a l habitats would be signif icant.

D. AIR QUALITY

The ltr quality at tht ltast site will bt degraded tei... . arily during operations, but should return to normal once operations art mtasurably completed. Offshort activi tits probably will not afftct onshore air

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q u a l i t y . Air qual i ty at the onshore base w i l l be only i ns ign i f i can t l y reduced by onshore a c t i v i t i e s . Any such e f fec t w i l l be temporary.

E. COMME PC IAL FISH IMS

The major Inpact on f i sh ing ac t iv i t ies from the proposed operations 1s production platform placement, o i l s p i l l s , and underwater OCS obstructions such as pipelines and debr is . Other impact producing factors Include discharge of d r i l l i n g muds and removal of structures.

O i l s p i l l s that contact the coastal marshes, bays, estuaries, and open Gulf areas with high concentrations of f loat ing eggs and larvae have the greatest p o t t n t i a l for damage to commercial f isher ies. An o i l sp i l l could seriously a f f e c t th t shrimp, o y s t t r , and f in f i sh catchts In Louisiana as t h t s t fishes a r t estuarine dependent.

One production platform removes approximately 4 acres of trawling space, and underwater OCS obstructions cause gear con f l i c ts which result In such losses as t rawls , shrimp catch, business downtime, and vessel damage. Gear c o n f l i c t s caused by underwater OCS obstructions are mitigated by the Fisherman's Contingency Fund.

The Insta l lat ion of p ipel ines w i l l contribute to f ishery habitat loss and, t h t r t f o r t , negatively impact fishery resources.

The removal of platforms results in habitat loss and can cause f ish k i l l s when explosives are used.

In conclusion, although these factors impact the cofimer-.ial f isher ies Indus t r ies , the level of impact is expected to be very negl ig ib le .

F. SHIP NAVIGATION

Vt ry l i t t l e Interference can ot expected between the platform and marine v t s s t l s ut i l ized during production operations and ships that use established fa i rways . However, at n ight and during rouoh weather, fog, and heavy seas, ships not using established fairways could co l l ide with the plat form. Approved aids to navigation wi 11 oe in accordance with USCG regulat ions.

G. CULTURAL RESOURCES

T h t r t Is only a small p robab i l i t y that an unknown c i ' t u r a l resourct t x l s t s In the least area.

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H. RECREATION AND AESTHETIC VALUE?

The platfora and marine vessels aay represent an obstacle to soae sport fisherman, but such an ef fect is expected to be negl igible and not per-aanent.

Even though ex is t ing regulations and orders prohibi t indiscriminate l i t t e r i n g of the aarine environment with trash, offshore o i l and gas operations Involving aen, aachines, equipment, and supplies is bound to resu l t in soae l i t t e r i n g of the ocean. Human nature and accidents asso­ciated with offshore operations w i l l contr ibute some f loatable debris to the ocean environment which w i l l eventually come ashore on major recreational beaches.

The effects that normal operations or a minor o i l s p i l l would have on any f i s h stocks Important to sport fishermen are also considered to be negl ig i ­b l e .

A minor o i l sp i l l and/or non-petroleum f loat ing debris could foul beaches Inshore of the lease area. The foul ing of the beaches would be an aesthetic detriment that could adversely af fect recreation. Any ef fects on beach recreation could adversely af fect tourism, and consequently, the local economy.

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IV. SUMMARY

The proposed a c t i v i t y w i l l be carried out and completed wi th the guarantee of the following Items.

A. The best ava i lab le and safest technologies w i l l be u t i l i zed throughout the pro ject . This includes meeting a l l applicable requirements fo r equipment types, general project layout, safety systems, and equipment and monitoring systems.

B. Al l operations are covered by a Minerals Management Service approved Oi l S p i l l Contingency Plan.

C. Al l applicable Federal, State, and Local requirements regarding a i r emission and water qual i ty and discharge for the proposed ac t i v i t i es , as wel l as any other permit condit ions, w i l l be complied w i t h .

D. The proposed a c t i v i t i e s described in detai l in the Development Operations Coordination Document w i l l comply w 'h Louisiana's Coastal Management Program and w i l l be conduc**. in a manned-consistent w i th such Program.

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REFERENCES

1. Final Envir e Impact Statement. Proposed Oil and Gas Lease Sales 110 an- ., Gulf of Mexico OCS Region, OCS EIS, MM5 86-0087

2. Final Environmental Impact Statement. Proposed 011 and Ga. Lease Sales UO and 112, Gulf of Hexico OCS Region, OCS EIS, MMS 86-0087, vf'uaU.

3. Final Environmental Impact Statement. Proposed Oil and Gas Lease Sales 113, 115, and 110, Gulf of Mexico OCS Region, OCS EIS, MMS 87-0077.

4. Final Environmental Impact Statement. Proposed Oil and Gas Lease Sales 118 and 122, Gulf of Mexico OCS Region, OCS EIS, MMS 88-0044.

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P.O. Box 218753 Houston, Texas 77218 713-558-0607

PROJECTED AIR EMISSIONS SCHEDULE FOR DEVEI OPMENT/PRODUCT ION PROJE

GENERAL INFORMATION

Location:

Dutance f shore: Name of Caisson: Operator:

Contact Person: Date Production Will Begin:

Grand Isle u2 (W/2 t SE/4) OCS-G 5659 40 miles Platform "A" Hall-Houston Oil Company 700 Louisiana, Suite 2610 Houston, Texas 77002 Ms. Kathy Camp June 15, 1990

MINOR SOURCES (OFFSHORE)*

Projected Emissions Emitted Substance Itons/vearl»»

CO .61 SO .01 2

NOx .25 VOC .06 TSP .02

Tables 3.2.1-3, 3.2.3-1 and 2.1-1, "Completion of A1r Pollutant Emission Factors". Third Edition, EPA Report AP-42, August, 1977.

Projected emissions are based on mixlmum possible values for one ytar. Most emissions will occur juring installation operations

ONSHORE SOURCES

These should be about the same as minor sources unless new facilities aro Installed at tht onshort bast. No additional facilHits art rtquirtd or planned at this time.

Projected Air [missions Hall-Houston Oil Company Grand Isle 82 (W/2 l SE/4)

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FM1SSIQN EXEMPTION DETERMINATION

2/3 2/3 For CO: E - 3400 - 3400 (40) - 39,767 tons/year For NOx, VOC. TSP & SO . E - 33.3D - 33.3 (40) - 1332 tons/year

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PREDICTED PRODUCTION

Gas Production -Condensate -Date Production Wi l l Begin: June 15, 1990

TRANSPORTATION SERVICES

Service Boats (3000 hp) Trips Per Week During Production - 10

Helicopter Trips Per Week During Production - 2

METHODOLOGY

Platform: Horsepower - hour rethod Boats: Horsepower - hour method Helicopters: Landing/Takeoff (LTO) cycle method

REFERENCES

Production - EPA 450/3-77-026 (June, 1977) - "Atmospheric Emission from Offshore 011 and Gas Development and Production", pp. 81-116.

Boats - EPA Report AP-42 - "Compl l a t ior. of A i r Pol lutant Emission Factors", 3rd Ed i t ion , (August, 1977), pp. 116, 125 and 127.

FINDINGS Qf MR QUALITY REVIEW

As per DOI/MMS regulat ions, th is f a c i l i t y Is exempt from fur ther a i r qual i ty rtvlew as i t has been determined that i t s optratlons w i l l not have a signi f icant advt rs t Impact on a i r qua l i t y .