t

WAT* * 3 "WW

Atteft-tfttni rt*\ CV X. * •-wi&tH? )/#|U &»*£&«$?}Of pt f**?. •«.- • Houston, r;x»s JltMh

Re ferine*. to y«yr. tofjtta? Wa* af F.x?t1?irat1iwi atvl £«¥:trom*f*i>?. "nsiort received Hay I*wt4, for u a s * OCS-G V***, Block VJ, C h a n ^ ^ i r Area, .'his rjldft the l i tes the ft€T.i«1tif.s nrusjossd fo r Hx w*1T$.

l i i "eccordance with '30 CFK 2*^.34, > ;v is«1 J^c?wber U , I ' W , # d oiir r ftet*-:-* January 1979, ti.tH oU;« h*$s bsffii <tatgfi&ric4 to be cosnplstt as * Mav £3, l!>'§1, and 1s now ^t'ing conM^rod for igptrotfal..

Your cofitr>1 n«<fer H.iM.Sg? *fi£.$*iiW Ul rHf-r*nt-v*1 ifi your coftKWitl/ra-r t i o n #R • ci>rrecr*on^f.nes conc^rnlw; tn is :>1a«.

Sftic*r$1y yours,

Regional Sua$rVisor &rTa& aivJ PrrxtMCti O"

I Plan and (PUBLIC RECORDS ROOM)

MWWini«BSO«:qt.f: 5/22/84 3

Office of Program Service*

A N A D A R K O P R O D U C T I O N C O * » » A M Y 1 6 8 0 1 G R E E N S P O I N T PAR K D R I V E H O U S T O N . T C X A S 7 7 0 6 0

Ci

nvi on!

May 21, 1984 yiWDWB KBfr*,GE¥WT SEIVICE

United States Oepartment of Interior Minerals Managwnent Service Gulf of Mexico OCS Region

MAY 22 1984

mANO mmcmtt P. 0. Box 7944 Metairie, Louisiana 70010

Attn: Mr. 0. W. Solanas Regional Supervisor Rules and Regulations

Gentlemen:

Chandeleur Area block 18, a 4706.46 acre tract, was purchased in the Federal OCS Sale No. 81 held on April 24, 1984.

The participants in the $9,215,000 lease purchase are:

As designated operator for the lease, Anadarko is submitting the enclosed Plan of Exploration for your approval. We plan to begin exploration of the tract as soon as permits are approved.

Exploration and any future production activity within the Chandeleur Area Block 18 will be conducted in a manner consistent with state and federal requirements for coastal zone operations. The activities associated with this plan will be executed in compliance with all OCS orders and memoranda. All required permits will be filed in a timely manner.

RE: Plan of Exploration OCS-G 6838 Block 18 Chandeleur Area

Anadarku Production Company Sante Fe International Corporation Energy Development Corporation

33.334* 33.333% 33.333%

Mr. D. W.'Soranas United States Department of I n te r i o r Page 2

Anadarko Production Company has an Oil Sp i l l Contingency Plan on f i l e with tha MMS and is wi th in the 12 hour fast response time. As an operator in the Gulf of Mer.ico and a member of the Clean Gulf Associates, Anadarko intends to exercise a l l di l igence toward protection trf the environment while implementing th is Plan of Expl t i on .

C. K. ABERNATHY w DIVISION OPERATIONS MANAGER

CICA:PWS/ncl Enclosure

• ! • COASiAL ZONE MANAGEMENT

CONSISTENCY CERTIFICATION

EXPLORATION Type of Plan

CHANDELEUR BLOCK 18 Area and Block

OCS-6 G838 Lease Number

The proposed ac t i v i t i es described in de ta i l in th i Plan comply with Louisiana and Mississippi approved Coastal Management Programs and w i l l be conducted in a manner consistent with such Programs.

Arrangements have been made with the State-Times in Baton Rouge, Louisiana to publish a pub l i c notice of the proposed ac t i v i t i e s no later than one week after the POE is determined to be complete by Minerals Management.

ANADARKO PRODUCTION COMPANY

DIVISION OPERATIONS MANAGER

ANADARKO O C S G 6838

26 »— •*( I

* PHHL

.1 T O O ' 5 „

tiroo\ 7

8600' •

X . PBML

8600' •

X . PBML

:HTMI B

13

18

25

12

19

24

Fig. 1

Productton Company

C H A N D E L E U R A R E A B L K . 18 O C S L O U I S I A N A

P L A N O F E X P L O R A T I O N

"000 4000

i HOUSTON,TCXAS

U - j - 730" 30'

4 i • • • 1 - I • l 1 i " *"*UVI0SCA KNOLL

•"•to*} ffl % ^ vU £! iN" *»'

I 1NM 16-4 ' i i • •

+ - • • t - - - r - t • X • r_....t. ...,._». -J.

L {.1-4,4—^ *; :-'t *""4* ?y—. - 4 — t-

I/-0..1 r̂ 'i-s EJu -I / — r . r z t . \ r r r ^ \ ^ f , - • 4 - 4 • t - ^ r f T e S T £ \ r t - : - : / : ; : , ; > 4 ^ H f - H r

^ ^ •» v • . . . . . . . . . . . . . . . . -29* JC

T L i * 3

! •

PLAN OF EXPLORATION

CHANDELEUR AREA BLOCK 18

OCS-G 6838

DESCRIPTION OF DRILLING RIG

The attached schismatic and specifications she escribe the type

of d r i l l i v r ig Anadarko anticipates using to u r i l l the wells in

the Plan of Exploration. The specific r ig which w i l l be ut i l ized

is similar to the JU-200 MC.

The JU-200MC in operating position. Cantilever feature can place rotary as far as 45 feet astem of platfoim

JU-200MC Norn inal Dimensions'

Pkjrfwrn -37'x 132'x 18* Mat 220'x 185'x 10'

+ 2'Skm Slot 59'8''x'M0 ,v*ae Columns (3) tV 00x269 ' long

Nominal Capacitle*

Max. vanacie Loads: Cntling 1250 tons Moving (23'Nom. Draft) 1250 tons M o w - g ^ V D r a f r ) 350 tons

Dnlling Wattr 5.900 bol Fuel Cil 1000 DCI Potaoie water 1.000 DPI bauid Mud 1500 DDI Bulk Mud & Cemer.t 6,000 cu ft Bog Storage 2.C00 sacks Floe Rack Area 1000 sa ft Quarters 5- cen Skicaccie SuDstructure

for 1.290.000-ib Derrick

Design Operating Cond ttl ons

Mln. Maneuvering Deottv tV6' Norv

Humcane Humcone Max Sttil Water Deorn f 175 ft 3200 ft

Max wave Heignt oOft 33 ft waveFenoa 15 sec 10 sec Design wina

70 kts vetocitv 100 Ws 70 kts Min. AirGao 45 ft 26 ft

Bethlehem's series of cantilever jack-uc drtl-iing ng designs include the mat-supportec JU-200MC (to 200' water depths). JU-150MC (150' waters) ana the JU-100MC (100' waters).

Bethlehem Bethlehem Slee l -Shipbui ld ing

i _3 r tnn t lAurt or* ! W w t * O M ^ I TX 77704 • Cdl: (713) 838-oS21 *« t c 77-0441 • C2CW* 3E7WSWP t s * t S t S m ^ ^ « g , C O - : 257-4745 . »e«* O21770 C c o i « H 9 N G S ^ c c c r e ExKunv* anaiSenSnl Soe* Mow fewer. Bernienem. PA 18OI6 Cd: [2*1694-:763

Oata curtec? cs cf :«er 2311A Marcn 'SfBC

Fig. 4

. J -

ATTACHMENT 4 i

•

h PLAN OF EXPLORATION

CHANDELEUR 18

0CS-G-6838

MUD ADDITIVES

The attached list of mud additives is anticipated to be used in drilling the wells

outlined in this Plan of Exploration.

Chapter 23 COMPARABLE MUD PRODUCTS BY T ! *3£ fe ..ES .

IMCO jMescription SERVICES Baroid Magcobar Miichem Primary Application

WEIGHTING AGENTS AND VISCOSIFIERS Bante IMCO BAR Baroid Magcobar Mil-Bur.' Fur increasing mud weight up to

20 P t *

irhnjai Calcium C jrhnAate IMCO W A T E I Lo-Wale W O. 30 Fur increasing weight ol oil mud. W O. SO up to 10 8 ppg.

Beraomtc IMCO GEL Auua<jrl Magcogel Milgel Viecosuy and nitration control in water baae m-jox

Suh-Bcmntute... IMCO It LAY Baroco High Yield Green Bond For uae when larger parucie u ie u Blended Clay Clay desired (or viscosity and Kit ration

control.

Attanuif i te IMCO BRINEGEL Zeogel Salt Gel Salt Water Gci Viscosifier m u t t water mud.

rknelkiaicd IMCO HYB Quick-Gel Kwik-Thik Super-Col Quick viscosity in fresh water upper hole

Bentonite muds with minimum chemical treatment.

Asbestos Fibers IMCO BEST Floaal Flosal Floaal Vncostlier for fresh or islt water muds.

Bactenaily Produced . . . . I M C O X C XC Polymer Duovu XC Polymer Viacostfier and fluid loss control additive Polymer for low solids muds.

DISPERSANTS Sodium IMCO PHOS Barafos Mafco-Phos Oi l Fos Thinner for low pH fresh water muds. Tetra phosphate

Sodium Acid SAPP SAPP SAPP SAPP For treating cement contamination. rVmprknphatc

Quebracno i M C O O B T Tannex M-C Quebracho . . Tanco Thinner for fresb water and lime Compound muds.

^Mmlocs . Extract I MCO FLO Rayllo Ray Ilo Thinner for fresh water mud* and in ^LW muds containing salt (10.000 tu 15.000

ppm |.

Modified DESCO Desco Desco Desco Thinner for fresh and salt water muds Tannin •Ikauied fur pH control.

Mined i.i antic IMCO LIG. Carbonox Tii nr. A Thm Ligco Dispersam. emulsifier and supplemen­tary additive for flusd loss com roi.

CauMici/cd I.ignite IMCO T H I N CC-16 Caustilig Lifcon i-o ratio causiic-ugntic drxperxaiu. emulsifier and supplementary rkud lost additive.

Calcium IMCO C A L Kem break Thinner for SCR and lime muds. LiBftoMkullonatc

Modified IMCO VC-10 Q-Broxin Spersene UnnCal Dispersant and fluid loss control additive LienoMillonatc for wster base muds.

Blended I ignmul- IMCO RD-1 I I Blended multi-purpose dispersant. flusd l o n fonate Compound agxnt and inhibitor for I MCO RD-111 mud

systems.

FLUID LOSS REDUCERS Pretectal iruscd IMCO L O I D Impermex My-Lo-Jel Mi 1st arch Controls fluid loss in saturated skit Starch water. Iune and SCR muds.

Sodium Cart. »xv. I M C O C M C Ceilex Magco CMC Miichem C M C For flusd loss control and bante methyl Cellulose (Regular) (Regular I (Regular) (Mcd-Vn) suspension in water base muds.

Sodium Carhoxv- I M C O C M C Ceilex Maaco-CMC Miichem CMC For flusd Una control and viscosity building mcthvl Cclluhmc ( H I - V I M (H i-V I») (Hi-Vis i (Hi-Vo.) in low solids muds.

Sodium Carboxy- IMCO C M C Ceilex Maaci C M C Milchcm CMC For fluid loss control tn gyp. sea water and methvl Cellulose (Tech Grade) (Tech Grade) (Tech Grade) (Tech Grade) fresh water fluids.

•> anionic Cellulosic .. DRISPAC Drispac Drispac Drispac Fluid loss control additise and v ucotifier Ii\ mer in salt muds.

Sodium CYPAN Cypan Cypan Cypan Fluid loss control in caictum-irec low solids Polyacry late and non-dtspersed muds.

Sodium WL-100 WL-100 WL-100 Wl-100 Flutd : n»control in caic.um-. ree tow solsds Poryacrylate and nort-d'spersed muds. ^

COMPARABLE MUD PRODUCTS BY TRADENAMES — Continued IMCO

Description SERVICES Baroid Magcobar Miichem Primary Application LUBRICANTS, DETERGENTS. EMULSIFIERS

Extreme Preuire I M C O E P EP Mud Lube Bit Lube Lubn-Film Uted ir. water ba * muds to unpen extre.. Lubneabi LUBE pressure lebrsaty

SOLTEX. . . ' Soltex Soltex Soltex Used in water base muds to lower down-H ydrocarbpns aotc flusd loss and minimize nea ving shale

Watar Duperxtbk IMCO STAB1L- H I - W D Lubncant and flu-d loss reducer for water Asphalts HOLE CO AT HOLE base muds that contain no diesel or crude oil

Oil Dispersible IMCO Baroid Pave-A-Holc Carbo-Seal Lubncant and fluid loss reducer (or water Asphalts M U D O I L flap bah base fau l t that contain diesel or crude oil

Oi l Soluble I M C O Skot-Frce Pig* Laa P W O M Non-weighted fluid fcr spotting to free Surfactants FREEPIPE differentially stuck ptpe

Detergent I M C O M D Con Dei D-D Miichem M D Used in water base muds io aid in dropping •and. Emulsifies otL reduces torque aad • rr immizes bit-bailing.

Non-loracEmukuficr . . . D M E Aktaflo-E SurFak-E D M E >»~v . : yrfacun- muds.

Blend of Anionic I M C O SWS Tnmulso SaJinex A t l o w l A Emutsifm • . jab and fresh water muds. S unacisnti AUosoi S

An Organic Entity IMCO TorqTrim DOS-3 Mil-Plata 2 Supplies the lubricating propenies ol oiis Neutralized with Anvnes LUBRIKLEEN without envi r rn menial pollution

Blend of Fattv Acids. 1 MCO SPOT SF 100 Invert emulsion which may be weighted to Sulfonates, i t Asphaltic desired dentily for spotting in free Matenals different a Iry stuck pipe.

DEFOAMERS, FLOCCULAMTS, BACTERICIDES Aluminum Aluminum Aluminum .Aluminum Alum mum Defoamer for lignosulfonate muds Stearate Stearate Stearate Stearate Stearate

Sodium Alkyl A ry I I MCO DEFOAM Magconol Defoamer for salt muratsd muds. - Sulfonate Data

Surface Acme. IMCO W200 LD-7 All purpose defoamer Dispmible LUIUKJ FOAMBAN W300 Defoamer.

Flocculating Agent IMCO FLOC Barafloc Fkuut Sept ran Used to drop drilled solids where dear water is desirable for a drill ing fluid.

Paraformaldehyde IMCO Akdacsde My-Lo-Jel Preservative J-revenu starch f iv ' ermenting when used PRESERVALOID Prase ̂ a u m ia muds of iest tha i saturation or alkalinity

iest than I.Occ

LOST CIRCL VI. J f ! MATERIALS Fibrous Maierial IMCO FYBER Fibenex Mud Fibar Mil-Fiber Fiuer i t well as matting material.

Fibrous Mineral IMCO WOOL MaaroWoo! M.l-Wool Often used in areas where acsos are later Wool employed to destroy Ihe material.

Walnut Shells.

Fine I M C O PLUO Wall-Net Nut-Plug Mil-Plug Most often uaed to prevent hat circulation

Medium I M C O PLUC Wall-Nut Nut-Plug Mil-Plug Used in conjunction with fibers or flakes tc regain lost circulation.

Coarse IMCO PLUC WaU-Nin Nut-Plug Mil-Plug Used where large crevices or iraciurcs art

Ground Mica.

I M C O M Y C A Micatex Magco-Mica Milmica Used for prevention of Ios*. circulation

Coarse I M C O M Y C A Micatex Magco-Mica Milmica Forms a good mat at face of well bore

Cellophane IMCO FLAKES Jel Flake Celi-O-Stai MUflake Used tn regain lost circulation

Combination ol IMCO Kwtk-Scal Kwik-Seal Kwik-Seal Used where large cr. vices or iractures* granules, flakes. K W I K S E A L encountered, and fibrous ma­tenals of vanous siZais in one sack

Blended high fluid loss soft plugging material.

DIASEAL M Dtaseal M Dia seal M Dtaseal M One sack mixture lor preparing soli plugs for severe lost circulation

*

COMPARABLE MUD PRODUCTS BY TRADENAMES — Continued

fMCO D t r ^ V . S ERVICES Baroid Magcobar MMcham Primary Aoplication

SPECIALTY PRODUCTS '.haisCufN-ol IMCO SCR . . . Rcaaent

*mmwmmpa**mt IMCO GEL «TC

. T - l Canroi d i c t u m cnlorule mud (o inhibiting tbe i welling of bttttoniiM.- trunks.

Non-1 J. urfanam . DMS

IrSTCaaa yieid of lemon*-«i u .ctr. van low »oi>d* dnUinr, fluid.

.Aktaf loS StirFafc-M OMS Pnmarytur.scui f o r i -rriu-atin* surfactant MUUJ Mav as - a .n h -ow* forvnuwi) sta*tiny.

Filming-Aminc I M C O FT-102 C-at-CI815 Ma teo I n h * n o r . .Aaw-Taa . Car ro t * * . i iManor Coat-415 No. 6

Shale Inhibitor

Specially Zinc Coi

IMCO SULF-X Compound*

Du*mmo»iatm r .wata mrpectalN errpsred L» \ r aa'

Faiaaaa:-Mil-Guard h e use -» a hydrogen tu Tide wa . ta

Sodium Chr Chromate

Sodium Hydroxide Caustic Soda

Sodium Carbonate Soda A a a . . . ,

COMMERCIAL CHEMICALS Sodium Sodium Sodium Used in water base mads to prevsr; Man

Chromaue Chromate Chromate temperaure gosuo.: tnd a* » corrosion taht boor

.Caustic Soo*

.Soda A a b . . .

. Caustic Soda . For p t ! i vmro l • water base muds.

Ash For ire :img o v P *

Sodium Bicarbonate Sodium

Banum Carbonate —

Calcium Sulfate G

^ a k m m Hydroxide . .

Sodium Chlonoc Sab

Anhvdrox

Gypsaes

.Sodium Bicarbonate

t satiate in low

. For treating oui calcium sulfate or < in high pH

Gypsum

. For treating out calcium tt.ii u t (pH should be above 10 for best rerun..

.Source of calc.um ior for ..uiann,' gyp rat*'*.

.La te Source of caJraum for fomutating lime i-usds.

Chrome Alton (chromic chloride i

Chi: Alum

.Sab

Chrome Alum

•Salt

.Chrome Alum

.Sab -or saturated sab muds anu reststivny control

.Chrome Alan For use m arts- l ink ing XC Polymer lystcms

OtL BASE AND INVEJTT EMUI.SIOH S i STEMS Invert Emulsion IMCO KENOL-S Invermul Vertoil Carbo Tec Svstem aad

IMCO KEN-X

Low Cost Invert IMCOOIL-X LoCOM Emulsion Systam

HL •Oi l Baae Mud IMCO KEN-SUPREME

. D n l lina fluids used wUere extremely .:gn temperatures arc encountered aho i dnlling. comotettor. or wor tovr ; iiu,t applicable where on;, oi l conta r-ii formations is desired.

. inexpensive invert used w"*r» dt tra' r ludtare u**~ and low t—r.^-rw i rc encounlered.

For dnl l ing wate tcns i tn . I'ormstsh'V.

Geut-nou* IMCO KEN-PAK SF-100 A t i rM setting gelatinous oi l park for rasing Oil Bast Fluid recovery and corrosion control.

O'L ftiVO ADDITIVES Pnmary Emulsifier IMCO K E N O L - S f D ) . . . . Invermul.

and IMCO KEN-X Cone. *UL)

. X . t o f l Carbo-TedD) and

Carbo-TedL)

. Pnmary additives to form stab** water Ms-ad emulsion.

VisctaHfler and IMCO KEN-GEL Ge -Tone VG-e* Carbo-Gel Pnrvtdes vtscosuy. weight luspvnaion, and Gelling Agent «nf. aad filtration i ' re t

IMCO KEN-X Cone #2 Petto-Tone

High Temperature IMCO KEN-X Du.««cn? HT DV-22 and Improves err uvm-n under h.-gh em joraturc Stabilver Cottr. »3 DV-33 conditions

Ktabiliset Borehole IMCO VR Cond I I Hint

Dispersant IMCO KEN-THIN

.OMC aad Driltreat

S tab iom rt.-ning shale, improvescmuitton. weight tuspenston. and fluid los» und .r Mgt. temperature condition*

. Venbtn and Dtsperaant for reduTtng rrtcoiogicai SE- I I jropertie*.

Calcium Oxide IMCO KENOX Calcium source for tap indication

•Itsct M«s« M M »w O.I P M . lat 183

' O W - A H M » L - t - J P R O D U C T S BY T R A D E N A M E S — C o n t i n u e d

^ascription IMCO SERVICES

Fatty Acid Emulsilier

E m i m o p StajbildrCT

Specifically Modii Saponified Fat'y A d d ChemiCiN

Finery Divided . . Silicate

MCC KEN-i l P . t M E C m.. A

IMCO AEN-SLPREMT Cone I

IMCO KET*-PAK

Berold Mcpcofaar Milchcm

OIL MUO AD i7!VES — I ntinuad O i u a n

Prwrtary Appl i cat i on

Prima rv emulsifier and uafcilieer lor od-baie dri! ing fluids

5-S5

.SF.lon

. Imc»ns pels, contributes to viscosity lor weii/iii «c%pen»»on. aad provide* filtration COWI-JI.

. Gellms * i i «.t for lormulat n had eeliation \mtxki

IMCO KEN-THERM

. Contributes 10 thiaotroptc praae.."fl t>id redixes thermal c induetivitv in Ht - lcat t •Ue-Paa.

NOYKS

184

ATTACHMENT 3

PLAN OF EXPLORATIWI

CHANDELEUR BLOCX 18

XS-G-6838

ENVIRONMENTAL REPORT

Hull*

i •

« ' • ••

1. T I T L E PAGE

ENVIRONMENTAL REPORT (PLAN OP EXPLORATION)

GUL*.' OP Mr XICO: OPPSHORE LOUISIANA AND M I S S I S S I P P I

CHANDELEUR AREA BLOCK 18 (OCS-G 6838)

ANADARKO PRODUCTION COMPANV

21 MAY 1984

MRS. M. T . MOPPETT ANADARKO PRODUCTION COMPANY 16801 GREENSPOINT PARK DRIVE

HOUSTON, TEXAS 770^0 (713) 999-0858

"AppUed Marine Science and Tec'mology"

P. 0. Box 3609 Jupiter/Tequesta, Plorida 33453

TAPCft OP CONTENTS

1. TITLE PAGE

LIST «jpj PIGURES 1

2. DESCRIPTION OP...THE PROPOSEO ACT .ON

(a) DESCRIPTION OP PROPCS'i^ TRAVEL MODES AND ROUTES AND FREQUENCY POR MOVING SUPPLIES AND PERSONNEL TO ANO PROM THE OFFSHORE ACTIVITY SITE AND THE ONSHORE BASES

(b) TDt VTIFICATIOV OF SUPPORT BASES AND NUMBER AND TYP.-.I. UF *!FW '..'ORKSHS ASSOCIATED WITH THE PROIOSSD ACTIVITIES. REPERBNCF IS ALSO MADE TO THE TOST CURRENT UPDATE OF THF SOCIOECONOMIC DATA CME REPORT

(C) IDENTIKICVTION Of THB NU.'̂ ER, LOCATION, AND SIZE OF ANY iJEW SUPPORT FACILITIES THAT WILL NEED TO BE PROVIDED FOR THE PROPOSED ACTIVITIES

(d) DESCRIPTION OF ANY MEW " "CHNIQUES OR UNUSUAL TECHNOLOGY. THAT MAY APF12CT COASTAL WATERS

(6) MAPS SHOWING LOCATION OF THE PROPOSED ACTIVITIES IN RELATION TO EACH OP THE AFFECTED STATB31 COASTAL ZONES

(f) POR DEVELOPMENT OPERATIONS COORDINATION DOCUMENTS, THE MEANS PROPOSED TO TRANSPORT OIL AND GAS TO SHORE PROM THE Li?ASE AREA AND THE ROUTES TO BE FOLLOWED AND THE ESTIMATED QUANTITIES GF OIL AND GAS TO BE MOVfcD ALONG SUCH ROUTES

1. DESCRIPTION OP THE AFFECT 3D ENVIRONMENT AND IMPACTS

(a) PHYSICAL AND ENVIRONMENTAL

(1) COMMERCIAL FISHING

(2) SHIPPING

(3) SMALL rRAPT PLEASURE BOAJNG, SPORT FISHING, AND RECREATION

! TABLE OP CONTENTS ( CONTINUED)

i

(4) CULTURAL RESOURCES

I i j (5 ) ECOLOGICALLY SENSITIVE FEATURES

(6) -EXISTING PIPELINES AND CABLES

(7) OTHER MINERAL USES

(8) OCEAN DUMPING A C T I V I T I E S

(9) ENDANGERED OR THREATENED SPECIES

(b) SOCIOECONOMIC

4. UNAVOIDABLE ADVERSE IMPACTS

(a) i < MrtARY OF THE UNAVOIDABLE ADVERSE IMPACTS (b) STATEMENT CONCERNING THE UNAVOIDABLE ADVERSE

IMPACTS 5. REFERENCES

6. FINAL STATEMENT

! LIST OP PIGURES

FIGURE DESCRIPTION PAGE

1 LOCATION OF CHANDELEUR AREA BLOCK 18 RELATIVE TO 2 I THE LOUISIANA AND MISSISSIPPI COASTAL ZONES.

1

,2. DESCRIPTION OF THE PROPOSEP ACTION

(a) DESCRIPTION OF PROPOSED TRAVEL MODES AND ROUTES AND FREQUENCY FOR MOVING SUPPLIES AND PERSONNEL TO AND FROM THE OFFSHORE ACTIVITY SITE AND THE ONSHORE BASES

j ' •

I Anadarko Production Company plans to conduct exploratory

activities, in Chandeleur Area Block 18. Helicopters and

boats w i l l move supplies and personnel to and from the

offshore and onshore locations. Helicopters w i l l make 14

round trips per week, crewboats w i l l make 10 round t r i p s per

month, and workboats w i l l make 15 round trips per month. I f

servicing only the proposed lease area, helicopters and boats

w i l l normally take the most direct route, weather and t r a f f i c

conditions permitting (see Figure 1). (b) IDENTIFICATION OF SUPPORT BASES AND NUMBER AND TYPES OF

NEW WORKERS ASSOCIATED WITH THE PROPOSED ACTIVITIES. REFERENCE IS ALSO MADE TO THE MOST CURRENT UPDATE OF THE SOCIOECONOMIC DATA BASE REPORT

The support base w i l l be located in Venice, Louis iana.

The base i s capable of providing the services necessary for

the proposed a c t i v i t i e s . No new f a c i l i t i e s or workers w i l l

be needed for the proposed a c t i v i t i e s . The i n i t i a l OCS

Socioeconomic Data Base Report w i l l be developed aftet the

Minerals Management Service (MMS) and the States of Alabama,

Louisiana, and Mississ ippi have ident i f ied the s p e c i f i c

parameters to be addressed in these semiannual reports .

(c ) IDENTIFICATION OF THE NUMBER, LOCATION, AND SIZE OF ANY NEW SUPPORT FACILITIES THAT WILL NEED TO BE PROVIDED FOR THE PROPOSED ACTIVITIES'

No new support f a c i l i t i e s w i l l be needed for the

proposed a c t i v i t i e s .

Ofl ANO CSI E •TEST DELTA

SCALE IN MILES 0 IO

•LOUISIANA ANO fcMBS^?J?^^S»iiiS

• MtS5!SSI*»*»l COASTAL 0 10 t O

ZONC SCALE IN KILOMETERS

FIGURE 1 . LOCATION OF CHANDELEUR AREA BLOCK 18 RELATIVE TO THE LOUISIANA AND MISSISSIPPI COASTAL ZONES.

(d) DESCRIPTION OF ANY NBW TECHNIQUES OR UNUSUAL TECHNOLOGY THAT MAY AFFECT COASTAL WATERS

No new techniaues or unusual technology will be used

during the proposed a c t i v i t i e s .

Je) MAPS SHOWING LOCATION OF THE PROPOSED ACTIVITIES IN I RELATION TO EACH OF THE AFFECTED STATES1 COASTAL ZONES

Figure 1 "shows the location of the proposed activities

in relation to each of the affected States' coastal zones.

The propoaed activities will take place in waters adjacent to

the States of Louisiana and Mississippi.

(f) FOR DEVELOPMENT OPERATIONS COORDINATION DOCUMENTS, THE MEANS PROPOSED TO TRANSPORT OIL AND GAS TO SHORE FROM THE LEASE AREA AND THE ROUTES TO BE FOLLOWED AND THE ESTIMATED QUANTITIES OF OIL AND GAS TO BE MOVED ALONG SUCH ROUTES

This Plan is exploratory. No o i l or gas will be

produced for sale froni these proposed activities at this

time.

3.. , DESCRIPTION OF THE AFFECTED ENV-RONMENT AWD IMPACTS

(a) PHYSICAL AND ENVIRONMENTAL

(1) Commercial Fishing

• 1 The proposed activities are located within some of

the mos.t productive fishing grounds in the Gulf of Mexico.

National Marine Fisheries Service 2one 11, which includes the

lease area, accounted for approximately 5% of the commercial

fisheries harvest from the western and central Gulf of Mexico

(USDOI, 1981, Visual No. 5; USDOI, 1983, Visual No. 4). Gulf

waters account for approximately 30% of the total annual U.S.

fisheries harvest (USDC, 1982).

The Gulf fishery i s dominated by the shellfish

fisheries. Shrimps, crabs, and oysters (with smaller amounts

of clams and scallops) are the most valuable fisheries and

are usually worth three or four times more than the greater

volume of finf i s h catch (USDOI, 1979). The USDC (1982) l i s t s the annual commercial fisheries landings statistics for the northern Gulf coast area onshore from the lease area. The shrimp fishery in the Gulf of Mexico includes the brown (Penaeus aztecus), white (P. setiferus), and pink (P. duorarum) shrimps. These species are taken almost exclusively by trawls in depths ranging from approximately 2 to 73 m (6 to 240 f t ) . These shrimps are estuarine-dependent species which spawn in the open ocean, go through a series of larval phases in the plankton, migrate during the po3t-larval

5

phase to the .estuarine nursery areas, and then return to the

open Gulf as adults. The USDOI (1977, Visual No. 5)

indicates the seasonal variation in the habits of each of

hese species. The lease area is located*within the major

shrimp spawning grounds and migration routes in the northern

Gulf (USDOI, 1983, Visual No. 4). Planktonic eggs and larval

stages of a l l commercially important shrimp species may occur

rar iod i c a l l y in the lease area.

The blue crab (Callinectes sapidus) maker, up 98% of the

crab harvest in the Gulf of Mexico (Riley, 1970). Its l i f e

cycle i s similar to the shrimps' in that i t has planktonic,

es' xrine, and open ocean phases. Adults spend most of their

lives in the estuaries; thus, the blue crab harvest is taken

primarily inshore of the lease area. Gravid females migr ue

to thw open Gulf to release their eggs during spring and

summer. Consequently, gravid females and planktonic larvae

nay n*lly in the lease area.

important finfish fishing grounds (USDOI, 1983, Visual Nc.

4). Three species of menhaden known from the Gulf make up

the major finfish tonnage taken. These are Brevoortia

patronus, B. gunteri, and B. smithi. Brevoortia palronus

comprises most of the Gulf catch. Purse seining i s the major

capture method used in this fishery (Lindall et a l . , 1972).

Red snapper (Lutjanuc campechanus) and various species

of grouper (i.e., the red groupar Epinephelus morio and gag

v r^aed activities are located within commercially

rye ter ope rea micro.1 e pi s> ->*»*• ':b«f commercial hook-and-1 ine

tishery of the ro* chern Guli <*f Me* ico. These fishrtr may be

taken over irregular botco.?. areas in depths pf 1 t.i X* m (5

to lj,aoo ft) (TerBco Corporation, 1976). ' *

^he striped mullet (Mugil cephalus) is generally found

in nearshore areas such as harbors, estuaries, nays, and

along beaches. I t is a schooling fish anci is generally taken

with seines and trawls.

The Atlantic croaker (Micropogonias undulatus) i s an

abundant fish in estuarine waters. Perre et a l . (1971)

reported croaker to be the most abundant juvenile commercial

fish taken in estuaries. Croaker is harvested and marketed

both as a food fish and as an industrial bottom fish (Lindall

et a l . , 1972).

The Plorida pompano (Trachinotus carolinus) i s primarily

an inshore fish that is taken mostly in the surf or at

passes. I t i s seasonally abundant (January to April) in

shrimping areas.

The Spanish mackerel (Scomberomorus maculatus) migrates

seasonally along the Gulf coast. It is generally taken in

nearshore areas.

The red drum (Sciaenops ocellatus) i s taken

predominantly in nearshore habitats, as are the sheepshead

(Archosargus probatocephalus), flounders, and the black drum

(Pogonias cromis).

Seatrouts, including the spotted (Cynoscion nebulosus),

the s i lver (C. nothus), and the sand (C. arenartua*, are

important to the bottom f i s h f i s h e r i e s in the rn Gulf

( L i n d a l l et a l . , 1972). They are usually takftn i'i offshore

areas with bottom trawls.

TerEco Corporation (1976) describes some addit ional f i s h

species of the northern Gulf which are important to

commercial and/or sport fishermen and their predominant

method of capture. Host of the northern Gulf f i shes are

temperate, with some ! rsions from Caribbean fauna. They

exhib i t seasonal dis tr ibut ion and abundance f luctuat ions

re la ted to oceanographic conditions (USDOI, 1983, pm 174).

Many of the coas ta l species ( e . g . , the croaker, Micropogonias

undulatus) are estuarine-dependent, because estuaries or

coasta l marshes are a c r i t i c a l habitat during some phase of

t h e i r l i f e c y c l e s . Rogers (1977) postulated net

inshore-offshore moveror ,t for many demersal shelf f i s h

spec ies . Thus, i t Li prob*'ale that many of those species may

occur in the lease area at some phase of their Life cyc l e s .

Eggs and larvae (ichthyoplankton) of various

commercially important f i sh species are probably also present

i n the lease area on occasion. Sixty-nine f i s h species have

been identif ied from zooplankton samples taken along the

northern Gulf coast . Dominant taxa were the fami l ies

Sparidae, Lutjanidae , T r i g l i d a e , Serranidae, and

Synodontidae. Stenototnus caprinus, Pristipomoides

a

aquilonaris, Prionctus par*latus, Serranus a'robranchus, and

Synodus foetens were the most important species (Chittenden

and Moore, 1976). Because the majority of ichthyoplankters

are at the mercy of water movements, their distributions vary

Considerably with space and time. The primary fac tors

,influencing"ichthyoplankton in the northern Gulf are the Loop

Current, the Mississippi River, and local runoff. Due to

"patchiness" in distributions, presence and abundance of

ichthyoplankton at any given instance cannot be predicted.

The proposed activities probably wil l temporarily

degrade the water quality in the immediate vicinity of the

d r i l i s i t e due to discharges of drilling fluids and cuttings.

This ma> cause certain fish species to avoid the area.

Commercial fishing may be affected temporarily. The

situation should revert to normal as soon as drilling is

complete Cumulative effects of increasing o i l and gas

activities off the northern Gulf coast on annual catches are

as yet unknown. However, there is no evidence to link o i l

and gas ac t i v i t i e s with declining yield per hectare of sea

bottom (USDOI, 1979, p. 182),

Any o i l s p i l l that would impact the seafloor could

conceivably k i l l benthic organisms such as shrimps or cause a

variety of sublethal effects. The potential long-term

effects of a s p i l l on the benthos are unclear because results

of hydrocarbon analyses are inconclusive (USDOI, 1979,

p. 160).

An o i l s p i l l wou?d temporarily degrade water gual i ty and

introduce toxins into the water. Ichthyoplankton, i f

cresent, may be k i l l e d or functional ly impaired. However,

nost adult f i s h e s encountering a s p i l l and associated toxic

weter would probably exhibit avoidance beha- ior. This e f f e c t

would "be temporary and f i shes should return to the area a f t e r

dispersal of the s p i l l . No s ign i f i cant or persistent d i r e c t

ef fects fron an o i l s p i l l on f i s h populations would be

expected. Recruitment from surrounding areas should quickly

replenish any affected ichthyoplankton populations once the

s p i l l has d ispersed. Any s p i l l would be handled according to

an o i l s p i l l contingency plan approved by the MMS.

(2) Shipping

The proposed a c t i v i t i e s are located approximately

8 km (4 NM) northwest of a fairway (USDOI, 1983, Visual No.

11). The proposed a c t i v i t i e s are rated as having minimum

potential impact on shipping as they are greater than 5 km

(2.6 NM) from a fairway (USDOI. 1979, p. 145). The offshore

structure w i l l be equipped with a l l safety equipment required

by the U.S. Coast Guard and the MMS to a l e r t shipr of the i r

presence ii» a l l weather conditions.

(3) Small Craft Pleasure Boating, Sport Pishing, and Recreation

D i t t o n and Graefe (1978) determined that o i l and

gab structures are the most popular offshore recreation

destination areas, attracting 87% of the boats that fished

offshore in their study area. Certain pleasure boats ( i . e . ,

sailboats, pleasure yachts, and/or open ocean racing power

boats) may be slightly inconvenienced.by having to maneuver

around the offshore structure and its support vessels. This

inconvenience i s considered extremely minor since offshore

structures can be avoided and ample maneuvering room is

available.

Any sports fishing which might occur in the lease area

could be temporarily affected by degradation of water quality

during d r i l l i n g . Such a change in water quality could cause

some desirable species to avoid the immediate lease area.

However, any such effects are expected to be temporary and

localized and should not affect any fishery potential in the

area as a whole. Populations should return to normal once

drilling is completed.

(4) Cultural Resources

Coastal Environments, Inc. (1977) has identified

two types of cultural resources which may be found in the

northern Gulf of Mexico area: (1) historic cultural resources

or shipwrecks and (2) Drehistoric cultural resources or

traces of previously undescribed human civilizations (USDOI,

1983, pp. 228-2*0). Approximately 82% of the known

shipwrecks are located within 10 km (5 NM) of shore, with

only a small percentage occurring on the outer continental

shelf (USDOI, 1979, p. 91). Known submarine archeological

sites are extremely rare, with none being identified to date

in Federal offshore leasing areas (USDOI, 1979, p. 91).

The proposed a c t i v i t i e s are located inside the Historic

and Prehistoric Cultural Resources High'Probability Lines

(USDOI, 1983, Visual No. 11) and therefore are in a large

offshore area where historic and prehistoric resources are

considered likely to be found. An Archer 'ical Survey was

required for this lease area. The results of this survey are

summarized below.

Eighteen magnetic anomalies, 14 of which are correlated

to man-made installations, were recorded. The four

unidentified anomalies probably represent localized

ferromagnetic debris on or immediately below the seafloor.

Side-scan sonar verified the presence of the Texas Eastern

Transmission Company's (TETCO) 8-in pipeline in the southwest

corner of Block 18. The pipeline is located approximately

159 m (850 ft) south-southwest of the d r i l l s i t e . This

pipeline and the four unidentified magnetic anomalies should

be ivoided during the proposed drilling activities. No

faults or arrol.cude anomalies suggesting shallow gas

accumulations were recorded. Side-scan sonar data depicted

the seafloor in Block 18 as devoid of any microbathymetric

features that could be interpreted as possible cultural

resources either in the form of shipwrecks or prehistoric

sites.

12

(5), Ecological ly Sens i t ive Features

Several areas of environmental concern are located

onshore of the lease area. Louisiana and Miss iss ippi have

developed Coastal Zone Management Programs to regulate the t

significant land and water activities between the outer limit

of each State's coastal waters and land up to the

Intracoastal Waterway and/or the 10-ft contour. Land uses

which are regulated are those that have a direct and

significant impact on the coastal areas requiring a State

permit, and those which are required by Federal law to be

consistent with the management programs (USDC and LDNR, 1980;

MDWC and USDC, 1980). The programs provide for the

protection of beaches, dunes, wetlands, submerged grass beds,

barrier islands, oyster reefs, cultural resources, water

quality, air quality, biological resources, and wildlife

habitJt. Unique ecological features include zoological,

botanical, and geological formations characteristic of

coastal processes (USDC and LDNR, 1980; MDWC and USDC, 1980;

Burk and Associates, 1975). Biologically sensitive areas of

the north-centrai Gulf area include estuarine and coastal

ecosystems comprised of s a l t marshes, oyster beds, grass

beds, barrier beaches, and dunes (Coastal Environments, Inc.,

1980). These coastal ecosystems contain nursery area? for

many species of economic importance as. well as habitat,

rookeries, major overwintering sites, and nesting areas for

many endangered and threatened species, such as the southern

bald eagle, brown pelican, golden eagle, osprey, red cockaded

woodpecker, American peregrine falcon, and various marine

turtles (USDOI, 1979, Visual No. 3; Coastal Environments,

line., 1980; USDC and LDNR, 1980; MDWC and* U6DC, 1980).

! There are two existing "Special Management Areas"

designated by*the Louisiana Coastal Management Program (USDC

and LDNR, 1980, pp. 104-108). These areas are the "Louisiana

Offshore Oil Port" (LOOP or Superport) and the "Marsh Island

Wildlife Refuge and Game Preserve." The lease area i s

located away from both of these areas. None of the proposed

activities in the lease area should have any effect upon

either area.

Mississippi designated three types of areas as current

or proposed Special Management Areas: ( i ) industrial and port

areas, ( i i ) shorefront access areas, and ( i i i ) urban

waterfront (MiTWC and USDC, 1980). Current Mississippi

Special Management areas are depicted by the MDWC and USDC

(1980, Figure Nos. VI-1 , VI-3, and VI-4).

Conspicuous areas of environmental concern for Louisiana

and Mississippi are noted by the USDOI (1979, Visual Nos. 1

and 4), the USDC and LDNR (1980, Figure No. D-1), and the

MDWC ̂ d USDC (1930, Figure Nos. VI-2 and VI-3).

7he coastal zone area i s also of recreational importance

to residents and tourists. Most recreational activities

focus on the area's water resources, which include beaches,

boating areas, and fishing areas.

Offshore terrestrial areas of particular ecological

significance to both Louisiana and Mississippi are the

barrier islands of Breton National Wildlife Refuge and Gulf

Island National Seashore. Submerged areas of c r i t i c a l i

concern are the extensive oyster grounds off Plaquemines and

St. Bernard Parishes, and the remnant coastal banks, which

are located off Mobile, Alabama (USDOI, 1979, Visual Nos. 4

and 5).

While o i l s p i l l s during drilling operations are rare

(Danenberger, 1976), the possibility of a s p i l l does exist.

Oil fouling in any coastal area could directly or indirectly

affect a variety of species, including threatened or

endangered species or species important to commercial and

sport fisheries. Direct effects on biota would include

fouling (particularly birds), suffocation (particularly

fishes and tu r t l e s ) , and tox'^i*/ from contact or from the

ingestion of o i l or contaminated food. Any of these effects

could be lethal, cause weakening, or cause a greater

susceptibility to predation. Significant ecological or

economic impacts could also result from the fouling of oyster

beds and habitat. Indirect effects would include the

destruction of c r i t i c a l habitat, especially breeding and

nursery areas. Any effects upon endangered or threatened

species would be significant.

Oil fouling of the coastal area could also have adverse

socioeconomic effects. Tourism .".s an important part of Gulf

coast economies. Removal of beach or other coastal areas

frora recreat ional use by o i l fouling would s i g n i f i c a n t l y

decrease tourism in the af fected area, causing loss of income

and a var ie ty of ripple e f f e c t s in loca l economies.

Any s p i l l would be handled according to an o i l s p i l l

contingency plan approved by the MMS. I f a s p i l l did occur

during operations, i t seems unlikely that i t would a f f e c t any

nearshore or onshore areas or resources.

(6) Ex i s t ing Pipe l ines and Cables

A TETCO 8-in gas pipel ine runs northwest to

southeasi. through the southwest corner of Block 18 (USDOI,

1984; McCracken, 1984). The pipeline w i l l be avoided during

the proposed a c t i v i t i e s .

(7) Other Mineral Uses

Other than potent ia l o i l and gas reserves, there

are no known mineral resources in the lease area.

(8) Ocean Dumping A c t i v i t i e s

The proposed a c t i v i t i e s are not located in an area

designated for ocean dumping a c t i v i t i e s .

(9) Endangered or Threatened Species

The USDOI (1979, p. 45) considers possible impacts

of lease a c t i v i t i e s on endangered species in this area of the

Gulf to be temporary, l o c a l i z e d , and chance occurrences. I t

has judged the potential impacts on endangered species to be

remote p o s s i b i l i t i e s without major potential for d i r e c t

effects on any single spec ies . In addit ion, i t has been

determined that lease a c t i v i t i e s w i l l not resul t in the

destruction or modification of designated c r i t i c a l habitats

or potential c r i t i c a l habi ta t s . Onshore f a c i l i t i e s are

located in a previously developed area and pose no new or

additional threat to endangered or threatened species.

Approximately six endangered species of cetaceans occur

in the Gulf of Mexico. They are the blue whale (Balaenoptera

musculus), f i n whale (Balaenoptera physalus) , humpback whale

(Megaptera novaeangliae), r ight whale (Eubalaena g l a c i a l i s ) ,

sei whale (Balaenoptera b o r e a l i s ) , and sperm whale (Physeter

catodon). General ly , most of these larger cetaceans occur in

continental s h e l f , slope, or deep oceanic waters (USDOI,

1981). The status and migration patterns of these species in

the Gulf of Mexico are unknown (Lehman, 1982).

Several endangered or th^*?atened species of sea t u r t l e s ,

including the Kemp's r idley aidochelys kempii), hawksbill

(Eretmochelys imbircata?, leatherback (Dermochelys cor iacea) ,

loggerhead (Caretta caretta) , and green (Chelonia mydas), may

occasionally v i s i t the lease area.

The primary danger to marine tur t l e s would be possible

co l l i s ions with boats. Adult t u r t l e s , e spec ia l ly

loggerheads, seem to be a t tracted tc offshore structures for

feeding and rest ing (USDOI, 1979, p. 165) increasing the

probability of c o l l i s i o n s . No c r i t i c a l habitat for any of

these species i s known to e x i s t in the lease area (USDOI,

1979, pp. 73-74) .

(b) SOCIOECONOMIC

The i n i t i a l OCS Socioeconomic Data Base Report will be

developed after the MMS and the States of Alabama, Louisiana,

and Mississippi have identified th' specific parameters to be

adtlre^s^'J in these semiannual :reports. No new personnel will

be needec*" for the proposed activities.

18

! • 4- UNAVOIDABLE ADVERSE IMPACTS

(a) SUMMARY OP THE UNAVOIDABLE ADVERSE IMPACTS

•''"-harge of dril l i n g muds and cuttings and air

emit during drilling operations will adversely affect i

mariiw •. an, isms, water and air quality, commercial fishing,

and ship navigation as described by the USDOI (1979,

pp. 229-231). These impacts are temporary, however, and w i l l

be limited to an extremely small area. They are justified by

the national interest in discovering and developing badly

needed reserves of o i l and gas. During the exploration

operations, a l l discharges will comply with a l l applicable

MMS and EPA requirements. No significant adverse impacts are

expected. The proposed activities covered by this Plan

should not result in unavoidable impacts on wetlands,

cultural resources, recreational a c t i v i t i e s , shoreline

aesthetics, or other land uses.

(b) STATEMENT CONCERNING THE UNAVOIDABLE ADVERSE IMPACTS

None of the environmental consequences expected during

normal operations should produce significant or cumulative

adverse environmental effects. The effects of a possible o i l

sp i l l should have no overall cumulative or long-term effect

on the environment, except in the possible event of

contamination of endangered marine species. \ spilT would be

handled according to an o i l s p i l l contingency plan approved

by the MMS., Thus, i t seems unlikely that a s p i l l would occur

during operations and affect any nearshore or onshore areas

or resources. The proposed activities should have no

significant impact on endangered species or c r i t i c a l habitat.

tPhe information presented in this Environmental Report

indicates no clear or present reason not to proceed with the

proposed acti v i t i e s . Withdrawal of the Plan would result in

the loss of potential hydrocarbon production from this area.

21

Perret, W. S.. B. E. Barrett, W. R. Latapie, J. F. Pillard, W. R. Mock, C. B. Adkins, W. J. Gaidry, and C. J. White. 1971. Cooperative Gulf of Mexico Estuarine Inventory and Study, Louisiana. Phase I , Area description. Phase IV, Biology. Louisiana Wildlife andt Fisheries

: Commission.

Riley, F. 1970. Fisheries of the United States, 1969. f U.S. Department of the Interior, Bureau of Commercial

Fisheries. C.F.S. No. 5300. 87 pp.

Rogers, R. M., Jr. 1977. Trophic interrelationships of selected fishes on the continental shelf of the northern Gulf of Mexico. Ph.D. dissertation, Texas A&M University. 229 pp.

TerEco Corporation. 1976. Ecological Aspects of the Upper Continental Slope of the Gulf of Mexico. A report to the U.S. Department of the Interior, Bureau of Land Management, Gulf of Mexico CCS Office, New Orleans, LA. Contract No. 08550-CT4-12.

U.S. Department of Commerce. 1982. Current Fisheries Statistics No. 8200. Fisheries of the United States, 1981. U.S. Department of Commerce, National Oceani and Atmospheric Administration.

U.S. Department of Commerce and Louisiana Department of Natural Resources. 1980. Louisiana Coastal Resources Program Final Environmental Impact Statement. Louisiana Department of Natural Resources, Baton Rouge, LA.

U.S. Department of the Interior, Bureau of Land Management. 1977. Final Environmental Impact Statement. Proposed 1977 Outer Continental Shelf Oil and Gas Lease Sale 47, Gulf of Mexico.

U.S. Department of the Interior, Bureau of Land Management. 1979. Final Environmental Impact Statement. Proposed 1979 Outer Continental Shelf Oil and Gas Lease Sale 58A, Western and Central Gulf of Mexico. 181 pp.

U.S. Department of the Interior, Bureau of Land Management. 1981. Final Environmental Impact Statement. Proposed 1981 Outer Continental Shelf Oil and Gas Lease Sales 67 and 69, Gulf of Mexico. 300 pp.

U.S. Department of the Interior, Minerals Management Service. 1983. Final Regional Environmental Impact Statement. Gulf of Mexico. 1,004 pp.

U.S. Department of the Interior, Minerals Management Service. 1984. Personal communication. OCS Office, Metarie, LA.

! 5. REFERENCES

Burk and Associates , I n c . 1975. Louisiana coastal resources inventory. Vol. I . Geographic Areas of P a r t i c u l a r Concern. New Orleans, LA.

bhittenden, M. E . , J r . and D. Moore. 1976. Composition of ( the ichthyofauna inhabit ing the 110-m bathymetric

contour of the Gulf of Mexico, Miss iss ippi River to the Rio Grande. Department of Marine Resources Information Center for Marine Research, Texas A&M Univers i ty . 15 pp.

Coastal Environments, I n c . 1977. Cul tura l resources evaluation of the northern Gulf of Mexico. National Park S e r v i c e , Washington, D.C.

Coastal Environments, I n c . 1980. CPA-2, Offshore Miss iss ippi-Alabama-Florida, b io log ica l ly sens i t ive areas . Baton Rouge, LA.

Danenberger, E . P. 1976. O i l s p i l l s , 1971-1975. Gulf of Mexico outer continental she l f . Geological Survey C i r c u l a r No. 741.

Ditton, R. B . and A. R. Graefe . 1978. Recreational f i shery use of a r t i f i c i a l ree f s on the Texas coast. Department of Recreational Parks , Texas A&M Univers i ty . 155 pp.

Lehman, J . 1982. Personal communication. Minerals Management Service, OCS O f f i c e , Metaire, LA.

L i n d a l l , W. N . , J r . , J . R. H a l l , J . E. Sykes, and E . L . Arnold, J r . 197?. Louis iana coastal zone: Analyses of resources and resource development need in connection with estuarine ecology. Sections 10 and 13, Fishery Resources and their Needs. Report to the U.S. Army Corps of Engineers, New Orleans, LA. Contribution No. 14-17-002-430. 323 pp.

McCracken, N. 1984 (personal communication). Texas Eastern Transmission Corporation, Houston, TX.

Mississ ippi Department of W i l d l i f e Conservation and U.S . Department of Commerce. 1980. Miss i ss ippi Coastal Program, NOAA Off ice of Coastal Zone Management, Washington, D.C.

. . . 6. PINAL STATEMENT

To the best of our knowledge, the set of findings

included in the Environmental Report and Plan indicates that

'each of the proposed a c t i v i t i e s , their associated f a c i l i t i e s ,

and effects,, are a l l consistent with and comply with the

provisions and guidelines of the Louisiana and

Mississippi-approved Coastal Zone Management Programs, The

proposed a c t i v i t i e s w i l l be conducted in a manner consistent

with the Coasta l Zone Management Program as outlined in USDC

and LDNR (1980) and MDWC and USDC (1980),

The proposed a c t i v i t i e s w i l l be carried out and

completed with the guarantee of the following items:

1. The best available and safest technologies w i l l be

ut i l ized throughout the p r o j e c t . This includes meeting a 1 T

applicable requirements for equipment types, generr - *wct

layout, sa fe ty systems, and equipment and iron\tor>'w

systems,

2. A l l operations w i l l be covered by *n o i l s p i l l

contingency plan approved by the MMS.

3. A l l applicable Federa l , State and loca l

requirements regarding a i r emissions, water gual i ty , and

discharge for the proposed a c t i v i t i e s , as wel l as any other

permit condit ions , w i l l be complied with.

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CHANDELEUR B L O C * 18

demotion. EflaagJj • , t i e d i s t a n c e t o 1 C h a n d e l e u r B l o c k 1 8 f r o m t h e c l o s e s t o n s h o r e a r e a o f a s t a t e 1 s

( a p p r o x i m a t e l y 3 9 m i l e s . T h e c e n t e r o f C h a n d e l e u r B l o c k 1 8 i s a p p r o x i m a t e l y 2 9 * ' 4 7 ' n o r t h a n d l o n g i t u d e 8 8 " 4 2 ' w e s t . T h e c l o s e s t o n s h o r e a r e a o f a s t a t e 1 s t h e c o a s t l i n e o f P a s c a g o u l a . M i s s i s s i p p i a t a p p r o x i m a t e l y l a t i t u d e 3 0 ° 2 4 ' n o r t h a n d l o n g i t u d e 8 0 ° - 3 4 * w e s t - T h i s d i s t a n c e p r o d u c e s e x e m p t i o n a m o u n t s o f 1 2 9 9 t o n s / y e a r f o r p a r t i c u l a t e s , s u l p h u r d i o x i d e , n i t r o g e n o x i d e s a n d v o l a t i l e o r g a n i c c o m p o u n d s a r i d 3 9 . 0 9 2 t o n s / y e a r f o r c a r b o n m o n o x i d e -

P r o j e c t e d E m i s s i o n s

T h e s i x p r o p o s e d w e l l s i n t h e P l a n o f E x p l o r a t i o n a r e a s f o l l o w * *

P r o p o s e d w e l l s P r o p o s e d M e a s u r e d D e p t h

B l k 1 8 N o . 1 5 , 0 0 0 * D l k 1 0 N o . 2 5 , 8 0 0 ' B l k 1 8 N o . 3 5 , 7 0 0 * B l k I B N o . 4 6 . 5 0 0 1

B l k 1 8 N o . S 5 , 8 0 0 " B l k I B N o . fi 6 . 9 0 O '

TOTAL F E E T D R I L L E D 3 5 » 7 0 0 '

A s s u m i n g 6 0 h o r s e p o w e r h o u r s r e q u i r e d t o d r i l l o n e f o o t * 1 * o n a n o f f s h o r e o i l a n d 9 0 s d r i l l i n g r i g , t h i s p l a n w i l l r e q u i r e 2 , 1 4 ? , 0 0 0 h o r s e p o w e r h o u r s t o c o m p l e t e . U s i n g t h e • m i s s i o n f a c t o r s f o r d i e s e l - p o w e r e d i n d u s t r i a l e q u i p m e n t f r o m T a b l e 3 . 3 . 3 - 1 o f E P A p u b l i c a t i o n A P - 4 2 , C o m p i l a t i o n o f A i r P o l l u t a n t E m i s s i o n F a c t o r s , e x p e c t e d • m i s s i o n s a r a as f o l l o w s :

P o l l u t a n t T o t a l T o n s

C a r b o n M o n o x i d e 7 . 1 5 N i t r o g e n O x i d e s 3 3 . O f i H y d r o c a r b o n s 2 . 6 4 S u l p h u r D i o x i d e 2 . 2 0 P a r t i c u l a t e s 2 . 3 6

E m i s s i o n s d u e t o s u p p o r t b o a t s a n d h e l i c o p t e r s a r e t a b u l a t e d b e l o w :

P o l l u t a n t T o t a l T o n s

C a r b o n M o n o x i d e N i t r o g e n O x i d e s H y d r o c a r b o n s S u l p h u r D i o x i d e P a r t i c u l a t e s

( 2 )

Page 2 I

Combining the anticipated emission* from tne preceding tables y i e l d s the following t o t a l emissions expected from t h i s plant

Pollutant Total Tons

1 Carbon Monoxide 61.15 I 4 Nitrogen. Oxides 83.99

>' Hydrocarbons ' f Sulphur Dioxide S.58

P a r t i c u l a t e s 5-99

S i n c e none of these amounts approach 1299 tons (39.092 tons for carbon monoxide), we' request that you determine under Section 250.57(d) that the Plan of Explore-t i o n for C.andeleur Block 18 be exempt from f-jrther o l r quality review.

fCVnl 5/23/84

( 1 ) Atmospheric emissions from offshore o i l and gas development and production (E»A-4S0/3-??-206. June 1977).

( 2 ) See attached detailed emission c a l c u l a t i o n s .

. ! • DETAILED EMISSION CALCULATIONS FOR SUPPORT

BOATS AND HELICOPTERS

Cro- Boat

P o w e r e d B y t h r e e 1 2 V - 7 1 N G e n e r a l M o t o r s d i e s e l e n g i n e s ,

E m i s s i o n s ] f o r o n e G e n e r a l M o t o r s 1 2 V - 7 1 N e n g i n e s

d u e l C o n s u m p t i o n • 0 . 3 8 S 1 b / B H P / H R • 3 4 0 H o r s e p o w e r

D i e s e l

C o n s u m p t i o n

C o n v e r s i o n F a c t o r

F r e a u e n c y o f u s e - 7 h o u r s p e r t r i p , I O t r i p s p e r m o n t h - 0 . 0 9 7 y e a r s

• 7 . 3 l b / g a l

17-93 IOOO

2 4 X

7 . 9 3 g a l / h r X . 7 5 iffi 0 . 0 5 8 9 . 1 0 O g ^ M l - W M

C a r b o n M o n o x i d e • 1 0 2 l b / l O O O g a l N i t r o g e n O x i d e s - 4 6 9 l b / 1 0 0 0 g a l H y d r o c a r b o n s - 3 7 . 6 l b / l O O O g a l S u l p h u r D i o x i d e - 3 1 . 2 l b / l O O O g a l P a r t i c u l a t e s - 3 3 . S l b / 1 0 0 0 g a l

( F a c t o r s f r o m A P - 4 2 T a b l e 3 . 3 . 3 - 1 )

0 . 0 5 B 9 O . 0 5 8 9 O.O539 O - 0 5 8 9 0 . 0 5 8 9

) t n r ( F u l l T i m e ) I n o i n e 3 E n g i n e s

0 .01 2 7 . 6 2

2 . 2 1 1.04 1 .97

1 0 . 0 3 8 2 . 8 8

6 . 6 3 5 . 5 2 5 . 9 1

Tons/Tr (Actual)

1.75 8.04 0.64 0.54 0.57

Work Boat

Powered by two D 398 C a t e r p i l l a r engines

Emissions for one 0 398 C a t e r p i l l a r engines

Fuel Consumption « 45 gal/hr Converslon Factor • gffip X %C * IflOO^

Frequency of use - 14 hours par t r i p , 16 t r i p s per month - 0.3? years

o.i«o ' W ? b # -tons

Carbon Monoxide Nitrogen Oxides Hydrocarbons Sulphur Dloxloa P a r t i c u l a t e s

102 lb/1000 gal X 0.148 469 lb/lOOO gal X 0.148

37.5 lb/lOOO gal X 0.14S 31.2 lb/lOOO gal X 0.148 33.5 lb/1000 gal X 0-148

QOaYY^ i F y " T1fW>. i E n g i n e 3 E n g i n e s

1 5 - I O 6 9 . 4 1

5 . 5 5 4-62 4 . 9 6

30 .20 13a.32

16.65 9 .24 9.92

( A c t u a l s

9 . 0 6 4 1 . 6 8

5 . O 0 2 . 7 7 2 . 9 8

( F a c t o r s f r o m A P - 4 2 T a b l e 3 . 3 . 3 - 1 )

D E T A I L E D EMISSION* C A L C U L A T I O N S FOR SUPPORT BOATS ARO HELICOPTERS P A O E Z

F u l l u s a g e « 4 5 Q m . / h r ( g a s o l i n e ) ,

1 F r e q u e n c y o f u s e - 1 h o u r p e r t r i p . 1 4 t r i p s p e r w e e k - 0 . 0 8 3 y e a r s ' - j L c t AS - 2 4 X 3 6 6 X . 7 5 Q " 1 A o IOOO g a l - t o n s

C o n v e r s i o n F a c t o r « T o o o x 2 0 0 0 O . I A * i b - y r

T o n s / V r f P u l ! T 1 n e >

5B3 15 .01 19. SA 0 . 7 9 0 . 9 6

T o n s / Y r ( A c t u a l 1

A 3 . 3 9 1 .24 1 .62 0 . 0 7 O.OB

C a r b o n M o n o x i d e - 3 9 4 0 l b / l O O O o a i X 0 . 1 4 8 -N i t r o g e n O x i d e s » 1 0 2 l b / l O O O g a l X 0 . * 4 8 -H y d r o c a r b o n s » 1 3 2 l b / 1 0 0 0 g a l x 0 . 1 4 8 « S u l p h u r D i o x i d e - 5 . 3 1 l b / l O O O g a l X 0 . 1 4 8 -P a r t i c u l a t e s • 6 . 4 7 l b / l O O O g a l X 0 . 1 4 8 -

( F a c t o r s f r o m A P - 4 2 T a b l e 3 . 3 . 3 - 1 )

T o t a l e m i s s i o n s d u e t o s u p p o r t b o a t s a n d h e l i c o p t e r s a u r i n g t h e P l a n o f E x p l o r e 1 1 o n t

P o l l u t a n t

Carbon Monoxide • Nitrogen Oxides m

Hydrocarbons • Sulphur Dioxide • P a r t i c u l a t e s •

1 . 7 5 8 . 0 4 0 . 6 4 0 . 5 4 0 . 5 7

9 . 0 6 • 4 3 . 3 9 -4 1 . 6 5 • 1 . 2 4 -

5 . 0 0 • 2 . 7 7 * 2 . 9 8 *

1 .62 -0 . 0 7 -0 . 0 8 »

5 4 . 2 0 50 .93

7 .26 3 . 3 8 3 . 6 3

K . M / n l 5 / 2 3 / 8 4