In Reply *>Or Tn: RP-2-]

Chevron I'.S.A. Inc. Attention; Hr. N. *. Herrln Post 0<*1c* Box 61990 tic* Crl cans. LmrUUr.* 7016*

Gentlemen:

Reference 1$ made to your In* t*1 Plen ot Explo*°atW end Environmental Report received decemW 4, l9flf, frr Lee*' OCS-G 5515, Bloc* 323, tu«- «.«.• Island Area. This plan Includes rhe activities proposed fnr Hells A .nrotigh f».

In accordance with 30 CP? ?50.34, revised Decruner 13, 1979, and our letter dated January 25, 1979, M t plan nas been determined to be complete as of Qpcembor IB, ;985, and 1s now b*-lno conslde«-ed for approval.

Tour plen control number is N-2359 and should HP referenced in your cnmeunlca-tlnu end cr respondent© concerning this plan.

bcc: Lease OCS-G 5515 (OPS-3-2) (FILE f!0OM) /OPS-3-4 w/Public Info. Copy of the plan and ER (PUBLIC RECORDS ROOM)

S l l l C e r r l y y o u r s ,

(Ofe 8fd4 A. Donald Gin*

*ct»nQ Regional Supervisor Rules tnd Prrductiop

MJT01b«rt:rbr: 12/5/85 Disk 3B

LTtevron Chavrun U.SA Inc. P. 0. Box 61990. New Orleans. LA 70161

December 3, 1985

Plan of Exploration Eugene Island Block 323 OCS-G-5515

U . S. Department of the Interior Minerals Management Service P. O. Box 7944 C : C

Metairie, LA 70010-7944 ' * 0

Gentlemen: • -•

Chevron U.S.A. Inc . , operator for the Eugene Island Block 323 OCS-G-5515 lease, anticipates that as many as four (4) wells may be necessary to explore the hydrocarbon potential of this tract.

1. The location of tho lour (4) proposed wells are as follows:

Well Surface Location

"A" 750 FSL i 2000' FfcL Eugene Island 323

n B " 2150' FSL ft 5300' FEL Eugene Islhnd "3

"C" 7700' FSL ft 3J00' FEL Eugene Island 323

"D" 5100' FNL ft 6775' FEL Hugene Island 323

Water Depth : ±250'

A geophysical check shot velocity survey is planned in the f i rs t well Hther at total depth or some lesser depth uti l izing an air gun as an energy source and an in-hole geophone ae a receiver.

2. An archaeological survey cf Eugene Island Block 323 is not required under the terms of the lease; however, this lease is subject to the Archaeological Area Stipulation (Stipulation #1).

311/191 PUBLIC MF0RM4TI0*' Eastern Region Explotation, Land & Production

U . S. Department of the Interior -2 - December 3, 1965

3. We plan to utilize a jackup r i g similar to the I'enrod 60" to dr i l l these wells (specifications attached).

Safety features will include well control and blowout prevention equip­ment at least as good as described in OCS Order 2. Appropriate l ife ra f t s , l ife jackets, r ing buoys, etc. as prescribed by the U.S. Coast Guard, will be provided. Pollution prevention and control features will include all necessary coaming drains and holding tanks to prevent con­tamination of the sen in accordance with OCS Order No. 7, "Pollution and Waste Contro l . "

The f i r s t well , OCS-G-5515 " A " , is currently scheduled for dr i l l ing in the f i rs t half of 1986.

4. Onshore Facilities

The service base for this area will be Morgan City, Louisiana. Numer­ous service facili t ies, including mud companies, pipe companies, dock space, warehouse, helipads and the like are found here. These existing facilities will be utilized and are considered adequate to handle the various jobs without any expansion or signify ant changes in activity levels.

5. Oii Spill Contingency Plan

Chevron U .S .A . Inc. 's "Oil Spill Contingency Manual" was approved on August 9, 1985. Chevron maintains at its own expense various types of equipment to deal with oil spills. Included are booms, large and small vessels, skimmers and the l ike. Additionally, Chevron is a member of Clean Gulf Associates. In the unlikely event that a spill occurs, even though it may not be originated with a Chevron operation or faci l i ty , an alert procedure is immediately inst i tuted. Immediate notification is made to the Division Manager level and to appropriate Federal and State agencies. At the same t ine , efforts are begun to stop and contain the spill and to assess what, i f any, equipment will be needed.

I f the spiU is too large for the on-site personnel to control, Company equipment, facilities and personnel will be immediately marshalled and, i f reeded, Clean Gulf Associates will be called i n . Chevron's base at Bayou Boeuf (Morgan City, Louisiana; is on a continual standby basis with appropriate contingency responses assigned to i t . Clean Gulf Associates maintains facilities and equipment at Intracoastal City. It is anticipated that n maximum of 8-10 hours would be required to have onshore spill clean-up transported to this area.

6. Air Emissions/Environmental Reports

The Air Emissions/Environmental reports for the - r i l l ing equipment to be used for Eugene Island Block 323 are enclosed.

311/191 PUBLIC INFORMATION

U. S. Department of the Interior 3- December 3, 1985

7. Consistency Statement

A Consistency Certificate pledging our compliance with Louisiana's Coastal Zone Management is attached.

8. To comply with requirements of 30 CFR 250.34, the following information is attached:

Location Plat Vicinity Map Rig Schematic - Specification Coastal Zone Management - Consistency Certificate Critical Operation* at.d Curtailment Plan Mud Additives, Drilling Fluids, etc. Air Emissions Report Environmental Report

Chevron L.S.A. Inc. believes that the geological structure map and schematic cross-section map submitted are exempt from disclosure under the Freedom of Information Act and .should, therefore, not be made available to the public or provided to any affected State or to the executive of any local government.

If any additional information is required, please contact Ms. Sandy Bergeron at (504) 582-7625.

Yours very truly,

//* W. R. Herrln Division Manager Southwestern Production Division

SMB.-311/191

Attachments

311/191 PU0UC INFORMATION

CHEVRON (QULF) OCS-G-5515

WOT!; TO or TVD all wolta 12,000*

323

(S.L.) *

• C ' 3 3 0 0 *

•too'

O m z m w r > z o

5 2 0 0 0 "

CHEVRON OCS-G-1535

296

o >

B

EUGENE ISLAND BLOCK 3 2 3

PROP. SURF. LOCATIONS SCALE 1 ' : 2 0 0 0 '

CHEVRON U.5.A. INC. EASTERN REGION

CENTRAL DIVISION

Critical Operations and Curtailment Plan

Personnel salety and environmental protection have highest priority whan conducting any operationa. Preplanning and work scheduling ara made with these factors in mind.

Chavron recognizes tha offshore operating hazards and tha possibility of marina environment contamination. Every effort will be made to minimize the pollution possibility and to provide maximum safe working conditions for all personnel.

Listed below are operations which are considered to be critical.

1. Shallow rjrllllnK Hazards - A shallow drilling hazards report will be submitted as required in Sec 2.3 of OCS Ordar 2. Upon encounterng shallow hazards, wall will be controlled In accordance with Chevron's USGS appr-wed "Wall Control and Blowout Prevention Guide".

2. Drilling ln Close Proximity to Producing Wells - Operations all be conducted as outlined in Chevron's Multiple Operations Guidelines.

3. Moving Driillnz Rigs On and Off Locations in Emergencies - Floater rigs and bonom setting drilling units will be secured by use of either hurricane plugs, cement, or BOP closure, if possible, when necessary to move rig off In emergency conditions.

*. Testing of Blowout Preventors - Drilling operations will not proceed until such time as the blowout preventor stack has been completely and successfully tested in accordance with Sec 5.7 of OCS Order #2.

3. Well Kicks - After experiencing a well kick, drilling operations shall not be continued until such time as the wellbore is stable, safely overbalanced, and properly conditioned, in accordance with Chevron's USGS approved "Well Control and Blowout Prevention Guide".

6. Running and Cementing Casing -55 The well is to be carefully monitored during the last trip in the hole with

drill pipe prior to running casing. b) The mud weight shall be determined to be adequate to control formation

pressures in hole which is to be cased off. c) The well will be checked for normal hole flllup and mud displacement on

trip out of hole with conditioning assembly, and while going in hole with casing.

d) Flow line returns will be monitored while circulating or cementing. e) If a casing string sticks before reaching the desired depth and cannot be

freed, plans are to cement it in place, and notify proper USGS authority.

Critical Operations and Curtailment Plan

-2-

7. Nippling Up and Nippling Down Blowout Preventors - BOPs will not be nippled down unless well is deenied to be in a sale condition. Safety of personntl is of highest priority during nipple up and nipple down operations, and usa of life jackets, safety lines or nets, and adequate pick-up lines by contractor personnel will be strongly encouraged.

S. Minimum Mud Requirements at WeU Site - Drilling will not proceed, when minimum amounts of mud materials or barite fall below minimum requirements of OCS Order #2, as specified on drilling program submitted with permit to drill. Greater than minimum amounts will be kept on location in most cases, and as deemed necessary by operator representative.

9. Logging and Wireline Operations - The mud weight shall be adequate to contain any exposed formations. The well will be monitored for flow during logging operations, and kept full at all times.

10. Hurricane Approach - Emergency procedures are provided for securing the well and evacuation of personnel in storm or hurricane situations.

11. Critical Welding and Burning Operations - Critical welding and burning operations will be conducted as outlined in Chevron's "Multiple Operations Guideline".

12. Drill Stem Testing and Production Testing - Drill stem testing and production testing will be performed in accordance with Chevron's "Multiple Operations Guidelines".

13. Plugging and Abandonment - The well will plugged and abandoned in accordance with OCS Order #3. Plugging will not commence ii the well is not under control. Blowout prevention equipment will not be removed prior to placement of surface plug. The OCS orders will be followed during the cutting and removal of casing and clearing the location.

1*. Person In Charge - The person in charge at the site of all drilling operations for which Chevron is operator will be the Chevron operator representative. The immediate supervisor of the operator representative will be the Division Drilling Superintendent, Mr. L. C. Richie. The Division Drilling Superintendent, or his designated alternate, will be available to advise on matters concerning critical operations or curtailment of drilling operations.

3E/R3*6

PRILLIHC FLOP COMPOIITIOM

C e l , Freah Water - Ben cool t« Gel , Salt Watar - Attapulgite Clay Bar! tea - Bari.'w lul f ete Freah Hater ar. I/or See Hater

CHEMICALS ft Appimrgg

Aluminum Iterate A-Z-32 - Biodegradable surfactant Barafloc, Flocculant - Poiymar Ben-Ex. Flocculsnt-Polymer Cauatic Soda - Sodiua Hydroxide Chrone Llgnasulfonete

C . L . S . - Chroas Llgnoeulfonate Q-Broxin - Ferrochroas Lignosuifonate Spersene - Chroas Lignosuifonate Uni-Cal - Sodlua Lignosuifonate

Lignite Lenox - Lignite Tannathin - Lignite Ligco - Lignite

Lias - Calclua Hydroxide NPL-AO - Biodegradable-Surfactant Soda Ash - Sodlua Carbonate Sodlua Bicarbonate Sodlua Bichromate Sodlua Acid Pyro Phosphate (SAPP) Carboxyl Methylcellulose (CMC)

LOST CIRCULATION MATERIAL

Mice Walnut Shells Cellophane Plakes Fiber

STUCK FIFE

Diesel Oil Pipe Lax - Surfactant Aromatic Proceased Oil (Organic) Oil Fase - Fatty Acid - Resins Baulslfers deys Black Magic - air Blown Aaphalt

Chemical *V' - Rosin acids Chemical "V" - Haphtenic Acid

OB Cel - Organo - Bentonitic Cleys r

All liquid aud will bs disposed of ln coapllancs with BFA requireaents.

PENROD 60 OFFSHORE MOBILE DRILLING PLATFORM

300* WATER DEPTH NON-HURRICANE CAPABLE OF DRILLING 30.000* DEPTH

DRAWWORKS:

National 1320 UE drawworks, with sandreel and s Par mac V-293 hy dramatic brake, drawworks driven by 2 EMD D-79 electric motors rated at 2000 hoisting HP.

POWER:

Three EMD 16-645E1 Diesel engines. Each engine is rated at 1950 continuous HP or 2200 intermittent HP and drives one 1500 KW, 600 volt AC generator. A solid state rectifying system is used to convert AC power to DC power ior drilling functions. Generator Is 60 cycle.

MUD PUMPS: a*

Two Continental-Emsco Model F-160G super charged triplex mud pumps. Each pump independently driven by two EMD D-79 electric motors rated at 1600 HP.

DERRICK AND SUBSTRUCTURE:

Lee C. Moore 1*7* high by 30* base, beam leg derrick with a gross capacity oi 1,320,000 • Ibs. N&tlor.aJ 760-F 630 ton crown block and an adjustable casing stabbing platlorm. 20*'

high substructure designed for 6 wells on 7 1/2* centers with a 900,000 lb. rotary and 701,000 lb. setback capacity.

7R-ASLINC EQUIPMENT:

National 660 C 50C -.on hook block: National P-650 650 ton swivel and 1 3/8" drill line.

ROTARY:

Nil >-.a! C y : rotary, with 37 l / T table c;,er.-j independently driver- by er, EMD D-79 DC eiectrit r,o:o* vitr a National 2 sp ed ;ra - a nl-s'.on.

ML D MIXING:

T - . r f x S centrifugal p-i-ps. Each pump peered by a 100 KP AC e'ecirir

r <• 1

. PENROD RIC 60 LET. HULL #53 OFFICIAL #535419

LAST RKV. DATE - 7-7-7S - BUILT 1971

Pull Length fc Width 231'x200.3' Basic Hull fc Gear Units 6,8 2 8,210 f>

Hull Width Inc. Heliport 223'® Leg Weight-3 Lags w/ 467' 7,347,504*

Hull Depth 26* Lightship Less Fixed 6,173,714

He. of Cranes 3 Total Fixed Load 3,S27.157#

Gear Hack 26' Lightship fc Fi d Less Subst. 17,233,211

Hull fc Gear Rack 52' Max. Var. Load Allowed 4.172.. 84 3f

Let Length 467' Hex. Fixed and Var. 8,000,oobc

Dist. Porc-Stbd. Legs 142* Preload 5,000,000*

Dist. Bow-Aft Legs 142' Substructure 769,660#

Bow Leg LCC 40» Total Lightship 18.002,871

Aft Legs LCC & TCC 163.5 ,-'i' Max. Imposed L'-ad Allowed 27,175,714

Car. Dia. 46' Lightship Less, substructure LCC m.*7 v

bearing Pressure (1 Car.) 55001b. f t 2 ® Lightship VCC-Legs 12' Below Hull

Points 12' L CC 204.85*

Cas Wall None AJL 121.95*

Can Wall & Poir.cs 12' L.C.B.

Can Height In:. Doae 2-' Totsi Ir.depsndent f"*ar Unit 308.9211 Load vt Max. Var.

308.9211

Deep-Well Tower 127.C Bow Prop. Unit LCC—TCC

Deep-Well Below Kull 98.5' Stbd. Prop. Unit LCC-TCC

Slot Length S Width 41,x50* Port Prop. Unit LCC-TCC •

Degree Stern Rake 13° Weight of Prop. Unit w/ Motor

Hull Draft w/ Max. Var. 16.91' Max. Crew Quarters 79

Displacement (long tons) Ligbtship8035.8 tons Heliport Sise 70'

Displacement (long tons) Max. Var.9,G99.9 tens Heliport Capacity S-61

Vax Abs Losd Line 16* 7 y Total Potable Water Csp. (bbls) 862

Min. Vater Depth 29' Total Fuel Cap. (bbls) 6004®

Max. Vater Depth 340' Total D r i l l Uater Cap. (bbls) ' 4644®

D r i l l losttlon #1 205' Min. Leg Below Hull 12*

D r i l l Position #2 . 212.5' . . 1st Tow Position (Can Below Hull) 12'

D r i l l Position #3 2nd Tow Position (Can Below Hull) 47'

(J) V i t h Sake on St era - VAr. wich Draf t 5 I - .c ludlng Ctaiblnattan 7-r.ks T; l e t s at Max.' Elsvatisr.

Q ":-s .75 ' f e r ^ n l r - . ' f o a

FOt'TNw f£S £5> *ull Length T-cJuies Heliport ® Cne Cm !*47 f t 2 Vjs.rlng 25' Per.etratloo

!!ax, Variable f. ?:*\-xd !D Vt 1 *r: sit s " r f - rn j

_ 4 6 ' -

R\GS & 6 , 6 a i V » ARE 4 G>% FROM P05.T a o T T o r A X o C A M POlWT.

"7*

4> D U M * VALVE

• F I L L V A L V E

£ EQUALIZER

ENVIRONMENTAL REPORT (EXPLORATION) EUGENE ISLANO BLOCK 3/3 (0CS-G-5515)

LESSEE/OPERATOR: CHEVRON l l . S. A. TNC.

November 21 , 1 085

CONTACT PERSON:

Ms. R.H. T u f o u r Env i ronmen t , S a f e t y , F1re A H e a l t h

D i v i s i o n C o o r d i n a t o r Chev ron U . S . A . I n c . P.C. Box 61990

Now Or i pans, l o u i s i a n a V M M

Tnlephone: (504) 582-7605

""•"Mis •wwGfworr soma

DEC 04 1985

ssus mma ramtcitm

r ~^ « | ' t * t S f J * I 1 . 1 3 a . «NN>HM *

l ) t ; r ! ; iPJJCK_Of_TMf - „PRQEfJSE

T h i s E n v i r o n m e n t a l R e p o r t a d d r e s s e s t h e p r o p o s e d d r i l l i n g

ac „ . v 1 t l e s r e l - t e d cc f o u r e x p l o r a t i o n w e l l s t o be d r i l l e d I n

L u o f e I s l a n d b ' o c k ' } ? } by C h e v r o n U . S . A . , I n c . l e s s e e a n d

o p e r a t o r The c r n - e r o f t h e b l o c k I s l o c a t e d a p p c x I n a t c l y l O O

m i l e s s o . t h o f r c r g a n C i t y , L o u i s i a n a , a t w h i c h 1« l o c a t e d t h e

o n s h o r e s u p p o r t b a s e f o r t h e a c t i v i t y . The n e a r e s t m a i n l a n d

s h c r e := l o c a t e d a p p r o x i m a t e l y 66 m i l e s n o r t h e a s t I n T e r r e b o n n e

P a r i s h . T h e l o c a t i o n o f E u g e n e I s l a n d b l o c k 3 23 1 n r e l a t i o n t o

t h e L o u i s i a n a C o a s t a l Zone 1s shown f n E x h i b i t 1 . The l o c a t i o n s

o f t h e p r o p o s e * e x p l o r a t o r y w e l l s w i t h i n t h e b l o c k a r e shown 1n

C x h l b l t 2.

As s t a t e d f t ; t h e e x p l o r a t i o n p l .tn a n d g e o l o g i c p r o g r a m f o r

E u g o n e I s l a n d b l o c k 3 73 , H e l l s " A " , ' r "» " C " a n d " D " w i l l e a c h be

d r i l l e d t o 1 2 , 0 ' 0 t o t a l v e r t i c a l d e p t h ( T V D ) . T h e c o m b i n e d

v o r t i c a l d e p t h o t t h e w e l l ? i s 4 8 , o n o » . I t 1s p r o j e c t e d t o t a k e

an e s t i m a t e d 20 0 d a y s o f d r 111 1 r g t o c o m p l e t e t h e f o u r * e l 1 s . No

s p u d d a t e has b e e n s e t s i n c e c h e v r o n U.S.A. w i l l n o t b e g i n

d r i l l i n g o o e r a t i o n s u n t i l t h e q o n e r a l N a t i o n a * ' P o l l u t a n t

D i s c h a r g e F l Im * r.a t ' o r S y s t e m ( N P D F S ) p e r m i t f o r t h e G u l f o f

M e x l c . K i s b e e n I s s u e d by t . e F PA. The * e l 1 s w i l l be d r i l l ed

f r o m r*ie J a c k - u p r i g " P e n r o d 6 0 " .

The o n s h o r e s u p p o r t e a s e f o r t h e e x p l o r a t i o n o f F u g e n e

I s l a n d b l o c k 3 ?3 w i l l be M o r g a n C i t y . L o u i s i a n a . Nc new

f a c i l i t i e s a r e e n v i s i o n e d I n r e l a t i o n t o t h i s a c t i v i t y . E x i s t i n g

1

If

f a c i l i t i e s a r o a n t i c i p a t e d t c be s u f f i c i e n t f o r a l l s u p p o r t

a c t i v i t i e s . No new w o r k e r s a r e e x p o r t e d t o bo e m p l o y e d f o r t h i s

a c t i v i t y as an e y l s t l n g d r i l l r 1 q and c rew w i l l be u t i l i z e d . The

M r s ! ' r c 1 0 - e c o n o m I c d a t a base r e p o i t w i l l be s u b m i t t e d when t h e

MMf nc t n e s t a t e s o f A l a b a m a , L o u i s i a n a , a n d M i s s i s s i p p i

I d e n t i f y t he s p e c i f i c p a r a m e t e r s t o be a d d r e s s e d 1n t h e s e s e m i ­

a n n u a l r e p o r t s .

The s u r f a c e t r a v e l r o u t e b e t w e e n t h e p r o p o s e d w e l l s i t e s and

t h e s u p p o r t b a s e w i l l be by t h e A t c h a f a l a y a R i v e r , A t c h a f a l a y a

Eay n a v i g a t i o n c h a n n e l and I n t o t h e G u l f o f M e x i c o . T h e a l r

r o u t e w i l l be a s t r a i g h t 11 ie t o E u g e n e I s l a n d b l o c k 3 23 f r o m

M o r g a n C i t y . Two s u r f a c e v e s s e l s a n d t w o h e l i c o p t e r s w i l l

n o r m a l l y h r r m o l e y e d 1n s u p p o r t of t M s a c t i v i t y . One c rew b o a t

w i l l make 4 rc». . . d t r i p s p e r week t o t h e r i g , w h i l e one c a r g o b o a t

I s e x p e c t e d t o m a k e s e v e n r o u n d t r i p s p e r w e e k . One B e l l # 2 0 6

t w l n e n o l n o h e l i c o p t e r w i l l make one r o u n d t r i p p e r day and o n e

B e l l #212 h e l i c o p t e r w i l l make t w o r o u n d t r i p s p e r week .

No n^w or u n u s u a l t e c h n i q u e s or- t e c h n o l o g y t h a t may e f f e c t

c o a s t a l M a t e r s w i l l be u r e d 1n t h i s p ^ p l o r a t o r y d r i l l i n g p r o g r a m .

Due t o t h e w i l d c a t n a t u r e of t h e d r i l l i n g p r o g r a m , no d e v e l o p m e n t

o r p r o d u c t i o n p l a n h a s b e e n f o r m u l a t e d a t t h i s t i m e . A t t h e

a p p r o p r i a t e t i m e ( a f t e r t h o e x p l o r a t o r y p r o g r a m ) , a

d ev e l o pm e n t / p r o d u c 11 on p l a n q I v l n q t h e p r o p o s e d mean*-, a n d

l o c a t i o n o f g a s a n d / o r o i l t r a n s p o r t a t i o n f a c i l i t i e s w i l l he

p r e s e n t e d .

rES£BIEIJJ>N_J)E_JHF_AfTECIED_F.NyjFONMr. NT_AND_IMEoCI.S

a. Phys ica l and Fnv1ronmenta 1

( 1 ) CommeicJ a. J._f IsbJnfl

D a t a p r e s e n t e d I n t h e R e o l ' - a l Fnv I r o n m e n t a l I m p a c t

S t a t emen t f o r the G u l f of Mexico show Eugene I s l a n d block 3 23 t o

be l o c a t e d near a p r o d u c t i v e f l s h t n o area. The mean y e a r l y c a t c h

r e t u r n e d t o the Morgan f ' t y , i r n was 374.4 m i l l i o n pounds

(combined f i n and s h e l l f i s h ) f o r tho y r a r s 1977 through 1961 . The

m a j o r f i s h e r y In tho area I s menhaden ( B r e y o o r i i i PJlroni is . ) . The

most common s p o r t f l s h c a u g h t 1n t h e area w o u l d I n c l u d e k i n g

macke re l (Sccmfcercmgrus C a l a l i a , ) . Spanish mackere l (Sc.gmbfixomgr.us

B J C i j l a i u s ) » c r e v a l l e J a c k (C a r a n x h i p p o s ) * and w a h o o

(AcAjj ijocybJum solanderJ).

Commerc ia l ly Impor tan t spec ies of s h r i m p , the most common

b e i n g brown s h r i m p (£en,a .eu5 3 Z l e c u s > -ind w h i t e s h r i m p (P^.

S £ i J fPILUS)» are taken In t h e v i c i n i t y of Fugene I s l a n d b lock 323 .

N e a r l y 51 ,000 t o n s of s h r i m p were c o l l e c t e d by c o m m e r c i a l

f 1 sh er m en In I oP4 a l o n g t h e coas t of t h e n o r t h e r n G u l f of M e x i c o *

thus p r o v l d ' n g f i s h e r m e n w i t h an abundant economic resource .

Major oys te r grounds are l o c a t e d n o r t h e a s t of Fugene I s l a n d

b l o c k 3 73 i n th<* I n s h o r e w a t e r s of T e r r e b o n n e P a r i s h . The

n e a r e s t g r r u n d s a r e a p p r o x i m a t e l y P fi m i l o s n o r t h e a s t o f t h o

b l o c k .

I m p a r t s t o the o f f s h o r e f i s h e r i e s w i l l r e s u l t f rom l o s s o f

t r a w l i n g ' i r "a f or f i s h i n g vesse ls <j«ie t o the p h y s i c a l pi esonco of

f • - « • • • t ? r rVt f . I t * A .. . . . . . • »

t h e e q u i p m e n t a n d a d e c r e a s e I n w a t e r q u a l i t y I n t h e I m m e d i a t e

a r e a o f t h e r i g f r o m t h e d i s c h a r g e o f d r i l l i n g f l u i d s a n d

c u t t 1 n g s .

T h e d r i l l i n g r i g w i l l p r e v e n t c o m m e r c i a l f i s h e r m e n f r o m

u s i n g o n e t o t w o h e c t a r e s o f b o t t o m f o r t h e d r i l l i n g p e r i o d .

D i s c h a r g e o f u s e d d r i l l i n g f l u i d s a n d c u t t i n g s w i l l d e c r e a s e

w a t e r q u a l i t y c a u s i n g c o m m e r c i a l l y i m p o r t a n t s p e c i e s t o a v o i d t h e

I m m e d i a t e a r e a . As t h e c u t t i n g s a n d m u d p a r t i c l e s s e t t l e *

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

a l 1 e v 1 a t e d .

T r e a t e d s a n i t a r y w a s t e * p r o d u c e d w a t e r s * r i g wash* r u n o f f *

a n d d e s a l i n i z a t i o n w a s t e a r e t o be d i s c h a r g e d f r o m t h e r i g . These

d i s c h a r g e s s h o u l d n o t s i g n i f i c a n t l y a f f e c t c o m m e r c i a l f i s h i n g a s

t h e v o l u m e o f w a t e r I s so g r e a t r e l a t i v e t o t h e v o l u m e o f

e f f l u e n t t h a t d i s p e r s a l w i l l be r a p i d .

( 2 ) S M l J ^ X J i l _ P - l f f J S U X e J 3 o a i J ^ ^

E u g e n e I s l a n d b l o c k 323 I s l o c a t e d 66 m i l e s f r o m t h o

n e a r e s t s h o r e . F y p l o r a t . o n I n t h i s b l o c k w i l l p r o b a b l y n o t

s i g n i f i c a n t l y a f f e c t r e c r e a t i o n a l b o a t i n g o r s p o r t f l s h l n g due t o

I t s d i s t a n c e o f f s h o r e . T e m p o r a r y fo.ns o f one t o t w o h e c t a r e s f o r

f i s h i n g w i l l be i n c u r r e d d u r i n g t h e d r i l l i n g p e r i o d . T h i s I m p a c t

w i l l t e r m i n a t e when t h e d r i l l i n g o p e r a t i o n I s c o m p l e t e .

T h e d r i l l i n g r i g w i l l p r o r e n t a s l i g h t h i n d r a n c e t o

n a v i g a t i o n f o r f i s h i n g v e s s e l s . I t s p r e s e n c e I n t h e a r e a w i l l

4

> S ' I ' I M I • f S A . . . . . < « - . . . . . . .

§j s e r v e as a «=afe ty ( a c t o r f o r v e s s e l ? neer l l nq emergency h e l p and

as a r e f e r e n c e p o i n t .

No m a j o r r e c r e a t i o n a l beaches a r e f o u n d a l o n g t h e c o a s t o f

9 T e r r e b o n n e P a r i s h . The c l o s e s t *andy beach a rea I s l o c a t e d

a p r r o x l rnatel y 69 "Hies t o t h e no r th of Eugene I s l a n d b lock 373 In

T e r r e b o n n e P a r i s h . An o i l s p i l l ' - o u l d p o s s i b l y reach t h e s e

ff j s h o r e s , t hough t h e p r e d o m i n a n t we<=twardly c u r r e n t and e a s t t o

s o u t h e a s t w i n d s w o u l d l e s s e n t h e l i v e l i h o o d t h a t a s p i l l m i g h t

reach the r.horel Ine.

M) D i s t u r b a n c e t o h u n t i n g and f i s h i n g I n t h e c o a s t a l zono by

boats and h e l i c o p t e r s s e r v i c i n g the o p e r a t i o n should be m i n i m a l

I n an a l r eady mu-h t r a v e l e d area.

(3 ) S h i p p i n g

Eugene I s l a n d b l o c k 3 73 Is 1 o r a t e d a p p r o x i m a t e l y 19 m i l e s

n o r t h of the n e a r e s t s a f e t y f a i r w a y I n t h e G u l f of M e x i c o . The

' l i : 11 I ! • ir a -•!•••« . I t h 1 I g h t s t o w .nn commercl al t r a f f Ic o f I t s

p r e s e n c e . The w r t l s l o c a t e d I n Eugene I s l a n d b l o c k 3 73 a r e ,

t h e r e f o r e , expected t o have no s i g n i f i c a n t Impact on commercia l

t r a f f i c 1n the G u l f of Mexico .

( 4 ) CijJiJJlitJ_BfiSQULSSS

# Eugene I s l a n d b lock 373 l i e s o u t s i d e the aroa des ignated as

l i k e l y t o y i e l d v a l u a b l e c u l t u r a l r e s o u r c e s . A c u l t u r a l

resources survey was not necessary f o r t h i s b l o c k . There a r e no

• known s h i p w r e c k * w i t h i n Eugene I s l a n d b l o c k 3 23. The c l o s e s t

known sh ipwreck I s l o c a t e d a p p r o x i m a l o l y 73 m i l e s no r th n o r t h w e s t

f . > » : t M i l !

of the cen te r of t he b l o c k . No s i g n i f i c a n t Impact I s expected on

any c u l t u r a l r e s o u r c e s f r o m d r i l l i n g a c t i v i t y I n t h i s b lock .

A v a i l a b l e I n f o r m a t i o n shows t h a t t h i s b l o c k o c c u r s I n an

a rea w i t h a s i l t y c l a y b o t t o m . There are no known s e a f l o o r or

subsur face g e o l o g i c and man-made f e a t u r e s or c o n d i t i o n s t h a t may

a d v e r s e l y a f f e c t the proposed o p e r a t i o n s .

(5) t £ o j o f l j £ f l J i y _ S e i i 5 J i J y f i _ f i . f l t u r e s

The m a r s h - e s t u a r l n e e c o s y s t e m I n s h o r e f r o m Eugene I s l a n d

b l o c k 3 23 I s v e r y p r o d u c t i v e . The e x t e n s i v e m a r s h - e s t u a r l n e

systems a l o n g c o a s t a l Lou l s ' ana a re u t i l i z e d I n t h e 1 1*e c y c l e of

t h e I m p o r t a n t c o m m e r c i a l f i s h e s and s h e l l f i s h e s of t h e r e g i o n .

T y p i c a l e s t u a r i n e dependent, c o m m e r c i a l l y Impor t an t species such

as s h r i m p and menhaden spawn o f f s h o r e and m i g r a t e t o t he sa l t -

marshes as p o s t l a r v a e where t h e y spend t h e j u v e n i l e s t a g e s o f

t h e l r 1 1f e h i s t o r y .

The re a r e t w o a r e a s o f b i o l o g i c a l s i g n i f i c a n c e w i t h i n 26

m i l e s o f Eugene I s l a n d b l o c k 3 23. These a reas are t h e F i s h n e t

Bank l o c a t e d 22 m i l e s t o wes t s o u t h w e s t o f t h e b l o c k and t h e

A l a m i n o s Bank l o c a t e d 26 m i l e s t c the s o u t h w e s t of t ho b l o c k .

Both of these f e a t u r e s are r a i s e d areas of the G u l f bottom which

may a t t r a c t a v a r i e t y of p l a n t s a n d / o r a n i m a l s . Due t o t h o

d i s t a n c e between Eugene I s l a n d b lock 373 and these two banks, 1t

1s d o u b t f u l t h a t the d r i l l i n g a c t i v i t i e s r i l l have any Impact on

these b i o l o g i c a l l y s e n s i t i v e a roa* .

„5»> *»{'•* V t I TVS I . V !

A l t h o u g h t h e r e a r e s e v e r a l w i l d l i f e r e f u g e s and management

a r e a s f o u n d a l o n e t h e L o u i s i a n a c o a s t * n o n e a r e l o c a t e d 1 n t h e

t h e I m m e d i a t e a r e a o f E u g e n e I s l a n d b l o c k 3 2 3 . T h e c l o s e s t

r e f u g e 1s t h e S h e l l K e y e s N a t i o n a l W i l d l i f e R e f u g e l o c a t e d

a p p r o x i m a t e l y m i l e s n o r t h n o r t h w e s t o f E u g e n e I s l a n d h l o c k

3 2 ? . I t s v a l u e 1= m a i n l y t o p r o t e c t n e s t i n g s e a b i r d s * w h i c h I n

197 6 I n d u c e d 1 , 0 0 0 b l a c k s k i m m e r s , 90 l a u g h i n g g u l l s , 7 * 3 2 0

r o y a l t e r n s , and 7 , 6 7 5 s a n d w i c h t e r n s ( P o r t n o y , 1 9 7 7 ) .

M a r s h I s l a n d w a s d o n a t e d t o t h e s t a t e by t h e R u s s e l l Sage

F o u n d a t i o n I n 1 9 7 0 w i t h t h e s t i p u l a t i o n t h a t I t w o u l d r e m a i n a

w « T J 1 1 * e r r f n i f l . T h e s o u t h e r n t i p o f M a r s h I s l a n d 1s l o c a t e d

a p p r o x 1na t o 1 y 89 m i l e s n o r t h n o r t h w e s t o f E u g e n e I s l a n d b l o c k

3 2 3 . T h e r e s h o u l d be no m e a s u r a b l e e f f e c t f r o m t h e d r i l l i n g

a c t i v i t i e s on t h e e o w i l d l i f e r e f u g e s .

M o s t o f t h e m a j o r o y s t e r a r e a s i n L o u i s i a n a a r e l o c a t e d 1n

s o u t h e r n T e r r e b o n n e P a r i s h and e a s t w a r d . The c l o s e s t p r o d u c t i v e

o y s t e r b e d s a r e l o c a t e d I n T e r r e b o n n e P a r i s h a p p r o x i m a t e l y 66

m i l e s n o r t h e a s t o f t h e b l o c k .

H a t e r q u a l i t y I s a f f e c t e d by s p i l I ed o i l . I f an o i l s p i l l

o c c u r s * t h e r e w o u l d be a p o t e n t i a l a d v e r s e e f f e c t o n m a r i n e

m a m m a l s o r b i r d s . B i r d s h a v e b e e n s e r i o u s l y a f f e c t e d by o i l

s p i l l s I n o t h e r p a r t s o f t h e w o r l d * b u t t h e r e h a s b e e n no

r e p o r t e d a v i a n m o r t a l i t y f r o m o i l s p i l l s i n t h e G u l f e f M e x i c o .

The • am e I s t r u e o f m a r i n e m a m m a l s * a l t h o u g h m o s t s p e c i e s

r e c o r d e d f o r t h e G u l l o f M e x i c o a r e a c t u a l l y v e r y r a r e . 011

s p i l l s I n t h e o p e n G u l f do n o t v i s i b l y a f f e c t t h e m a r i n e

i

1 n\ o r t e h r a 1 e f a u n a . A s m a l l c r ga n 1 ?m s u r h a s a co pe po d , w o u l d

s u r e l y be k i l l e d I f I t e n c o u n t e r e d s p i l l e d o i l , b u t t h e a m o u n t o f

w a ' e r I n v o l v e d so g r e a t t h a t no I n n w n q u a n t i t a t i v e s a m p l i n g

p r o g r a m cr. u ' d d e t e c t a p o p u l a t i o n c h a n g e .

I f s p i l l e d e l l w e r e t o r e a c h r-bm e, n o n e I m p a c t w o u l d o c c u r

on t h e s h a l l o w w * t e r b i o t a . T h e r e h a s m a l l p o s s i b i l i t y t h a t

any l i q u i d p e t r o l e u m h y d r o c a r b o n s w o u l d r e a c h s h o r e f o r t w o

r -vju«-.. i fcugone I s l a n d b l o c k 3 73 i s a s i g n i f i c a n t

d i s t a n c e o f f s h o r e . S e c o n d l y , t h e p r e d o m i n a n t c u r r e n t s I n t h e

a r e a mcve we s tw ar d i y a n d t h e w i n d s a r e p r e d o m i n a t e l y o u t o f t h e

e a s t t o s o u t h e a s t . The I m p a r t s o f d r i l l i n g * t h e r e f o r e , on

e c o l o g i c a l l y s e n s i t i v e a r e a s 1 r, t h o c o a s t a l z o n e a r e e x p e c t e d t o

• ( l e a n t .

( 6 ) E 2 c J s i ! f l f l _ p . t p e . l i n e s . a n d _ S u b n a r J n e C a b l e s

T h e r e a r e t w o knewn p i p e l i n e s l o c a t e d 1n Eugene I s l a n d b l o c k

3 23 . One p i p e l i n e r u n s s o u t h w e s t t o n o r t h e a s t t h r o u g h t h e

n o r t h w e s t c o r n e r of t h e b l o c k . The o t h e r p i p e l i n e r u n s s o u t h e a s t

t o n o r t h w e s t t h r o u g h t h e n o r t h e r n h a l f o f t h e b l o c k . T h e

d r i l l i n g a c t i v i t i e s w i l l n o t a f f e c t o r d a m a g e t h e p i p e l i n e s

l o c a t e d I n t h i s b l o c k . T h e r e a r e no k n o w n s u b m a r i n e c a b l e s

l o c a t e d I n Eugene I s l a n d b l o c k 3 7 3 .

( 7 ) Q i h f i r _ . M j n f i x a . l _ U s s s

S u l p h u r a n d s a l t , t w - " m po r t a n t m i n e r a l s e x t r a c t e d f r o m

c o a s t a l L o u i s i a n a , a r c . i o t k n o w n t o o c c u r i n c o m m e r c i a l l y

f e a s l *»s a n d / o r . - . i rount r w i t h i n t h i s b l o c k .

8

A t t h e p r e s e n t t i m e a g e n e r a l N a t i o n a l P o l l u t a n t D i s c h a r g e

E l i m i n a t i o n S y s t e m (NPDES) p e r m i t h a s n o t b e e n i s s j e d f o r t h e

G u l f o f M e x i c o by t h e U.S. Fnv 1 rons ien t a l P r o t e c t i o n A g e n c y . T h i s

p e r m i t w i l l r e g u l a t e d l s c h a r q e o f w a s t e w a t e r , d r i l l i n g

f l u i d s , muds a n d d r i l l c u t t i n g s f i o m o f f s h o r e d r i l l i n g r i g s .

C h e v r o n U.S.A. I n c . w i l l n o t b " o 1 r t h e i r e x p l o r a t o r y d r i l l i n g

a c t i v i t i e s u n t i l t h e g e n e r a l NPDES p e r m i t f o r t h e G u l f o f M e x i c o

ccmob I n t o e f f e c t .

T h e m a j o r a n t i c i p a t e d d i s c h a r g e f . om t h e p r o p o s e d f o u r

e x p l o r a t o r y w e l l s w i l l be u s e d d r i l l i n g f l u i d s , c u t t i n g s , a n d

f o r m a t i o n w a t e r * - . U s i n g t h e e s t i m a t e s p r e s e n t e d i n t h e D r a f t

E n v i r o n m e n t a l I m p a c t S t a t e m e n t f o r t h e ] o 80 O i l a n d Gas L e a s e

S a l e s A6L and 6 7 , V o l u m e 1 , paae 6 0 f o r a 1 5 , 0 0 0 ' w e l l , t h e

e s t i m a t e d 4 5 , 0 0 0 * m e a s u r e d d e p t h o l t h e h o l e f o r t h o f o u r w e l l s

w i l l p r o d u c e a p p r o > 1 m a t e l y 357 t o n s o f c o m m e r c i a l mud c o m p o n e n t s

a n d 3 0 4 0 t o n s o f d r i l l c u t t i n g ? . No r e l i a b l e e s t i m a t e s o f t h e

amoun t of f o r m a t i o n w a t e r s p r o d u c e d f r o m a e x p l o r a t o r y w e l l c a n

be made a t t h i s t i m e . As s t a t e d I n t h e p r e v i o u s l y c i t e d D E I S ,

s o m e c o m p o n e n t s o f d r i l l i n g f l u l o * a r e k n o w n t o be t o x i c t o

c e r t a i n o r g a n i s m s . The use of f r e s h w a t e r based d r i l l i n g f l u i d s

w i l l I n t r o d u c e 1 r t o t h e m a r i n e e n v i r o n m e n t r e l a t i v e l y n o n - t o x i c

d r i l l c u t t i n g s a n d f o r m a t i o n w a t e r s . The d i s p o s a l o f t h e s e

m a t e r i a l s f i t t h - v e i l l o c a t i o n s c a n be e x p e c t e d t o c a u s e l o w

l e v e l l o c a l I r e d a d v e r s e I m p a c t s nn b o t h b o t t o m c o m m u n i t i e s a n d

«-*•!* I : i rvt I . I

wa te r q u a l i t y I m m e d i a t e l y a d j a c « ' the w e l l s . A more comple te

d i s c u s s i o n o f t h e I m p a c t s o f r i l l i n g f l u i d s * c u t t i n g s , and

f o r m a t i o n w a t e r s I s presented 1 n t h e DEIS f o r lease sa le A62 and

62* V o l u m e 1* on pages 69* 86* 67* 1 4 1 * and 1 4 2 . These

d ' i c u s s l o n s c o v e r I m p a c t s on t h e OCS a reas p r i m a r i l y . The

p r i m a r y Impacts of the d i sposa l of d r i l l i n g f l u Ms* c u t t i n g s , and

f o r m a t i o n w a t e r s w i l l a l l occur and bo l l m l t e d t o t h e o f f s h o r -

area and not I n f r i n g e on the L o u i s i a n a Coas ta l Zone.

The o t h e r c o n s t i t u e n t s o f t h " p r o p o s e d d i s c h a r g e f r o m t i

f o u r e x p l o r a t o r y w e l l s Inc lude de >a1 111za t i o n p l a n t wastes (sea

s a l t s ) * t r e a t e d s a n i t a r y • i : t « ( t o s e c o n d a r y t r e a t r r e n

s t a n d a r d s ) , r u n o f f ( r a i n w a t e r ) and r i g w a s h w a t e r ( o i l

separa ted) w i l l bo m o n i t o r e d 1n accordance w i t h t he c o n d i t i o n s o f

the proposed EPA NPDES p o r m l t .

(9 ) A i r Q u a l l - v

A1 r e m i s s i o n s w i l l r e s u l t f r o m suppor t v e h i c l e s (boats and

h e l i c o p t e r s ) as w e l l as f r o m the d r i l l i n g r1 g. A n t i c i p a t e d

emis s ions a re a l l expected t o be below MMS g u i d e l i n e l i m i t s and

a re g i v e n 1 n t h e A p p e n d i x . Any w a s t e m a t e r i a l s u i t a b l e f o r

c o n s u m p t i o n by f i s h or o t h e r m a r i n e 1 I f e nay be d i s c a r d e d I n t o

t h e w a t e r . A l l o t n e r t y p e s o f w a s t e m a t o r l a a re t o be c o l l e c t e d

and t r a n s p o r t e d t o shore f o r proper d i s p o s a l .

The most s e r i o u s ami,1ent a l r q u a l i t y problems 1n the r e g i o n

e r e a round urhar , a r e a s , p a r t i c u l a r l y t hose w h i c h a re h i g h l y

I n d u s t r i a l i z e d . A l t h o u g h e m i s s i o n s d a t a a r e i m p o r t a n t *

10

r «-*•!• f : » rvi 1 . t J *

m) p a r t i c u l a r l y w h e n c o n s i d e r i n g c o n t r o l a l t e r n a t i v e s * i t m u s t be

r e m e m b e r e d t h a t a m b i e n t a i r q u a l i t y o f f s h o r e I s e x c e l l e n t , a n d

t h e d l s . h a . g e c f o s s e o u s e m i s s i o n s does n o t h a v e t h s c u m u l a t i v e

^ I m p a c t t h ? t a s i m i l a r v o l u m e of e m i s s i o n s v o u l d h a v o 1n an a r e a

v i t h poor a m b i e n t a l t q u a l i t y . These a i r e m i s s i o n s a r e e x p e c t e d

t o h a v e n e g l i g i b l e I m p a c t on t h e C ' . a s t a * . ..ne o f L o u i s i a n a by

— v i r t u e of t h e i r s m a l l amount and d i s t a n c e o f f s h o r e .

no) fudjjflfl. Tad. vr_I^eaie^ed_.Sp«c.ie5

A l l o f t h • r e a t u r t l e s w h i c h o c c u r I n t h e G u l f o f M e x i c o a r e

e n d a n g e r e d o r t h r e a t e n e d , hone of t hem n e s t I n L o u i s i a n a w e s t o f

t h e M i s s i s s i p p i d e l t a . The r a r e s t o f t h e s e t u r t l e s , t h e A t l a n t i c

R i d l e y i L S Q l s l Q c h 9 \ y s k f i a i p j ) a p p a r e n t l y uses t h e n o r t h e r n G u l f as

a f e e d i n g g r o u n d . Tho key * o t h e s u r v i v a l o f t h i s s p o c l e s ,

h o w e v e r . I s 1n t h e p r o t e c t i o n of I t s n e s t i n g beach I n T a m a u l i p a s .

M e x i c o . O t h e r t u r t l e s f o u n d 1 n t h e n o r t h e r n G u l f o f M e x i c o a r e

t h e g r e e n t u r t l e (CJbeJ.onJ.fl m.yjjBS)» l o g g e r h e a d (£flX_Sit.fl c a r e i i a ) ,

and t h e l e a t h e r b a c k (Qexf l j f lCl l f iJ^5 c e x l f l c e a ) .

C o r t a l n w h a l e s a n d d o l p h i n s may a l s o bo f o u n d I n t h e

n o r t h e r n Gu l f o f M e x i c o ( L o w e r y , 1 ° 7 4 ) . F n d a n g e r o d s p e c i e s o f

w h a l e s o c c u r r i n g I n t h e G u l f I n c l u d e t h e g i a n t s p e r m w h a l e

< E i ) l f J i i f i X C J l o d f l L ) a n d t h e f l n b a c k e d w h a l e ( S A l A S L D D i a i A

J l i l J f S J j j j a ) . T h e s e a r e r a r e 1n t h e G u l f a n d 1 t 1s d o u b t f u l t h a t

d r l l l l n o a c t i v i t i e s I n Eugene I s l a n d b l o c k 323 w i l l a f f e c t t h e s e

s p e c i f ' . . O t h e r m a r i n e mammals w h i c h a r e n o t e n d a n g e r e d b u t a r e

m o r e c o m m o n l y f o u n d i n t h e a r e a a r o t h e A t l a n t i c b o t t l e n o s e d

•0 11

c .3* H T I ' t l t n / i i . r t * . AMM -v.

d o l p h i n ( I i i r s J o y s i x u n c a i u s ) * s p o t t e d d o l p h i n ( i l f i r f l J J a

J l l J»Ql£Sl 2D.) t f a l s » k i l l e r wha le (P.a eu di ixc a. £XJSSJiljBIlS> # and t h e

common d o l p h i n (QfiJ.i?iiJjJU5 J f i l p i l J s ' •

Both the a f o r e m e n t i o n e d , t u r t l e s and mammals* would s u f f e r

temporary l o s s of a sma l l area f o r f e e d i n g grounds. C o l l i s i o n s

w i t h m o t o r i z e d v e s s e l s a r e p o s s i b l e but h i g h l y u n l i k e l y . More

I n f o r m a t i o n on t h r e a t e n e d or endangered s p e d e s I s p resen ted I n

the O r a f t Regional Env i ronmen ta l Impact Statement f o r t he G u l f of

Mexico* Appendix P» pp: 625-666.

b . Sod o-Econor 1cs

The o f f s h o r e o i l e x p l o r a t i o n I n d u s t r y I n c l u d i n g o i l

companies* d r i l l i n g c o n t r a c t o r s * o i l f i e l d s u p p l i e r s and the r e s t

of t*ie o i l I n d u s t r y I n f r a s t r u c t u r e p r o v i d e a major i npu t t o south

c e n t r a l L o u i s i a n a ' s e i « r,omy. The s u p p o r t base f o r t he p roposed

e x p l o r a t o r y d r i l l i n g a c t i v i t y * M o r g a n C i t y , 1s a l m o s t

e n t i r e l y dependent on the o i l and commercia l f i s h i n g I n d u s t r i e s

f o r d i r e c t and I r d l r e c t employment In suppor t I n d u s t r i e s (Larson

S t A l . ' 19*0 ) . As s t a t e d i n t h e I n t r o d u c t i o n , Chevron U.S.A.

I n c . w i l l p r o v i d e a s o c i o - e c o n o m i c da ta base r e p o r t f o r a l l OCS

j p e r a t l o n s I n c l u d i n g data f o r Fugene I s l a n d block 3 23. Also as

p r e v i o u s l y s t a t e d , no new e m p l o y e e s w i l l be r e q u i r e d f o r t h i s

p r o j e c t * c i t h e r as d r i l l i n g crews or In suppor t f u n c t i o n s .

0

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Adverse I m p a c t s w i l l r e s u l t f r o m d i s c h a r g e of c u t t i n g s and

d r i l l i n g f l u i d s , e m i s s i o n s f r o m b o a t s , h e l i c o p t e r s , a n d e n g i n e s

o n t h e d r i l l i n g r i g , l o s s o f t r a w l i n g a r e a f o r f i s h i n g v e s s e I s ,

and I n c r e a s e o f p o t e n t i a l f o r o 11 s p i l l s . A l s o , p r e s e n c e of t h e

dr 111 1 no r i g w l 1 ' p r e s s n t a s l i g h t < v1ga 11 on h a z a r d t o s s e l s

1n t h e a r e a .

Wat t . , q u a l i t y w i l l be a f f e c t e d by t h e d i s c h a r g e o f f l u i d s

and c u t t i n g s d u r i n g t h e d r i l l i n g p e r i o d . T h i s w i l l r e s u l t 1n t h e

l o s s o f one t o t w o h e c t a r e s o f t r a w l i n g a r e a f o r c o m m e r c i a l and

s p o r t f 1 sh e r mo n. T h e r e w i l l a l s o he a t e m p o r a r y I m p a c t on t h e

b e n t h o s I n t h e I m m e d i a t e - . r e a o f t h e r i g a s c u t t i n g s s e t t l e t o

t h e b o t t o m . T h e h e a v y m e t a l c I n t h e d r i l l i n g f l u i d s c o u l d

c o n c e i v a b l y h a v e a n a d v e r s e I m p a c t on t h e b i o t a , b u t t h e / o l u m e

o f w a t e r 1s so g r e a t r e l a t i v e t o t h e v o l u m e o f d i s c h a r g e d

e f f l u e n t t h a t 1 t w o u l d be d i f f i c u l t l o m e a s u r e .

W a t e r q u a l l t y 1s a f f e c t e d by s p i l l e d o i l . I f a n o i l s p i l l

o c c u r s , t h o r e w o u l d be a p o t e n t i a l a d v e r s e e - f f e c t on m a r i n e

m a m m a l s o r b i r d s . I f s p i l l e d o i l w e r e t o r e a c h s h o r e , j o m e

I m p a c t w o u l d o c c u r on t h e s h a l l o w w a t e r b i o t a . C h r o n i c o i l

p o l l u t i o n o f t h e s e a I s a r e m o t e p o s s l . 1 l 1 t y » b u t t h e t o t a l

c o n t r i b u t i o n o f t h e o f f s h o r e I n d u s t r y 1s n e g l i g i b l e c o m p a r e d w i t h

l a n d r u n o f f f r o r r r i v e r s a n d o i l t r a n s p o r t . The d i s t a n c e f r o m

s h o r e (66 m i l e s ) and t h e p r e d o m i n a n t c u r r e n t and w i n d s I n Eugene

13

, f « s r r i ; » rvt 1 . 1 : A »

I s l a n d b l c - k 3 /? make t h e pr a b i l i t y o f any s p i l l e d p e t r o l e u m

h y d r o c r bens r e a c h i n g s h o r e n e g l i g i b l e .

The d r i l l i n g r i g may p r e s e n t a ' • l i g h t n a v i g a t i o n h a z a r d t o

r i s k i n g and s e r v i c e v e s s e l s 1n t h e a r e a , b u t Eugene I s l a n d b l o c k

3 ?zi I s l o c a t e d a r p r o x l m a t e l y 1 ° m i l e s f r o m t h e n e a r e s t s h i p p i n g

1 r no and w i l l be m a r k e d w i t h n a v i g a t i o n l i g h t s .

A i r e m i s s i o n s f '•om m o v a b l e and I m m o v a b l e s o u r c e s w i l l r e s u l t

f r o m t h e p r o p o s e d e x p l o r a t i o n . H o w e v e r , b e c a u s e o f t h e d i s t a n c e

b e t w e e n t h e d r i l l i n g r i g f r o m s h c r e and t h e e x c e l l e n t a m b i e n t a i r

q u a l i t y * t h e s e e m i s s i o n s c a n n o t be c o n s i d e r e d s i g n i f i c a n t .

C h e v r o n U.S .A . I n c . w i l l n o t ' o m m ^ n c o t h e i r e x p l o r a t o r y

d r i l l i n g o p e r a t i o n s u n t i l t h e EPA I s s u e s t h e g e n e r a l NPDES p e r m i t

f o r t h e G u l f o f M e x i c o .

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EEEERfflCES ft

B e h l c r , J . l . a n d F.W. K i n g . 1 9 7 9 . The A u d u b o n S o c i e t y f i e l d g u i d e t o N o r t h A m e r i c a n r e p t i l e * and a m p h i b i a n s . A l f r o d A. Knopf P u b l i s h i n g , New Y o r k . 719 p.

t B u r e a u o f L a n d M a n a g e m e n t * D e p a r t m e n t o f t h e I n t e r i o r . 1 9 7 9 . D r a f t E n v i r o n m e n t a l I m p a c t S t a t e m e n t f o r t h e p r o p o s e d 1980 O u t e r C o n t i n e n t a l S h e l f O i l and Gas Lease S a l e s A62 and 6 2 .

C o n a n l i P. 1 9 5 8 . A f i e l d g u i d e t o r e p t i l e s a n d a m p h i b i a n s o f E a s t e r n a n d C e n t r a l N o r t h A m e r i c a . H o u g h t o n M i f f l i n

• Company, B o s t o n . 429 p.

L a r s o n , P . " . , D. D a v i s , R. D e t r o , P. D u m o n d , E. L l e b o w , R. M n t s r h a l l , P. S o r e n s e n , a n d W. G u l d r o z . 1 9 8 0 . M i s s i s s i p p i D e l t a ' c P l a i n R e g i o n e c o l o g i c a l c h a r a c t e r i z a t i o n ! a s o c i o e c o n o m i c s t u d y . V o l . 2 . Map n a r r a t i v e s . U.S. F 1 s h

• a n d W i l d l i f e S e r v i c e , O f f i c e o f B i o l o g i c a l S e r v i c e s . FW S/ OB S-7 9 / 0 6 .

L o v e r y , G.H. 1 97 4 . The m a m m a l s o f L o u i s i a n a a n d I t s a d j a c e n t v a t e r s . LSU P r e s s , B a t o n R o u g e , L o u i s i a n a . 565 p.

• M i n e r a l s Managemen t S e r v i c e , D e p a r t m e n t o f t h e I n t e r i o r . 1 9 8 2 . D r a f t R e g i o n a l E r v 1 r o nme n t a l I m p a c t S t a t e m e n t : G u l f o f M e x i c o . M i n e r a l s M a n a g e m e r t S e r v i c e , G u l f o f M e x i c o OCS R e g i o n , M e t a i r i e , L o u i s i a n a . 735 p.

P o r t n o y . J .W. 1 97 7 . N e s t i n g c o l o n i e s o f s e a b i r d s a n d w a d i n g » b i r d s - C o a s t a l L o u i s i a n a * M i s s i s s i p p i , a n d A l a b a m a . U.S.

F1sh a n d W i l d l i f e S e r v i c e , B i o l o g i c a l S e r v i c e P r o g r a m . FWS/OBS-77/07 . 1 26 p.

^<*l* I t i IVI I « ITI * » »»»•« •• •• * • • *• > «*!t •

The proposed a c t i v i t y w i l l be c a r r i e d out and comp le ted w i t h t h e

guaran tee of the f o l l o w i n g I t ems .

1 . The bes t a v a i l a b l e and s a f e s t t e c h n o l o g i e s w 11 1 be

u t i l i z e d t h r o u g h o u t the p r o j e c t . Th i s I n c l u d e s m e e t i n g

a l l a p p l i c a b l e r e q u i r e m e n t s f o r e q u i p m e n t t y p e s *

general p r o j e c t l a y o u t * sa fe t y sys tems, and equ ipment

and m o n i t o r i n g systems.

2 . A l l o p e r a t i o n s w i l l be c o v e r e d by MMS a p p r o v e d o i l

s p i l l con t i ngency p lan .

3 . A l l a p p l i c a b l e F e d e r a l , S t a t e and l o c a l r e q u i r e m e n t s

r e g a r d i n g a i r e m i s s i o n , w a t e r q u a l i t y a n d w a s t e

d i s c h a r g e f o r t h e p roposed a c t i v i t i e s , as w e l l au any

o ther r e g u l a t o r y c o n d i t i o n s , w i l l be c o m p l i e d w i t h .

c 3 N T I M t¥§ f . 1 3 * • . . . . . . .

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FROM LOUISIANA COASTAL PROGRAM - FINAL PtVIWONMOITAL IMfftCT STATf MCKT

EUGENE ISLAND BLOCK 323 IN RELATION TO THE

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EUGENE ISLAND BLOCK 323 PROPOSED WELL LOCATIONS

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•I I

APPENDI X

s s n : i ivi i . I I

A I R QUALITY STUDY EMISSIONS DATA AND CALCULATIONS

DISTANCE TO NEAREST SHORE IS 66 MILES

S o u r c e D e s c r i p t i o n s

1 - Crew b o a t - f o u r r o u n d t r i p s pe r week

1 - Cargo b o a t - s e v e n r o u n d t r i p s p e r week

2 - H e l i c o p t e r s * 2 e n g i n e s each

1 - B e l l #206 s e v e n r o u n d t r i p s p e r week 1 - B e l l #212 t w o r o u n d t r i p s p e r week

T h o r e a r e f o u r w e l l s t o be d r i l l e d u n d e r t h i s e x p l o r a t i o n p l a n r e q u i r i n g a t o t a l o f 2 0 0 d a y s d r i l l i n g t i m e . t o t a l d e p t h I s 4 " , 0 0 0 f e e t .

cMISSTONS FROM VESSELS 1PLE AT SHORE BASE OR ALONGSIDE DRILLING RIG

CREW BOAT CARGO BOAT lbs/.day tQnsL4n*l lbs /Jay tons/dp.*

CO 17 .59 1 .01 17 .59 1 .76

S02 1 .62 0 .09 1 .67 0 .16

N O x 37 .39 2 .15 37 .39 3 .74

VOC 23 .47 1 .35 23 .47 2 .35

TSP 2.03 0 .11 7.03 0.20

V e s s e 1 s a t v e s s e l per

each day.

s i t e 50X o f t h e t i m e . S i x t y g a l l o n s o f f u e l p e r

2 and TSP w e r e c a l c u l a t e d f r o m V a l u e s f o r a l l p o l l u t a n t s e x c e p t SO t a b l e s 3 . 2 . 3 - 3 o f P a r t A o f U.'S. EPA 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 A1 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 m i s s i o n s w e r e d e t e r m i n e d on a w ot s t c a s e b a s i s .

SC"2 v a l u e s w e r e t a k e n f r o m T a b l e 3 . 2 . 3 - 4 of t h e same p u b l i c a t i o n . T h e s e EPA v a l u e s w e r e c a l c u l a t e d r a t h e r t h a n m e a s u r e d and a s s u m e d t h a t a l l s u l f u r i n f u e l w a s c o n v e r t e d t o S O , T h 1 s a s s u m p t i o n w a s a p p l i e d t o t h e f u e l u s e d I n d l e s e l v e s s e l e n g i n e s due t o a l a c k o f o t h e r d a t a . TSP v a l u e s w e r e a s s u m e d t o be 1.25 o f t h e SO2 v a l u e s b a s e d on a r a t i o a v e r a g e d f r o m s e v e r a l t a b l e s f o r d l e s e l e n g i n e s 1n t h e a b o v e m e n t i o n e d EPA p u b l i c a t i o n * A P - 4 2 .

* T o n s per d r i l l p e r i o d

HELICOFT ER EMISSIONS FOR TAKE-OFF AND LANDING C>CLE AT

DRILLING RIG AND SHORE BASE

lhsLAAxLhallzoptar

co S.7 0.7 3

S02 0.13 0.03

0.57 0.08

VOC 0.52 0.07

TSP 0.25 0.04

C a l c u l a t i o n s made us ing Tab le 3.2.1-3 o f U.S. EPA P u b l i c a t i o n AP-42* " C o m p i l a t i o n of A1 r P o l l u t a n t Em iss ion F a c t o r s . "

A s s u m p t i o n - t w o e n g i n e h e l i c o p t e r * one t a k e - o f f and l a n d i n g c y c l e a t each I c a t i o n per day.

One b e l l c o p t e r makes one round t r i p por day One h e l i c o p t e r makes two round t r i p s per week

* Tons per d r i l l p e r i o d

H T i l l rvf r. • :

D R I L L I N G RIG DIESFL ENGINES EMISSIONS

torn LdQ^l

CO 6 .00

so2 7 .76

NOx 40.95

VOC 1.37

TSP 3 .4*

C a l c u l a t i o n s w e r e made u s i n g e m i s s i o n r a t e s l i s t e d I n T a b l e 4 - 4 o f U.S. EPA P u b l i c a t i o n 4 5 0 / 3 - 7 7 - 0 2 6 , J u n e , 1 9 7 7 , " A t m o s p h e r i c E m i s s i o n s f r o m O f f s h o r e 011 and Gas D e v e l o p m e n t and P r o d u c t i o n . "

T h e f o l l o w i n g m o d i f i e d f o r m u l a f r o m t h e a b o v e m e n t i o n e d p u b l i c a t i o n w a s u s e d t o c a l c u l a t e p o u n d s e m i t t e d p e r v e i l f r o m g r a m s pe r h o r s e p o w e r l i s t e d 1 n t a b l e .

__jB/-bjLh_ x to . tJ i_df iDt l i_L i i - . l x i_Ql_*eJls x pQ.hpli 453 . 6 g / l b v e i l y e a r f t .

TSP v a l u e s w e r e assumed ^o be 1 .25 o f t b e SO2 v a l u e s .

* l o n s per d r i l l p e r i o d

SHORE BASE EMISSIONS (TONS/DRILL PERIOD)

SOURCE PftLt"Tr>HT CO so2~ NOx VOC TSP

Crew Boat 1 .01 0 .09 2.15 1 .35 0 . 1 1 Cargo Boat 1.76 0.16 3 .74 2.3 5 0 .20 Hel I c o p t e r 0.73 0 .03 0 .06 0.07 0 .04

T o t a l Emiss ions : 3.50 0 .28 5.97 3.77 0.3 5

RIG EMISSIONS (TONS/DRILL PERIOD)

POLLUTANT CO SO? NOx VOC rsp

Cre« Boat 1.01 0 .09 2.15 1 .35 0 .11 Cargo Boat 1 .76 0.16 3 .74 2 . i S 0 .20 Hel I cop te r 0.73 0.03 0.08 0.07 0.04 R i g * s Die sol Englne 6.00 2 .76 40.95 1 .37 3.45

T o t a l Emiss ions- 9.50 3 .04 46.92 5.14 3 .80

Exemption L e v e l s : 55.528 2 ,198 2 ,198 2 ,198 2 ,198

Exempt ion l e v e l s f o r e m i s s i o n s :

CO E - 3400 D 2 / 3

E - 3400 ( 6 6 ) 2 / 3 • 55,528 t o n s / y e a r

O t h e r s E « 33 .3 D

E - 33.3 (66) « 2,198 t o n s / y e a r

These exempt ion l e v e l s were c a l c u l a t e d f r o m f o r m u l a l i s t e d I n 30 CFR 250.57-Hd).