•

I n Reply Refer To: MS 5231 January 3. 199?

Walter O i l & Gaa Corpora t ion A t t e n t i o n : Ms. Judy Archer L021 Hain S t r ee t , Su i t e 2200 Houston, Texas 77002-6605

Gentlemen:

Reference i s made t o the f o l l o w i n g plan rece ived December 20. 1991:

ype Plan - Supplemental Developraent Operations Coord ina t ion Document Lease - OCS-G 6180 Block - A-22 Area - His.h I s l a n d A c t i v i t i e s Proposed - Caisson and Wei l No. 5

I n accordance w i t h 30 CFR 250.34, t h i s p l an i s hereby deemed submit ted and is now being considered f o r approval .

Your cont ro l nuaber i s S-2729 and should be referenced i n your communication and correspondence concerning t h i s r i a n .

S i n c e r e l y ,

S-njf > ft Don "" r • ;f

D. J . Bourgeois Regional Supervisor F i e l d Operations

bcc: .Lease OCS-G 6180 POD F i l e (MS 5032) MS 5034 w / p u b l i c i n f o , copy o f the p l an

V, and accomp. i n f o .

W A L T E R O I L A C A S C O R P O R A T I O N

Mr. Danie l J . Bourgeois Regional Supervisor

December 17, 1991

O f f i c e of F ie ld Operat ions U . S. Departaent of the I n t e r i o r M i n e r a l s Management Service 1201 Elmwood Park ou levard New Orleans, Louisiana 70123-2394

A t t e n t i o n : Hr. Mike T o l b e r t

ke : Supplemental Development Operations Coordinat ion Document OCS-G 6180, High I s l a n d Block A-22 Offshore , Texas

Gentlemen:

I n accordance w i t h thc provis ions of T i t l e 30 CFR 250.34, Walter O i l 6 Gas Corpora t ion hereby submits f o r your review and approval nine (9) copies of a Supplemental Development Operations Coordina t ion Document (DOCD) f o r lease OCS-G 6180, High I s l a n d Block A-22, O f f s h o r e . Texas. Five (5) copier are " P r o p r i e t a r y I n f o r m a t i o n " and four (4) copies are "Public I n f o r m a t i o n " .

Excluded from the Pub l i c Informat ion copies are c e r t a i n ^ . o i o g i c discussions and s t ruc tu re map.

Wal te r 011 & Gas Corpora t ion a n t i c i p a t e s commencing operat ions associated w i t h lease OCS-G 6180, High Island Block A-22 approximately January 15,1992, cont ingent upon approva l o f the necessary pe rmi t s .

A copy of the s u b ' a c t plan has been forwarded to Hr. Floyd Bryan, Geology Department, Hinera l s Management Service, Regional O f f i c e .

Should you have any questions or need a d d i t i o n a l i n f o r m a t i o n , please contact the undersigned at (713) 659-1222.

Very t r u l y yours ,

WALTER OIL & GAS CORPORATION

Judy Archer Regulatory/Environmental Coordinatcr PUBLIC INFneMATJCfl :JA

encInsures

1021 Mam Street, Suite 2200. Houston. Te.ss 770024606 .713)689 1221

WALTER OIL & GAS CORPORATION

SUPPLEMENTAL DEVELOPMENT OPERATIONS COORDINATION DOCUMENT

HIGH ISLAND BLOCK A-22

OCS-G 6180

W a l t r - O i l & Gas C o r p o r a t i o n (Wal t e r ) , as designated operator o f tha subject b l o c k , submits t h i s proposed Supplemental Development Operations Coordinat ion Document (DOCD) l n accordance w i t h the r e g u l a t i o n s contained i n T i t l e 30 CFR 250.34 and more s p e c i f i c a l l y def ined l n the Minerals Management Service L a t t e r to Lessee's and Operators dated October 12, 1988.

W a l t e r O i l 6 Gas C o r p o r a t i o n has been designated operator by Amoco Production Company of that p o r t i o n o f leasc OCS-G 6180, High Is land Block A-22 which l a propoeed under t h i s DOCD.

DESCRIPTION OF DEVELOPMENT ACTIVITIES

Under t h i e Supplemental Development Operations Coordinat ion Docuaent (DOCD), W a l t e r ls proposing one (1) w e l l to bc Involved l n the development and p r o d u c t i o n a c t i v i t i e s associa ted w i t h Block A-22. A caisson w i l l bc i n s t a l l e d over the proposed s u r f a c e l o c a t i o n of Well No. 5, 8800' FNL & 5300' FWL.

P roduc t ion f r o a Wel l No. 5 w i l l t c t r anspor ted through one (1) 4-Inch f l o w l i n e to Wel te r ' s e x i s t i n g Pla t form " A " , Block A - 2 1 , High I s l and Area.

A c t i v i t i e s proposed under t h l a Supplemental DOCD f o r High I s l and Block A-22 w i l l commence January 15, 1992 w i t h p roduc t ion expected to commence as soon aa Well No. 5 i s d r i l l e d and coaplated and proved to be p roduc t ive . The f o l l o w i n g schedule d e t a i l s the c h r o n o l o g i c a l order of the proposed events l e a d i n g to f u l l p r o d u c t i o n .

SCHEDULE OF ACTIVITIES

ACTIVITY APPROXIMATE START-UP DATE

1 . Drive Caisson, OCS-G 6180 Block A-22, Well No. 5 January 15, 1992

2. D r i l l Well No. 5, OCS-G 6180 Block A-22, Well No. 5 After Caisson ls Driven

ln place

3. Install Flowline After Coapletion of Well No. 5

6 . Co-nmenre Produc t ion Upon I n s t a l l a t i o n of Flowline

J

DESCRIPTION OF PLATFORM

A plat shoving the propostd surfses locaclon of the propossd Caisson l s enclosed as Attachment "A". The Caisson w i l l be a 1-pile, 1-slot structure with heliport snd beat landing. A t y p i c a l schematic r f the Calssor detai l ing the elevations l s enclosed as Attachment "B".

A l l hydrocsrbon handling equipment for tast ing and production such as • t f i r i l i r i i tanks and treater* s h a l l ba designed, ins ta l l s . , and operated to prevent pollution.

Maintenance or r e p a i r s which are necessary to prevent pollution of offshore waters shall be undertaken immediately.

Curbs, gutters, d r i p pans, snd drs lns s h a l l b» Instal led ln deck areas ln a Banner necessary to co l l ec t a l l contaainants not authorized for discharge. O i l drainage s h a l l be piped to a properly designed, opereted. and aaintalned sump systea which w i l l automatically a a l n t a i n the o i l at a l eve l su f f i c i en t to prevent discharge of o i l Into offshore waters. A l l gravity drains s h a l l be equipped with a water trap or other means to prevent gas in the sump systea frea escaping through the drains. Sump p i l e s sha l l not be used as processing devices to treat or s k l a l iqu ids , but aay be used to co l l ec t treated-produced water, treated-produced sand, or l iqu ids f r e a drip psns and deck drains snd as a f l n s l trap for hydrocarbon l iqu ids ln the event of equlpaent upseta. Improperly designed, operated or aaintalned suap p i les which do not prevent the discharge of o i l into offahore watera s h a l l be replaced or repaired.

There shall be no disposal of squipaent, cables , chslns , contalnsrs or othsr materials into of fshore waters.

DESCRIPTION OF DRILLING UNIT

The proposed w a l l w i l l be d r i l l e d and completed with a typica l jack-up d r i l l i n g r i g . T y p i c a l diverter and BOP schematics are enclosed ss Attachment " C .

Safety features w i l l include well control snd blowout prevention equlpaent ss described in T i t l e 30 CFR 250.bO. The appropriate l i f e r a f t s , l i f e jackets , ring buoys, e t c . , as prescribed by ths U. S. Coast Guard w i l l be aalntslned on the f a c i l i t y at a l l times.

DESCRIPTION OF PLATFORM

A l l hydrocirbon handling eq.jlpm.nt f o r t u r l n . . » j j . . p . r « t o r . , t . n k . and t r . « t . r r . h . l l .!! j , 1 ! production .ueh p r . . . „ , p o l l u t l „ „ . " ' " " * • h 4 U <"••»«"«. i n s t . l l . d .nd opor.t .d to

S T S . 2 Un^r£.n1^1.t.;""" r y " *

£ S ^ * £ t . « . ^ £ K £ • ' U l p ~ " t - * — • - , . i n . r . or otK.r

DESCRIPTION OF DRILLING UNIT

The proposed well w i l l be d r i l "C".

STRUCTURE MAP A currcr.c structure map of the expected productive formation.! shoving the aurface and bottomhole location of the v e i l s ls enclosed sa At.achment "D". (Confidential copies only)

BATHYMETRY MAP

A Bathymetry Map shoving the surface location oi Well No. !> and the Caisson ln High Islsnd Block A-2? is enclosed ss Attachment "£".

SHALLOW HAZARDS

A site specific shallov hazards analysis for the proposed surfsce location ls enclosed ss Attachment "F". (Confidential copies only)

OIL SPILL CONTINGENCY PLAN

A l l development and production operations shall be performed in cccordance v l t h industry standards to prevent pollution of the environment. Welter Oil a Gas ;orporation's O i l Spill Contingency Plan has been approved by the MMS. This plan designates an Oil Sp i l l Team consisting of Walter's personnel and contr*ct personnel. This team's duties sre to eliminate the source of sny s p i l l , remove a l l sourcea of possible i g n i t i o n , deploy the most reliable means of available transportation to monitor the movement of a sl i c k , snd contain and remove the slick i f possible.

Walter Oil & Gas Corpcratlon ls a member of Clean Gulf Associates (CGA). CGA has tvo permanent equipment bases In Texas, at Port Aransss Galveston, and fiv e bases ln Louisiana, at Venice, Grand I s l e , Intrscoast. City, Houma and Cameron. Each base l s equipped v i t h fast response skimmers and thire is a barge mounted high volume open sea skimmer bssed at Grand Isle , Louisiana. In addition to providing equipment, the CGA alan supplies advisors for clean-up operations. Equipment available from CGA and the base l t ls located at l s l i s t e d ln the CGA Manual, Volume I , Section I I I .

E S t ! r * t t d I ! ! ! ! ! ! ' 1 ? f ° r " - p l 1 1 l n H l « h I * * " * "ock A-22 during normal weather conditiona could vary froa 10 to 11 houra based on tha fo l lov ing:

1. Procurement of boat capable of handling o i l s p i l l contalnaent equlpaent and deployment to nssrsst CCA Base ln Galveston, Texaa

2. Load out of Faat Response Unit and ralated s p i l l containment equlpaent

3. Trsvsl Time to S p i l l Site (40 Miles « 10 MPH)

4. Inland Trave l "lae

Estlasted Tota l Tiae

4.0 hours

2.0 hours

4.0 hours

1.0 hour

11.0 hours

In the «vent a s p i l l occurs froa High Islsnd Block A-22, our company haa projected t r a j e c t o r y of a s p i l l u t i l i s i n g information In t h . Environmental Iapact Statement ( E I S ) for OCS Lease Sales 139/141.

The EIS conta in , o i l s p i l l t ra jec tory s l a u l . t l o n . using seasonal surface currents coupled v i t h vlnd det . . s d j u s t . d every 3 hours for 30 days or u n t i l a C r e s t is contacted. 7

Hypothetical s p i l l t r a j . c t o r i e s vere s i a u l . t . d tor each of the potential launch s i tes across t h . entire Gul f . Ttus . s lauls t ions presume 500 s p i l l , occurring in . a c h of th . four seasons of the year. The resu l t s ln the EIS vere presented as prohabi l l t l s s that an o i l s p i l l beginning froa s par t i cu lar launch site vould contact a certa in land segaent (Table IV-17) v i th in 3. 10 or 30 days. U t l l i i l n g the summary of the trajectory analys i s (for 10 dsys) ss Prtaented on page IV-87 through IV-91 , the probable projected l andfa l l of an o i l s p i l l 1. „ fo l lovs . Also l i s t e d l s the CGA Map Nuaber corresponding to the land segment vhich v l l i be u t i l i z e d to determine environmsntslly senrUtve sreaa that msy be effected by a s p i l l .

ARFA

High Island Block A-22

LAND SEGMENT CONTACT

Galvaston 4 Chambers Co. , TX Jefferson Co. , TX Cameron Parish, LA

CGA MAP NUMBER

112 TX Maps No. 3 4 4 16Z TJ! Map No. 4

4X LA Map No. 5

Section V. Volume I I of the CGA Manual containing maps aa l ia ted above, also Includes containment/clean-up protection response modes for the sensit ive

Section V I , Volum. I I oi the CGA Operationa Manual depicts the protec lon reaponse modes that ars applicable for o i i s p i l l clean-up operations. Each response mode 1. schematically represented to shov optimum deployment and operation of t h . equipment in areaa of environmental concern. Implementation of the suggested procedures sssures the most e f fect ive use of the equlpacnet and v i l l r . s u l t in reduced adverse impact of o i l a p i l l . on the environment, supervisory personnel have the option to modify the deployment snd operstlou of equipment to more e f fec t ive ly respond to s i t e - s p e c i f i c circumstances.

NEW OR UNUSUAL TECHNOLOGY

No new techniques or unusual technology w i l l be required for these operations.

LEASE STIPULATIONS

I n accordance with U a a e Stipulation No. 1 attached to th i s leaae. Protection of Archaeological Resources. Amoco Production Company submitted a Marine High Resolution Geophysical Survey Report with Amoco's I n i t i a l POE.

DISCHARGES

A l l discharges s s soc i s t ed with the development and production of the subject wmll w i l l be ln accordance with the permit l imitations ddresssd in the Environmental Protection Agency NPDES General Permit for the Gulf of Maxico.

Dlschar as w i l l contain no free o i l and w i l l be in coa.pli.nce with and monitored in accordance with the aubject permit. Any d r i l l i n g f l u i d contaminated with o i l w i l l be transported to .hor . for prop.r disposal « t an authorized disposal a i r e .

S o l i d domestic wa.tes w i l l be transported to shore for proper dlspossl at an authorized disposal s i t s .

Sewage wi l l be treated on location.

The permittee i a authorized by the General Permit to discharge t h . . f f l u e n t s l i s t e d ln the fol lowing table. Such dischsrges w i l l be l imited snd monitored by ths permittee aa spec i f i ed below:

Discharge and Monitoring Requirements Ef f luent Discharge Measurement Baas*!* Recorded Character is t ic Limitat ion Frequency Type/Method Value(a)

DECK DRAINAGE

Free Oi l No Free Oi l Once/day j . /

Volume (barrels) - - - -

PRODUCED WATER

72 mg/ 1 d a i l y max.

48 mg/ 1 monthly avg.

Oil & Creass

Flow (MGD)

PRODUCED SAND

Free Oil

Weight (lba)

WELL TREATEMENT FLUIDS 5/ COMPLETION FLUIDS 5/ WORKOVER FLUIDS 5/""

No Free Oil Once/day 4/

Free Oil No Free Oil Once/day 4/

Visual/Sheen on receiving water

Once/Month Estimate

Once/Month Grab 3/

Once/Month Estimate

Visual Sheen on receiving water

Once/month Estimate

Visual Sheen on receiving water

Number of Days Sheen Observed

Month Total 2/

L i l l y Maximum & Monthly Avg.

Monthly Avg.

Numbers of Days Sheen Observed

Mthly iotal 2/

Number of Days Sheen Observed

Monthly Total 2/ Volume (barrels) - - - - Once/month Estimate

SANITARY WASTE 6/ (Continuously manned by 10 or more persons)

Residual Chlorine 7/ 1 mg/l Once/mon-h Grab Concentration

Flow (MGD) Once/month Estimate Monthly Avg. 2/

SANITARY WASTE (Continuously manned by 9 or fewer persons or Intermittently by any number)

Solids No Float 1PR Once/dsy Sol ids

Observation 8/ Number of Days Solids Observed

DOMESTIC WASTE

Solids No Floating Once/day Observations8/ Numbor of Dsys $o - Ids So l i c s Obs*r"*d

DESALINIZATION UNIT DISCHARGE; BLOWOUT PREVENTER FLUID: UNCONTAMINATED BALLAST WATER; UNCONTAMINATED BILGE WATER, MUD, CUTTINGS >-NL CtMENT AT THE SEAFLOOR; UNCONTAMINATED SEAWATER; BOILER BLOWDOWN; SOURCE WATER AND SAND

Frss Oil No Frss O i l Once/day4/ Visual/Shaen Number :>f Dsya on receiving Sheen Observed water aurface

J7 When discharging snd f a c i l i t y l s manned. Monitoring shai be accomplished during daylight by visual observation of the receiving water surface in the vic inl ' .y of the discharge.

2/ This information s h s l l be recorded, but not reported un'es.i otherwise requested by EPA.

3/ May be based on the arithmetic average of four grab sample resul ts in the »wenty - four hour period. The .egional Administrator may approve an a l ternat ive test irethod on a caae-by-caae bas is .

4/ When discharging. Monitoring s h a l l be accomplished during dsylight by visual observation of the rece iv ing water surface in the v i c i n i t y of the discharge.

5/ No discharge of p r i o r i t y pollutants except in trace an.-unts. Information on the spec i f i c chemical composition s h a l l be recorded, but not reported unleaa requested by EPA.

6/ Any f a c i l i t y which properly operate* and maintains a marine sanitation device (MSD) that complies with pollution control standards snd rsgulst ions under Section 312 of the Act ohall be deemed to be ln compliance with permit l ln. i i . i t l m s for sanitary waste. Tlie MSD s h s l l bc tested y e a r l y for proper operation and test re su l t s maintained at thc f a c i l i t y .

IJ Hach method CN-66-DPD approved. Minimum of 1 .ig/l and maintained as cloae to t h i s concentration as possible .

8/ Monitoring s h a l l be accomplished during davl lgrt by v i sua l observation of tha surface of the rece iv ing water ln the v i c i n i t y of s snl tary and domestic waate o u t f a l l s . Observation! s h s l l be ma e following either the morning or mid-day meals /.nd at a time during daylight and maximum estimated diacharge.

Discharges w i l l bc free of o i l and w i l l be ln compliance with and monitore-1 aa required by EFA NPDES General Permit (GMG 290000) in accordance v i th 40 CFR 122-6. Any o i l contaminated mud w i l l be transported to shore for proper disposal.

A discuaalon of the quantity, rates of alscharge and composition of sol id and liquid wastes arc enclosed aa Attacnments "G" & "H".

HYDROGEN SULFIDF

on t h . d r i l l i n g of OCS-C 6 I 8 0 ~ . i l No I S I U r f C } a " l f l c " i o n ft. b . . . d pr . . .nc . of hydrog.n . u l f i d . w.1 not ' .ncoufr ^ B 1 ° C k k ' U t h . ^ r a t i o n . . W.11 No. A i . I M J S - T I • n c o u n t « r # d d « r i n g t h . cour.. of

m of High i. i a n d tt^a?2 .^aft'srs I^T FSL 4

* 1 1 No. 5 propoaad aurfac. location. " " " . i y two (2) m i l , , f r o m Walt.r*. " " o n ^ ^ r : b r r X * . t : 1 t t J . t T . l t d 1 % 3 ° , 2 5 ° - 6 7 - ° " 4 G.8 *0«M « r . m a n

y J n T ^ m m ^ t * ! d « « ™ i n « t i o n b . M d . by t h . MMS that S i c o n f i r - d . W h * r * t h # - b " n c « of hydrog.n . u l f i d . hal b . . I

PROJECTED EMlSsrnwg

ProJ.ct.ci Ea.l..lon. a r e . n c l o g # d a g A t t a c n - € n t „v,

ONSHORE BASE

Alt.chMnt -J" . r . i . t l v . to t h . . h o r . l l n . i . . n c l o . . d „

No „„.hor. .«pin.""1„r

,,

c

r

0

,

n.;r*uc

P?"0 " ».r .uppll.. Z thl< . c t l v l t , . or con. t ruct lon 1 . . n t l c l t . . ; . d w l t h r . . p . c t to

T h i s bssa ia capable of providing ths s s r v i c s s nscssssry for ths propossd a c t i v i t i e s . I t haa 24 hour bervice, • radio tower with a phone patch, dock apace, equlpaent and aupply storage baae, drinking and d r i l l watar, ate. During d r i l l i n g a c t i v i t l a a or* crew boat w i l l be asking three (? ) t r i p s per week and one (1) aupply boat w i l l be making two (2) t r ipa per week. During completion a c t i v i t l a a ona (1) crew boat w i l l be asking one (1) t r i p par week and one (1) supply boat w i l l be making two (2) tr ipa per week; during production a c t i v i t i e s ona (1) supply boat w i l l be aaklng one (1) t r i p per aonth and one (1) he l icopter w i l l be aaklng seven (7) t r ips per week.

Tha rushore a c t i v i t i e s associsted with High Is* nd Block A-22 should not r a a u l t ln any lncreaae in the size and number of o .> sl tM e support snd storage f a c i l i t i e s or land and personnel requlreaente.

AUTHORIZED REPRESENTATIVE

I n q u i r i e s aay be made to the following authorized repreaentative of Waltet O i l & Gas Corporation:

Judy Archer Regulatory/Envlronme - Coordinator Walter Oi l t> Gas Corporation 1021 Hain Street, Suite 2200 Houaton, Texas 77002-660:, (713) 659-1222

L I S T OF ATTACHMENTS

A. Loc. tion Plat of Walls B. Schcaatlc of Propoaad Caisson C . Dlvsrtar snd BOP Schematics E . Bathymetry Map H. Mud Components Tabls I . Projected Air Emissions J . Vic ini ty Msp

SUPPLEMENTAL DEVELOPMENT OPERATIONS COORDINATION DOCUMENT

HIGH ISLAND BLOCK A-22 OCS-G 6180

WELL LOCATION

Attachment "A"

WELL NO. LOCATION TOTAL DEPTH WATER DEPTH

5 PSL: 8800' FHL 6 5300' FWL of High Island Block A-22

±62'

A-20

WALTER O B O

A-21

b.wp_ -J«—taam Locotion

BLK. A-22

WALTER OH ft GAS CORPORATION OCS-G-6160

A-37

TEXAS SQVTJi CtNTRAl ZONE NAC 17

\

P**pa+»d by

WALTER CIL ft GAS CORPORATION

OCT i f t t i prynpi^urwr npr»A-nnw^ CQQRpmATTOM noguimcr

HICH ISLAND BLOCK A-22

DlVERTOR LAYOUT FOR ROWAN TEXAS

2 1 - 1 / 4 2OOO0 ANNULAR

8* DEHCO B*'. 8* SERIFS

SCH 80 PIPE (6 FT. LONG,

. VALVE 600

SLOT WITH ACTUATOR (TYPICAL ON BOTH SIDES)

RIG ROWAN T E X « S

PROCEDURE: DIVERTOR VALVES (KNIFE TYPE GATE VALVES) ARE

NORMALLY IN CLOSED POSITION. VALVES OPEN AUTOMATICALLY WHEN HYDRIL IS 1 CLOSED YOU MAY THEN MANUALLY SELECT EITHER PORT OR \STARBOARD S TO DIVERT. THE CONTROL PANEL TO SELECT THE OPENING IS LOCATED ON THE/ DR1LLFLOOR

DE GATE VALVE

ROWAN-TEXAS

BLOWOUT PREVENTER STACK

1 . 13 -5 /8" HYDRIL, ANNULAR BOP - TYPE "GK" , 5,000 PSI WITH A 5000 PSI 6BX TOP CONNECTION AND 10 ,000 PSI 6BX BOTTOM CONNECTION, H2S TRIMMED.

2 . 13-5 /8" CAMERON DOUBLE BOP - TYPE " U " , 10,000 PSl WP, H 2S TRIMMED.

3 . 13-5/B" CAMERON SINCLE BOP - TYPE " U " , 10,000 PSI WP, H 2S TRIMMED.

4 . 4 -1 /16" MANUAL GATE VALVE - CAMERON TYPE " F " , 10 ,000 PSI , H 2S TRIMMED.

5 . 4 -1 /16" REMOTE HYDRAULIC VALVE - CAMERON TYPE " F " , 10 ,000 PSI , R2S TRIMMED.

6 . 3" 10,0001 CHOKE LINE - FROM CHOKE MANIFOLD, H 2S SERVICK.

7 . 2 -1 /6" MANUAL GATE VALVE - CAMERON TYPE " F " , 10,000 PSI , H 2S TRIMMED.

8 . 2 -1 /6" CHECK VALVE - CAMERON TYPE "R", 10 ,000 P S I .

9 . 3" KILL LINE - FROM CHOKE M/.NITOLD, H 2S SERVICE.

rtPTH I M f : M"P COMPONENTS

COMHON CHEMICAL OR CHEMICAL TRADE NAME

Aluminum Stearate "AXTAFLO-S" Barite Calcium Carbonate Calcium Chlordie Calc.ua Oxide Cal dun Sulfate Carboxymethyl Cellulose Caustic Potash Caus-ic S«*i Chrome Lignite Chrome Lignosulfonate Drilling Detergent Ferrochrome Lignosulfonate Gel

Gypsum Lignite Lignosul fonate •Mud Sneer" "MOR-REX" m a

•Shale-TroT Soda Ash L . Sodium Bicarbonate-Sodium Carboxymethyl Cellulose Sodium Chloride Sodium Chromate Starch •YX-9010" "TORQ-Trin •Black Magic" . •Black Magic Supermix Oiesel

•Or" -"Uke"

•pipe-Lax" •vail-Nut" Wood Fibers

p ^ p i p T i n « OF MATERIAL

Aluminum Stearate Nonionic Surfactant Barium Sulfate (BaSo4) Aragonite (CaCo3) Hydrophilite (CaCU) Lime (Quick! Anhydrite (CaS04) Urboxymethyl Cellulose Potassium Hydrate Sodiua Hydroxide (NaOH) Chrome Lignite Chrome Lignosulfonate

A t o x i c , biodegradable defoamer bentonite.

attapulgite CaSo4.2H20 Lignite Lignosulfonate Cement Pre-flush Hydroloyzed Cereal solid C-gano-aluminum comp.* Sodium Acid Pyrophosphate Sodiua Carbonate SodlS Carboxymethyl Cellulose NaCI NaCr04.10H20

Oil base mud cone. d

K S t f t w i , shreddee.cellophane Loss-circulation Mterl.1 Surfactant mixed .Uh diesei Ground walnut shells Loss-circulation mate, iai

t f WALTER OIL & CAS CORPORATION

PROJECTED AIR EMISSION SCHED' LE FOR SUPPLEMENTAL DEVELOPMENT OPERATIONS

COORDINATION DOCUMENT

General Information

Location of F a c i l i t y

Distance Offahora: Name of Rig: Structure: Operator:

Contact Person: Well Footage to be Drilled; Date D r i l l i n g W i l l Begin:

Righ Islsnd Block A-22 OCS-G 6180 40 Miles Jack-Up, Well No. S Calssion No. 5 Walter Oil & Gas Corporation 1021 Main Street, Suite 2200 Houston, Texaa 77002-6605 Judy Archer

i

January 15. 1992

Hajor Source (Offshore)

Power used aboard d r i l l i n g vessel, approximate footage to be d r i l l e d . *

Emitted Substance

CO S02 NOx VOC TSP

Projected Emissions »« Tons/Year

1992

2.38 .76

11.16 .90 .79

Based on 60 hphr/ft. Offshore Oil snd 450/3-77-026, June, 1977

from Table 4-5, "Atmospheric Emissions from Gss Development snd Production", EPA No.

** Emission fsctors from Tsble 3.3.3-1, "Compilation of Air Pollutant Emiasion Factors", Third Edition, EPA Report AP-42, August, 1977

1021 Ms.n Street. Suits 2200 Houston. T e n s r7002-66O5 f7l3) 659-1221

Projected Air Emissions Walter O i l & Caa Corpora t ion High Island Block A - 2 2 , Well No. 5 Caisson No. 5 Page Tvo

Minor Sources ' O f f a h o r e ) *

During comple t ion , one (1) crew boat w i l l be aaklng one (1) t r i p per week and one (1) supply bost w i l l be aaklng two (2) t r i p s per weak.

Ealt ted P ro j ec t ed Emissions Subatanca (Tons/Year)

1992

CO .00 S02 N/A NOx .01 VOC .00 TSP N/A

During p r o d u c t i o n , one (1) supply boat w i l l be making one (1) t r i p per month and one h e l i c o p t e r w i l l be making aeven (7) t r i p a per week (baaed on twelve months o f p r o d u c t i o n ) .

Emitt*d P ro j ec t ed Emissions Substance (Tons/Year)

1992

CO .15 SO 2 00 NOx .01 VOC .01 TSP .01

Tables 3 . 2 . 1 - 3 . 3 / 2 / 3 - 1 . "Compi la t ion of A i r P o l l u t s n t Emission Factora", T h i r d E d i t i o n , EPA Report AP-42, August 1977.

TOTAL ALL SOURCES ( tons /year )

1992 CO S02 NOx VOC TSP

Major 2.38 .76 11. 16 .90 .79

Minor .15 .00 .02 .01 .01

Total 2.53 .7fc 11.18 .91 .80

Projected Air Emissions Wsltsr Oil & Gss Corporation High Islsnd Block A-22. Well No. 5 Caisson No. 5 Psge Two

Onshore Sources

These should be about the same as minor sourcss unless new fec i l i t ies are Inatalled at the onahore base. No additional fac i l i t ies ere required or plsnned at this tima.

Emission Exemption Determination

2/3 For CO: E - 3400D - 3400 (40) - 39,015 tons/year For NOx, VOC, TSP t, S02: 33.3D - 33.3 (45) - 1499 tons/ysar

Predicted Production and D r i l l i n g A c t i v i t y at Platfcrm

"*a Production -Oil Production -Date Production W i l l Begin - Approximately March, 1992

Transportation Services

Crew Boats (2500 hp) Trips Per Week During D r i l l i n g - 3 Trips Per Week During Completion - 1 Trips Per Week/Month During Production - 0

Supply Boats (3000 hp) Trips Per Week During D r i l l i n g - 2 Trips Per Week During Completion - 2 Trips Per Month During Production - 1

Helicopters Trips Pcr Week During D r i l l i n g - 0 Trips Per Week During Completion - 0 Trips Per Week During Production - 7

Methodology

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

Aa per DOI/MMS regulations, t h i s f a c i l i t y Is exempt from further a i r quality review as i t has been determined that Its operations w i l l not have a significant adverse environmental impact on air quality.