In Reply Refer Toi FO-2-1 May 23. 1908

Texaco, USA Attention: Nr. J . A. Newton Pott Offlct BOH 60252 Mew Orleans. Louisiana 70160

Gentleaa»s

Reference 1s aade te your Supplemental Flan ef Exploration received Nay 13. 1988. for laasft flCfre frOOO. Block A-118. Brazos Area. This plan Includes the activities proposed for Sel ls 8. C. and D.

In accordance with 30 CFR 250.34, revised Deeeaber 13, 1979. and our letter dated January 29. 1979. this plan 1s hereby determined to be complete and 1s now ?1ng considered for approval.

Your plan control nupfeer is SrJU30 and sbouid be referenced 1n your coaraunl-catlon and correspondence concerning this plan.

Sincerely yours.

(Orifc. Sgd.) A. Drnild Giroir

D. J. Bourgeois Regional Supervisor Field Operations

bcc: Lease OCS-G 6090 (OPS-3-2) (FILE ROOM) fOPS-3-4 w/Publ1c Info. Copy of the plan (PUBLIC RECORDS)

LTHerbst tcck:05/18/88:poecom

Office of Program Services

MAY 2 6 1988 'nformation Service*

Texaco USA PO Box 60252 New Orleans A 70160

May 13, 1988

Regional Supervisor Office of Field Operations Minerals Management Service 1201 Elmwood Park Blvd. New Orleans, Louisiana 70123-2294

900472 - OCS-G 6090 BRAZOS BLOCK A-118

OFFSHORE TEXAS SUPPLEMENTAL PLAN OF EXPLORATION

Dear Sir:

In accordance with the provisions of Title 30 CFR 250.33, and your letters of January 29, 1979, and October 22, 1981, we hereby submit for your approval nine copies of a Supplemental Plan of Exploration for federal lease OCS-G 6090 at Brazos Block A-118. Should any additional information be required, please contact Mr. D. S. MIIH by telephone at (504) 595-1434.

Your early approval of this plan will be appreciated.

Yours very truly,

TEXACO PRODUCING INC.

' r v 7 J . A. NEWTON Land Manager Southern Exploration Division

DRD:pal a:P EDRD1. BUC I Attachments

SUPPLEMENTAL PLAN

OF EXPLORATION

TEXACO PRODUCING INC.

FEDERAL LEASE OCS-G 6090

BRAZOS BLOCK A-118

MAY, 1988

SUPPLEMENTAL

PLAN OF EXPLORATION

TEXACO PRODUCING INC.

FEDERAL LEASE OCS-G 6090

BRAZOS BLOCK A-118

MAY, 1988

TABLE OF CONTENTS

PAGE

EXPLORATION PLAN

Description of and Schedule

for Exploration Activities 1

Description of Rig and Safety Equipment 1

Geophysical Equipment 2

Location of Proposed Wells 2

Current Interpretation 2

Oil Spill Contingency Plan 3

Onshore Support Bases 4

Drilling Mud Components and Mud Additives 4

Projected Air Emissions Report 4

Drilling Hazards Assessment 5

Archeological Assessment 6

Lease Stipulations 6 Appendix

SUPPLEMENTAL

PLAN OF EXPLORATION

TEXACO PRODUCING INC.

FEDERAL LEASE OCS-G 6090

BRAZOS BLOCK A-118

Description of and Schedule for Exploration Activities

Texaco Producing Inc.'s supplemental exploration plan for Brazos Block A-118

includes the drilling and completion of an additional three (3) exploratory

wells to evaluate federal lease OCS-G 6090. These wells are scheduled to

commence on or about June 1, 1988, a total of 186 days of operations are

planned.

Description of Rig and Safetv Eouipment

Depending on the availability of rigs, the proposed wells will be drilled with

a semi-submersible rig similar to the Diamond "M" Century. Included in the

Appendix are the rig specifications for the Diamond "M" Centur>. The speci­

fications for the actual drilling vessel and safety equipment to be used will

be subnitted along with the application for permit to drill. The rig used to

drill the exploratory well under this plan will contain and maintain a

diverter system, blowout-preventers, auxiliary equipment, and mud testing and

monitoring equipment. Drilling operations will be conducted in a manner so as

to maximize pollution prevention in accordance with OCS Orders. Should a well

Indicate the presence of commercial reserves, the well will be temporarily

abandoned and a well protector may be Installed to facilitate completion of

the well at a later date. Well Abandonment procedures will be in accordance

with 30 CFR 250.113.

Geophysical EQUipment

All geophysical work prior to the commencement of exploratory drilling

operations has been completed. No other geophysical work is presently planned

for the lease. If it is subsequently determined that additional work is

required, conventional CDP reflection methods will be used.

Location of Proposed Wells

Attached is the vicinity map, which shows tha location of Brazos Block A-118

relative to the Texas shoreline, and the locations plat, which provides the

surface and bottom hole locations, nroposed total depth of the wells, and the

water depth at the surface locations.

Current Subsurface Geologic and Geophysical Interpretation

Included in the Appendix are the subsurface structure map and the geologic

cross section which reflect the current subsurface interpretation of the

geologic and geophysical data 'n the area. These data are considered

confidential by Texaco Producing Inc. and should be exempt from disclosure

under the Freedom of Information Act 5 U.S.C. 552. These data are intended

for use by authorized Minerals Management Service personnel only.

Oil Soill Contingency Plan

In accordance with 30 CFR 250.42, Texaco Producing Inc. has on f i le with the

Minerals Management Service an Oil Spill Contingency Plan which has been

approved by the Minerals Management Service by letter of September 24, 1987.

Texaco Producing Inc. is a member of Clean Gulf Associates (CGA) and, as such,

has access to a stock-pile of oil spill containment and clean-up materials for

use in the offshore and estuarine areas. There are several CGA bases which

are strategically located along the Texas, Louisiana, Alabama and Florida

coastlines of the Gulf of Mexico that have the personnel, materials and

equipment necessary to control and clean up oil spills. The closest CGA base

at Rockport, Texas is within 105 miles of the proposed drill sites. Based on

the distance from this CGA installation to the proposed drill sites, we

estimate a travel and deployment time of personnel, material and equipment at

approximately 12 hours.

Onshore Support Bases

Two onshore bases will be used to support the proposed operations: one in

Freeport, Texas and, the Texaco dock at Morgan City, Louisiana. From these

bases personnel, supplies and materials will be transported by boat to the

proposed drill sites. Additionally, personnel may be transported to and from

the drill sites by helicopters which are based at Petroleum Helicopter, Inc.'s

facilities at Amelia, Louisiana and Morgan City, Louisiana.

Drilling Mud Components and Mud Additives

Included in the Appendix are listings of the drilling mud components and mud

additives which are normally used during drilling operations.

Projected Air Emissions Report

The projected air emissions report, which is included in the Appendix,

reflects the highest estimated emissions of total suspended particles (TSP),

sulfur dioxide (S02), nitrogen oxides (N0X), carbon monoxide (CO) and volatile

organic compounds (VOC) for a 186 day period of continuous lease operations.

Upon comparison of the estimated emissions to the emissions calculated using

the exemption formulas, 1t was determined that the proposed exploration

activities were exempt from further air quality review. Based on these data,

it has been determined that these planned activities will not cause any sig­

nificant effect on the air quality of the onshore areas.

Drillinq Hazards and Assessment

A hazards and archeological survey was conducted over Brazos Block A-118

concerning the following drill sites:

B 6C0' FNL and 3750' FEL of BA A-118

C 600' FNL and 3250' FEL of BA A-118

D 600' FNL and 3250' FEL at BA A-118

The data collected from this survey included sparker magnetometer, side scan

sonar profiles and pinger profiles. These survey data along with available

CDP seismic were reviewed to evaluate the proposed drill site: for potential

drilling hazards.

The following shallow hazards report shall apply to the surface location for

well MB" as well as the surface locations for "A\ "C" and "D\

The water depth at these locations is approximately 308 feet. The seafloor is

flat and slopes to the southeast at an approximate rate of 1? feet per mile.

Near surface bedding is inferred to consist of very soft to *;.ft clays and

silts to a depth of at least 30 feet.

Evidence of surface or near surface faulting is observed near the well site.

The nearest fault is 1200 feet from the location and the fault trace is

down-to-the south. Shallow faulting will not intersect the well bores.

Shallow "bright spots" are not observed in the vicinity of the proposed

location.

Archaeological Assessment

There are no known archaeological or cultural resources located on Brazos

Block A-118.

Lease Stipulations

STIPULATION NO. 1 - CULTURAL RESOURCE

APPENDIX

Rig Specifications for "Diamond M Century

Vicinity Map

Location Plat

Subsurface Structure Map

Geologic Cross Sections

Drilling Mud Components

Mud Additives

Projected Air Emissions Report

DRILLING VESSEL DESCRIPTION AND SPECIFICATIONS

NAME:

YEAR BUILT:

CLASSIFICATION:

DIAMOND M CtNTURY

?973

AB.4 MALTESE CROSS Ai DRILLING UNIT

1. Operating Capabilities

2.

A. W iter Dep:h Capacity - 7C0 ft.

B. Drill; Dep'h Capacity - 30,000 ft.

C . Operaticnal Maximum Wave Height 40 ft.

D. Design Wav«? Height 68 ft.

E. . Design V. ind Velocity (sustained) . 1"0 knots

Principal Characteristics

A. Platform

1) Lengr ISO ft.

2) Beam !38 ft.

B. Hulls (2)

1) Beam 35 ft.

2) Length 270 i t .

3) Beam (. ut to out) 173 ft.

C Baseline to Main Deci- 85 ft.

D. Ba -line to Pipe Rack SS ft.

E . Basv.-iine to Ri / , Moor 118.25 ft.

F. Displacement

1) Lightship (17 i<. d aft)

2) Ocean Tow (23 f t . draft)

3) Field Move \23 ft. draft)

4) Drilling (50 ft. draft)

7,758 . on^ tons

9,350 long tons

10,800 long tons

15,000 long tons

Diamond M Century

•age 2 \

G. Var abie Deck Load

1) OC'ian Move •-.. 1,300 short tons

2) Field Move 1,850 short tcr.„

3) Gri l l ing

.•• * \

2,240 short tons

H. Natural Pe-. .*•; >'

1) Heavt

2) Roll

t 16.42 sec.

31.75 fee.

* 3) Pitch

J. Ci j> nci ties

; 28.2C t^c .

A . B-jJk Tanks •

9,120 c u . l t .

B. S^ck Storage 3,500 sacjes

C Fuel • 5,100 bbls.

D. Potable til'Ater 409 bbls.

1. Dr i l l Wav*- 9,800 bbls.

r . Mud tarn:., 1,5*9 bbls. •

C. Quarters • fik man * 6 man h i a t a l

• 4. 5. itps Equipment

A. . 'ower System

I) Main Diesel Generators •

2) Emergency Diesel Generators -

Two (2) EMD 16-4.ft5.-ES Diesel Engines, 22C0 HP Lach driving EMD 1500 KW A** Generators. One (1) EMD 8-645-E8 0- .ss Engine, UOO HP, driving Eton 700 ixW AC gen?rator.

One (1) Caterpillar D-334 engine driving 175 KW AC Generator.

I

diamond M Century

Page 3

3) Power Distr ibuaon -

B. Air System

1) Main Air Sysrem^-

2) Emergency Air C'rryresior -

3) Bulk System -

C . Cranes -

D. Welding Macnines -

E. Salety Equipment

1) Fire Fighting i-quipment

2) Life Jackets -

3> Liferafts-

4) Lifeboats -

F . Helicopter Deck -

G. Communication Stations -

ft. Distillation Unit -

I. Sewage Treatment System -

r.a,lor € b*y SCR System 750 V, 1000 amps .

Tv;, • 2) Ingersoii Rand air compressor 504 CFM each at 125 psi.

Diesel driven cold start compressor.

C.to \ i ' Bulk air -cni^essor 40 psi.

Two (2) Link B-lt A3S 238 50 ton.

Three (3) Lincoln DC rectifier tv;>e.

One (I) Lot portable fire extinguishers as per U.S.C.G., CO Flooding System and dry chemical system.

As pp U.S.C. i.

Four ;'.) 8-ma \ J . S . C . G . approved.

Two '?.) 28-mar. urvival capsules U.S C G . appro*'*

Heiipor : designed io accomodate a Sikorsky S-6 IN Helicopter.

Single 5 B a n d , AM marine Radio telephone and complete intercom system w/loud speaker. -

One (1) 300-GPH MECO Unit.

Red Foxx design.

DIAMOND M CENTURY

INVENTORY -

EQUIPMENT, TOOLS, MATERIALS, SUPPLIES AND SERVICES

1. D r i l l i ng Vessel Description and Specifications

a. Moorings - Eight (8) 2£" dia. chains 3800' !,...g.

b. Anchors - Eight (8) 30,000 Jb. Bnlrft Moorfast. One (1) 30,000 ib. Iddt. Moorfast Upare).

c. Moorinrj wind'asses - Four (4) double drum type with wildcat for 2fc" chain; 497,000 I t . s ta l l .

d. Anchor buoys - Eight (8) designed for 700 f t . wate» depth.

e. Pend nt wires, shackles and associs* »d jewelry.

f . %Cne (1) mooring line tension sensing and indicating system wi th eight (£5 channel recorder.

. g. Vessel position reference system - Honeywell RS-505 Acoustic indicator

and riser angle indicator.

2. Dr i i l ing Eqiapment

a. Drawworks - Oi lwel l E-3000 dr i /en by two (2) EMD D-79 DC motors, * i t h Baylor 7838 electr ic brake and Crown-O-Matic.

b. D r i l l l ine - Ifc" dia., 7,500 f t . long IWRC wire rope.

c Wirel ine anchor - National, designed for ifc" wire rope.

d. Sandline - 9/16" dia. 15,000 f t . long gpJvanized wire rope.

e. -Derr ick and substructure - 160 f t . derrick with 1,000,000 Jb. hook load capaci ty , 50 f t . x 50 f t . welded substructure.

f. Mud Pumps - Two (2) Oilwell 1V0J PT Triples pumps wi th pulsation dampeners. Each driven by two (2) EMD D-7? DC motors. Mud pumps to be charged by two (2) 6 x 8 centrifugal pumps.

g. Rotary Table - Oi iwei i 37;i" table driven t v EMD D-75 DC motor.

h. Ke i i y Drive Bushing - Varco 27HDP for 37K." rotary.

Uiamona M Century

Page 2 »•

i. Crown BJock - Continental Em*co seven (7) sheave type.

j . Hook Biock - OilvelJ 65C ton capacity with BJ 5500 Dynaplex hook.

k. Traveling Block Guide System - Two-rail system design.

1. Swivt. - Oilwell PC-650.

m. Rotary Ho.se - Two (2> ea«;;i, installed in derrick 3" x 60' 10,000 psi test,

n. Weight indicator - Martin u »cker Type E with E-80 sensator.

c . Electric Power Supply - described in Part 2.

p. Kelly Sinner - Varco Mod i t-500.

q. Drilling Recorder - Cne (1) foi.. channel recorder for weight, pump pressure, torque and rotary RPM.

3. Drill String

a. :Dri l l Pipe

(1) 10,000 ft. - aft" O D., Grade E, 16.60 lb/ft. Range 2 drill pipe, quench and temper, w i W XH x 6-3/8" O.D. 18-degree taper, uitr-tonicaliy in ected tool joints and internally plastic coated.

(2) 5,000 ft. - * » " O.D. Grade S-135 16.60 lb/1;. Range 2 drill pipe, quence and temper, with 4h" XH x 6-3/8" O.D. 18-degree taper, uhrasonicaliy inspected tool joints and internally plastic coated.

(3) 33 j o i n s - W O.D. 5C lbs./ft. Range 2 Hevi Wate Drill Pipe w / W XH tool joints.

(4) Pup Joints - two (2) each 6\ 10' and 15' long. Grade S-135.

b. Drill Collars

(1) Twenty (20) 7-3/4" O.D. x 2-13/16" l.D. x 30' long collars.

(2) Twenty (20) 6%" O.D. x 2-13/16" I.D. x 30' long colla s.

(Note: Drill collars recessed for ehvator and si p handling, have API connection and stress 'eiieved grooves on pins and bore back in boxes. Threads and stress reliel grooves cold worked and treated lor anti-galling.)

i

Diemopd M Century

Page 3 mm •

c . KelJy - Two (2) 5fc" Hex type.

d. Subs and Bit Subs - As required for contractors drill string.

e. Sufficient box and pin thread protectors for all contractor's equipment.

f. Bit Breakers for 26", I W , 12K" and.aJi".

4. Blowout Preventers, Subsea Equipment and Control Equipment

a. Diverter System - Regan Model KFDH»3.

b. One (1) 30" C.I.W. Pin Connector.

c . 18-3/4" - 10,000 psi WP BOP stack consisting of the following major components:

(1) Flex Joint - 18-3/4" with RCK connector.

(2). Riser Connector - C l .W. 18-3/4" - 10,000 psi WP Collet connector.

(3) Annular Preventer - Shaeffer 18-3/4" - 3000 psi.

(4) Ram preventer - Two (2) double type "U" Cameron 18-3/4" - 10.00Q psi WP BOP's.

(5) Wellhead connector - Vetco H-4 -18-5/4"-10,000 p s i W.P. connector.

d. BOP Kill and Choke Line System

(1) Master valves - Two (2) CIW 10,000 psi WP 3-1/8" right angle failsafe valves hydraulic open, hydraulic close.

(2) Operating valves - Two (2) CIW 10,000 psi WP 3-1/8" straight through valves, hydraulic open, hydraulic close.

(3) Flex Joint Jumper Connection - Two (2) Flexible Chiksan 10,000 psi WP choke and kill lines.

e. Miscellaneous Equipment Items •

(1) Installed in BOP:

(a) Three (3) sets W rams complete with long life ram rubbers.

(b) One (1) set shear rams complete.

(c) One (1) annular bag element.

Diamond M Century

Page a '

f. Marine Riser - 600 ft. of C.I.W. 20" X-52 Riser with RCK connections and integral choke and kill lines. Riser pup joints 10 ft , 20 ft., and 40 ft. Jorffc.

g. Slip Joint - One (1) for 20" riser with 40' stroke with dual packer with split inserts. Material of slip joint X-52 inner and outer barrel with RCK box connection.

h. Choke and Kill Hoses

Two (2) each 3" I.D. 10,000 psi WP rotary hose.

i. Marine Riser Tensioning System

(1) Four (4) Rucker tensioning units designed for 50' line travel and maximum line load capacity of 80,009 lb. tension.

(2) Four (4) idler sheaves.

(3) Control panel.

j . Guideline Tensioning System

(1) Four (4) Rucker tensioning units, each with 40 ft. line travel and maximum line load capacity of 16,000 Ib. tension.

(2) Four (4) idler sheaves,

k. Pod Line Tensioning System

Two (2) each Ingersoll Rand K6UAL hoists with constant tensioners.

1. BOP Accumulator Unit - Koomey air-electric powered 660 gal. accumulator unit, 3000 psi.

m. Blowout Preventer Control Panels

(1) Master control panel located on rig floor adjacent to driller's console.

(2) Remote control panel located in toolpusher's office.

(3) Complete manual control at accumulator unit.

(4) All control panels to be graphically illustrated.

n. Hydraulic Control Hoses - Two (2) hoses designed for 700 ft. water depth,

o. Hydraulic Control Pods - Two (2) Koomey type, fully redundant.

Diamond M Centurv

Page 5

p. Choke Manifold - 10,000 psi w.p. wi th Cameron Type F gate valves, two adjustable chokes and one remotely operated Swaco Super Choke.

q . Surface BOP test manifold.

5. Downhole Tools and Equipment

a. Casing Protectors: 100 each wi th installation tool .

b. Control Valves

(1) One (J) inside Gray BOP, wi th 4h " XH connections.

(2) Two (2) lower kel ly valves, 10,000 psi W.P.

(3) Two (2) upper kelly valves, 10,000 psi W.P.

c. Conplete set running tools for Vetco sub-sea wellhead. 6. Fishing Tools

a. Overshots

• \J) One .(1) U K " O.D. Series 150 Type FS Bowen Overshot, w i th grapples* to catch 9U" D.C. and 7-3/4" D.C.

(2) One (1) 8-1/8" O.D. Series 150 Type FS Bowen Overshot, with grapples to catch 6" D.C. and 5" D.P.

b. 3unk Subs

(1) One (1) Bowen 12-7/8" O.D. for 17K" hole with 7-5/8" API Reg. Connection.

(2) One (1) Bowen 9-5/8" O.D. for 12K" hole with 6-5/8" API Reg. Connections.

(3) One (1) Bowen 6-5/8" O.D. for 8)4" hole with W LF. Connection.

c. Taper Taps for contractor dr i l l str ing.

7. Dr i l l Str ing Handling Tools

a. Tongs, slips, elevators, links for W O.D. dr i l l pipe, 7-3/4" and 6" O.D. dri l l col lars as listed below.:

(1) Tongs - Two. (2) sets of tongs wi th jaws for 4tt" D.P., 7-3/4" and 6" D.C.

1

Diamond M Century

Page 6

(2) Slips - Two (2) sets slips lor W D.P. Two (2) sets slips lor 7-3/4" D.C. Two (2) sets slips lor 6" D.C.

(3) Elevators - Two (2) sets lor 4H" D.P. One Cl) set lor 7-3/4" D.C. One (1) set lor 6" O.C.

(4) Salety Clamps - One (1) Varco type MP-R.

(5) Links - One (1) set B J . 500 Ton 3 V x 144" Links.

One (1) set B.3. 350 Ton 2-3/4" x 132" Links.

b. Spinning Wrench - Varco lor 5" Dr i l l Pipe

c. A i r Tuggers - Located on dri l l f loor.

8. Mud Faci l i t ies and Equipment

a. Mud Tanks

(1) Three (3) Act ive Mud Tanks • # Total Capacity 863 bbls.

(2) Two (2) Reserve Mud Tanks Total Capacity 654 bbls.

(3) One (1) Slugging Pit w/3et Gun Total Capacity 52 bbls.

(4) One (1) Tr ip Tank Total Capacity 30 bbls. >

b. cMud Mixing Pumps - Three:(3) Mission 5 x 6 centri lugal pumps wi th 75 HP electr ic motors. '

c. Shale sha ker - Hutchison-Hayes "Rhumba" 102 dual high speed. - -

d . Desander - Demco 86V wi th six (6) 8" cones.

e. Desander Pump - 5 x 6 centrilugal w i th 50 HP electric motor.

1. Desil ter - Demco 416H with 1 6 x 4 " cones.

g. Desi l ter Pump - 5 x 6 centnlugai wi th 50 HP electric motor.

h. Degasser - W e l l o Model 5200.

i . Mud Agitator- - Four (4) Lightnin Mixers.

j . P i t L ;vej indicator - Mart in Decker PVT system.

DRILLING UNIT - CENTURY

SPECIAL EQUIPMENT (Cont.)

SD-66 Schlumberger Ccnputer Unit Model 835 BJ Hughes Skid Unit

Both units installed 1982 as new

39600.00

WELL B SURF LOC OCS-G-6090 BRAZOS SLOCK A - I IB

A.C.&O 3250'

5750'

WELL A.C.&D SURF LOC OCS-G-6090 BRAZOS BLOCK A-118

co

BRAZOS BLOCK A-118 O C S - G - 6 0 9 0 TEX ACC PRODUCING INC LS

(5760 ACRES)

CO

in N-

NOTEt ALL COORDINATES ARE BASED ON TEXAS U4XBERT

PLANE COORDINATE SYSTEU. (SOUTH CENTRAL ZONE NAD 27).

23760.00

S U P P L E M E N T A L L A N O R E X P L O R A

PUBUC INFORMATION PLAT T I O N

j r .

V -XL* iuz cr t, h i tu '•• - i mi

TEXACO PRODUCING INC N E W O R L E A N S .

BRAZOS BLOCK A-l/3 OCS-G-6090

APPRO' £8 MILES SOUTHEAST OF VATACORDA. TEXAS

u u u u u • C & L ' Z

1000' 0' I OCC 2200' 1203. 11 WAA I I6B2D.P0* OAL

DRILLING MUD COMPONENTS

Common Chemical or

Chemical Trade Name

Aluminum Stearate "AKTAFLO-S" Barite Calcium Carbonate Calcium Chloride Calcium Oxide Calcium Sulfate Carboxymethyl Cellulose Caustic Potash Caustic Soda Chrome Lignite Chrome Lignosulfonate Drilling Detergent "E-Pal"

Ferrochrome Lignosulfonate

Gel

Gypsum

Lignite nosulfonate Sweep" -,cX"

andie-Trol" Sapp Soda Ash Sodium Bicarbonate Sodium Carboxymethyl Cellulose Sodium Chloride Sodium Chromate Starch

Description of Material

Aluminum Stearate Nonion.c Surfactant Barium Sulfate (BaS04) Aragonite (CaC03) Hydrophilite (Ca^) Lime ,Quick) Anhydrite (CaS04) Carboxymethyl Cellulose Potassium Hydrate Sodium Hydroxide (NaOH) Chrome Lignite Chrome Lignosulfonate Soap

Non-toxic, biodegradable defoamar Derived from wood pulp Sodium montmorillonite, bentonite,

attapulgite CaS04.2H20

Lignite Lignosulfonate Cement Pre-flush Hydrolyzed Cereal Solid Organo-aluminum complex Sodium Acid Pyrophosphate Sodium Carbonate NaHC03

Sodium Carboxymethyl Cellulose NaCL NaCr04.T i90 Corn :

MUD ADDITIVL.

Common Chemical Chemical Trad* fjj

"Black *agic"

"Black hagic Supermix"

Diesel

"Jelflake"

MICA

"Pipe-lax"

"Wall-Nut"

Wood Fibers

Description of Material

Oil base mud concentrate

Sacked concentrated oil base mud

Used to mix certain loss-circulation pills

Plastic foil, shredded cellophane

Loss-circulation material

Surfactant mixed with diesel

Ground wallnut shells

Loss-circulation material

TEMPORARY*

PROJECTED AIR EMISSIONS REPORT FEDERAL LEASES OCS-G 6090 BRAZOS BLOCK A-118 LOCATIONS B, C, D

EMISSIONS IN POUNDS PER DAY

SOURCE N0X CO YOC TSP so2

DRILLING EQUIPMENT2 283.8 61.4 22.7 20.3 18.9

OTHER SOURCES3 19.0 15. p UJI IA IA

TOTAL 302.8 76.4 33.7 22.3 20.9

EMISSIONS IN TONS PER YEAR

TEMPORARY1

SOURCE N0X CO VOC TSP so2

DRILLING FQJIPMENT2 26.4 5.7 2.1 1.9 1.8

OTHER SOURCE'S3 L& Li Ui JUL

TOTAL 28.2 7.1 3.1 2.1 2.0

Emission Exemptions for No , CO, VOC, TSP and S02 are calculated using the following formulas with a 81 stance from shore of 60 miles.

CQ Exemption (E) In TQHS P?rgyeart 2 / 3 m „ 1 1 6

E - 3400 x (distance from shore - 3400 (60) c<*

NO . VOC. TSP. S0r Exemption (E) In Tons per Year. E - 33:3 x distance fh>m shore - 33.3 (60) - 1998

tautt mm *jtor/ft. frja study, "Atmospheric Emisnons From Offshors 0»-

mm mm l»nr«Mt «i Production," EPA 450/3-77-026, June, 1977.

%*t*mt m «m*v«i factors fro* "Compilation of Air Pollutant emission

factan," Ifetri Edition EPA Report AP-42, August, 1977 (Tables 3.2.1-3,

3.2.1-4, 9.1-2). Included are helicopter landing and take off, two

trips/week; supply and/or crew boats, at dockside, 12 hrs./day, two

days/week; fuel storage and transfer; loading and unloading operations;

and Incineration of waste paper (average of 800 lb/mo) for duration of

project.