Post on 28-Oct-2020
OCS-G - 105 Lo
' *
I
Decenber 23, 1967
Texaco Inc. Attention: Mr. J . A. Newton Post Office Box 60252 New Orleans* Louisiana 70160
Gentlemen:
Reference fs nade to your Init ial Plan of Exploration and Environmental Report received Decenber 10* 1987, for Lease OCS-Q 7036, B'ock 204, Green Canyon Area. This plan Includes the ac ities proposed for Wells A, B, and C.
In accordance with 30 CFR 250.34, revised December 13, 1979, and our letter dated January 29, 1979, this plan 1s hereby determined to be conplete and 1s now being considered for approval.
Your plan control number 1s N-2869 and should b« referenced 1n your communication and correspondence concerning this plan.
Sincerely yours.
i
In Reply Refer Toi. Fp-2-1
fOrig. Sgd.) A. Donald Giroir
0. J . Bourgeois Regional apery 1 sor Field Operations
bcci Lease OCS-G 7036 (OPS-3-2) (FILE ROOM) /OPS-3— w/Public Info. Copy of the plan and ER (PUBLIC RECORDS)
MDJoseph seek 112/17/671 poecom
J A Newton Land Manager Southern Exploration Division
Taxaco USA PO Box 6d2S2 New Orleans LA 70160 504 595 1702
November 30 4 1987
Regional Supervisor F i e l d Operations Minerals Management Service 1201 Elmwood Park Blvd. New Orleans, Louis iana 70123-2394
261962 - FEDERAL LEASE OCS-G 7036 GREEK CANYON BLOCK 204 OFFSHORE LOUISIANA PLAN OF EXPLORATION AND ENVIRONMENTAL REPORT
Dear S i r :
I n accordance with the provisions of T i t l e 30 CFR 250.34-1, and your le t ter of January 29, 1979, and October 22, 1981, we hereby submit for your app 3val nine copies each of a Plan of Explorat ion with Environmental Report for the captioned lease. Should any addit ional information be required, please contact Mr. D. F . Cramer by telephone at (504) 595-1249.
Your ear ly approval of this plan w i l l be appreciated.
Yours very t r u l y ,
J . A . NEWTON Land Manager Southern Exploration Division
DFC
tdw POE/2
Attachments
TABLE OF CONTENTS r '
, PAGE
EXPLORATION/PLAN i
Description of and Schedule
for Exploration A c t i v i t i e s 1
Description of Rig and Safety Equipment
Geophysical Equipment 2
Location of Proposed Wells "* 2
Current Subsurface I n t e r p r e t a t i o n 2
Oil S p i l l Contingency Plan * 3
Onshore Support Bases 3
D r i l i i n g Mud Components and Mud Additives .... 4
Projected A i r Emissions Report , 4
D r i l l i n g Hazards Assessment 4
Archaeological Assessment 7
Lease S t i p u l a t i o n 7
Environmental Report and A i i Quality Review
Description of the Proposed Action 1
Description of the Affected
Environment and Impacts 3
Unavoidable Adverse Impacts 9
References 12
Coastal Zone Management Consistency C e r t i f i c a t i o n 13
Appendix
PLAN OF EXPLORATION TEXACO INC.
FEDERAL LEASE OCS-G 7036 GREEN CANYON BLOCK 204
NOVEMBER, 1987
PLAN OF EXPLORATION
TEXACO INC.
FEDERAL LEASE OCS-G 7036
GREEN CANYON BLCCK 204
Description of and Schedule for Exploration A c t i v i t i e s
Texaco Inc.'s e x p l o r a t i o n plan for Green Canyon Block 204
includes the d r i l l i n g and completion of three (3) exploratory
w e l l s . The f i r s t w e l l i s scheduled to commence on or about
February 1, 1988. The commencement dates for the remaining wells
have not been scheduled. Operations for the three (3) wells are
expected to l a s t approximately 293 days.
Description of Riq and Safety Equipment
Depending on the a v a i l a b i l i t y of r i g s , the propoaed wells w i l l be
d r i l l e d with a semi-submersible d r i l l i n g r i g s i m i l a r to the
"Penrod Rig No. 78." Included i n the Appendix are the r i g
specifications f o r the "Penrod Rig No. 78." The specifications
f o r the actual d r i l l i n g vessel and safety equipment to be used
w i l l be submitted along with the appli c a t i o n for permit to d r i l l .
The r i g used t o d r i l l the exploratory wells under t h i s plan w i l l
contain and maintain a d i v e r t e r system, Y lowout-preventers,
a u x i l i a r y equipment, and mud t e s t i n g ano monitoring equipment.
D r i l l i n g operations w i l l be conducted i n a manner so aa to
maximize p o l l u t i o n prevention i n accordance with OCS Order No. 7.
* »
A l l other safety and control equipment w i l l be used in accordance
with other applicable OCS Orders. r
1 i Should| a w e l l indicate the presence of commercial reserves, the
well w i l l be temporarily bandoned i n accordance with CX3
Order No. 3.
Geophysical Equipment
A l l geophysical work p r i o r to the commencement of exploratory
d r i l l i n g operations has been completed. No other geophysical
work i s presently planned for the lease. I f i t i s subsequently
determined that additional work i s required, conventional CDP
r e f l e c t i o n methods w i l l be used.
Location of Proposed Wells
Included i n the Appendix are the V i c i n i t y Map and Location Plat.
The V i c i n i t y Map shows the l o c a t i o n of Green Canyon Block 204
r e l a t i v e to the Louisiana shoreline. The Location Plat provides
the surface and bottom hole locations, proposed t o t a l depth for
each w e l l , and the water depth at each surface location.
Current Subsurface Geologic and Geophysical I n t e r p r e t a t i o n
Included in the Appendix are the subsurface structure map and
geologic cross section which r e f l e c t the current subsurface
i n t e r p r e t a t i o n of the geologic and geophysical data in the area.
These data are considered c o n f i d e n t i a l by Texaco Inc. and should
be exempt from disclosure under the Freedom of Information Act 5
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U.ScC. '552. These data are intended for use by. authorized
Minerals! Management Service personnel only. r
' I O i l Spil/1 Contingency Plan
I n accordance w i t h OCS Order No. 7, Texaco Inc. has on f i l e with
the Minerals Management Service an O i l S p i l l Contingency Plan
which has been approved by the Minerals Management Service by
l e t t e r of September 24, 1987.
Texaco Inc. i s a member of Clean Gulf Associates (CGA) and, as
such, has access to a stock-pile of o i l s p i l l containment and
c)ean-up materials use in the offshore and estuarine areas.
There are several v. bases which are s t r a t e g i c a l l y located along
the Texas, Louisiana and Florida coastlines of the Gulf of Mexico
t h a t have the personnel, material and equipment necessary to
c o n t r o l and clean up o i l s p i l l s . The closest CGA base at Grand
I s l e , Louisiana, i s within 106 miles of the proposed d r i l l s i t e s .
Based on the distance from t h i s CGA i n s t a l l a t i o n to the proposed
d r i l l s i t e s , we estimate a t r a v e l and deployment time of approxi
mately twelve (12) hours.
Onshore Support Bases
Two onshore bases w i l l be used to support the proposed opera
t i o n s ; one in Venice, Louisiana and the Texaco dock at Morgan
C i t y , Louisiana. From these bases personnel, supplies and ma
t e r i a l s w i l l be transported by boat t c the proposed d r i l l s i t e s .
A d d i t i o n a l l y , personnel may be transported to and. from the d r i l l
s ites 'by hel i c o p t e r s which are based at Petroleum Helicopter,
Inc.'s f a c i l i t i e s at Amelia, Louisiana and Morgan C i t y ,
Louisiana 1. /
D r i l l i n q Mud Components and Mud Additives
Included i n the Appendix are l i s t i n g s of the d r i l l i n g mud com
ponents and roud additives which are normally usecl during d r i l l i n g
operations.
Projected A i r Emissions Report
The projected a i r emissions re p o r t , which i s included in the
Appendix, r e f l e c t s the estimated emissions of t o t a l suspended
pa r t i c l e s (TSP), sulf u r dioxide (S0 2), nitrogen oxides (N0 X) ,
carbon monoxide (CO) and v o l a t i l e organic compounds (VOC) for a
293 day period of continuous operations. Upon comparison of the
estimated emissions to the emissions calculated using the exemp
t i o n formulas, i t was determined that the proposed exploration
a c t i v i t i e s were exempt from f u r t h e r a i r q u a l i t y review. Based on
these data, i t has been determined that these planned a c t i v i t i e s
w i l l not cause any s i g n i f i c a n t e f f e c t on the a i r q u a l i t y of the
onshore areas.
D r i l l i n g Hazards and Archaeoloqical Assessment
An archaeological hazards survey was conducted over Green Canyon
Block 204. The data collected from t h i s survey included
magnetometer, side scan sonar, sparker and pi.nger p r o f i l e s .
THese survey data along with available CDP seismic and velocity
p r o f i l e s were reviewed to evaluate the following proposed d r i l l
s i tes- fojr potential d r i l l i n g hazards. i
Location "A" § 7400' PNL & 800' FEL of GC Blk. 204;
Location "B" § 2450' FNL & 4750' FEL of GC Blk. 204; and
Location "C" § 5800' FSL & 7900' FEL of GC Blk. 204.
At Location "A" the water depth is 2700 feet. The seafloor is
smooth and slopes to the northwest at an approximate rate of 320
feet per mile. Near surface bedding is undetermined at this
time.
Evidence of near surface faulting is observed near the well site.
The nearest fault i s 900 feet from the location and is down to
the southwest. The well bore will intersect shall faulting at
approximately -3700 feet. Shallow "bright spots" are observed at
depths of approximately -4450 feet.
Another indication of shall hazards is that the subbottom i s in a
state of general gas saturation. CDP velocity data indicates an
interval velocity decrease at 2.175 seconds, possibly indicating
top of abnormal pressure at -5750 feet.
The wells on Green Canyon Blocks 116 and 117 encountered abnormal
pressure at 7000 feet and 7012 feet, respectively. Care will be
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taken whife d r i l l i n g through tne shallow "bright, spot" at -4450
feet : i j
1 . >
At Locatioi/ "B" the water depth i s 2862 feet. The seafloor is i
smooth and slopes to the west at an approximate rate of 106 feet
per mile. Near surface bedding is undetermined at this time.
Evidence of near surface faulting is observed near tbe well s i t e .
The nearest f a u l t is 1300 feet from the location and is down to
the southwest. The well bore w i l l intersect ohall faulting at
approximately -5850 feet. Shallow "bright spots" are observed at
depths of approximately -4210 feet.
Another indication of shall hazards is that the subbottom is in a
state of general gas saturation. CDP velocity data indicates an
inte r v a l velocity decrease at 2.30 seconds, possibly indicating
top of abnormal pressure at -6150 feet.
The wells on Green Canyon Blocks 116 and 117 encountered abnormal
pressure at 7000 feet and 7012 feet, respectively. Care w i l l be
taken while d r i l l i n g through the shallow "bright spot" at -421C
feet.
At Location "C" the water depth i s 2890 feet. The seafloor is
smooth and slopes to the northwest at an approximate rate cf 176
feet per mile. Near surface bedding is undetermined at this
t ime.
Evidence of ifear surface f a u l t i n g i s observed near the well s i t e .
The nearest f a u l t i s 1900 feet from the location and i s down to r
the northeast. The well bore w i l l intersect shall f a u l t i n g at
I approximately /-3790 feet. Shallow "bright spots" are served in
< t h e v i c i n i t y o f t h e proposed l o c a t i o n .
Another i n d i c a t i o n o f s h a l l i . r ^ s t h a t the subbottom i s i n a
s t a t e of g e n e r a l gar s a t u r a t i o n . CDP v e l o c i t y data i n d i c a t e s an
i n t e r v a l v e l o c i t y decrease a t 1.90 seconds, p o s s i b l y i n d i c a t i n g
t o p o f abnormal p ressure at -4925 f e e t .
The w e l l s on Green Canyon Blocks 116 and 117 encountered abnormal
p ressure at 7000 f e e t and 7012 f e e t , r e s p e c t i v e l y . Care w i l l be
t e k e n w h i l e d r i l l i n g th rough the sha l low " b r i g h t spot" a t -3790
f e e t .
A r Taeoloqi *>ssessme i t
There are no known a r c h a e o l o g i c a l or c u l t u r a l resources l oca t ed
on Green Canycn Block 204. The p r o b a b i l i t y o f oec- ?nce a..'J r e
cove ry of an a r c h a e o l o g i c a l r e source at the proposed d r i l l s ices
i s minuscule .
Lease S t i p u l a t i o n
Texaco I n c . w i l l comply w i t h t he p r o v i s i o n s o f Lease S t i p u l a t i o n
No. 3 - M i l i t a r y Warning Area .
DF~:tdw POE/3 11/17/87
7
I
ENV!RONMIINTAL RFPORT
ANO
AIR QUALI I V REVIEW
FOR COASTAL MANAGEMENT CONSISTENCY OU' iNATION
BY THE STATE OF LOUIS ANA ON OPERATION?
PROPOSED IN THE PLAN OF , Vpj.OF ' TION FOR
GULF OF MEXICO L?A ,CS-G 7036
GREEN CANYON BLOCK 204
OCTOBER 1987
Prepared b y :
Vincent F. Cotton*. P.E.
Texaco Inc .
Post Off ice Box 60252
New Or leans, LA 70i&0
OQ4) 595-1471
* DESCRIPTION OF PROPOSED ACTION
i
Tha~ report addressee fha activities proposed by Texaco Inc. for
Grson Cajiyon Block 04 ;cv»--G 703c*/. The approximate location of
the proposed activity is presenter1 J.a Figure 1. a general
vicinity map ol Outer Continental : heli (OCS; le iaa areas os.£
the cosir of LouisAana.
I t antic-paced tnat a rem: ~»nbmerrible r t j v * l l be movad on
the lease .. 1 Lhr»*e '.3) ex *JLO*t '-.>ry wells will be drilled The
surface lo-at-rms :>t the wells and .'dditional information regard
ing specific act j. vities prcr-jjHF.d by Texaco Cor this block are
included in the PJ-n of Explori.'wion to which *->is reperc is
attached.
The proposed activitiee will be carried out by Texaco Inc. vith a
guarantee of *:ht following
1. The best available ».\ i rafest tec; ^logies will be utilized
throughout the project This deludes meeci: uJ applicable
requirements for equipment types, general project layout,
safet: syjtvw.li, equipment and mot*i*:o ing H\ atftjns.
Dr;WNG NOT TO SCALE
2. Ai l operations w i l l be covered by a Minerals Management i
i
Service (MMS) approved Oil S p i l l Contingency Plan.
3. All/ applicable Pectoral, Stata, and local requirements regard
ing a i r emissions, wcter qualit\ , and discharge for the
propcsed a c t i v i t i e s , as well as any ov ies permit conditions,
vxl 7 be ~ )aplit*d vith.
A. Travel Modea, Routes, and Frequencies
In addition to the d r i l l i n g rig, service bo&ts and helicopters
w i l l be used x.o transport equipment, material, personnel, ar/i
supplifb to the d r i l l s i t e . Texaco exp-tcts to operate '-he
service boat?: *ut of support base f a c i i i t i *£ in Morgan City and
Venice, Louisiana. I t i s estimated that the tervice boats w i l l
make three (3) to four (4) trip s each week. Helicopter f l i g h t s
to Green Canyon Block 204 w i l l average two (2) trips per week ani
w i l l originate fro-a and return too Petroleum Helicopters, Inc.'s
f a c i l i t i e s at Amelia or Venice Louisiana.
I t ib anticipated that the transportation vessels w i l l u t l l i r e
the most direct routes from their points of origin. However*,
because a vassal supporting the proposed exploration a c t i v i t i e s
may be schedule-o 'or other stops in the area the exact route for
each vessel on each particular t r i p cannot re predetermined.
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B • Support Facilities an-' <ew Personnel
i
r
The proposed a c t i v i t i e s ,will use "wo 2) exist ing support bases,
rhe Texacoj dock at , Venice, Louisiana, and the Texaco dock at
Morgan City, Louisiana. The proposed a c t i v i t i e s w i l l not require
any expansion to these f a c i l i t i e s . Also, a l l proposed a c t i v i t i e s
w i l l be accomplished using existing employees and contract
personnel; therefore, no new en;.I oyment i s expected to be
generated as a r e s u l t of these a c t i v l ci-fs.
C New Support f'acil.ties
The pr posed exploration a c t i v i t i e s v i i i not require any new
support f a c i l i t i e s .
D. New or Unusual Technology
No new techniques or unusual technology w i l l be used.
E . Location of the Proposed Activities
The OVeen Canyon Area exploration a c t i v i t y i > located
approximately eighty-seven (87) miles ^outh of tho Louisiana
c >4-st a Timbalier Island. Figure 1 shows the locati o n of Block
2C^i i n r e l a t i o n t o the Gulf coast, as we l l as the geographic-
r e l a t i o n s h i p between Green Canyon Block 204 and the other OCS
leas.* areas.
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» DESCRIPTION OF THE AFFECTED ENVIRONMENT AND IMPACTS
Commercial Fishing
Green Canyon Block 204 i s located approximately 87 miles from
shore where the water depth i s approximately 3000 feet. This
location beyond the outer l i m i t s of the principal f i n f i s h and
shell fishing areas (U.S.D.I., FEIS, Gulf of Mexico, 1986,
Visual No. 2 ) . The placement of a d r i l l i n g r i g on Block 204
w i l l remove a portion of the waters from use by commercial
fisheries. Additionally, the waters adjacent to the d r i l l
sites may become temporarily turbid due to d r i l l i n g
operations. These operations should have no significant
impact on commercial fisheries.
Green Canyon Block 204 i s clear of a l l designated ahipping
fairways and anchorage areas. The nearest fairway i s located
approximately 13 miles to the north (U.S.D.I., FEIS, Gulf of
Mexico, 1986, Visual No. 3). I t i s l i k e l y that marine ves
sels supporting the a c t i v i t i e s proposed in Green Canyon Block
204 will u t i l i z e this shipping fairway to gain access to the
support bases. However, i t i s unlikely that the marine ves
sels w i l l have a significant effect on fairway t r i n f i c . A l l
Shipping
i
marine vessel operations w i l l be i n accordance w i t h the U.S.
, coast Guard's regulations regarding navigation standards and j
the d r i l l i n g r i g and each marine vessel w i l l be equipped w i t h
a l l ujs Coast Guard required navigational saiety aids.
3. Small Craft Pleasure Boating, Sport Fishing and Recreation
The a c t i v i t i e s proposed i n the accompanying Plan of Explora
t i o n are p r i m a r i l y confined to Green Canyon Block 204, which
is located approximately 87 miles from the Louisiana coast
and has a water depth of approximately 3000 feet. Since
Block 204 i s so far removed from shore, very l i t t l e pleasure
boating or sport f i s h i n g w i l l take place i n the area. Addi
t i o n a l l y , the water depth precludes most recreational
a c t i v i t i e s such as sport diving. No adverse impacts on
pleasure boating, sport f i s h i n g or recreation are anticipated
as a r e s u l t of these proposed a c t i v i t i e s .
4. Cultural Resources
There are no known c u l t u r a l resources located i n Block 204.
Visual No. 4 from the F i n a l Environmental Impact Statement
(FEIS) (U.S.D.I., 1986) indicates Green Canyon Block 204 i s
located w e l l outside the U.S.D.I. designated h i s t o r i c and
pr e h i s t o r i c c u l t u r a l resources high p r o b a b i l i t y l i n e s . Also,
the geohazards survey conducted on Block 204 indicates no
cu l t u r a l resources were detected. Therefore, no impact on
cu l t u r a l resources i s expected.
5
5. Eco\>gically Sensit ive Features
• Ther^ are.no known e c o l o g i c a l l y sensitive features located on r
Green Canyon Block, 204 (U.S.D.I., FEIS, Gulf of Mexico, 1986,
Visual No. 3).. The nearest sensitive feature i s the Diaphus
Bank located approximately twenty-two (22) miles to the
west-northwest of Block 204. The proposed operations should
have no impact on t h i s feature.
The onshore support bases w i l l necessitate the passage of
marine vessels and h e l i c o p t e r t r a f f i c . These operations w i l l
have only minimal impact on the Louisiana shoreline.
6. Existing Pipelines and Cables
There i s no evidence of any cables or pipelines being located
. n Green Canyon Block 204.
7. Other Mineral Uses
The a c t i v i t i e s proposed f o r Green Canyon Block 204 w i l l have
no impact on other mineral uses.
8. Ocean Dumping
The major sources of ocean dumping related t c OCS hydrocarbon
exploration a c t i v i t i e s are d r i l l i n g muds and d r i l l c u t t i n g s .
D r i l l c u t t i n g s are brought to the surface by the d r i l l i n g
mud. These c u t t i n g s are separated and disposed of overboard.
After the exploratory d r i l l i n g i n Green Canyon Block 204 i s
- 6 -
complet .id, Texaco anticipates dumping i t s excess water-based
d r i l l i n g ' f l u i d (estimate 1000 bbls.). I f any oil-based mud
is used, i t w i l l be transported to shore for proper disposal.
Treated /domestic waste, d r i l l water, and kitchen and other
wastes w i l l also be disposed of at the proposed d r i l l s i t e .
There w i l l be no intentional discharge of any oily or hazard
ous materials in violation of MAS or KPA regulations.
9. Endangered or Threatened Species
Federally l i s t e d endangered or threatened species which might
occur in the Green Canyon Area are the f i n whale, humpback
whale, right whale, sei whale, sperm whale, Kemp's ridley
turtle, green turtle, hawksbill turtle, leatherback turtle,
and loggerhead turtle (U.S.D.I., FEIS, Gulf of Mexico 1986,
pp 111-32) . Of the whale species, the sperm whale i s perhaps
the most common in the Gulf of Mexico. Generally, these
whales inhabit the waters of the continental slope and the
deep oceanic waters. The other species of whales may be con
sidered uncommon in the Gulf. The leatherback turtle i s
believed to prefer the deeper oceanic waters while the other
species may be considered more coastal in nature. However,
i t i s possible that any of these turtle species may occur in
the project area at one time or another. L i t t l e or no impact
i s expected to any of these threatened or endangered species
by the proposed a c t i v i t i e s .
7
Federally l i s t e d endangered or threatened species expected to
occur jin the v i c i n i t y of the onshore bases are the bald r
eagle and brown pelican (U.S.D.I., FEIS, Gulf of Mexico,
1986-, (Visual No, 2). Also, the American alligator, which
occurs generally throughout the Gulf coast, is listed in
Louisiana as "threatened by similarity of appearance". The
bald eagle inhabits the area from Morgan City, Louisiana east
and north to the Mississippi River. The brown pelican inhab
its the Barataria Bay area west of Venice, Louisiana. No
federally listed endangered plant species are known to occur
in the Louisiana coastal area.
The FEIS for lease sales 110 and 112 (U.S.D.I., 1986) dis
cusses the occurrence and impact on endangered or threatened
species. The impacts discussed are primarily based on the
occurrence of oil s p i l l s . The impacts on various endangered
and threatened species wil l depend on the nature of the
spill, weather conditions, proximity of the s p i l l to the
species, tolerance of the species for o i l , and the response
time and effectiveness of the sp i l l cleanup and containment
services. Given these variables, the impact on the various
endangered or threatened species will vary from no effect to
serious.
- 8 -
The* experience of o i l and gas exploration in the Gulf of
' Mexico indicates that there i s a small probability of
occurrence of an, o i l s p i l l . The probability remains low
because of tne level of technology used by the industry to
insure safe and responsible operations. Texaco Inc., as a
prudent operator, w i l l take the necessary measures to reduce
the probability of o i l s p i l l s . Towards this, Texaco w i l l
comply with OCS Order No. 7 on pollution prevention and con
trol, and has an approved O i l S p i l l Contingency Plan on f i l e
with the MMS. I t i s unlikely that the offshore or onshore
acti v i t i e s related to the Green Canyon Area exploratory
dr i l l i n g a c t i v i t i e s w i l l have any effect on the federally
listed endangered or threatened species.
In accordance with MMS guidelines, the i n i t i a l OCS Socio-Economic
Data Base Report for the support base f a c i l i t i e s u t i l i z e d by
Texaco Inc. w i l l be prepared for submission pursuant to the spe
c i f i c parameters to be established by the MMS at a later date.
B. Socio-Economic Data
UNAVOIDABLE ADVERSE IMPACTS
The greatest threat to the environment would be caused by an o i l
s p i l l or well blowout. These occurrences can be reduced in
number by u t i l i z i n g trained personnel, adequate operational safe-
a * * " " " " ™ ill • e w e ^ ^ M e ^ a ^ e M ... . , • " — ^ ™ . II
guards, a-.d employing available safety and pollution control
systems. These .measures are standard operating procedure for 5 r
Texaco Inc. (
The unavoidable adverse impacts that w i l l occur as a r e s u l t of
th e proposed exploratory d r i l l i n g w i l l be few i n number and
temporary i n nature. The primary adverse impacts are a lo c a l i z e d
degradation of water and a i r q u a l i t y i n the v i c i n i t y of the
d r i l l i n g s i t e , the p o t e n t i a l obstruction to commercial and
recr e a t i o n a l f i s h i n g vessels, and the d i s r u p t i o n and/or k i l l i n g
o f benthic and/or pelagic org*, .isms during the location of the
d r i l l i n g r i g and dur i i - che disposal of muds, cuttings, domestic
wastes, and t r e a t e d sewage.
The discharge o f d r i l l c u t t i n g s and water-based muds w i l l r e s u l t
i n an increase i n water t u r b i d i t y , b u r i a l of benthic organisms,
and possible t o x i c e f f e c t on marine organisms i n the immediate
v i c i n i t y of the d r i l l i n g r i g . A reduction i n photosynthetic
a c t i v i t y and plankton population can also be expected as a r e s u l t
o f discharging. However, i t i s expected that the pelagic and
benthi c organisms w i l l repopulate the area r a p i d l y a f t e r d i s
charges end.
The proposed a c t i v i t i e s w i l l generate a small amount of a i r p o l
l u t a n t s due to the emissions from the diesel engines; therefore,
some d e t e r i o r a t i o n i n a i r q u a l i t y of the OCS operation area i s
expected. Trese c-ittissions a f f e c t only **Jie immediate exploration
a c t i v i t y s i t e and are r a p i d l y distvpatea Ly the atmosphere. A
Projected^ A i r Emissions Report has t - e n prepared f o r the proposed
a c t i v i t i e s anc* i s included i n t l i e appendix to the L--*r. of Explor-i
ation t i which t h i s Environmental Report i s -* p a r t .
Commercial and recreational f i s h i n g cculd affected by th'? pro
posed a c t i v i t i e s , mainly i n rarnrj of *nterference. Although the
unavoidable adverse impacts could include some smothering of
s h e l l f i s h , reduction of the area presently available f o r unre
s t r i c t e d f i s h i n g , and minimal f i n f . I s h k i l l i n g , f i s h i n g a c t i v i t i e s
would not be s i g n i f i c a n t l y affected.
x l -
R P F E R EN CES
United States Department of the I n t e r i o r , Minerals Management
Service, F i n a l Environmental Impact Statement, Gulf of
Mexico, December 1983.
2. United States Department of the I n t e r i o r , Minerals Managment
Service, F i n a l Environmental Impact Statement, Gulf of
Mexico, December 1984.
3. United States Department of the Interior, **:.\orals Management
Service, Final Environmental Impact ,:l Jtement, Gulf of
Mexico, November 1 J
4. United Statec Department of the I n t e r i o r , Minerals Manageraent
Service, I i n a l Environmental Impact Statement, Culf of
Mexico, November 1986.
VFC (das) sh 0RC/E1Q? 102287
- 12
r COASTAL ZONE MANAGEMENT C NSISTE^CY CERTIFICATION
Exploration Type of Plan
Green Canyon Block 2G4 Area and Block
OCS-G 7036 Lease Number
The proposed activities described in detail in this Plan comply with Louisiana's approved Coastal Zone Management Program and w i l l b«s conducted in a manner consistent with such Program.
Arrangements have been made with the States-Item in Baton Rouge, Louisiana, to publish notice of the proposed activities no later than sfpf^rf V, t t t t •
Texaco Inc. Lessee or Operator
ertifying Official
g6 In Date
APPENDIX
• II — i
Rig Specif ications for "Penrod Rig No. 78"
Vic in i ty Map
Tjocation Plat
Subsurface Structure Map
Geologic Cross Sections
Drilling Mud Components
Mud Additives
Projected Air Emissions Report
PENROD 78 INVENTORY ic SPECIFICATIONS i
» COLUMN STABILIZED. SEMI-SUBMERSIBLE VESSEL 1 i
Description The rig is of the catamaran type with two pontoons and six' columns. A combination of box girders, columns, and stay support the upper hull which itself is a box girder and contains machinery, storage and living spaces. 4 x 2000 HP azimuthing thrusters are in pontoons for mooring assist.
Dimensions
Length overall 102.00 m. 334.3 f eet
Width overall 70.2 m. 230.3 feet
Height from B.L. to main deck 43.0 m. 141.08 feet
Length of pontoons 102.00 m. 334.5 feet
Breadth of pontoons 16.2 m. 53.15 feet
Height of pontoons 7.6 m. 24.93 feet
Diameter of columns:
Corner I l . l m. 36.42 feet
Center 11.0 m. 36.09 feet
Length ot main oeck 77.0 m. • ' i f eet
Brepdth of main deck 65,C m. 2x3.25 feet
Operating draft 21.03 m. 70 ; eet
Transit draft 7.33 m. 24.05 feet
Air Gap 15.2 m. 49.87 feet
Displacement (operating draft) 33,400 L.T.
Displacement (transit draft) 22,383 L.T.
Water Depth Capacity 3000 feet
PENROD 78 INVENTORY, PAGE 1
Speed f
Normal transit speed in calm weather, smooth sea and water temperature not less than 15 degrees C, 100% MCR shail be 7 knots.
Supplies
Item
Accommodation Plperack Riser rack Sack mud & cement Bulk mud Bulk cement Liquid mud
Total .variable drill load Fuel oU Drill/fresh water Mooring load
Total
Capacity Spec. Weight
90 persons 307 m2 352 m2 320 m2 170 m3 170 m3 334 m3 (2100 bbls)
2.44 t/m2 1.22 t/m2 3.17 t/m2 2.5 t/m3 1.5 t/m3 2.4 t/m3
20 ppg
Max. Weight
1237 t. 429 t. 1014 t. 425 t. 255 t. 800 t.
2200 t. with II* CM. 1645 t. 1855 t. 775 t.
6475 t.
Rules and Regulations
The platform shall be designed and built in accordance with the rules of:
a. American Bureau of Shipping +A1, Column Stabilized.
b. United States Co'*st Guard MOD'J.
c. United Kingdom D.E.N. and D.O.T.
PENROD 78 INVENTORY, PACE 2
PENROD 78 INVENTORY
DRAWWORKS: ,
National l$25-pE Drawworks with sandline drum, emergency rotary drive and a PARMAC V-293 hydromatic brake. Drawworks driven by two EMD D-79 electric motors rated at 2000 hoisting HP.
POWER
Four EMD 16-643E9B diesel engines. Each is rated at 3320 continuous HP and drives a 2100 KW 60 volt AC generator.
Eight Intergrated Power Systems Corp., Model 2200M SCR units are used to supply DC power for drilling and mooring functions.
MUD PUMPS:
Two National Model 12P-160 Triplex mud pumps. Each pump independently driven by two EMD D-79 electric motors rated at 1600 HP and supercharged by an electric driven 6" x 3M centrifugal pump.
DERRICK AND ACCESSORIES:
Derrick Services International, Inc. 165* high x 40' wide base beam leg derrick with static hook load capacity of 1,300,000 lbs. wirh 14 lines strung to traveling biock. The derrick has the foUowing dynamic capacities:
1« With 300,000 lbs, of pipe racked in derrick (tripping) (a) 14 degree roll in 8 second period (b) 14 degree pitch in 8 second period (c) 20 feet total amplitude heave in 8 second period (d) 73 knot wind
Derrick Service International, Inc. Crown Block with rsht 60" • iamet sheaves grooved for l%" diameter wire line* Adjustable casing stabbing piatform.
RISER TENSIONERS:
Eight NL R.J; Equipment Extended Life Model, 80,000 lb. capacity units.
GUIDELINE TENSIONERS:
Four NL Rig Equipment, 16,000 lb, capacity units.
PENROD 78 INVENTORY, PAGE 3
TV LINE TENSIONERS: • 1 _
Two NL Rig Equipment, 16,000 ib. capacity units.
BOP HANDLING IYSTEM: i
One A-S Normar hydraulic BOP Carrier system with skid unit, auxiliary trolley and power unit. Capacity 200 tons.
TRAVEUNG BLOCK:
National Type 760H650 Traveling Block with 7 sheaves 60" diameter for IW* wire line 650 ton Capacity.
HOOK:
National Type H-650, 650 ton capacity.
SWIVEL:
National Type P-650, 650 ton capacity
DRILL STRING MOTION COMPENSATOR:
NL Rig Equipment Model 25/600 drill string compensator, 25 feet stroke and 600,000 pound compensating capacity.
ROTARY EQUIPMENT:
National Type C-495 rotary with kSYx table opening independently driven by an EMD D-79 electric motor through a National two speed transmission. Varco type MPCH drive bushing. Varco Type 27-HDP Kelly bushing with wiper assembly.
MUD MIXING:
Tv/o 6" x 51' ccntril igal mud miring pumps. Each p«*rrr> driven by a 100 HP AC eectric motor.
MUD SYSTEM:
950 bbl. active mud tanks, 500 bbl reserve mud storage, 330 bbL mud and cement water pre-mix and 60 bbl. capacity slug tank. All active and reserve mud tanks equipped with
PENROD 78 INVENTORY, PAGE 4
Brandt mud agitators. Desander unit with three 10" cones to IioHdle 1500 GPM. Desilter unit with sixteen 5 n cones to handle 1280 GPM. Two Br.->nd* dual screen shale shakers.
11,200* of 5" 0.b. 19.50*/ft. Grade E, Range 2 drill pipe with 6-3/*" O.D. 5" XH T J . 5,900* of 5" O.D. 19.50#/ft Grade G, Range 2 drill pipe with 6-3/8" O.D. 3" XH T J . 36-a" CD. x 2-13/16" I.D. drill collars 31' long with 6-5/8" API Reg. connection. 3 - Kelly saver subs 5" XH box and pin 2 - Cross over subs 5" XH box by ft" IF pin 2 - Ci oss over subs 5" XH box x 6-5/8" API reg. pin 2 - Cross over subs ft" IF box by 6-5/8" API pin 2 - Bit subs 6-5/8" API reg. box by 6-5/8" API reg. box bored for float 2 - Bit subs ft" IF box by ftft" API reg. box bored for float 30 - 6h" O.D. x 2)4" I.D. spiraled drill collar 31' long with ft" IF connections ft5 - Joints 5" heavy weight drill pipe with ftft" IF connections 2 - Bit ubs 6-5/8" API reg. box by 7->/8" API reg. box bored for float 2 - Bit subs ft" IF box by 6-5/8" API reg. box bored for float 2 - Kelly 5K" HEX by 3K" bore by 5ft feet long with 5" XH pin 1 - (Pair) Byron Jackson type DB rotary tongs 3ft" to 17" range 1 - (Set) VARCO 2-3/ft" x 132" 350 ton links 2 - Bry on Jackson type GG 350 ton 5" drill pipe elevators 2 - VARCO type SDXL 5" driL pipe slips 1 - VARCO type DCS-L 6-3/ft" - 8" drill collar slips 1 - VARCO type DCS-R 5ft" - 7 - collar slips 2 - VARCO type MP-R ftft" - 1G/2 saiety clamps
BLOWOUT PREVENTERS, RISER SYSTEM. DIVERTER SYSTEM. BLOWOUT PREVENTER. PREVENTER CONTROL SYSTEM AND CHOKE
The stack is 18-3/ft" - 10,000 psi W.P. Cameron type "U" II double .preventer*, 18-3/ft" 5,000 psl, W.P. Cameron type "D" annular blowout preventers. Starting at the wellhead and going up, the stack will have a National 18-3/ft" - 10,000 psi W.P. autolock straight connector; Cameron type "U" II 18-3/ft" - 10,000 psi, W.P. double with 5" pipe rams in top and bottom; Cameron type "U" II 18-3/ft" - 10,000 psi W.P. double with blind shear rams in top and 5" pipe rams in bottom; Cameron 18-3/ft" - 5000 psi W.P. type "D" annular blowout preventer; Cameron 18-3/ft" - 10,000 psi W.P. collect connector; Cameron 18-3/ft" - 5000 psi W.P. Type "D" annular blowout preventer; 18-3/ft" nominal Cameron flex joint with Cameron 21" "RD" box connector. There are 1ft fifteen gallon, 3,000 psi W.P. separator type accumulator bottles mounted on the stack. The stack mounted choke and kill valves are Cameron type "F" gate double 90 degree block tee, with 3-1/8" - 10,000 psi W.P. BX-15ft clamp hub inlet and outlet, with two type "DF" 30000 operators.
The riser is 20" O.D. x ft" wall X-65 pipe with Cameron connectors and integral kill and choke lines. 3000 feet total, as follows:
Sixty 50' joints with bouyancy modules. Two each 20' and 10* joints. The slip joint has a 60' stroke.
PENROD 78 INVENTORY, PAGE 5
» I
'Regan type KFDS Diverter with the following components: 1
Support housing permanetly mounted under the ft9fc rotary table, KFD diverter nominal 20" with ten inch bore insert packer, flow. Une spacer spool with two hydraulic actuated seals and a type DR-1 support bail J
Blowout preventer control is a Koomey Hydraulic Sub-Sea B.O.P. Control system with the following components: Master electric drillers control panel Model EX32G6R, Model EW21GM electric remote control panel, Model SSA-300-11S Koomey accumulator unit with 300 gallon mixed f'-ud reservoir, 100 gallon soluble oil reservoir, 100 gallon Welkic reservoir, three Model I 7A36 air powered pumps, two Model UET6GB electric driven triplex pump, Model UP3. *24EPR Hydraulic Control Manifold, 109 eleven gallon, 3000 psi, W.P. separator type accumulator pottles, two Model RHSP-50 retrevable hydraulic control pods, two hose reels with 35Cw of control hose and diverter control panel.
Th* choke manifold is 3-1 /16" - 10,000 W.P. having two H-2 adjustable chokes and two hydraulic operated Cameron adjustable chokes.
SPECIAL EQUIPMENT:
1. Mud-Gas separator 2. Drilling Recorder-Geolograph Model Drill Sentry six pen. 3. Dual mud lines complete with dual standpipes and 3" x 75" - 10,000 psi test rotary
hoses. 4. SWACO horizontal style degasser. 5. Halliburton twin HT-400 rement unit driven by two EMD D-79 DC electric motors. 6. V/ RCO Model 6600 Power sub. 7. Totco Pitometer system mud volume totalizer with recorder. 2. Totco pump stroke-trip flow counter system. 9. One MAXIM Model RO-100 water distillation unit, 10,000 gallons per day. 10. Two 400 amp welding machines and oxygen-acetylene equipment. 11. Mathey ••Surveyor" wireline unit with 25,000* of .092" line. 12. Three sets of 350 ton casing tools for running 13-3/8", 9-5/8" & 7" casing. 13. OMSCO 6-5/8", 15,000 psi test Kelly valve (upper). 14. Two OMSCO 10,000 psi test Kelly valves (lower). 15. Two Gray inside BOP. 16. Drilco E-Z torque hydraulic cathead. 17. Fork lift truck for sack mud storage room. IS. One pair Baash-Ross type A AX tongs for 20" and 30" casing. 19. Baash-Ross type H-200 side door elevators for 20" casing. 20. One Lamb Model 16000 hydraulic casing tong for 13-3/8", 9-5/8" and 7" casing. 21. One Totco operating unit 0-8° and 0-16°. 22. Overshots and Taper taps for contractor furnished drill string. 23. One OMSCO 10,000 psi test drill pipe safety valve. 2ft. Totco type 100 weight indicator with tong torque gauge, pump pressure gauge,
rotary RPM indicator and pump strokes indicators. 25. Houston Engineers partially balanced driiiing bumper jars two 8" and two 6K". 26. Baash-Ross type H-i 50 side door casing elevator for 30" casing. 27. 23 Beebe Bros, air tuggers in various sizes for use on rig floor, guidelines, BOP
storage area and main deck area.
PENROD 78 INVENTORY, »AGE 6
28. "i wo 490 CFM at 125 psi air compressors, one air dryer and one bulk compressor with air rec J
29. V.M.W. tyill String Racking Arm on drill floor - Mcdel RJT-33C. 30. VARCO type CB casing bushings for 20" OD and 30" OD casing. 31. VARCO tVpe CMS-XL casing slip for 30" OD casing. 32. Spinnerhawk Model 13,000 329 drill pipe spinner. 33. Diesel engine driven 550 KW emergency AC generator. « 34. Two Red Fox Model Fox-Pac FP-l500 sewage treatment plants. 35. Two Clayton steam generators Model EO-200-1 •
COMMUNICATIONS EQUIPMENT:
One HARRIS Model RF 230M(AC) single side band 125 wan radio with 1,000 watt linear amplifier. Two Sailor Model RT 1144AC VHF/FM Marine transceiver. Radio room clock with silence periods marked. VHF/AM transmitter/receiver for helipcopter operations - NARCO Model 120/TR-1000B. Helicopter homing beacon - Southern Avionics model SS-1000A. ACR Model RLB-14 (D.P.I.R.B.) Emergency Position Industry Radio Beacon. Two Lifeboat Radio's - ITT Mackay Model 403A Six Standard Communications Model 83DS-5QB Marine VHF-FM Portable (Hand Held) Transceivers.
MOORING SYSTEM:
Skagit 8 point wire/chain combination mooring system consisting of 4 Skagit Model ETW-350/48 DBL winch/windlasses, each one equipped with 2 Eaton 336 water cooled Disc brakes and 2 air cooled 128 inch band brakes. Brake holding capacity is 1100 kips per anchor. Winch pulling capacity is 500 kips.
Each wire is 3ft inch x 6300 ft. Each chain is 3 inch x 3000 ft. Breaking strength of wire rope is 983 kips, and of the chain 1045 kips.
9 (Includes 1 spare) Bruce fabricated (not cast) 15 tonne high holding anchors with Bruce designed chasers. Anchors have been tested to hold at least 15 and up to 40+ times their weight on almost ai type of bottom. The chasers have been designed to be used with wire/chain combination systems and are used instead of the conventional buoy/pennant wire system.
THRUSTERS:
Four (4) Schottel type S 1502 LS 360 degree full azimuthing thrusters.
Each thruster is driven by a 2000 horsepower DC motor at a maximum of 720 RPM through a reduction gear.
PENROD 78 INVENTORY, PAGE 7
Propellw diameter is 8 feet 6 inch and is enclosed in a kort nozzle. Propeller RPM range is ftom 0 to 233 and each thruster dev elopes a thrust of 0-56+ kips. Rig has sufficient DC har*et?t»wer installed to operace thrusters and driliing functions simultaneously.
CRANES: . j
Two National Supply OS435HD Hydraulic/Diesel with 150 foot booms. Rated at 88 kios at 60 foot radius.
PENROD 78 INVENTORY, PAGE 8
SOUTHERN EXPLORATION DIVISION OFFSHORE LOUISIANA
INDEX MAP SHOWING PROPOSED WILDCAT LOCATION—
T E X A S
HOUSTON
CAST BREAKS ARE*
AL AU/NOS CANYON AREA
CA»OCN BANKS ARC*
KEATHLEY CANVON AREA
r ^ U , r L , i EVINC ..-HK
VIOSCA KNOLL ARE*
UlSS1SS!PP> CANYON AREA
BLOCK 204
CREEN CANYON AREA A1WATCR VALlCT ARtA
HALKER R/OGE AREA NG 16-*
100 MILES
T
Y • IOJ390D8QDO
f I
& SURF. LOC.
WELL '&. SURF. LOC. GREEN CANYON BLOCK 204 OCS-G-7036
GREEN CANYON BLOCK OCS-G-7036
204
TEJJCO MC LS (5783 JCRES)
WELL 'A' SURF. & PBHL GREEN CANYON BLOCK 204 OCS-G-7056
'A' 600'
I I 7900' —
V SURF. LOC.
WEU 'C SURF. LOC. GREEN CANYON BLOCK 204 OCS-G-7036
174240OO
NOTEi
HI COORDINATES ARE BASED ON UNNF.RSH. TRANSVERSE UERCAIOR GRID STSTEU. ZONE li.
L A N O F E X P L O R A T I O N PUBUC INFORMATION PLAT
T E X A C O I N C . N E W O R L I A N 8 , l - A .
GflEEW C/WTO/V 5LCT/C 2fK
'JS */££5 SOUTHEAST FROM UOROAM CITY.LOWSIANA
.DRILLING MOD COMPONENTS
Common Chemical or Chemical Trade Name
Aluminum Stearate j "AKTAFLQ-Sr B a r i t e Calcium Carbonate Calcium Chloride Calcium Oxide Calcium Sulfate Carboxymethyl Cel lu lose Caus t i c Potash Caus t i c Soda Chrome l ignite Chrome Lignosulfonate D r i l l i n g Detergent " E - P a l "
Ferrochrome Lignosulfonate Gel
Gypsum L i g n i t e Lignosul fonate "Mud Sweep" "MOR-REX" "Shale-Trol" Sapp Soda Ash
Sodium Bicarbonate Sodium Carboxymethyl Cellulose Sodium Chloride Sodium Chromate Starch
"TX-9010"
"TORQ-Trim"
Description of Material
Aluminum Stearate
Nonionic Surfactant
Barium Sulfate (BaS04)
Aragonite (CaCO^)
Hydrophilite {CaCL2>
Lime (Quick)
Anhydrite (CaS04)
Carboxymethyl Cellulose
Potassium Hydrate
Sodium Hydroxide (NaOH)
Chrome L i g n i t e
Chrome Lignosulfonate
Soap
Non-toxic, biodegradable defoamer
Derived frcm wood pulp
Sodium montmorillonite, bentonite,
a t t a p u l g i t e
CaS0..2Hn0 4 2 L i g n i t e
Lignosulfonate
Cement Pre-flush
Hydrolyzed Cereal Solid
Organo-aluminum complex
Sodium Acid Pyrophosphate
Sodium Carbonate
NaHC03
Sodium Carboxymethyl Cellulose
NaCL
NaCr04.10H2O
Corn Starch
Biodegradable d r i l l i n g lubricant
Biodegradable d r i l l i n g lubricant
DFC : t v POE/3
r
'• i Common Chemical or Chemical Trade Name
"Black Magic"
"Black Magic Supermix*
Diesel
"J e l f l a k e "
MICA
"Pipe-Lax"
"Wall-Nut"
Wood Fibers
MOD ADDITIVES
Description of Material
O i l base mud concentrate
Sacked concentrated o i l base mud
Osed to mix certain' loss-c i r c u l a t i o n p i l l s
P l a s t i c f o i l , shredded cellophane
Loss - c i r c u l a t i o n material
Surfactant mixed with diesel
Ground wallnut shells
Loss-circulation material
DFC tdw POE/3 10/17/87
PROJECTED AIR EMISSIONS REPORT
GREEN CANYON BLOCK 204
. FEDERAL LEASE OCS-G 7036
LOCATIONS "A", "B" and "C"* '
EMISSIONS IN POUNDS PER DAY
TEMPORARY SOURCES1 N O x CO VOC TSP so2
2 D r i l l i n g Equipment
264 57 21 19 18
Other So- ccea 19 11 11 _2 __2
TOTAL 283 72 32 21 20
EMISSIONS IN TONS PER YEAR
**• TEMPORARY SOURCES1 N O x CO VOC TSP so2
2 D r i l l i n g Equipment
38.7 8.4 3.0 2.7 2.6
Other Sources 3 2.8 2.2 1^6 0.3 0.3
TOTAL 41.5 10.6 4.6 3.0 2.9
Emission Exemptions for NOx, CO, voc, iSP and SO? r»r* .Iculated
using the f o l l o w i n g formulas with a distance ti e of S7
mi les.
CO Exemption (E) i n Tons Per tear .
3400 x (distance from shore) 2 / 3 * 340C (87) 2 / 3 = 66,766
NO , VOC, TSP, SQ2 Exemption (E) i n Tons Par Year.
E • 33.3 x distance from shore * 3...3 (87) = 2897
(1) A i r emissions from temporary a c t i v i t i e s that occur in one location for less than three years are exempt from further a i r q u a l i t y review. Temporary a c t i v i t i e s for t h i s proposal w i l l l a s t approximately 293 days, therefore, being w i t h i n the l i m i t s of the d e f i n i t i o n of temporary a c t i v i t i e s .
(2) Based on 60 hph r / f t . from study, "Atmospheric Emissions From Offshore O i l and Gas Development and Production," EPA 450/3-77-026, June, 1977.
(3) Based on emission factors frcm "Compilation of A i r Pollutant Emission Factors," Third Edition SPA Report AP-42, August,
19/77 (Tables 3.2.1-3, 3.2.3-4, and 9.1-2). Included are helicopter landing and take o f f , two trips/week; supply
'and/or crew boats, at dockside, 12 hrs./day, two days/v*ek; fuel storage and t r a n s f e r ; loading and unloading operations
'and i n c i n e r a t i o n of waste paper (averaqe c: 800 lb/mc• for duration of p r o j e c t .
DFC tdw POE/3 10/17/87