bajmlspd: mm* · corrosion inhibitor ph control lubricants various o.enicais composition wyoming...
TRANSCRIPT
In Reply Refer Tot RP-2-1 13 m
ttcratoon Oil Coax«ny Attentions P i . P. R. Schneider Poet Office Bo* S3266 Lafayette, Louisiana 70S05
Ge*-Ueuen«
Pe. ..-.cc it ti&de to youi init ial Plain a Bsi/loretion and Enviiomental Report received Fecenbei 30, IMS, aaeoded January 13, 1986, for Least OCS-G 56C5, Hlock 109, Grand Ii>le Area. Tbia i inn n.clucec the activities proioaed fee Weils A, fc, C, C, and Li.
In accordance vith 30 CfP. 250.34, revit.ee? racer^er 13, 1979, enu our lettar cate*. January 29, 1979, thie flan I'UB been determined to be ooiui/lete us» of January 13, 1986, ano it, now bein« considered for an roval.
Tout i lan control number ia n—2375 anu iliofcld be referenced in your conmunAcaLion and cor restvendmi>ce concerning tbia plan.
Sincerely youti,
BajMlSpd: mm*" Acting Regional £ui/crvi*or Rules and Pzcductlon
bcci Leaae OC6-0 5665 (OPS-3-2) (PILE ROOM) 10JP8-3-4 w/PuLiic Info. Copy of the plan and BP (PUBL.REC.)
ttJTolbcrttrbrt1/13/86 Disk la
Pr
JAN i: w&
Information Service! IMeaan
Off i f WHS District Houston Division Exploration Unrtad Sutw
Marathon Oil Company
P.O. Box 3128 Houston, Texas 77263 Tetophon. 713/629-8800
January 6, 1986
Minerals Management Service • - ;.M.. P.O. Box 7944 Metairie, LA 70010-7994 .....
Attention: Mr. D.W. Solanas
Re: Plan of Exploration 0CS-G-5665 Grand Isle Block 109
Dear Mr. Solanas:
In response to your request to limit Plan of Exploration wells to no more than five locations, we request that the following three locations be deleted from the Plan of Exploration submitted December 2c, 1985 on the above referenced block:
Location D 6100' FSL & 2400' FEL Location E 1800' FNL & 5500' FEL Location F 1200' FNL & 500' FWL
Very truly yours.
E. M. Dauernhelm, Manager Joint Venture Leasehold
EMD/JLH/pd LSE005V
xc: E. D. Sneed F. F. Schneider D. K, DePrlest W. J. Shortle/M.L. Mouton A. Morale Amerada Hess Corporation Phi l l ips 011 Company TXP Operating Company
Gulf Coast Offshore District Houston Offshore Division Production Operations United States
.A/-2
2 V l \ Marathon ' Oil Company
P.O. Box 53266 OCS Lafayette. Louisiana 70505-3266 Telephone 318/233-8240
Decanber 26, 1985
Minerals Management Service Mr. D. W. Solanar, P. O. Box 7944 Metairie, IA 70010-7944
PLA'J OP EXPLORATION OCS-C-5665 GRAND ISLE AREA BLOCK 109
Pursuant to Part 250, Title 30, Section I , CFR 250.34, the attached Exploratory Drilling Plan for Grand Isle Area Block 109 i s respectfully submitted. The f i r s t well w i l l be spudded by Pebruary 15, 1986.
The Exploratory Plan includes:
1. A description of proposed activity. 2. A shallow hazards letter (proprietary). 3. A l i s t of proposed locations (proprietary). 4. A schematic of proposed locations (proprietary). 5. A seismic horizon, abnormal pressure and cross section schematics
(proprietary). 6. A non-proprietary plat of surface locations and lease block relative
to shore line. 7. A typical semi-submersible r i g , a diverter system, and a typical
blowout preventer schematics. 8. A l i s t of water base and o i l base mud components. 9. Environmental report.
I f additional information is required, please advise.
F. F. SCHNEIDER DISTRICT DRILLING SUPERINTENDENT EASTERN OPERATIONS
pdh
Attachments
EXPLORATORY DRILLING PLAN GRAND ISLE AREA BLOCK 109
OCS-G-5665
Jt i s proposed to d r i l l at least eight (8) exploratory wells pn the subject lease, OCS-G-5665, for the purpose of evaluating the potential of the lease to produce comnercial quantities of oil and gas.
Odom offshore Surveys, Inc. conducted a high resolution geophysical survey on Grand Iale Area Block 109 fbr Marathon Oil Company. The survey was performed with a magnetometer, a sub-bottan profiler, a side scan sonar, an echo sounder, and a DFSV digital seiamic system with a 160 cubic inch water gun as che energy source.
Interpretation of the seismic information allowed the generation of the attached structure maps and a cross sectional schematic of che area showing the expected depths of marker formations. Additional geophysical data will be obtained as warranted as new inforraation is gained during drilling activity.
Based on the present interpretation of seismic information, locations of the proposed wells are listed in ths attached proprietary information copy.
The exploratory vork is to bs done with one or more semi-suhmersible type mobile drilling rigs. As each well is drilled and new information is obtained, the locatior. and number of subsequent wells on the block may change. This contingency is required in order to ontLaize the evaluation of the block with a minimum cf wells in the most strategic locations.
Eoch exploratory well ie projected to require a minimum of 60 days to dr i l l and evaluate. Present scheduling indicates that the f irst well will be spudded approximately February, 1986. Because ar eight (8) well program will require at least 480 days of continuous drilling activity, the complete program as affected by present and future rig scheduling, is projected to extend through May, 1987.
The service base for this exploration program will be Venice, Louisiana. Numerous service facilities, including storage areas, pipe yards, mud companies, helipads, docks, and other related services, are located here and are deemed adequate to support this exploration program.
The Oil Spill Contingency Plan for Marathon Oil Ccmpany WAS approved December 27, 1984. Marathon is a nwraber of Clean Gulf Associates. In the event of an oil sp i l l . Clean Gulf's service ecui-vmint from Venice, Louisiana will be utilized for cleanup operations. Oil spil l respond time is astimated to be ten (10) hours for ths Workboat Mounted Fast Response Systems and twenty (20) hours for the Boas Barge Open Sea Skimmer System.
Gaseous Air Emission projections are located in the attached environmental report.
OLC.iO 1985
Surface Location
6400-4750' 2100' 6100 • 1800' 1200' 5400' S400'
FSL 6 FNL 5 FSL Q FSL 6 FNL 6 FNL 6 FSL a FSL $
5300' 6100' 3800' 2400' 5500' 500' 4700' 5700'
FEL FWL FEL FEL FEL FWL FEL FWL
2 30
257
108
Marathon Oi l Company
O C S - G - 5 6 6 5
BLK. 109 A 6
IIO
I 17
VICINITY PLAT PROPOSED MINERAL DEVELOPMENT
GRAND ISLE AREA G U L F CF M E X I C O
APPLICATION BY DECEMf.f*-
M A P A T H ON O i i . CCMFANY . . A F A Y E T ' E , L <i
i I
J M L'rt J r r r r TTmrrrr -~7 "Mi&W; •:/•>,:. V'V.?(riv/ i
' 1 I TYPICAL SEM I-SUBMERSIBLE RIG
PROPOSED MINERAL DEVELOPMENT GRAND ISLE AREA G U L P OF M E X I C O
MARATHON U L ~.G. LAFAYETTE. LA .
WATER BASE MUD Q31P0NENTS
GULF OF MEXICO
Category
Gelling Agent
Weight Material
Thinner
Viscosifier
Lost Circulation Material
Corrosion Inhibitor
pH Control
Lubricants
Various O.enicais
Composition
Wyoming Bentonite Clay Attauulgite
Barium Sulfate Barite
Sodium Acid Pyrophosphate Leanardite Phosphate Lignite Resign Soaps Sodium Tetraphosphate Ferrochrome Lignosuifonate Chrome Lignosuifonate Polymeric Lignosuifonate Aluminum Chrome Lignosuifonate Calcium Lignosuifonate Hemlock Bark Extract Gilsonite Quebracho
Starch Carboxymethyl Cellulose Sodium Hexametaphospnate Pelletited Asbestos
Cellophane Mica Flakes Ground Nut Hulls Expanded Perlire Diatcmaceous Earth Shredded Leather Rice Hulls
FiL-aing Amine
Potassium Hydrate Caustic Soda
Detergent Castor Oil Alcohol
CaCU CaCo:
OIL BASE MUD CXMPONEHTS
GULF OF MEXICO
- Category
Gelling Agent
Weighting Agent
Thinner or Bnulsifer
Water Loss Control Agent
pH Control
Lost Circulation Material
Various Chemicals
Composition
Organophylic Clay
Barite or Barium Sulfate
Organic Fatty Acid Amines
Modified Asphattine
Lime
Cellophane Mica Flakes Ground Nut Hulls Expanued Perlite Oiatcmaceous Earth Shredded Leather, Rice Hulls
Oil Diesel CaQ2
ENVIRONMENTAL REPORT
PLAN OF EXPLORATION
GRAND ISLE BLOCK 109
OCS-G-5665
MARATHON OIL COMPANY
DECEMBER 31, 198F
COMPANY CONTACT PERSON: MR. ROBERT J. COROES MARATHON OIL COMPANY P. 0. BOX 53266 OCS LAFAYETTE, LA 70505 PHONE (318) 233-8240
INTRODUCTION
Marathon 011 Company plans to conduct exploratory d r i l l i n g
operatlonr at Grand Isle Block 109. This area Is located
approximately 58 miles south of Grand I s l e , Louisiana.
The objective of the proposed a c t i v i t y 1s outlined 1n the Plan of
Exploration. Bri e f l y , the objective is to d r i l l 8 straight
exploratory »e11s. A semisubmersible exploratory d r i l l i n g r i g
w i l l move on location by February, 1936. The duration o' ihe
d r i l l i n g a c t i v i t y Is estimated at 60 days per hole for a tocal
project duration of 480 days. The exploration a c t i v i t i e s w i l l be
completed by May, 1987.
NOTE: The information included in this Plan follows the
Guidelines for Preparation of Environmental Reports for Coastal
Management Consistency Determination by the States of Alabama,
Louisiana and Mississippi. Sections are designated in this
report to conform with those of the Guideline.
DESCRIPTION OF THE PROPOSED ACTION
a. Travel routes for supplies and personnel w i l l be from Venice,
Louisiana to the project area u t i l i z i n g workboats and
crewboats.
One round trip per boat will usually occur every one to
two days. Helicopters will provide air service averaging one
flight per day.
manned and will not require additional personnel. Similarly,
no significant adjustment in activity levels or faclli'.i >s Is
expected In tnrfllsry companies such as warehouses, mud
companies, pipe storage yards, heliports, and other service
companies.
A l i s t of employees to be used in the proposed operations
offshore and onshore Is listed below. The list is typical,
though the exact number of employes. ».?v vary day by aay.
Offshore
b. The Marathon shorebase at Venice, Louisiana is already
Posltion {*•:.».: j " of Em pi oyees
2 2 5 2 1 2 S 1
1 2
1 i
Total, 2 ".rv>ts = 56 persons
Onshore
Posi t i on Number of employer
Warehouse and wharf Helicopter Crewboat Supply (work ) boat
6 3 < 7
T o t a l , 1 , 2 crews « 40 persons 20
The d r i l l i n g r i g v t l l i z e d in Lhe project w i l l be occupied by
approximately 66 pe.'.ns. These workers are currently
assigned to the d r i l l i n g r i g . No additional personnel w i l l
be required as a resuH of the d r i l l i n g a c i t v i t i e s .
c. No new support f a d l i t i t ' , w i i 1 be needed for the propose^
actl v1 ty.
d. No new techniques or unusuai techno,o^y w i l l be used.
e. Travel w i l l be from Venice to Graic Isle Block 109. V-rual
No. i shows the location of the project with respect tr v e
nearest coestal areas.
f. Pipel ne routes, et:. sr« not applicable at this tim;*.
AOPITiCHAI INP Or.MAT iC^
Potential wast.' products from the project w i l l include domestic
solid wastes, sanitary wastes, and d r i l l i n g f l u i d s . D r i l l i n g
flulas u t i l i z e d in the project may be both o i l based and water
based d r i l l i n g muds. Onsnore disposal of d r i l l i n g r • w i l l
depend on che composition of the mu-?. °otential components of
the d r i l l i n g f l v i i d system wil'. include these components commonly
uti l i z e d in this ty Pe of a c t i v i t y . These components are listed
in the Plan of Exploration.
The Marathon 01 ! pany Gul f Coast Offshore D i s t r i c t Oi l S p i l l
Contingency Plan; submitted to .he M.M.S. on Decmeber 5, 1984
and approved December 27, 1 9 f t . d.;cusses contingency puns fo r
p reven t i ng , r e p o r t i n g , and d e f i n e , up s p i l l s of o i l or waste
m a t e r i a l s . The Contingency Plar describes p o l l u t i o n prevent ion
procedures and r e s p o n s i b i l i t i e s for Marathon Oi l Company
employees and cont rac t personnel . p e c l f l c dut ies fo r Marathon
employees involved 1n the Implementation of contingency plans are
o u t l i n e d 1n the Oi l S p i l l Contingency Plan. The dut ies of
con t rac t o i l s p i l l cleanup companies JU- also addressed.
Marathon 01" Company I * * member of Clean Gulf Associates (CGA).
: che event of a major s p i l l , equipment owned by CGA would be
u t i l i z e d in the s p i l l con t ro l and cleanup e f f o r t . CGA maintains
s p p i roftt.ral and cleanup equipment at var ious coastal
comauTn't' s on t..e fijtf Coast (Clec.n Gui f A i : o c f a t e s , Operation
Manual. 983) i n c l u d n i j Grand I s l e , Venice, Gf«» ia , and Houma,
Lou is iana . Each of tr.ese l oca t i ons is r e l a t i v e l y nrcximate to
the p r o j e c t s i t e .
I t is Marathon Oi l Company's po l i cy that a l l employees a.r»d
con t rac to rs w i l l comply w i th the p o l l u t i o n prevent ion
requirements of ICS Orders 5 and 7.
- 4 -
3. DESCRIPTION OF TH£ AFFECTED ENVIRONMENT AND IMPACTS
a. (1) Grata Isle Block 109 ir not know , to be in an
environmentally sen itive area While the d r i l l i n g rig is
located over the proposed well sites, 2.5 to 5.0 acres of
seafloor will be removed from commerlcal bottom fishing.
Grand Isle B1 oc* i'j? Is not located near any major oyster
area?. The block lies within the limits of the industrial
bottomflsh harvest areas as well as the principal menhaden
harvest area as shown on Visual 4-1 of the Mineral
Management Service Environmental Impact Statement Visuals.
The project is not expected to impact commerlcal fishing
slgni fIcantly.
(2) Grand Isle Block 109 lies outside of any maj.u-
dipping fairway, anchorage area, or transit lane.
(3/ The use of pleasure craft in the project area may be
directly affected by the presence of the dr i l l i n g rig. A
discussion of these impacts can be found in ..he Final
Regional Environmental Impact Statement for the Gulf of
Mexico published in January 1983.
Maratiion 011 Company was a participant of the Minerals
Management Service sponsored study of the recreational use
a s soc4 * ved with petroleum structures. The objective of
the stu^; was to document the number or pleasure boati
asset *' a: »d with OCS recreational fisning. Although the
study .as '>een concluded, Mv *. Wor, will continue to
suppo< • pleata.** -nd sport f'^.tng on tho OCS
5-
(4) Orard a'aclc 100 1s located outside the historical
cultural resources probability l i n e . The proposal' well
t1te; ap •ar to be located In an area with no unmanageable
sri«*low d r i l ' ng hazard: or arcr.eelogical Sites* The
block seafloor *'*cws ;.o evidence or drowned archeological
or cultural resorccs.
(5) The project cr*a 1s not proximate to earlne sanctuaries or
breeding grounds. Wildlife refuges, breeding and spawning
grounds, and marine and estuarine sanctuaries w i l l not be
affected by a c t i v i t i e s associated with this project.
(6) There Is no Indication of pipeline., or other lanmade
structures near the proposed well sites. No (noun cables
or pipelines exist on Grand Isle Block 109.
(7) There are no other known alnera's uses at Grand Isle Block
109.
(8) The geology of Grand isle Block 109 i : variable, surface
geology consists s-iaarily of s i l t y 'ay sediments.
Geologic featu'i'i Include coastal anc Shelf Deposits.
Specifics of the block geology are Included In the Plan of
Exploration.
-6-
Tht •ost significant source of solid wastes for the proposed
activity 1s cuttings from the bore hole and associated
drilling fluids. The cuttings are normally dumped at the site
and consist of rock particles ranging from grain to pebble
size. The amount of cuttings from a 10,000 foot well Is
estimated to be 1,000 tons.
Impacts on the environment from these cuttings would Include a
burying of benthic organisms found at the rig site. Duration
of this Impact would be short as the cutties will settle to
the bottom. The overall impact on benthic organisms will be
of a localized and temporary nature. A 11st of drilling mud
additives utilized t*. tte* -t/ojecI Is Included In the Plan of
Exploration.
The cuttings are processed over a shale shaker and washed to
remove drilling mud and oil from them. Some of the mud may
become entrained with che drilling fluids and cause a
turbidity plume. The long term effects of the plume are not
known a'though localized impacts on the phytoplankton
population can be expected. No oil based drilling fluids will
be discharged overboard.
Wintt- and summer currents In Grand Isle Block 109 run
generally to the northwest at 36-41 cm/sec with occasional
variances.
-7-
Grand Isle Block 109 does not lie In a U.S.E.P.A. approved
Ocean Dumping Site.
(9) Four species of aarine turtle occur in the Gulf of Mexico.
These are the loggerhead, green sea turtle, Atlantic
Ridley, and hawksbill. These turtle species are on the
endangered species l i s t . Turtles In the vicinity of the
project area would be vulnerable to major oil spills and
possible collisions with boats. The potential for an oil
spill 1s remote. No turtle nesting grounds are located in
the vidnity of the project area, transportation routes,
or shore support base. There Is little reason to suspect
disruption of turtle migrations.
Of the marine mammals occurring in the Gulf of Mexico, the
sperm whale, black right whale, sei whale, fin whale, and
blue whale are on the endangered species l i s t . Lowery
(1974) presents a discussion of the state of knowledge of
the marine mammals off the coast of Louisiana and Texas.
From the Information presented, It appears that any
endangered whales discovered in the project area would be
strays, if they occurred at all. Resident populations of
these whales are either In colder waters, deep waters, or
more tropical waters. Porpoises of the genus Stannella,
Tursiops, and Del phi nus are expected to commonly occur 1n
the project area.
-3-
The whooping crane and brown pelican were listed as
endangered In 1967 and 1970, respectively. The
transportation routes fron the project area to the
shorebase (Venice, Louisiana) are not in the vicinity of
the critical habitat for these species.
-9
b. No socio-economic data beyond that already provided
Is required.
UNAVOIDABLE ADVERSE IMPACTS
An unavoidable and Irreversible Inpact to the geology will
occur due to the removal o* rock cuttings froa the
subsurface strata. This impact is considered negligible.
The water quality In the immediate vicinity of the drilling
rig will be temporarily degraded by the turbidity resulting
froa the drilling fluids and cuttings. Iapacts on the biota
of the area will be of aixed quality and duration. The
negative Iapacts will Include the burying of Lenthlc
organlsas by the cuttings and the minor decrease In
phytoplankton productivity due to the drilling aud plume.
Organism recovery rates would be dependent upon seasonal
reproduction cycles and recolonization by Indigenous and
other spedes. Estimates for recolonization range froa
aonths to several years.
These Impacts are justified due to the temporary nature of
the effects of cuttings disposal on local water clarity and
benthic organisms.
5. REFERENCES
The following information sources were used in the
preparation of this document:
Clean Gulf Associates, Operations Manual, 1983
Lowery, G. H., Jr., The Mammals of Loulsi ana and Its Adjacent Waters, LouTsTana stateUm versi ty, T9T4
Marathon Oil Company, Gulf Coast Offshore District Oil Spill Contingency Pl an, Lafayette, Louisiana, 19IT4"
U. S. Department of the Interior, Minerals Management Service, Final Regional Environmental Impact Statement, Gulf of Mexico c
U. S. Environmental Protection Agency, Compilation of A1r Pollutant Emission Factors, 3rd Edition, AP-42, 19/7
Zingula, R. P., "Effects of Drilling Operations on the Marine Environment," Environmental Aspects of Chemical Use i_n Well Dr i l l ing Operations, EPA SCOil-;5-00T,T7T5
The proposed activity on OCS-G-5665; Grand Isle Block 109
will be carried out and completed with the guarantee of the
following Items:
1. The best available and safest technologies will be
utilized throughout the project. This Includes meeting
all applicable requirements for equipment types, general
project layout, safety systems, and equipment and
monitoring systems.
There will be no new or unusual technologies utilized
throughout the project.
-11-
No new employment for related onshore fa c i l i t i e s w i l l be
required as a result of this projected activity.
All operations wil l be covered by a M.S.S.-approved oil
spill contingency plan. Marathon's Gulf Coast Offshore
District Plan dated December, 1984, for the preventing,
reporting, and cleaning up spills of oil or waste
materials, was approved December 27, 1984.
(See Appendix I)
All applicable Federal, State, and local requiremencs
regarding air emission and water quality for the
proposed activities, as well as any permit conditio:*,
will be complied with.
COASTAL ZONE MANAGEMENT
CONSISTENCY CERTIFICATION
PLAN OF EXPLORATION
Grand I s l e B lock 109
OCS-G-5665
The pi d e s c r i b e d i n d e t a i l i n t h i s p l a n comply
w i t h the S t a t e o f L o u i s i a n a ' s approved Coas ta l Zone Management
P r o g r d * and w i l l be conduc ted i n a manner c o n s i s t e n t w i t h such
program. A r e q u e s t f o r p u b l i c a t i o n o f P u b l i c N o t i c e o f a P lan
E x p l o r a t i o n has been made w i t h the S t a t e T imes , the o f f i c i a l
Lou i s i ana s t a t e j o u r n a l . The n o t i c e w i l l be p u b l i s h e d i n the
l e g a l Ad S e c t i o n of the S t a t e Times i n J a n u a r y , 1986.
MARATHON OIL COMPANY
W. Z. rfourke D i b t r i c t P r o d u c t i o n Manager Eas te rn Area
APPENDIX I
Notice of U. S. Geological Survey (Minerals Management Service)
Approval of the Marathon Gulf Coast Offshore District Oil Spill
Contingency Plan.
-14-
PLAN OF EXPLORATION GRAND ISLE BLOCK 109
GASEOUS AIR EMISSION PROJECTION TOTAL SOURCES
rborne pollutants In thi? j-ojecc will be generated by engines on the drilling g, supply and transport » 'ts, ana helicopters. Attached are summaries of the
rejected emissions from ea* of *nese sources for one year as well as for the .tion of the project. Th* s n of these projected emissions were used to
calculate the total projected r.«i$sions and the exemption status as listed below.
EMISSION EXEMPTION TOTAL PROJECTED EMISSION, PARAMETER AMOUNT (Tons/Year) T Yr. Duration (Tons) STATUS
S02 1931.40 13.33 EXEMPT
TSP 1931.40 14.33 EXEMPT
N0X 1931.40 239.81 EXEMPT
CO 50,944.39 44.41 EXEMPT
VOC 1931.40 16.07 EXEMPT
Emission exemption amounts are calculated based on the following formulas from CFR 30, Part
2570.5/-».
E « 33.3D (For SO2, TSP, N0X, and VOC)
E - 3400D2/3 (For CO) Where E is the emission exemption amount in tons per year and D is the distance of the facility from the closest onshore area of a State expressed In statute miles."
-is.
PLAN OF EXPLORATION GRAND ISLE BLOCK 109
GASEOUS AIR EMISSION PROJECTION DRILLING RIG EMISSIONS
PROJECTED 480 DAY EMISSION FACTOR* PROJECTED ONE YEAR PROJECT DURATION
PARAMETER (lb./Hp-hr.) EMISSIONS (Tons) EMISSIONS (TONS)
SO2 2.0507 x IO" 3 4.88 6.42
TSP 2.2026 x IO" 3 5.23 6.87
N0X 3.0337 x IO" 2 73.16 96.21
CO 6.674 x IO" 3 15.83 20.82
VOC 2.467 x 10 5.85 7.70
TOTAL PROPOSED DEPTH ON POE * 8(13,000') = 104,000' •
PR0JEC1ED ONE YR. EMISSIONS • (365 DAYS)(104,000')(60 HP-hr) 480 DAY5 f t
**(EMISSI0N FACTOR lbs)( TON ) HP^fir ZOOO TB".
TOTAL PROJECTED EMISSIONS = (104,000')(60 HP-hr)(EMISSION FACTORH TON )
f t 2000 lb.
* Emission factors taken from "Compilation of Air Pollutant Emission Factors", 3rd Edition. AP-42, U.S.E.P.A., 1977, pgs. 150-151.
** 60 Hp-hr d r i l l i n g power requirement taken from "Atmospheric Emissions from Offshore Oil and Gas Development and Production, EPA-450, 1977, pg. 86.
-16-
PLAN OF EXPLORATION GRAND ISLE BLOCK 109
GASEOUS AIR EMISSION PROJECTION WORKBOAT SOURCES
Workboats w*y consume up to 45,000 gallons of fuel per month. Based on this quantity of fuel consumed, the projected emissions from this source w i l l be as follows:
PARAMETER
S02
TSP
EMISSION FACTOR* (lbs/1000 gal fuel)
31.2
33.5
PROJECTED OWE YEAR EMISSIONS (Tons)
8.<
9.05
PROJECTED EMISSIONS 460 DAY PROJECT DURATION
11.08
11.89
N0X
CO
V'JC
469.0
102.0
37.5
126.63
27.54
10.13
166.51
36.21
13.31
PROJECTED EMISSIONS -(45000 GAL/MOMNO. OF MONTHS ON PROJECT)(EMISSION FACTOR)( TON )
1000 GAl 2000 l b .
'Emission factors are based on data from "Compilation of Air Pollutant Emission Factors, "3rd Edition, AP-42, U.S. EPA, 1977.
PLAN OF EXPLORATION GRAND ISLE BLOCK 109
GASEOUS AIR EMISSION PROJECTION HELICOPTER SOURCES
Helicopters used 1n this operation are expected to Make one trip per day during the 480 day project duration. While In the immediate vicinity, emissions wili occur during takeoff and landing. Projected Emissions are as follows:
EMISSION FACTOR* PROJECTED ONE PROJECTED EMISSIONS PARAMETER (lbs per cycle) YEAR EMISSIONS (Tons) 480 DAY PROJECT OURATION (Tons)
S02 0.18 0.03 0.04
TSP 0.25 0.05 0.06
N0X 0.57 3.10 0.14
CO $.7 1.04 1.37
VOC 0.52 0.09 0.12
POROJECTEU EMISSIONS - (EMISSION FACTOR)(TOTAL HO. DAYSH TON )
2000 lb. 'Emission factors are based on du a from "Compilation of Air Pollutant Emission Factors, "3rd Edition, AP-42, U.S. EPA, 1977.
-18-