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In Reply Refer To: HS 5231 Ju ly 27. 1990
nut •
Chevron U.S.A. Inc. Attention: Kt. J . H. Daniel Poet Office Bv: 61590 New Orleans, Louisiana 70161
Gentleaen:
Reference ls made to the following plsn received July 13, 1990:
Type Plsn • l n l t l i l Plsn of Exploration Lesse - OCS-C 12133 Block - 828 Ares - Evlng Bsnk Activities Proposed - Wells A through E
In sccordsnce with 30 CFR 250.33, this plsn Is hereby deemed subaitted and ls now being considered for spprovsl.
Your control nuaber ls N-3772 snd should be referenced In your communication snd correspondence concerning this plsn.
Sincerely,
n tr
0. J . Bourgeois Rsglonsl Supervisor Field Operstions
bcc: Less* OCS-C 12133 POD File (MS 5032) Off.ce of
ftogfifn Strife*
MTolbert: cck: 07/16/90: POECOM JUL J 1 1990
Information Sarvtcts SactJm
Chevron Chevron USA Inc
• j j f c ^ PO Bo> fc'
July 10. 1990
Proposod SupplttJtntal Plan of Exploration Ewlng lank Hock 828 ftS-j 12133
CERTIFIED MAIL - RECEIPT WESTED
U. S. Department of the i n te r i o r Minerals Management Service 1201 Elmwood Park Blvd. New Orleans, LA 70123-2394
Gentlemen:
Chevron U.S.A. Inc., operator for the Ew.ig Bank Block 828 OCS-G-12133 lease, ant ic ipates that f ive (5) wel ls may be necessary to de1.1ne*te the hydrocarbon po ten t ia l of this t ract .
The locat ions of the f ive (5) proposed well Is as fo l lows:
Well Wo, Surface Lot i t l on
"A" 1000' FEL & 4250' FNL Ewlng Bank 828
"B" 2250' FEL 1 55UU' FNL Ewlng Bank 828
"C" 2250' FEL & 700' FNL Ewlng Bank 828
"D" 300' FEL & 6400 FSL Ewlng Bank 82b
"E" 4900' FEL I «300' FSL Ewlng Bank 828
1. A geophysical checkshot survey 1s plant , in the f i r s t well ei ther at to ta l depth or soa* lesser depth u t i l i z i n g an a i r gun as an energy source and an In-hoi* neophone as a receiver.
2. A Cultural Resource report Is not being f i l e d for OCS G 12133 least. A hazard survey has been f i l e d for the OCS-G-12133 lease and there are no amplitude anomalies w i th in 200' of the proposed well locat ion.
P2F826 PUBLIC INFORMATION
Department of the Interior -2- July 10, 1990
3. We plan to uti l ize • semi-submersible rig similar to the "Ocean American" to dril l these wells Specification attached)
Safety features will Inc de well control and blowout prevention equipment at least as good as described In OCS Order 2. Appropriate l i fe raf ts, l i fe Jackets, ring buoys, e tc . as prescribed by the U.S. Coast Guard, wil l be provided. Pollution prevention and control features will Include al l necessary coaming drains and holding tanks to prevent contamination of the sea, in accordance with OCS Order No. 7 "Pollution and Haste Control".
4. The first well on the OCS G 12133 lease Is currently scheduled for dr i l l ing as early as April 1, 1991.
5. Onshore faci l i t ies
The service base for this area will be Leevi l le, Louisiana. Numerous service fac i l i t ies , Including mud companies pipe companies, dock space, warehouse, helipads and the like are found here. These existing fac i l i t ies will be utilized and are considered adequate to handle the various jobs without any expansion or significant changes In activity levels.
6. Qll-Splll ConllngincY PUn Chevron U.S.A. Inc . 's 011 Spi l l Contingency Manual was approved on May 25, 1989. Chevron maintains at Hs own expense various types of eauipment to ceal with oil s p i l l s . Included are booms, large and small vessels, skimmers and the l ike . Additionally, Chevron Is a member of Clean Gulf Associates. In the unlikely event that a spi l l occurs, even thoug It may not be originated with • Chevron operation or fac i l i t y , an alert procedure Is Immediately instituted. Immediate notification Is made to the Division Manager level and to appropriate Federal and State Agencies. At the same time, efforts are begun to stop and contain the spi l l and to assess what, If any, equipment wil l be needed.
If the spill Is too large for the on-site personnel to control, Company eauipment, fac i l i t ies and personnel will be Immediately marshalled and, If needed, Ciean Gulf Associates will be called In. Chevron bases at Leeville, Bayou Boeuf (Morgan City), Cameron and Sabine Pass are on a continual standby basis with appropriate contingency responses assigned to them. Clean Gulf Associates maintains fac i l i t i es and equipment at Grand Isle, Louisiana. The primary oil spil l base to be utilized will be Grand Isle. An estimation of the response time for procurement of the equipment, equipment transportation vessel , and the personnel to load and operate the equipment Is 4 hours, equipment load-out 1s 1-1/2 hours, travel to the deployment site Is 13 hours, and equipment deployment Is 1 hour.
7. Air Fjalsslons/Environmental Benorts
The Air Emissions/Environmental reports for the dr i l l ing equipment to be used for Ewlng dan< Block 828 are attached.
P2F826
Department of tht I n t t r l o r -3- July 10, 1990
8. ConiUUncv Statement A Consistency Cer t i f i ca te pledging our compliance with Louisiana's Coastal Zone Nanagement Is attached.
Chevron U.S.A., Inc. believes that the geological structure map and schematic cross-section map submitted are exempt for disclosure under the Freedom of Information Act and should, therefore, not be made avai lable to the public or provided to any affected s tate or to the executive of any local government.
To comply with requirements of 30 CFR 250.34, the fol lowing Information Is attached:
Location Plat V i c i n i t y Map Rig Schematic - Specif ication Coastal Zone Management • Consistency Cert i f icate - Public Notice C r i t i c a l Operations and Curtailment Plan Mud Additives, Dr i l l i ng F lu ids , e tc . A i r Emissions Report Environmental Report
Time to complete 0CS-G-7787 "E" 1s ± 80 days.
I f any additional Information Is required, please contact Ms. Shirley Rondeno at (504) 569-3729.
Very truly yours,
^*^L J. H. Daniel Attachments ^
P2F826
WBUC INFORMATION
Ewing Bank 828
PSSCRIPTIQW Qf [hYlRwtflENTAi SAf[GUARDS AHD PQLLUT1QW PREVEHTIM tSlBII Tht Final Environmental Iapact Stattatnt for Gulf of Mtxlco Salts 123 and 12S for tht Ctntral and Wtsttm Planning Artas dattd August, 1989 discusses trajtctory simulations. An oil spill from tht Ewlng Bank 828 would havt a 2% chance of Impacting Terrebonne Parish, 1% chance of Impacting Lafourcht Parish, Louisiana within ton (10) days. (Copies of tht spill arta map and probability tablt art Included in ths Oocument as Attachment III.)
If a spill should occur from proposed location, Chevron would Immediately activate Its Oil Spill Response Team, determining from current conditions the probable location and time of land fall. Then using tht Cltan Gulf Operations Manual, Volume II, Louisiana Maps 6 and 7, Identify the biologically sensitive area and determine tht approprlatt response mode. Upon activation of tht proper equipment, Chevron would dtploy It as suggested by Section VI of Volume II of tht Cltan Gulf Operations or a* appropriate to effectively respond to site specific circumstances.
During drilling operations, domestic wastewater (consisting of water froa human body wastes, showers, dishwashers, etc.) will be discharged Into the Gulf after treatment using the rig's U.S. Coast Guard approved treatment facility. The volume of treated domestic wastewater during drilling 1s expected to be a maximum of 1250 gallons/day, based on 25 gallons/man/day.
Drill cuttings are dumped overboard after screening and recovering the liquid phase (aud). This procedure Is followed only after the aud systea has been tested via bioassay and the LC50 value Is greater than 30,000 ppa. The bioassays are performed regularly and in accordance with NPDES regulations. In the event oil Is Introduced Into the systea, all dumping of both the liquid and solid phases 1s ceased. After the solids have been screened, thty art placed In approvtd containers and shipped to our shore base and on to a State-approved disposal site via an approved carrier. The liquids that are not retained for rtust are disposed of In the saae aanner. Dumping will not be resumed until tht systta has attained an acceptable LC50 valut and tht oil has bttn rtaovtd froa the systta.
Calculation of tht dlschargt ratt 1s dont by tht aon1 toring of solids control tquipatnt which shows the generated hole voluae and the volumes dumped froa solids laden pits such as the sand trap. Calculations are aade to Insure that the maximum discharge rate of 1000 barrels/hour Is not exceeded.
During drilling operations approxlaetely 7125 ban els of cuttings will be discharged. Approxlaetely 150 barrels a day of aud will be duaptd through fluid loss through solid control equipaent. After tht total dtpth Is rtached, a total of 2000 barrels of aud will be discharged.
In accordance with tht rtqul reewnts of 30 CFR 250.67, bastd on scout ticket data fron tht Conoco wells In Ewlng Bank Blocks 828 and 872 and the BP Mobil wtlls In Ewlng Bank Blocks 826 and 782, no H2S 1s antldpattd 1n tht drill lg of any wtlls on the OCS-G-12133 ltast. Although no sptclflc testing for H2S has been done, wt feel that wt will not tncounttr H2S 1n drilling tht proposed wells. Chtvron hereby requests that tht Arta In which tht oporations will bt conducted bt Classified as an area where the abstnce of H2S has bttn conf 1 rsted.
Figure IV-3: Land segments and launch sites used in OSRA.
1 2 3 4 3 6 7 8 9 10 11 12 13 14 IS
Land Segment
13 14 13 16 17 18 19 20 21 22 23
PfosMbtMties (expressed M wdl Contact •
Table IV-6
chance) that an Oil Spill Starting at a Particular Location Land Segment wilhin 10 Days (Gen* Sales 123 and 123)
Hypothetical Spill Location
Wl W2 W3 W4 W3 W6 W7 wt W9 WI2
35 4 3 16 6 2 II 31 11 1 4 1 1 19 31 2 3 7 3
3 32 5 9 | 1 12 20 10 6 1 1 1 1 31 21 3 7 1 11
3 7 3 Sl 12 26 27
1 36 21 4
12 11 4
2 16 4 1
I 9
30 2
10 36 6 1
I 3
14
7 10 13 26 29
29 10 3
3 3 4
14 22 15 2 3
I 10 19 36
I 3
73 18 7 3 1
11
3 4
41 13
2 1
16 10 1 8
29 19 II
Hypotrietical Spill Location
C36 C37 C38 C39 C40 C4I C42 C51 C52 C53 CS4 C56 C57 C» C59 C60 C61 C68 C69
<
IV-6. Pivbttttkm (expressed • perant chance) thai aa Ofl Spil Starting at • rartictilar Location wiU Contact • Certain Land lODarMOWSska 123 and 125) ( ll i f )
Hynctfhetical SpiU Location
E70 E71
22 2 23 20 24 32 11 25 2 17 26 14 27 6 21 29 30 31 32 33 34 35 36 37 39 41 42 43
1 5 7 2
3 4 2 5 16 I
1 3 2 21 4 6 7 1
16 15 1 4 22 3
2 9 1 1 1 1 10
2 1
1 1
St* OK Hamua and Lear. 1988
1
I cor*oco #1 OCS-G-4033
9500*
. #1 ST1 - '-y* 7799
TORIfC m o p ^ „ . CHEVRON OS.A. EWING BANK
BLOCK 828
SCALE "TOOO
©mm Harsh Environment/Deep Wata. Sarvlca
Self-Propelled SemisubmarsiMa
Drilling Unit
ask • c u n D r i l l i n g S L E x p l o r a t i o n C o m p a n y
IOOKCO •UIUDIN*
iaoo C A N A L • m r c T m. o. no~< • 17• o
N I W O R L I A ^ I , L A - 7 0 1 « l
7/89
0CEA1 AMERICA
GENERAL INSCRIPTION AMO EQUIPMENT LIST
Tht OCtH AMERICA 1? an Inhouf-e. 00ECO designed, deep «»ter to ta l l y i t l f p r o p t l l . 1 semisubmersible #r*11!-9 unit designed to .»,erate 1n severe envi reifs*,* areas oi' the w j r l d . Cmaned s t a b i l i t y , structural strength, high po (whence and e f f ic iency after* OCECO's guideline la th t development o ' t h i s taut which Include Incorporating the necessary « in ter lzat lon and dec* .oad cauc l ty to enable 1t to operate both in typical North Sea typa envi ronavntal conditions and 1n renote deep water areas for extended periods without regular l og i s t i c support. S t ruc tu ra l l y , the OCEAN AMERICA 1s designed to withstand simultaneous loading of 120 knot winds, 3 knot current and waves of 110* Height at IS sec. period *nd 60' height at IT sec. per iod.
A . GENERAL DESCRIPTION
Length N l I length 390'-0" Overall width of lower hul ls (excluding uol&t t rs) 233'-UM
Lower hv. I si.*p-snaped pontoons (width) 57' 0" Lower v ' i ship-shaped pontoons (deptn) 28' 0" Dlxaewr of s t a b i l i t y columns 46* 0" 01 an. Mr of st ructural columns 23* 0" Height of upper deck tbovt bottom of hul 1 142* 0" Transit draf t (maximum) Dr i l l ing dra f t (nominal) 80' 0" Saftty draf t (depending on dock I j i d and disconnect) Distance from rotary to water at 80* d ra f t Air gap at CO* i r l l l l r e j draf t 40 ' -0 " Dr i l l i ng dra f t d lspUcetent ( ) (knot winds) long " ns Safety d r i f t d1sp1ar.au -it ( ) (100 knot winds) lc i " j Transit d r i f t dlsplacemert ( ) l r ^ tons Maximum opening through c e l U r deck
. I ,a<r deck maximum vt"*t'ical clearance
tfa r l w i e dec* loed i t tr&JtsH long tons Variable deck loed i t safety > i f t UOO k t . winds) long tons Varied.* deck loed at d r i l l i n g •: a f t (8t k t . win*:) 7 5 ^ 3 long tons
tATER DEPTH NAT 1 Iai; r e t u r n 136' 0" Ma*1..jm 4,500' 0"
I f the 86 k t . allowable KG curt- 1s 1n use, there mu . be a plan to r r «*t beck to the 100 k t . I'.lowabl* KG curve within 8 hours In the *»v»"\ cf winds <n excess of 85 k ts . sre predicted.
1
APPROXIMATE NATURAL PERIOD:*. Roll Pitch Heave
45.1 seconds 43.6 seconds 21.5 seconds
CAPACITIES
Bulk storage capacity In columns: On Deck:
Liquid mud capacity: Main pits Nud retum pits
Seek storage capacity: Fuel 011:
Loner hulls Upper deck
20,000 cu ft 4,000 cu ft
2,494 BBL 500 BBL
16,430 Mr*a
13,484 BBL 603 BBL
Drill water (1n lower hulls): Potable water (1n columns): Lube o i l : Base 011 Storage (lower hull): Completion fluid s t e tge (lower hull): Substructure (combine 1 loading):
16,300 BBL 1.260 BBL
200 BBL 2,000 BBL 2,000 BBL 3,280 kips
AREAS:
Naln Deck Drill Floor (clear area) Cellar Oeck Hud and Cement Sack Storage Pipe Racks (clear area) Other stores and workshops
L WING QUARTERS:
HEL IDE OX:
21,800 sq f t 2,200 sq ft 8,500 sq ft 3,740 sq ft
11,375 sq ft 19,800 sq ft
102 men
89' x 89' - raved for Booing BV 234 twin rotor helicopter.
•Chinook
PROPULSION StSTEH: Propulsion 1s provided by four (4) 2,700 hp El Hot double armature OC electric motors each driving a single four bleded, 3.1 meter diameter propeller. Two (2) propellers are on each of the two lower m i s . Steering It provided by e 1 ectrohydreu. ical ly operated dual rudders on each of the lower hu l ls .
2
MOORING SYSTEM:
Anchor tfl rich/wi ndl ass: Two (2) Skagit combination chain/wire rop* eler-t r l c anchor winch/wind I at ses ara Intra;,to* DA tach of tnt four s taomty columns (cot*' of ttcn with tht following cnaracttr1tt1c»:
Falrleadtr:
Anchors:
Chain orytj Rat to load Soted at rattd load Band brake capacity Dynamic (motor) orakt
capacity 9 460 f t . /aan . -Chain stopper :apadty Stal l ad Or War
Parmac /-dO dynamic brakt -
S pocket 446 kips SO ft/m1n
1.450 kips
150 kips 1,450 kips
670 kips 800 hp GE 752
X motor 5.000 hp
All w1ncrt/«i.idlassas and control units art tnclostd and prottcttd from wtathtr. Emtrgtncy r t l t ts t capability from tht ballast control room 1s a ls j provldtd.
Eight (8) swlvtl typt f a V a a d t r s .
Eight "Moorfasf anchors, 20.4 MT tach (4S,GV0 lb.)
Archor W W Wire Rope: 3.900* of 3-1/C special strtngth (oil Mg ORQ plus 20 ptrctnt) cnaln, and 5,600' of 3-1/2 , 6 x 36 w1"« ropt for tach windlass unit.
Chai- brtak t ts t : 1.45C kips Cnaln proof Ttst: 1.015 kips — ' Mlrt Ropt Brtak Test: i.250 kips
CLASS:
Eight (8) permanent chain chasers
ABS - AMS Maltese Cross A-l M Column Stabilized Drill ing Unit for Unrestricted Octan Service.
REGISTRY: U.S. flag/U.S. Coast ttuard Drill ing unit to also comply with applicable UK OEM, U.S. MMS and SOLAS Regulations.
- 3 -
DULL FLOOR EQUIPMENT
1. Drawworks - Continental Emsco ZS, Typt I I complttt with htavy duty Drtt tch 150bO aux i l i a ry Drake, Catheads, 2-motor drive skid un i t , sand r e e l , crown-o-mat1c and leaus grooving on drum for 1-5/8 d r i l l 11 n t . Drawworks driven by two (2) GE Kinematic CD 9742, 1,750 hp OC motors.
2. Derrick - Branham Industries, Universal Beam Leg Derrick 40' x 40' x IBS ' , 1,800,000 lbs. gross nominal capacity, 1,400,000 lbs . stat ic hook load capacity with 14 l i n t s strung, complttt with crown block, guide system for block and motion compensator, BJ lower racking arm and racking capacity for 25,000' of 5" d r i l l p ipe. Adjustable casing stabbing board for 30' t o 50' casing range.
3. Top Drive - Varco TQS-3 1,000 hp (1250 hp Intermittent) top drive d r i l l i n g system, driven by GE-752 DC motor, complete with pipe handler, remote upper safety valve, torque wrench and l ink actuator.
4. One (1) d r i l l »tr1ng motion compensator, NL Model 18/600 wi th 1,500,000 l o . s t a t i c load capacity, 600,000 l b . compensating load capacity, w i th Integral t ravel ing block grooved for 1-5/8" d r i l l Une.
One (1) BJ Modtl 5760 Dynaplex hook (750 t o n ) .
6. One (1) Continental Emsco Model L6650 swivel (650 ton).
7. One (1) Continental Emsco T-4950 (49-1/2") rotary mounted with 800 hp GE-752 OC motor with transmission.
8. One (1) Mathty "Survtyor" wirel ine Un i t , Model GCS-B2, with 18,000' of 0.105" w i re l i n e ; hydraul 1ca1 ly powered.
9. Dead l i n t anchor.
10. Ont (1) Varco Iron Roughneck/pipe handling systtm which Incorporates a hydraulic operated combination spinning and torque wrench.
11. Standard d r i l l f l oo r Instrumentation consisting of d r i l l e r ' s console wi th weight Indicator and related readouts for mud pump pressure, mud p i t volumes, mud f low, mud gain/loss, rotary torque. Recorders f o r readouts.
12. One (1) e l r conditioned/heated operations o f f i ce locattd at t h t d r i l l f l o o r w i th a l l remote instrumentation required to monitor and observe the d r i l l i n g functions.
13. One (1) a i r conditioned/heated d r i l l e r ' s console house located at d r i l l f l o o r .
WJP SYSTEM AMD EfJUlPHEMT
1. Three (3) Continental Emsco FB-1600 triplex nud pumps complete with pulsation dampeners, relief valves, discharge assemblies with strainer, pressure gauges, discharge manifold and 11 ner wash pumps. Each pump powered by one (1) 1 ,750 hp direct drive GE Kinematic CO 9742 OC motor.
2. Two (2) 6 x 8 R Mission Magnum centrifugal pumps each with 100 hp electric motor for low pressure mud mix service.
3. Two (2) 6 x 8 R Mission Magnum centrifugal pumps each with 100 hp electric motor for charging main mud pumps.
4. Two (2) 6 x 8 R Mission Magnum centrifugal pumps each with 100 hp electric motor for desander service.
5. One (1) Brandt t r ip le tandem shale shaker. Capacity 1s 1,800 gpm with 18 ppg mud.
6. One (1) t r ip le Derrick Flowline Cleaner. Various mud characteristics and dril l ing rate may effect screening capacity. Average flow with 40 viscosity mud 1s 285 gpm using 175 mesh screens as taken from the Derrick Solid Control Equipment Capacity Chart.
Note: The OCEAN AMERICA 1s equipped with a cascading mud return system. The Brandt triple tandem screen shakers are located 1n the shaker house. The tr iple Oerrlck Flowline Cleaners are also located 1n the shaker nouse and downstream of the Brandt unit.
7. One (1) SWACO degasser.
8. One (1) mud/gas separator, atmospheric type.
9. One (1) Swaco desander.
10. One (1) Sweco dual 12 cone each side mud cleaner.
11. One (1) decanting mud centrifuge, Swaco Model 414.
12. One (1) set basic mud testing equipment complete with sink and cabinet located m ai r conditioned and heated mud engineering lab space.
13. One (1) t r ip tank complete with visual , mechanical and electrical fluid level Indicators.
14. Four (4) «1x1ng hoppers (2 - mud, 2 - chemical).
15. One (1) chemical mixer.
16. Mud storage and treatment pits consisting of:
Three (3) active pits - 625 BBL capacity eacn Two (2) active pits - 220 BBL capacity each Ono (1) slugging pit - 126 BBL capacity One (1) slugging pit 69 BBL capacity Ont (1) p i l l pit - 40 BBL capacity Five (5) mud rtturn/trtatlng pits 1QU BBL capacity aach
Total liquid mud capacity 3,050 BBLS
17. Mud pit .gltators 1n each of the active, slugging atd pi l l pits (total o. d ) . Mud pits equipped with both high and low pressure mud guns.
IB. une (1) 2,000 BBL capacity dri l l ing fluid bast oil stortge cank with pumps and piping to nud treatment area and supply boat 1 jading stations.
29. Ont (1) 2,000 BBL brine completion fluids tank with puaps and piping to mud treatment area and supply boat loading station'..
20. Dual standplpes and standpipe manifold, 5,000 psi UP.
21. Two (2) rotary hoses - 75' x 3-1/2" 10, 5,000 psl w? (10.000 psl t ts t ) .
22. Bulk P-tanks for barltt and cement service consisting of:
4 - 3,500 f t ? tanks 1n columns - 14,000 f t 3
(barite) 4 • 1,500 f t 3 tanks 1n columns - 6,000 f t 3
(cement) 4 - 1,000 f t 3 tanks on dock - 4.000 f t 3
(cement) Total 24,000 f t 3
23. Two (2) mud surge tanks - 70 cu. f t . capacity aach, mounted above mud hoppers. One (1) cement surge tank - 80 cu. f t . capacity.
24. One (1) cementing standpipe (15,000 psl MP).
25. One (1) PVT recording device 1n each mud pit plus mud return Indicator.
26. Ona (1) a i r condit Ioned/heated mud logging facil i ty as an Integral part of the mud return area with geologist office a.id oud engineers lab.
6
WELL C01TR0L AIP SUBSEA EQUIPtCIIT
1. On* (1) 18-3/4" x 15,000 psi WP suosea BOP stack consisting of:
Ont ( l ) 18-3/4" Camtron MC Collet ISM wellhead connector. TMO (2) each 18-3/4", 15M Cameron Type T double ram preventers with CX flanges, AX flanged outlets, wedgelocks, all ring grooves stainless steel lined. One (1) 18-3/4", IOM Cameron Type 0 annular BOP.
Four (4) each 3-1/16", 15M Cameron double cavity gate valves with subsea failsafe operators (one dual cavity valve below each ram). One (1) 18-3/4", ISM Cameron r iser mandrel. Guide frame for BOP stack Five (5) sets of rams as follows:
1 set blind/shear. 3 sets 5" pipe. 1 set 3-1/2" pipe. 2 sets 3-1/2" to 5" variable bore rams.
One (1) test/storage stump for BOP stack, Cameron 18-3/4" x ISM.
2. One (1) 18-3/4" lower marine riser package (LRP) consisting of:
One (1) 18-3/4", lbM CIW HC Collet r iser connector. One (1) 18-3/4", IOM Cameron Type D annular BOP. One (1) Cameron flex joint with r iser adapter. Two (2) eech Coflexip ball joint flex hoses. One (1) each Coflexip ball joint hydraulic hose. Two (2) each choke and ki l l Isolation valves. Guide frame for LRP. One (1) test/storage stump for LRP, CIW 18-3/4" x 15M.
3. One (1) Hughes Offshore guideline re-establishing system.
4. One (1) Cameron Emergency BOP recovery system.
5. MaMn* r iser joints consisting of 21" 00 x .1/16" wall X-80 Cameron RF riser In following lengths: / • ? . > * • "
31 ee. - SO" with syntactic foam buoyancy 26 ee. - SO'
1 ea. - 46' 1 ee. - 40' 1 ea. - 25' 1 ea . - 10'
Th* abov* equipped with two (2) each 3" 10, 15,000 psl MP choke/ k i l l lines and one (1) 2-1/2" 10 BOP hydreullc line and one (1) 4" 10 mud circulating (booster) Une.
• J#' ^ /
6. Ont (1) t t t handling and ttst tools for Carat ron RF r i s t r .
7. Ont (1) 21* x SO* stroke, sl ip joint , Cameron RF complttt with Rtgan Typt SOL support ring.
8. Two (2) 3" 10 x SS1 long ki l l and chokt 11nt droop hosts with stainless s t t t l outtr wrap/15,000 psl WP.
9. Ont (1) 30* Cant ron pin conntctor (to bt ustd with spart Cameron flex joint and r is t r adapttr) complttt with two arm guldt framt, five function hose r t t l , substa control host and necessary va lying for Its operation.
10. One (1) dlvtr t tr systtm consisting of three (3) tach 12" knife gatt valvts with hydraulic operators and ont (1) Rtgan KFOS dlvtrttr assembly, nominal 24* for 49-1/2" rotary tablt with support housing and running/handling tool.
11. Ont (1) portable 20M hydraulic test pump with chart recorder.
12. One (1) Cameron 3-1/16" and 2-1/16", ISM chokt manifold consisting of:
Two (2) 3" rtmott adjustablt chokes. Two (2) 2" manual adjustable chokes. Two (2) buffer tanks. One (1) choke control panel (dual control). Five (5) hydraulic valve operators on cr i t ical valves. One (1) hydraulic valve control panel.
13. One (1) BOP and diverter control system (fully rtdundant) consisting of:
Hydraulic pump units - 3,000 psl a1r/tltctr1c with BOO gallon reservoir, three (3) air driven pumps, two (2) electric driven pumps, master BOP and diverter control panel.
Accumulators • Sufficient accumulator capacity with both surface and LRP mounted accumulators to matt appllcablt regulatory requirements.
Two (2) 4,750' capacity air operated hosereels etch with low Volumttrlc expansion subsea BOP control hose (60 - 3/16" 10 pilot hoses and 1 • 1" 10 supply hose tach) for rated wattr depth.
Ont (1) 2-1/2" 10 x 55* Coflexip BOP hydraulic droop hose with stainless steel outer wrap 3,000 psl WP. (Connects to Integral BOP control supply line attached to the marine r iser . )
Two (2) eech - subsea BOP control pods with guide arms and female receptacles.
- 8 -
Ont (1) tach - D r i l l e r ' s control panel with controls for a l l BOP and d l v t r t t r functions Including back-up battery power.
Ont (1) tach - remote mini -panel .
Ont (1) IOO BBL glycol tank for ant i freeze protect ion.
14. One (1) NL Sha f f t r 1,280.000 l b . r i s t r tensioning systtm consisting of eight (8) tach 160,000 l o . , 50' t rava l chain tensloners. System Includes control panel, pressure vessels, air compressors/dryer units ard I d l e r sheaves.
15. One (1) NL Shaffer guideline and podllne tensioning system consist ing of six (6) tach 16,000 l b . 40' t r a v t l w l r tHn t tensloners. System Includes control panel, pressure vessels and Id ler sheaves.
16. One (1) Honeywell RS-902 acoustic hole posi t ion Indicator system.
17. One (1) substa TV system complete wi th camera assembly, lamp assembly, pan and t i l t and telescoping frame.
E . DRILL STUNS AND HAJBX1MS TOOLS
1 . D r i l l pipe 15,000 f t . to suit customer's requirements.
Standard Equipment:
10,000' of 6" 00, 19.50 l b . / f t . , Grjf l l_G, Range 2. 6-1/2" 00 -x 3-3/4" ID. 5" X-hole tool j o i n t s , boxes 2" LTS, f ine par t ic le hardband.
5,000' of 5" OD, 19.50 l b . / f t . . Grade S-136. Range 2, 6-1/2" 00 x 3-1/2" 10, 5" X-hole tool j o i n t s . ~
40 each, 6" 00 "Hevlwate" d r i l l p ipe. Range 2, 4-1/2" IF tool j o i n t s . —
Two (2) tach 6710715 ' d r i l l pipe pup j o i n t s . Grade S135. 4-1/2" IF too l j o i n t s .
2. Dr i l l Co l la rs :
12 • 9 -1 /2" 00 x 2-13/16" ID x 31 ' 6" long, 7-5/8" API Reg. connections, s l i p and elevator recess.
30 - 8" 00 x 3" 10 x 31'6" long, 6-6/8" API Reg. connections, s l i p and e levator recess, 7" hardbendlng.
30 - 6 -1 /2" 00 x 2-3/4" ID x l i ' t V long, 4-1/2" IF connections, s l i p and e levator recess, spiral grooving, 7* hardbandlng.
9
3. Two (2) 6" x 54* square kelly with scabbard.
4. Two (2) s t t s bit subs for standard bit sizes.
5. Two (2) sets crossover subs for Contractor furnished dr i l l string and down hole tools.
6. Four (4) Kelly saver subs (witn rubbers/throw-away type).
7. Six (6) each dr i l l collar 11ft subs for 6" and 6-1/2" dr i l l co l lars and two (2) each for 9-1/2" dr i l l col lars.
8. Test sub for kelly valve and choke manifold.
9. Two (2) TIM - safety joint, 6-1/2" 00 with 4-1/2" IF box and pin, 3-1/2" 10.
10. Two (2) , Gray-1ns1de BOP, 6-1/2" 00 with 4-1/2" IF box and pin.
11. Two (2) each, ITA6 upper and lower kelly valves, 15,000 psi UP.
12. One (1) Chlcksan, 6,000 psl circulating head 4-1/2" IF pin down/4" Dul I plug on top.
13. Two (2) Eastco Drift Indicators (non-d1 recti onal) complete w. > 1-5/8" 00 protective barrel and accessories Including 0°-6° and 00-12° angle units.
14. Fishing tools consisting of:
Taper taps and overshots Including accessories to catch contractor furnished dr i l l pipe and dr i l l co l l a rs .
15. Two BJ Type "66" center latch elevators (350 ton) for 5" OD d r i l l pipe.
16. Two (2) each, BJ Type SLA center latch elevators (100 ton) for 8" 00 and 6-1/2" 00 dr i l l co l lars . Two (2) each BJ Type SLX side door elevators (100 ton) for 9-1/2" dr i l l col lars.
17. One (1) eech, BJ Type S J , single joint casing pick up elevators for 20' , 13-3/8", 9-5/8", 7-5/8" and 7" T*C casing.
25. Two (2 ) . BJ Type SX side door elevators for 30", 20", 13-3/8", 9-6/8" and 7" casing.
26. One (1) set Varco SOO ton Type "SL-14" slip type combination e1evator/spid»r units with slips for 13-3/8", 9-5/8* and 7" casing.
27. Three (3) i f i ; I pipe,drill collar manual tongs (BJ Type SOO or equivalent) w .w. lug jaws for pipe sizes 4" - 17".
10
28. Two (2) 20" casing manual tong'..
29. Ont (1) Weatherford Lamb fedel 16,000 hydraulic power tongs ror running 13-3/8", 9-5/8" and 7" casing sizes complete with ont (1) Wtathtrforo LaaiO/Sk1d mounted hydraulic power unit.
30. One (1) Drilco EZY-TORQ, Type 1 c jap 1 ete with separate power unit.
31. One (1) d r i l l pipe spinner, Weatherford Lamb Splnnerhawk, Hotel 13,000 J-29 to handle pipe sizes 2-7/8" - 7".
32. e (1) kelly spinner, Internet-onal Tool Co. Inc. Model A6C-2 with 0-5/8" L.H API Reg. tool joints, box up/pin down.
33. Slips consisting of:
a) Two (2) sets Varco Type SDXL for 5" dr i l l pipe. b) Two (2) sets Varco for 6-1/2", 8" and 9-1/2" dr i l l co l la rs . c) Two (2; iets Varco Type CMb-XL for 20" casing for use with
Varco Type CB 20" casing bushing. d) One (1) power sl ips. BJ Typt MBS. t) One (1) set Varco model PS-16 air s l i p s .
34. One U ) set each BJ 3-1/2" x 144" (500 ton) and 2-3/4" x 132" (350 ton) elevator l inks. ,•..„ t - *^ t
35. One (1) each Baash Ross Type "C" safety clamps for 6-1/2", 8" and 9-1/2" dr i l l col lars .
36. One (1) each bU breaker for 26", 17-1/2", 12-1/4" and 8-1/2" standard br sizes.
37. One (1) mud saver bucket, OTECO "Mud Guard".
38. One (1) BJ Hughes lower pipe racker arm and carriage assembly with racker heads capable of handling 3-1/2" and 5" dr i l l pipe.
39. Two hundred (200) each dr i l l pipe casing protector rubbers for Contrector furnished 5 r 00 d r i l l pipe.
F . AUX I LIAIT EQUlPftlMT
1. Three (3) heavy l i f t ing capacity National Model OS-435 hydraulic pedestal cranes each with 120* ooom. Rated capacity each - 32,500 lbs . at 120* maximum radius.
- 47,500 lbs. at 90' radius • 77,500 lbs. at 60' radius - 167,200 lbs. at minimum 30' radius
Whip line maximum load (at al l radii) - 15,600 l b s .
- 11
2. One (1) f r nipt and casing handling systta consisting of ont ( l ) S8' spar 4 crant with two (2) lb ton hydraulic hoists and cor-rtspo- t s .
3. BOP handling systta c o n s i s t ' o f ont (1) Nor-Mar 230 ton slnglt place BOP carrier (enables handling and testing ot ?0P/LRP assembly In one piece) and auxiliary 200 ton overhead crate.
4. Six (6) Wartslla Vasa 6R32 6 cylinder diesel uiln tng1 nts tach rattd at 3.020 continuous BHP at 720 rpm, a..u eacr powering one (1) 2,500 KM alternator.
OC power for rig service p. ovided through a AC switchboard and Gene n l Electr ic SCR drive system. (3,500 AMP SCR nMdgts).
5. One (1) auxiliary Cummins diesel , Modtl Ft"! * .ewerlng ont (1) 900 KU alternator.
6. Three ( 1 * * e r a l Service rig a i r compressors, earn 650 CFM at 125 psl com- lata with air drying system to - 40°C F IP.
7. Two • ' , cold sta»-t air compressors (1 diesel driven and 1 e lectr ic dr1*en ;.
8. Two (2) bulk air ccmpressors, each 600 CFM at 40 psl complete with refrigerated dryers.
9. Two (2) N1rex potable water d ist i l la t ion units with total rated capacity of 20,000 G?D.
10. Electric heating and air conditioning systta 1n al l living quarters and offices of Drilling Unit.
11. Pollution control equipment consisting of one (1) sewage treatment plant, one (1) oil/water separator and two (2) portable waste oil disposal tanks to mitt IMO/Marpol rtgulations.
12. Four (4) personnel elevators 1n columns for access to pump and propulsion rooms and one (1) personnel elevator on dr i l l floor to racking board and crown block.
13. Welding equipment consisting of two (2 ) 300 amp AC recti f ier units and one (1) 400 emp diesel driven unit.
14. Radio communications and navigation equipment to meet U. S. Coast Guard and SOLAS requirements Including:
RF Harris RF-230 SSB radio 160 M RF Harris RF-230 SSB radio IOOO W Collins aircraft radio Alden Marlnefax IV Weather fax Southern Avo1n1cs Radio Beacon SS800A
12
Scientific Atlantic COMSAT unit ITT Hack ay MRU/30 coaplttt ships station i n Hack ay EPIRB ITT Mackay Modtl 401 Lifeboat Radios Motorola 55/75 VHF radios - (aight (8) each for use In cranes
and for moves and anchor handling).
15. One (1) computerized rig monitoring system consisting of a d istr ibuted data collection systea connected to a multitask host computer with terminal, 'displays) 1n toolpusher's off ice, ballast control root and machK.tr/ ho.;» . Data collected and displayed at the terminal locations \ n r : . U t engine room data, dr i l l floor data, tank storage data, environmental data and rig motion.
16. Ont (1) closed c i rcui t swltenable TV monitoring systea with monitors locattd 1n toolpushtr's off ice, operator's office, pilot house, dr i l l floor and other key areas. Cameras are located to view helideck, cel lar deck, port/starboard supply vessel loading stations as wtll as subsea operations.
17. Fireflghtlng tnd lifesaving equipment to mttt ABS tnd U. S. Coast Guard requirements including:
Two hundred four (204) each personnel survival su i ts . Four (4) Watercraft covered lifeboats, S8-man, each.
18. One (1) New-Mar helicopter refueling station consisting oi cabinet, f i l te r weter separator and one (1) fixed 2,000 gu. storage tank.
19. Two (2) Br i t ish Rope "Viking" boat mooring systems - one (1) each for port and starboard supply boat loading stations.
20. Two (2) Well Test Burner Booms, 75' long of triangular tubular design located approximately 48' above sea level at the 80' operating draft. Booms are complete with necessary o i l , gas and u t i l ity Hnes, but without burners. Burners to be provided by Operator.
21. One (1) trash compactor complete with disposal bags.
22. One (1) fo rk l i f t , diesel powered, for handling palletized and other material.
23. Limited H2S detection and personnel protection equipment consisting of:
a) One (1) H2S gas detection and alarm system with fixed sensors in bel lest control room, dr i l l floor, upper deck air conditioning e l r Intake, mud return area (2) , cellar deck area (2) , mud puap rooa and cement rooa. Systta coaplete with required warning horns and rotating red/yellow Hants.
- 13 -
b) Twenty-five (25) - #9838-20 Surviveir, 30 m1n. breathing device (Pressure Demand)
c) Six (6) - spare 30 min. Surv1va1r bottles (Pressure Demand) d) One hundred five (105) - 5 m1n. Surv1va1r escape packs e) Twelve (12) - 5 m1n. Surv1va1r recharge kits f) One hundred five (106) - Oelmar personal M2S detection samplers j) One (1) - Monltox 5-pack with gas generator and spare parts n) Two (2) - 701 TAX portable H2S portable detectors 1) Two (2) - Oxygen resuscHators, dual patient type
(note: Above H2S detection and protection equipment sufficient for closing 1n well and for personnel evacuation only.)
THIRD PARTY EQUlritlUT
1. One (1) Halliburton twin HT-400 diesel cementing unit wise 3.17 cu. H (20 BBL) tanks, driven hy two (2) GH 8V-71 engines with recirculating mixer. Fluid ends rated at 16,000 psi UP.
2. Batwh mix tank - 100 BBL capacity comp.ete with electric agitators, and electric pumps to feed HMOO.
3. Liquid Additive System: - Four (4) liquid additive pumps and holding tanks. Tank capacities are: one (1) 1,500 gal. tank, two (2) 750 gal. , and one (I) SOO gal. tank.
- 14 -
COASTAL ZONE MANAGEMENT
CONSISTENCY CERTIFICATION
Exploration
Type of Plan
Ewlng Bank Blk 828
Area and Block
OCS-G-12133
Lease Number
The proposed activities described 1n detail In this Plan comply with Louisiana's approved Coastal Management Program(s) and will be conducted In a manner consistent with sue', Prograrn(s).
Arrangements have been made with the State-Tines 1n Baton Rouge, Loul lana, to publish a public notice of the proposed activit ies no later than July 31, 1990. Additionally, arrangements have been made with the Dally Comet in Lafourche Parish to publ 1 sh a public notice of the proposed act iv i t ies no later than July 31, 1990.
Chevron U.S.A.Inc.
Lessee or Operator
Cert 1 fylng Official £ 7
5^%ate
P2F464
000000000000000000000000000000000000000000000000000000000000000000000000000000
Public Notice of Federal Consistency Review of a Proposed Exploration Plan (POE) by the Coastal Management Division/Louisiana
Departnent of Natural Resources for the Plan's Consistency with the Louisiana Coastal Resources Program.
Chevron U.S.A. Inc. Attn: 0. M. Paschke
Environment, Safety, Fire and Health Division Coordinator
1515 Poydras Street New Orleans, LA 70112
Ewlng Bank Area Lease OCS-G-12133 Block 828 Lease offering date 04/90
Proposed Plan of Exploration for the above area provides for the »XJ1 oration for oil and gas. Exploration activities shall inclvde drilling frr i a jack-up rig and transport of drilling crews and equipment by helicopter and/or cargo vessel frcn an onshore base located at Leeville, Lot siana. No ecologically sensitive species or habitats are expected to be located near or affected by these activities.
A copy of the plan described above 1s available for Inspection at the Coastal Management Division Office located on the 10th floor of the State Land and Natural Resources Bldg., 625 North 4th Street, Baton Rouge, Louisiana. Office hours: 8:00 a.m. to 5:00 p.m., Monday through Friday. The public Is requested to submit comments to the Coastal Management Division, Attention: OCS Plans, P.O. Box 44487, Baton Rouge, LA 70604-4487. Comments must be received within 15 days of the date of this notice or 15 days after the Coastal Management Division obtains a copy of the plan and It is available for public Inspection. This public notice 1s provided to meet the requirements of the NOAA Regulations on Federal Consistency with approved Coastal Management Programs.
Applicant:
Location:
Description:
000000000000000000000000000000000000000000000000000000000000000000000000000000
P2F455
CHEVRON U.S.A. INC EASTERN REGION
CENTRAL DIVISION
Critical Operationt and Curtailment Plan
Personnel saiety and environment*] protection have highest priority whan conducting any operations. Preplanning and work scheduling ara mada with fJwjee factors in mind.
Chavron recognizes tft* oflshore operating haxarda and tho possibility of marine environment contamination. Every effort vill ba made to minimize the pollution possibility and to provide maximum saie working condition* for alt personnel.
Liated below are operationa wtiich ara considered to be criticaL
1. Shallow Driilint Hazards - A shallow drillint hazards report will be submitted aa reouired in Sec. 2 J ot1 OCS Order 2. Upon encountering shallow hazards, wall will be controlled in accordance with Chevron4! USCS sppiuied "VaU Control and Blowout Prevention Guide".
ne ^! >jjj t nyf m t A o m w U 1 te c o n d u c M d M
outlined in Chevron's Mumpso Operationa
EBB 2$£fti£FJ£3l Vl bottom tatting drilling units will ee secured oy uae os earner cement, or BOP closure. If possible, whon necessary to r
3. Movine Drilling g|aj Or and Off Locations in Emetranciet - Ploatar rip and hurricane plugs,
closure, If possible, whan necessary to move rig of 1 toi emergency conditions.
e. Teat ina of Blowout Prevantors - Drilling operationa will not proceed until sueh tin* at the blowout ptwventor stack hat baan completely and successfully tatted in accordance with Sac. 3.7 of OCS Order #2.
5. Weil Kicks - After eapariencing a wel! kick, drilling operations «haU not be continued until such time ea the wellbore is stable, safety overbalanced, and property conditioned, kn accordance with Chevron's USGS epproved "Weil Control and Blowout Prevention Guide".
monitored during the leet trip in the bote with drill pipe prior to running caaina,.
b) The mud weight shall ba determined to ba adequate to oentral formation pressures in hole which is to be cased oft.
d iht weii wiU ba checked tor rvtrmal hate flltup and mud Plop secernent on trip out of hose with conditioning assembly, and while going in hole
d) Plow lane returns will ba rrwutored while circulating or e) if e casing string sticks befora reaching tha desired depth and cannot be
freed, plans ara to camant tt In piece, end notify proper USCS authority.
CHEVRON U.S.A. MC EASTERN REGION
CENTRAL DIVISION
Critical Operations nd Curtailrnont Plan
P***cnrwU safety and environmental prottction have hlgheat priority when conducting any oparatiora. Prwpiaraning and work scheduling ara mada with that* factors in mind.
Chavron rerjoajaaeo vat ofiahore operating hazarda aaai vat poaaibility of marina environment contamination. Every effort will ba made to minimize the pollution pcaeibility and to provide maximum saie woridng caatalttorat for ail
Liated below art operationa which ara oonaderod ta ba criticaL
1. Shallow Drttline Haaarda - A aruulow drilling ruucardt report will be submitted at reouired in Sac U of OCS Order 2. Upon encountering shallow hazard*, well will be controlled in accordance with Chevron* USGS aeproiid "Vail Control and Blowout Prevention Guide".
wiU be
3. atoviae DrUlina Rjea On and Off l ^ k w a In Enwaonciat - neater rip end bottom setting; drilling units will be secured by uaa of either hurricane plugs, cerftent, or iOP cioaure, U poaaible, whan nacaaaary te move rig off in emergency conditi one.
Tart Ina of Blowout Prmremort - Drilling operations will nat proceed until such time aa the blowout preventor stack hM bean compieteiy end succaeafuily totted
with Sac 3.7 of OCS Order #2.
a.
3. Weil Kickt - After axpariancing e wail kick, drilling operations ahall not be continued until such tima as the welBisra bt stable, satiety overbalanced, and property conditktnad. In accordance with Chevrorrt USGS appro.'id "Well Control end Blowout Presenile** Guide*.
e. Rurrtua a,id Ceaaantirg Cat tnt • 2 T h e wall ia ta ba carefully monitored during the laa* trip in the hole with
drill pipe prior to running casing. b) The raud weeght shall be determined tu ba adtavail to control formation
arauurea in ratio which ia :o be caead off. c) The weal will ha chocked for raatnal hole flltup and mud iaplacamisnt on
trip out oi hate with captioning numbly, aaai while pang in hate with caaang.
d) Plow una rwturna will bo monitored while circulating or camaming. t) U i eating rtr Ing ttickt belore reaching tha daaired dapth and cannot be
freed, plana era to cement it in place, end notify pup si USGS authority.
DRILLING F-'-TD CCMPOSITION
Fresa Vacs:. 3eaconice. Same, Caeaicala Sal: Vacer. AKxnlugtte C a r , Sar.ca. Cieaicaia
F:eaa Vace? tad/or Sale Vacer VCar Sa Uses
ensure.*/-! a ADcrrrvis Bartea - Sanaa Suiface Bea coa tee - Sodiua HontaorJloaice Car Arcacuiritt Car L i s a - Calciss Svdroxrae Cauarx Psuta - Poroasium Hrarcxide Chroma Lifscr-u'enace Ligatca Soda Aaa - Sodiua Carbonate Sodiua 3lcx::oaaca Sodiua Acu ?7rapacteata (SAAP) Gareoxr UetSTlcellulota (CHO XCO - Xaacsa Cue Polymer PAC - Polraaioaic Cellule te Cora Seared G dtonice - ?.asa Cexca Csusit: - Non-ionic Veet'og Agenc Defoaaer - Non-ionic Surfactaac GUaa 3 eadt Gausce Sect - Sodiua Hyeroxide
AdOO 318tfllVAV 1S38
- L O S T ; : & C T , A T : O N MAT3F.LA.L3
Mica Valou: Shells Celloeaaae Fares Fiber
Diesel Oil Pipe Lax ' V - Blend of Surfactants. SaaUlflert 6 Vecttag Agents Versa Vet - Surfactant: Vecctaf Agent Versa HX? • Car Exteader
All liquid BtUi will de elscosed of la csapliaaca wtca EPA ree.utrer.eacs
n e««rt^e»»t "f th* Interior July 10, 1990
Bwing Bank Block 828
L E A S E STIPULATION"
Stipulation No. 1 - Cultural Resource, a hazara survey has heen file* for rhe leaae.
Stipulation #2 - Warning Area W-92, contact will be m*de with the Naval A<r Station.
UNITED STATU DLTARTMirn or THE IN TERROR
MINLRALS MANAGEMENT tERVrCt
Outer CoMlMfiul Shot'. Control G O * of Mt ale* CM ind C*t LOOM OfTtrtnt (May IMl )
STIPULATION NO I • CULTURAL Ht SOC RCE OCS-C 5 9 1 1 >
II iht Retwnel Manager (RM i h*« reeaon ie NIHw UMI • UM, MflKiwt, er ohMct •* hfctortcol or erchetoioeicel utrnftcence heremafirt referred 10 M "rultoral iwoww," My t«. i ta UM tear** i m IM) gnat ik* tatare written ootkt lhal Iht tataor • enfarctat MM pi 0< MM at of I Mi MifaliiMii. IIM MMM tho*. up** receipt of each notice, cotnory MRR iht fetewicn, recMereetenu
i l l Prior IO aay drilling ertrtriy or I ax tenet rotttan of plecamint of eny itrvc tort for »» pie ratten or drvatoemeai on lho loot*. UK nnt Inf SMI aot IbnMed lo well drtUmt and ptaetme ond platfonn ebtamiat. teiltaofMi ta too iimvJei " referred 10 ai "ofvrtiron." ina Maaa* otef eotenrt rornolo Mrtaint oarvryi and or praport a report, aa oROCSftMl oy OM KM. to deter-MMM ina potential tkitienre of oay roll oral roonwci UMI may ba effected by audi operation All data prod-cod. oa orof oa ether porttaont natural and J ^ c cultural eewbenriM,,iaJ data dull te etimtaao1 by on witeictaatol ond \ J eoeahvaarov determine a* ind • r • pi oaa ax eapjettina. lha cateiati of a cultural reeaurce thai ttat) * affeciod by any MOM operation A report of ouch aurveyt and naporod by an orchoeoaaoiai and geephyekiei ahot te tabrnitir a io the RM
121 If earn cultural reeaaree iiteVeiort are preaent. lho Maaoe abet- loi taenia lha aM a of the Moot oporo'ton ao at noi lo aff act odvorarf) the nVntflad taea-itan. ot tbl eat ah nah to ite uinfacttan of the RM. oo Ihe bote of farther eicheeoMgerel n.veeiejetmn conducted by oa Mlhcictaftol and poophytetal uwng inch aurvey ««,un»mem ate irchneauea oa deooaed at eaten by Ite RM. either that aoch operatMn will noi adver.. ry effort the ta oaten tdentr-rtad Of UM* the poitniMl cultural reaootaa mpjaaiod by the occurrence of lha mdieatort doea not earn
III A report of lhe tatter invcwifjiMn prepored by ihe Mtteootafhi and pre-phywrbi thol be aybmttied to lha RM for itetao ShooM ite RM determine thac the eahieitcc of a cultural reaoarre which anoy te edvereaty off act ad by each operatMn la auflVMntry coMbathed to wotrona proaariMn, tht hmee ahaU take no action that anoy rente ta on adverae off aei on aach cultural reaooKO until the •Jd, tea shoo direction oa to Ha pi aaaa tton
In edd it run. the taaore afreet thot If aay met oral reaource a W I be 4h> covered darn* the conduct of ony opaiaataa oa the taeeed am. be atel repon vnanedMiery aurh faMtaft in the RM end make every rotM noble effort to prelect the cultural rooa araa onill tho RM |>et direct Men aa io te ptwMcttua
STIPULATION NO 4 WARNING AREA W*a
RoMRW/enka
WhaihM tempenwtten for aach deenefe or injury m«ht bo due under o theory of alrtrt oa ebee-lutt liability oc other.Ma the leaaae aetoenoa ot rtahaof 4 em ana oa tajary M paranaa or property, which ocean ta. on, ot above ihe Outer Coniinenul Sheaf, io any poraona or to ony property of aay peraoa ot poroont who eat eeante. trroytayroe. or tavReee of Wat taaaae ha aajenta. tade-pendani controctort. oe anbronwocton dotej baotaaoi with Hw taaore to tonne ti Mo »tth any ant* it in beta* orrfoewwdl by the Wove to. on. or above ate Owh» CaattoeaMi Sheaf, e* each tajary or damage ta each perton or etoeerty errata by itooan af the anMttat af any Anoocy af the I S Government. Ita conirarton or tubceatrecteet, ot ony of tho* offkron. anenu ot env
treet. brin| conducted oa • port of. or to loaactliaa wRtt tha aroa/ema and otoVtataa of lhe al Ah StttMn. Mo* Oitiana. Uatatano.
Nemiibatondtaa any temrutten of the leaaae i Kohenty to aacttaa 14 of tht taoot. ihe taaaae nnwawt Ont rich whether each tafary ot 4am not la ran aad In whole or ta port by any a« or —ItTTf n ['acr i l l at i f nioparr ' - " Stow. M* c^ottnttort or cabcaterottera or aay of ht offWera. a«antv ot nowWyeoe. Tte taaooo rtether aareea lo toiwaniy owl ane terantea tte United Stoiaa aaotaot ol clatea fot taaa, lamojc. ee tafery mauinad by Ow taaaoa. 'nd M MdemnaTy oae) aave harmtoM the UnUte Suit* am law al cttteo for toot, ataanoft. or
tatary laeMtacd by it* aaoaM. ooanmyoo*. or taifcttt of tlM BMPO*. mm tmm**. et aay I coatrecteaa •* aebceetrortero nteejbj mmmm »H* MM Mam ka ctaoMcitaa aa "> the i •<M ti ill Mtoi al the miimatMaatj eaajtery taetaotftaa. •bother the tarn at coated M who* oc k eon by the iltaii i ae fan* af OM U aired lama. Ha contract***, te temcabtecooia, at eay ef Mt efTken. await, ae eenntayooe mm mmmm ear* ctataet eMaht IM nmaened aame t tlMory of eerki at t t a w a lMbth> at ••are Mi.
aad lime of at) eneau. ea> tan frees aai r* Wool deeej-•y MM nn i In of the
f MH. PetMrtaeeat af Oof e m flbght. ittiMg at eaajiatMaal oetMMMe. nadatied -IthM ktai'rdnel e. noted «arataf mat. Niteewn MiaMettjej control. t-M coordtaeitao a m ike Mem. bh me.*, lenataycaa, Mara . enttamnVa* aaa am Mr* ar enhiaatretMae. oral ha effected hy the raamaamr af the aaa >etMM tmhtm amtary tantelnitea reafriehnj opere, tern m tb* eonknfer •ocemj area, pent Mat. benom. that coertrel af each HactroeuaiMik reaaat thai in no nrverm ptahath aj e a r n af ihiiiimtaihh: iinmcaltataja durkej try pened of rim botaooo a Maaae. at mate imhyata, a*n liana. Mt aaa reta at •abfaatnttert aat eaehera foe art Ma.
The Mam. •hea oporotena cw caaakej ht he ie I mm ka behaaT, boot oe ear croft traffic bate the mdttajuei cjeaajaaietl *entaoj areaa rhafl eater tart a j ramai wkh tha aeamaraiar af ihe w 4nMoei command h coon oar ten Ikied aheet. ao attMtaa aa traikajaol deaejnetod Moment area prior 10 coamerMtag »uch iraffk tach on aareomni nai pre* Me fat peek tec conirol of boaia and a trt re/1 operants, into the atmln| erect al at item.
s
ENVIRONMENTAL REPORT (EXPLORATION) EWING BANK BLOCK 828 (OCS-G-1213 3)
LESSEE/OPERATOR: CHEVRON U.S.A. INC.
18 Jun* .990
CONTACT PERSON:
Ms. hirlsy A. Rondsno Technical Assistant Chavron U.S.A. Tnc. 1818 Poydrar s t iaet Nr* Orle-ns Louiaiana 70112
Talaphona: (504* 569-729
DMOcIPTIQN OF THE PROPOSED ACTION
This Environmental Report addresses the proposod d r i l l i n g
act iv i t iee related to f ive exploration walls in Ewing Bank block
'•fl by Chevron U . S . A . , I n c . , leaaaa end oparetor. Tho center of
the block ia located approxlaetely 78 a l io s aouth of Leev i l l e ,
Louisiana, st which io located the onahoro support base for tha
act iv i ty . The nearest mainland ahore ie located approximately 64
a l io s north near Timbalier Bay. The location of Ewing Bank block
828 in relstion to the Louisiana Cosstal Zone ie shown in Exhibit
1. The locations of the proposed exploration wells within the
block are shown in Exhibit 2.
As ststed in tho oxplorstion plan and geologic prograa for
Ewing Bank block 828, there w i l l ba f ive wells d r i l l e d . Tho
coabined depth of the wel ls w i l l be 53,000 f t . TVD ( t o t a l
vort ical depth) . I t I s projected to take an eetiaated 400 days
of d r i l l i n g to coaplete the f ive wo l s . The w e l l s w i l l bo
dr i l l ed froa the semi-submsrsible d r i l l r i g "Ocean Aaarican" in
approx lae te ly 510 foot of water . Provided t h e r e aro no
unforeeeen delays, oxplorstion ac t iv i t i ee for Ewing Bank blook
•28 wi l l begin in A p r i l 1991, and bo coapleted in Nay 1992.
The onshore oupport base for the oaplcration of Ewing Bank
block 828 w i l l ba L e e v i l l e , Louisiana. No now f a c u l t i e s aro
envisionsd in re la t ion to thia act iv i ty . Exist ing f a c i l i t i e s aro
anticipated to b«i s u f f i c i e n t for a l l aupport ac t iv i t i oo . No new
• area.
workers sre expected to be employed for t h i s a c t i v i t y as an
ex i s t ing d r i l l r ig and crow wi l l bo u i l i z e d . The f i r s t socio
economic dsta baae report w i l l be submitted when the MMS and the
s t a t e s of Alabama, Louis iana , and M i s s i s s i p p i i d e n t i f y tho
s p e c i f i c parameters to be sddrsssed in those semi-annual reports.
Ths surfses t rava l route between the propoeed well a i t e s snd
the support bsse w i l l be by Bayou LaFourche through Fourchon Paaa
and into the Gulf of Mexico. The a i r route w i l l be a straight
l ino to Ewing Bank block 828 froa Leev i l l e . Two surface vessels
and two helicopters w i l l normally be employed in eupport of this
a c t i v i t y . A crew boat i s exported to make 4 round t r i p s por week
and a work boat i a oxpactod to aake 7 round tr ipe per week. Tvo
halicopters w i l l make a total of nine t r i p s par week.
Uo new or unusual technigues or technology that aay af fec t
coas ta l waters w i l l bo usod in th.s sxploratory d r i l l i n g program.
Dua to the wildcat nature of the d r i l l i n g prograa, no development
or production plsn has baan formulated at th i s t i a a . At tha
a p p r o p r i a t e time ( a f t e r the e x p l o r a t o r y p r o g r a a ) , e
development/production plan giving tho proposod meana and
l o c a t i o n of gaa and/or o i l tranaportation f a c i l i t i e s w i l l bo
praaanted.
2
E W l U m g . . ?T TWT, A m .TBI? lalYIiWLmTnT ftWR ™ ° - ^ c
a. Physical and Environavantal
(i) cnmairiilii riih.nq Data praaantad in Fisheries ot tha Unitad Stataa 1980 for
t h a Gulf of Mexico region shows Ewing Bank block 828 to be
located neer a productive fiahing area. The mean yearly catch
f o r the area north of the block waa 27.5 mil l ion pounds (combined
f i n and shel l f ish) for the years 1986 through 1988. The aajor
f i shery in the area ia menhaden (Brevoortia patronus) . The moat
common s p o r t f i s h csught in ths s r s s i n c l u d s k ing msckorol
(SCPrttrgBQrVl c s v s l l s l . crave l i e jack (CajaWl hj^nfls.) , wahoo
(ACinthpCYblUfl • Q l a n d T l , , snd dolphin fCorvohsana hlppurui) .
Commsrcially important epociea of shrimp, the aost common
b e i n g brown shrimp (Penaeus a z t a c u s ) and white shrimp (P_*.
s o t i f s r u s ) , are taken in the v ic in i ty of Ewing Bank block 828.
N e a r l y 92,900 tons of shrimp wsrs c o l l e c t e d by commerciel
fishsrmsn ln 1988 in the Gulf of Nexico, thus providing fishermen
with sn abundant aconoaic rssourcs.
Najor oyster grounds era located north of Ewing Bank block
828 in the inshore watere of Lafourche P a r i s h . The nearest
reported grounds aro approximately 64 a l i a s north of the block in
Lafourchs Parish.
Iapacts to th* offshors f i shsr ies w i l l rssul t froo loss of
trawling araa for f i sh ing voaaals dua to tho physicsl presence of
tho eguipment and a decreaae in weter qual i ty in the immediate
a r e a of the r ig from the diacharge of d r i l l i n g f l u i d s and
cutt inga.
The d r i l l i n g r i g w i l l pr .nmercial fishermen from
using one to two hecverws r f bonto* .ring tne d r i l l i n g period.
Discharge of ueed d r i l i s and cut t ings w i l l decreaae
wator quality causing commote ly important apeciee to avoid the
immediate area. Aa che cuttings and mud p a r t i c l e e s e t t l e ,
t u r b i d i t y w i l l d iop snd t h i s s h o r t term impsct w i l l bs
a l l e v i a t e d .
Treeted sanitary waate, produced waters, r ig wash, runoff,
and desa l in i za t ion wests s r s to be d i schsrgsd froa the r i g .
Those discharges should not s i g n i f i c a n t l y a f f e c t commercial
f iah ing ae ths volume of weter io so groat r a l s t i v s to the volume
of affluent that d isparaal w i l l bo rapid .
(2) sajii craft Pitasuri testing, st^rttlihlnq and Rtcrtfltivn Ewing Bank block 828 is located 64 a i l e a froa the nearest
mainland shore. Bxplorat ion in t h i s block w i l l probsbly not
a f f e c t recreational boating or sportf ishing due to i t s distsncs
offohore. Temporary loos of one to two hoctaroa for fiahing w i l l
ba incurred during tho d r i l l i n g per iod . Thia iapact w i l l
B I :
terminat" rfhen the d r i l l i n g operation i * complete.
The d r i l l i n g r i g w i l l present a s l i g h t h i n d r s n c s to
navigation for f i sh ing veesele. However, the r ig 'e presence in
the araa w i l l serve aa a safety fac tor for vaaeela needing
emergency help and aa a reference point.
Recreational beaches are found along tha coaat of Lafourche
and Jefferson Pariah in Louisiana. The nearest beach ia located
approximately 64 miles to the north of Ewing Bank block 828.
A t r a j e c t o r y a n a l y e i s was p e r f o r a e d for an o i l a p i l l
occurring at Ewing Bank block 828 u t i l i z i n g the hypothet ical
simulation presented in the Draft Environmsntal Impact Statement
for the Gulf of Mexico Lease Sales 123 and 125. The analysis
indicatee that the leaae in question ia located in Launch Site 42
and that the probabi l i ty of a a p i l l reaching the Louiaiana ahore
in 10 daya ia 2% for Land Segment 16 (Terrebonne Pariah) and 1%
for Land Segment 17 (Lafourche Pariah) . However, the westwardly
flowing current s and winda would a i g n i f i c a n t l y e f f e c t the
possibil ity of s p i l l e d hydrocarbons froa reaching ahore.
Dieturbence to hunting and f iahing in the coasts l sons by
hosts and helicopters servicing the operation ahould be minimal
in an already much traveled area.
5
O) snipping
Ewing Bank block 828 ia located approximately 7.5 miles
north of the nearaat aafaty fairway. The walla located in Ewing
Bank block 828 w i l l be marked with l i g h t s to warn commercial
t r a f f i c of i ta presence, and are therefore, expected to heve no
s i g n i f i c s n t iapact on commercial t r a f f i c in the Gulf of Mexico.
(4) Cultural Reaourcea
Ewing Bank block 828 I l ea outside the area designated aa
l i k e l y to yield valuable cultural resources. A shallow hazards
review has been f i l e d for by Chevron U.S.A. Inc. There are no
known shipwrecks within the block. The closest known shipwreck
i s located approximately 34 ai lee northeaet of the center of the
b lock . No a i g n i f i c a n t impact i a expected on any c u l t u r a l
rooourcea froa the d r i l l i n g act iv i ty in the block.
Available inforaation ahowa that block 828 occura in an area
with a mud and aandy mud bottom. There are no known seafloor or
subsurface gsologic and man-made features or conditions that aay
advorssly affect the propossd operationa.
(5) Ecological lv Senait ive Featuree
The marah-estuarine ecoaysteo inshors froa Ewing Bank block
828 i s very productive. The extensivs marsh-estuarine systsms
along coaatai Louiaiana are ut i l i zed in the l i f e cycle of the
important commercial f i s h e s and s h e l l f i s h e s of the region.
6
Typical eatuarina dependent, coaaercially important specie* auch
aa shrimp and menhaden spawn offahora and aigrate to the Bai t -
marshes aa poet larvae where they spend the juvenile etagee of
the i r l i f e hiatory.
Although there ere eeveral wi ld l i f e refugee and management
areas found along the Louisiana coast, none are located in the
the immediate area of Ewing Bank block 828. The closest refuge
i s ths Wiener National Wildlife Area located approximately 65
miles north of the Ewing Bank block 828.
Two areaa of biological significance l i e within 50 miles of
Ewing Bank block 828. Theee areaa are the Diaphua Bank located
approximately 28 mi l e s to ths weet eouthwest and Ewing Bank
located approximately 45 milee weet of the block. Both of theae
faaturea are ra ised areaa of tha Gulf bottoa which may a t trac t a
variety of plents and/or animala. Due to the distance between
the block and tha biological ly sensitive areaa, i t i a unl ikely
that the d r i l l i n g a c t i v i t i e a w i l l have any a igni f icant iapact on
theee areaa.
Moat of the aa jor oyater areaa in Louiaiana are locat* in
aouthern Terrebonne Pariah and eaatward. The closest prod
oyater beds sre l oca ted in Lafourche Pariah approximately 64
miles north of Ewing Bank block 828.
7
Watar quality i a affected by sp i l l ed o i l . I f an o i l a p i l l
occura, there vould ba a potent ia l adveree e f f e c t on aarine
maaaale and birds. Birds have been eerioualy affected by o i l
a p i l l a in other parte of the v o r l d , but there haa been no
reported avian mortality froa o i l a p i l l a in the Gulf of Nexico.
The saae i s true of aarine mammals, although aoat apeciee
recorded for the Gulf of Hex.'-o are actual ly very rare . Oi l
s p i l l s in the open Gul f do not v i s i b l y a f f e c t the a a r i n e
invertebrate fauna. A aaall organism auch aa a copepod, vould
surs ly bs k i l l ed i f i t encountered sp i l l ed o i l , but the amount of
vater involved ia ao great, thet no known quantitative sampling
prograa could detect a population change.
In the unlikely event that sp i l l ed o i l vere to reach ehore,
some impact would occur on the shaliov vator biota. There ia a
amall possibi l i ty that any liquid petroleum hydrocarbona vould
reach ahore for tvo reaaone. Pi ra t , Ewing Bank block 828 ia a
s i g n i f i c a n t diatance offahore. Secondly, the predominant
c u r r e n t s in the aree move v e a t v a r d l y and. the v inde are
predominately out of the east to southeast . Ths impacta of
d r i l l i n g , there fore , on eco log ica l ly s e n s i t i v e areas in ths
coaatai zone are expected to be ins ign i f i cant .
(6) Existing Pipelines and Submarine Cables
There are no knovn o i l pipelinea or submarine cables located
in this block.
8
(7) othtr Hlntral Pits Sulphur and s a l t , tvo import*nt miners l s axtractad froa
c o a a t a i L o u l a l a n a , a r a not k . v.n to occur in commercia l ly
feasible locations and/or amounts within th i s block.
(8) Ocean Dumping and Related Act iv i t l a s
A general National Pollutant Diacharge Elimination Syatea
(NPDES) permit for the discharge of d r i l l i n g f lu ids and cuttings,
desslinization plant wastes (concentrated sea s a l t s ) , treated
aanitary waste, r a i n f a l l runoff and r ig washdown water was isaued
by the EPA Region VI o f f i ce . The permit covere discharges in the
Federal OCS weat of lat i tude 87° 41 1 with the exception of
certain environmentally aenaitive areaa. A l l discharges froa the
Chevron d r i l l r ig w i l l be in accordance with the proviaiona of
t h i a perait.
The aejor e n t i c i p a t e d diachargea from the propoeed f i v e
exploratory wells w i l l be used d r i l l i n g f lu ide , cuttings, snd
formation watere. Uaing the estimatss preaented in the Draft
Environaental Iapact Stateaent for the 1980 Oi l and Gaa Leaae
Salee A62 and 62, Voluae 1, page 69, for a 15,000 f t . well , the
eat iaated 53,000 f t . aeaaured depth of the hole for the f i v e
w e l l s w i l l produce approxlaetely 389 tone of conmercial aud
coaponents and 3, 357 tone of d r i l l c u t t i n g a . Deck drainage
volumes v i l l depend on local r a i n f a l l amounts during the d r i l l
period. All deck drainage wi l l be treated to assure that i t
9
S T B I M L B .
meets EPA requirements. As stated in the Draft Environaental
Iapact Statement for Gulf of Mexico Salea 123 and 125, aoae
components of d r i l l i n g fluids are known to be toxic to certain
organisms. The use of freshwater based d r i l l i n g f l u i d s w i l l
introducs into the marine environment re la t ive ly non-toxic d r i l l
cuttings and formation waters. The disposal of these materials
at the r ig location can be expected to cause low level localized
adverse impacts on both bottom communities and water qual i ty
immediately adjacent to the r ig . A more complete discussion on
the impacts of d r i l l i n g f luids, cuttings, and formation waters i s
presented in the DEIS for Gulf of Mexico Sales 12 3 and 125 on
pages IV-22 through IV-24. Theae discussions cover impacta on
the OCS areaa primarily. The primary impacta of the diapoaal of
dr i l l ing f lu ids , cuttings, and formation watera w i l l a l l occur
and be l imi ted to the offshore area and not i n f r i n g e on the
Louisiana Coaatai Zone.
The other constituents of the propoaed diacharge froi.. J
f ive exploration wells include daaalinization plant waatea (aea
s a l t s ) , t r s a t e d a a n i t a r y v a a t a (to aecondary t r e a t a e n t
s t a n d a r d s ) , r u n o f f ( r a i n watar) and r i g waah water ( o i l
separated; v i l l ba monitored in accordance with the conditions of
tha EPA NPDES perai t . No s ignif icant water quality impacts are
expected froa the diapoaal of theae a a t a r i a l a on the OCS or
coastal zone.
10
(9) A i r Quality
A i r emissions w i l l resu l t from support vehicles (boats and
h a l i c o p t a r s ) as wal l aa from tha d r i l l i n g r i g . Antic ipated
emissiona are a l l expected tc be below WiS guideline l i r i t a and
a r e g iven in the Appendix. Any waste a a t e r i a l su i table for
onsumption by f ish or othe*- marine 1 fe May be discarded into
the water. All other c/t<*.H of vast* ma-er«.al are to be collected
and transported to shore for ». - >pe- 1 '..--osal.
The most sariou.1 emwiew. air q>:.a . . „ r r o M « i s in the region
a r e around -ba.. a %es, p :*m '•>.-*•/ .oae which are highly
i n d u s t r i a l ! M t h o r h e&i ~ - 4 c n a data are important ,
p a r t i c u l a r l y when con&' ^er. n.j control ? '.ernstives, i t must be
remembered that ambient a ir guality offshore ia excellent, and
the discharge of gaseous emissions does noc havs ths cumulative
impact that a s i a i l a r voluae of eaissions would have in an area
wi th poor ambient a i r qual i ty . These a i r eaissions are expected
to have negligible impact on tha coastal zona of Louiaiana by
v i r t u e of their amall amount and distance offshore.
(10) Endangered or Threatened Speciea
A l l of tha aea t u r t l e a which occur in the Gulf of Mexico are
endangered or threatened. None of them neat in louiaiana vest of
tha Mississippi d s l t a . The rareet of theae turt les , the Atlantic
R id l ey (Lopldocholva koapi) apparently use s the northern Gulf a*
a feedinq ground. . key to the a u r v i v a l of thia apeciea,
however, i s in ths protection of i t s nesting beach in Tamaulipas,
Mexico. Other turt les found in the northern Culf of Mexico are
the green tur t l e (Chelonia avdas), loggerhead (Caretta caret ta) ,
and the leatherback (PtrBQChelYf coriacea) .
C e r t a i n whalee and do lph ins may a lao be found i n the
northern Gulf of Mexico (Lowery, 1974) . Endangered species of
whales occurring in the Gulf include the giant aperm whale
(Phvsetet catodon) and the f i n b o c k e d whale (Ba laenoptera
phvsalus) . These are rare in the Gulf and i t i s doubtful that
dr i l l ing ac t iv i t i ee in Ewing Bank block 828 w i l l affect theae
species. Other aarine mammals which are not endangered but are
more commoniy found in the area are the A t l a n t i c bottienoaed
dolphin (Tura iopa t r u n c a t u a ) , spo t t ed do lph in ( S t e n e l l a
plaaiodoni, false k i l l e r whale (Paaudorca craasidsns) , and the
common dolphin (Delohinus delohis) .
Both the aforementioned, tur t l e s and mammals, would su f f sr
temporary loaa of a amall area for feeding grounds. Col l i s ions
with motorized veaaela are saible but highly unlikely. More
information on threatened or endangered species ia presented j . i
the Draft Environmental Impact Statement for the Gulf £ Mexico
Salea 123 and 125, pages 111-20 through XXI-243.
b. Socio-Economics
Ths o f f s h o r e o i l e x p l o r e t i c 4 product ion i n d u s t r y
12
i n c l u d i n g o i l companies , d r i l l i n g c o n t r a c t o r i , o i l f i s l d
auppliara snd ths raat of tha o i l industry infrastructure provide
a major input to aouth central Louiaiana'a economy. The support
base for the propoeed exploratory d r i l l i n g a c t i v i t y , Leev i l l e , l a
almoat ent ire ly dependent on the o i l end commercial f i a h i n g
i n d u a t r i e e for d i r e c t and i n d i r e c t employment in eupport
industries (Larson j& a l . . 1980). Aa atated in tha introduction,
Chavron U.S.A. I n c . w i l l provide a aocio-economic data baae
repor t for e l l OCS operat ions including data for Ewinq Bank
block 826. Alao aa previoualy ststsd, no new employees w i l l be
required for this project , either aa d r i l l i n g crews or in support
functions.
vmVQILMBLE ADVERSE IMPACTS
Advsrss impacta w i l l reeult froa discharge of cuttings and
d r i l l i n g f luids, emissions from boata, helicopters, end engines
on the dr i l l ing r i g , Iooo of trswling srss fo. . ishing vsssolo,
and an increaaed potential for o i l a p i l l s . Also, presence of the
d r i l l i n g rig v i l l present a alight navigation hazard to voooola
i n the eroa.
Water quality w i l l bo affected by the discharge of f luide
and cuttings during tha d r i l l i n g period. This w i l l rooult in cho
loos of one to two hectares of trawling area for commercial and
sport fishsrmen. There w i l l s lso be e temporary iapact on the
benthos in ths lata ed la te area of the r ig aa cuttings se t t le to
13
t h * bottom. Th* h**vy metals in th* d r i l l i n g f l u i d * could
conceivably hava an adverse impact on tha biota, but tho volume
of water i s so greet r e l e t i v e to the voluae of diechsrged
e f f luent that i t cannot bo meaaured.
Water guality i a affected by spi l led o i l . In the unl ike ly
event that an o i l a p i l l occurs, thsre would be a p o t e n t i a l
adverae effect on marine mammals snd birds. I f sp i l l ed o i l were
to reach ahore, aome impact vould occur on the shallow water
b i o t a . However, major o i l a p i l l a ( o i l s p i l l s > 238 b a r r e l a )
o r i g i n a t i n g at d r i l l r i g a or p la t forme are r e r o end the
i n d u a t r y ' a o i l a p i l l prevention end clean-up proceduroa w i l l
reduce the chance of any sp i l l ed c i l from reaching ahore.
Chronic o i l pollution of the sea . » remote poss ib i l i ty , but the
t o t a l contribution of the offehore induatry i s n e g l i g i b l e
compared with land runoff froa rivere and o i l transport. Ths
d i s t a n c e froa mainland ahore (64 miloo) anu the predominant
currant and winds in Swing Bank block 828 make the probabil i ty
any spilled petroleum hydrocarbons reaching shore negl ig ible .
The dr i l l ing r i g aay preaent e s l ight navigation hazard to
f iahing and ssrvice vassa ls in the area, but Ewing Bank block 828
i a l o c a t e d approx imate ly 7.5 mi les nor th f r o a tho n e a r e s t
ahipping lane and w i l l bo marked vith navigation l ighto.
14
Air emissions fron movable and immovable aourcea v i l l raault
from the propoeed exploretion. Hovever, becauae of the diatance
between the d r i l l i n g r i g and ahore, and the excellent ambient a i r
q u a l i t y , theee emiaaiona cannot be conaidered aa c r e a t i n g
s igni f icant impacta.
15
a*TX-X3XBrTI.X]«.
Behler, J . L . and F.w. King. 1979. Tha Audubon Sociaty f i a l d guide to North American reptiles and aaphibiana. Alfred A. Knopf Publiahing, New York. 719p.
Conant, R. 1958. A f ie ld guide to rept i les and aaphibiana of E a s t e r n and C e n t r a l North A a e r i c a . Houghton M i f f l i n Coapany, Boaton. 4 29p.
Lowery, G.H. 1974. The aaaaals of Louiaiana and i ta adjacent waters. LSU Preaa, Baton Rouge, Louiaiana. 565p.
U.S. Departaent of Coaaerce, National Marine / i sher ie s Service. 1989. F i sher ies of the United State 1988. U.S. Governaent Printing Of f i ce , Washington D.C. 116 pp.
U . S . Department of the In ter ior , Bureau of Land Manageaent. 1979. Draft environaental iapact stateaent for the proposed 1980 Outer Continental Shelf O i l and Gaa Leaae Salee A62 and 62.
U.8. Departaent of the Interior, Minerala Manageaent Service. 1987. Final env i ifonaenta. iapact stateaent for the propoaad o i l and gaa leaae ealee 113/115 and 116, Gulf of Mexico OCS Region. Minerala Manageaent S e r v i c e , Gulf of Mexico OCS Region, Meteirie, Louiaiana. 709 p.
U.S. Departaent of the Interior, Minerala Manageaent Service. 1989. Draft environaental iapact atateaent, Gulf of Mexico, Salea 123 and 125; central and weetern plenning ereee. Minerala Manageaent Service , Gulf of Mexico OCS ' gion, Metairie, Louisiana. 401 p.
16
The propoeed ac t iv i ty w i l l be carried out and completed with the
guarantee of the following iteae.
1. The beat ava i l ab l e and s a f e a t technologies w i l l be
u t i l i zed throughout the project . This includes aeeting
a l l a p p l i c a b l e requirementa f o r equipment typea ,
general project layout, safety systems, and equipment
and monitoring systems.
2. A l l operations w i l l be covered by USGS approved o i l
a p i l l contingency plan.
3. A l l applicable Federal, State and local requirements
r e g a r d i n g < ir emieeion, water q u a l i t y and waate
discharge for the propoaed a c t i v i t i e s , aa well ae any
other regulatory conditiona, w i l l be complied with.
GULF OF MEXICO
/ BLOCK 828
EXHIBIT 1
EWING BANK BLOCK 828 IN RELATION TO THE LOUISIANA COAST
STCiycc * ASSOC.. me. •moAum$ M rm tmmommr
WELL C
WELL A
WELL B
+ BLOCK 828
WELL D
4-WELL E
REFERENCE: CHEVRON USA INC. EXPLORATION & GEOLOGIC PLAN
EXHIBIT 2
PROPOSED WELL LOCATIONS
EWING BANK BLOCK 828
STEIMLE & ASSOC., INC.
VW»» \ m m «—
18
AIR QUALITY STUDY EMISSIONS DATA AND CALCULATIONS
DISTANCE TO NEAREST MAINLAND SHORE IS 64 MILES
somrce Descriptions 1 - Crew boat, assumed four round tr ips per week.
1 - Workboat, assumed seven round tr ips per week.
2 - Twin engine helicopters, nine round tr ips per week t o t a l .
There are f ive wells to be dr i l led under this exploration pl requiring a total of 400 days d r i l l i n g time. Total depth 53,000 feet.
19
SHORE BASE EMISSIONS (TONS/YEAR)
SOURCE POLLUTANT CO so2
NOx VOC TSP
Crew Boat 3.66 0.34 7.78 4.88 0.42 work Boat 6.40 0.59 13.61 8.54 0.74 H e l i c o p t e r 5.34 0.17 0. 53 0.49 0.23
T o t a l Emissions: 15.40 1.10 21.92 13.91 1.39
OFFSHORE EMISSIONS (TONS/YEAR)
SOURCE POLLUTANT CO s o 2 N0X VOC TSP
Crew Boat 3.66 0.34 7. 78 4.88 0.42 Work Boat 6.40 0.59 13. 61 8.54 0.74 H a l i c o p t e r R i g ' s Diese l Engine
5.34 0.17 0. 53 0.49 0.23 H a l i c o p t e r R i g ' s Diese l Engine 6.63 3.05 45. 22 1.51 3.81
T o t a l Emissions: 22.03 4.15 67. 14 15.42 5.20
Exemption Leve la : 54,401 2,131 2,13 1 2,131 2,131
Exemption l e v e l s f o r amiss ions:
CO E - 3400 D 2 ' ' 3
E - 3400 ( 6 4 ) 2 / 1 - 54,401 t o n s / y e a r
O t h e r s E - 33.3 D
E - 33.3 (64) - 2,131 cons/year
TSP va luea are assumed to be 1.25 of the s o 2 va luea on a worat c a s e b a s i s . The a c t u a l TSP v a l u e a may be l o v e r t h a n thoae presented in the t a b l e .
Theae exemption l e v e l a were c a l c u l a t e d f r o a formula l i a t e d i n 30 CPR 250.57- l (d) .
20
EMISSIONS Fl M JSSELS IDTE AT SHORE BASE AND ALONGSIDE DRILLING RIG
CREW BOAT WORKBOAT lbs/dav topt/vrt iPeVf l f lY—^ca/vr . .
CO 35. 18 3.66 35. 18 6.40
so2 3 . 24 0. 34 3.24 0.59
•»« 74 . 77 7.78 74 . 77 13.61
' oc 46.94 4 .88 46.94 8.54
TSP 4.05 0.42 4.05 0.74
Aaauapt<-na:
Vaaaala at aach a i t * 50% of the t i a a . Ona hunared twenty gallons of fuel per veaael per day.
Valuea for a l l Dollutanta except &02 and TSP vere calculated froa t a b l e s 3 . 2 . 3 - 3 of P a r t A of U . S . EPA P u b l i c a t i o n AP-42, "Coapilatio. of A i r Pollutant Faieaion Factora." Eaiaaiona vere determined on a v c r s t case baais.
S0 2 valuea vere taken froa Table 3.2.3-4 of the same publication. These EPA values vera calculated rather than measured and aecuaed thot a l l aulfur i n fuel vas converted to S 0 2 . Thie aaaumption vaa applied to the fuel uaed in d iese l veaael engines du to a lack of other data. VSP valuee vere assumed to be 1.25 of the S0 2 values based on I ratio averaged froa aeveral tables for diesel engines in the abov« mentioned EPA publication, AP-42.
21
HELICOPTER EMISSIONS POR TAKS-OFF ANU LANDINC CYCLE AT
DRI X" NO RIG AND SHORE BASE
CO 14 t r 5.34
so2 0.72 0.17
/ .28 0.53
VOC 2.06 0.49
TSP i . 00 0.23
Calculations nade using Tabla 3.2.1-3 of U.S. EPA Publication AP-42, "Compilation of Air Pollutant Emission Pactora."
Aaauoption - ono two angins helicopter, nine take-off and landing cyclee et each location per week.
22
s DRILLING RIG DIESEL ENGINE8 EMISSIONS
tgns/Yr.
CO 6.63
3 . 0 5
45.22
VOC 1. 51
TSP 3.81
Calculations war* aaaa using eaission rataa l i s tad ln Table 4-4 of U.S . EPA Publication 450/3-77-026, June, 1977, "Ataoepheric Eaiesione froa Offehore o i l end Gee Developaent end Production."
Tha f o l l o v i n g modi f i ed f o r a u l a f r o a the above aentioned publication wee ueed to calculate pounds s a l t ted per ve i l froa graaa per horsepower l i a ted in the table.
x total dtPth (Ct.l x so hPh x t Ql Willi f t . yeer
2,000 lbe ton/year
TSP veluee vere aseuaed to bo 1.25 of the BOa valuea.
