UNITED STATES GOVERNMENT MEMORANDUM

To: Public Information (MS 5030)

Plans Section, Office of Field Operations (MS 5231) Public Information copy of DOCD Control # - S-07467 Type - Supplemental Development Operations Coordinations Document Lease(s) - OCS-G02754 Block - A 376 High Island Area Operator - Apache Corporation Drilling, completion, and production of Wells A-26 and B-6 JACKUP

Attached is a copy of the subject plan for public comments on issues that should be addressed in an Environmental Assessment. It has been deemed submitted as of this date and is under review for approval.

James Webb Plan Coordinator

G02754/HI/A 376 G02754/HI/A 376 G02754/HI/A 376 1109 FNL, 6702 FEL 1109 FNL, 6702 FWL 4410 FSL, 8230 FEL G02754/HI/A 376 G02754/HI/A 376 G02754/HI/A 376 WELL/A-26 WELL/A-26 WELL/B-6 Botm Lse/Area/Blk Surface Location Surf Lse/Area/Blk Site Type/Name Description - Rig Type - Subject: From: August 13, 2012

### please specify if the amount reported is a total or per well amount


## Projected generated waste Projected ocean discharges

Type of Waste Composition Projected Amount Discharge rate Discharge Method Answer yes or no Will drilling occur ? If yes, you should list muds and cuttings EXAMPLE: Cuttings wetted with synthetic based fluid Cuttings generated while using synthetic based drilling X bbl/well X bbl/day/well discharge overboard No Water-based drilling fluid Water based drilling fluid (Low ph Dispersed). 9510 barrels / total 679 bbls / day / well Discharge overboard through shunt. No
Cuttings wetted with water-based fluid Cuttings generated while using water based drilling fluid. 1657 barrels / total 118 bbls / day / well Discharge overboard through shunt. No Cuttings wetted with synthetic-based fluid N/A N/A N/A N/A N/A Will humans be there? If yes, expect conventional waste EXAMPLE: Sanitary waste water Sanitary waste from living quarters X bbl/well X bbl/hr/well chlorinate and discharge overboard No Domestic waste Domestic waste from liv qtrs 85 bbls / day/well 85 bbls / day/well Raw water discharge No Sanitary waste Sanitary waste from liv qtrs 50 bbls / day/well 50 bbls / day/well Raw water discharge No Is there a deck? If yes, there will be Deck Drainage Deck Drainage Wash water from deck 100 barrels/well 4 barrels / hr/well drainage No Will you conduct well treatment, completion, or workover? Well treatment fluids NA Well completion fluids 11.0 PPG CACL 200 barrels/well 20 bbls / day/well discharge overboard no Workover fluids NA Miscellaneous discharges. If yes, only fill in those associated with your activity. Desalinization unit discharge Salt Water 23 gal / min 23 gal / min discharge overboard No Blowout prevent fluid NA NA NA NA No Ballast water NA NA NA NA No Bilge water Drill Water w/contaiments 2 bbls / day/well 2 bbls / day discharge overboard No Excess cement at seafloor Class 'H' cement 150 bbls/well 75 bbls / day for two dDischarge through shunt. No Fire water Salt Water 450 gal / min/well 450 gal / min discharge overboard No Cooling water Salt Water 50 gal / min/well 50 gal / min discharge overboard No Will you produce hydrocarbons? If yes fill in for produced water. Produced water NA Will you be covered by an individual or general NPDES permit ? Yes; General NOTE: If you will not have a type of waste, enter NA in the row. 

# TABLE 1. WASTES YOU WILL GENERATE, TREAT AND DOWNHOLE DISPOSE OR DISCHARGE TO THE GOM Projected Downhole

DisposalSECTION N SUPPORTVESSELS AND AIRCRAFTINFORMATION 

### (30 CFR250.224 and 250.257)

A. GENERAL 

### Apache will travel the most practical, direct route from the shorebase to High Island BlockA-376 as permitted by weatherand traffic conditions. 

### Type Maximum Fuel 

### Tank Capacity Maximum Number in Area 

### atAny Time Trip Frequency
or Duration 

### Tug Boats 3000 bbls 2 

### 6 Days Crew Boat 1500 bbls 1 

### 3 Trips/Week 

### Supply Boat 500 bbls 1 

### 3 Trips/Week

Helicopter 

### 760 gallons 1 As Needed

B. DIESEL OIL SUPPLYVESSELS
Size ofFuel 

### Capacity ofFuel 

### Frequency of Route Fuel Supply Supply Vessel Supply Vessel Fuel Transfers Vessel Will Take 180' 1500 bbls 

### Weekly From the shorebase in 

### Cameron, LA to High Island BlockA-376, then back to shorebase


### D. SOLID AND LIQUID WASTE TRANSPORTATION 

### Type ofWaste Total Name/Location Rate 

### Transportation Approx. Amount Method 

### Composition Trash & debris 7740 cu/ft BFIat NA 

### Compactor peryear 

### Cameron, LA 

### bags and 

### shipped to landfill

E. VICINITY MAP 

## Avicinitymap showing the location of the proposed activities relative tothe shoreline, the distance ofthe proposed activities from the shoreline and the 

## supportbase, andthe primary route of the supportvessels and aircraftthatwill be used whentraveling between the onshore supportfacilities is included as AttachmentN-1.


### Apache Corporation 

### Supplemental DOCD 

## High Island Block A-376 (OCS-G 02754) Page N-1 

### July 30, 2012