Petrobras America, Inc. 

Development Operations Coordination Document 

Cascade / Chinook Development Project 

APPENDIX 7­A

 Rig Waste Generated 

 and Dicharged 
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Type of Waste Composition Projected Amount Discharge rate Discharge Method 

Water-based drilling fluid Continuous phase and suspending medium for solids is water miscible fluid 16000 bbls per well 500 bbls per hour per well Discharged overboard with or at seabed (pri

marine riser installation); no free oil 

Cuttings wetted with water-based fluid

Particles generated by drilling into geologic formations adhering to water based drilling fluids 2000 bbls per well 15 bbls per hour per well Discharged overboard or at seabed (prior to 

riser installation); no free oil 

Cuttings wetted with syntheticbased fluid Particles generated by drilling into geologic formations adhering to synthetic based drilling fluids (internal olefin) 7200 bbls per well 15 bbls per hour per well Discharged overboard line from cuttings dry

free oil 

Domestic waste Discharge from galleys, sinks, and showers 210,000 gallons per month 50 gallons per day per person Discharge overboard; no floating solids Sanitary waste Human body waste from toilets and urinals 126,000 gallons per month 30 gallons per day per person Discharge overboard; no floating solids Deck Drainage Deck washing and rain water

3,000 bbls per month (dependent on rainfall)

100 bbls per day (dependent on rainfall)

Discharge overboard; no free oil 

Well treatment fluids XL Boraite 7500 bbls per well 400 bbls per well Discharge overboard; no free oil Well completion fluids Salt solutions, weighted brines, polymers, and various additives 9,000 bbls per well 200 bbls per hour per well Gravity oil/water separation then water disc

overboard with no free oil 

Workover fluids included in well completion fluids NA NA NA Desalinization unit discharge Chemically treated seawater associated with making fresh water from seawater 145,000 blls per month < 100 BBls per day (dependent on use) Discharge overboard; no free oil Blowout preventer fluid Stack Magic at 3% (95% water and 2% glycol) 300 bbls per well 55 bbls per month Subsea discharge Ballast water Ballast water returned to sea without addition of chemicals 45,000 bbls per month 1,000 bbls per hour Discharge overboard; no free oil Bilge water Bilge water returned to sea without addition of chemicals 2,000 bbls per month 10 bbls per hour Gravity oil/water separation then water disc

overboard with no free oil 

Excess cement at seafloor Discharges that occur at seabed prior to installation of marine riser 35000 bbls per well 400 bbls per hour per well Discharged at seabed (prior to marine riser installation); no free oil Seawater Uncontaminated Seawater 90,000 bbls per month 125 bbls per hour Discharge overboard; no free oil Fire water included in seawater above NA NA NA Cooling water NA NA NA NA Produced water NA NA NA NA 

Appendix 7-A. WASTES GENERATED, TREATED AND DISPOSED OR DISCHARGED TO THE GOM BY DRILLING RIGProjected generated waste Projected ocean discharges 

Will you be covered by an individual or general NPDES permit ? General NPDES permit
Petrobras America, Inc. 

Development Operations Coordination Document 

Cascade / Chinook Development Project 

APPENDIX 7­B

 FPSO Waste Generated 

 and Dicharged 
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Type of Waste Composition Projected Amount Discharge rate Discharge Method 

Water-based drilling fluid NA Na NA NA 

Cuttings wetted with water-based fluid NA NA NA NA Cuttings wetted with syntheticbased fluid NA NA Na NA Domestic waste Discharge from galleys, sinks, and showers 60,000 bbls per month 50 gallons per day per person Discharge overboard; no floating solids Sanitary waste Human body waste from toilets and urinals 36,000 bbls per month 30 gallons per day per person Discharge overboard; no floating solids Deck Drainage Deck washinh and rain water

17,000 bbls per month (dependent on rainfall)

560 bbls per day (dependent on rainfall)

Discharge overboard; no free oil 

Well treatment fluids NA NA NA NA Well completion fluids NA NA NA NA Workover fluids NA NA NA NA Desalinization unit discharge Chemically treated seawater associated with making fresh water from seawater 900 bbls per month 30 blls per day Discharge overboard; no free oil Blowout preventer fluid NA NA Ballast water Ballast water returned to sea without addition of chemicals 1,410,000 bbls per month 47,000 bbls per day Discharge overboard; no free oil Bilge water Bilge water returned to sea without addition of chemicals 3,300 bbls per month 110 bbls per day Gravity oil/water separation then water disc

overboard with no free oil 

Excess cement at seafloor NA NA NA NA Seawater Uncontaminated Seawater 3,600 bbls per month 120 bbls per day Discharge overboard; no free oil Hydrostatic (flowlines) Seawater used to pressure test new piping and pipelines 23,000 bbls total 250 bbls per hour Discharge overboard; no free oil Fire water Included in uncontaminated sea water Cooling water Included in uncontaminated sea water Produced water Formation water containing scale inhibitors and methanol 480,000 bbls per month 16,000 bbls per day Hydrocyclone plus floatation unit then disch

overboard; no free oil 

Appendix 7-B. WASTES GENERATED, TREATED AND DISPOSED OR DISCHARGED TO THE GOM BY FPSO

Projected generated waste Projected ocean discharges 

Will you be covered by an individual or general NPDES permit ? General NPDES permit
Petrobras America, Inc. 

Development Operations Coordination Document 

Cascade / Chinook Development Project 

APPENDIX 7­C

 Rig Waste to Shore

 
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Solid and Liquid Wastes 

transportation 

Type of Waste Composition Transport Method Name/Location of Facility Amount 

Oil-based drilling fluid or mud NA NA NA NA Synthetic-based drilling fluid or mud 

 Continuous phase of the drilling fluid is a synthetic material

Tanks or drums on offshore support vessels

US Liquids (Port Fourchon, LA) or Newpark Services (Port Fourchon, LA)

750 bbls per well 

Cuttings wetted with Water-based fluid NA NA NA NA Cuttings wetted with Synthetic-based fluid NA NA NA NA Cuttings wetted with oil-based fluids NA NA NA NA Produced sand NA NA NA NA Trash and debris

Non-hazardous garbage, trash, and debris that can not be recycled

Containers on offshore support vessels Waste Management (Raceland, LA)

One standar(25 m3) container pe

week

Used oil Lube oils (maintenance) Drums on offshore support vessels Martin (Port Fourchon, LA)0-1 bbl per week 

Wash water NA NA NA NA Chemical product wastes NA NA NA NA 

Waste Disp

Appendix 7-C. WASTES YOU WILL TRANSPORT AND /OR DISPOSE OF ONSHORE FROM DRILLING RIGS

Projected generated waste
Petrobras America, Inc. 

Development Operations Coordination Document 

Cascade / Chinook Development Project 

APPENDIX 7­D

 FPSO Waste to Shore

 
This page left blank intentionally. 
Solid and Liquid Wastes 

transportation 

Type of Waste Composition Transport Method Name/Location of Facility Amount 

Oil-based drilling fluid or mud NA NA NA NA Synthetic-based drilling fluid or mud NA NA NA NA Cuttings wetted with Water-based fluid NA NA NA NA Cuttings wetted with Synthetic-based fluid NA NA NA NA Cuttings wetted with oil-based fluids NA NA NA NA Produced sand NA NA NA NA Trash and debris

Non-hazardous garbage, trash, and debris that can not be recycled

Containers on offshore support vessels Waste management (Raceland, LA)

One standar(25 m3) container pe

week

Used oil Lube oils (maintenance) Drums on offshore support vessels Martin (Port Fourchon, LA) 10 bbls per month 

Wash water NA NA NA NA Chemical product wastes NA NA NA NA 

Waste Disp

Appendix 7-D. WASTES YOU WILL TRANSPORT AND /OR DISPOSE OF ONSHORE FROM FPSO

Projected generated waste