# Petrobras America, Inc.

Development Operations Coordination Document

Cascade / Chinook Development Project



# APPENDIX 7 ­A

Rig Waste Generated

and Dicharged

# This page left blank intentionally.ProjectedDownholeDisposalType of Waste CompositionProjected AmountDischarge rate Discharge MethodAnswer yes ornoWater-based drilling fluidContinuous phase and suspending medium for solids iswater miscible fluid16000 bbls per well500 bbls perhour per wellDischarged overboard with or at seabed (prior tomarine riser installation); no free oilNoCuttings wetted with water-basedfluidParticles generated by drilling into geologic formationsadhering to water based drilling fluids2000 bbls per well15 bbls per hourper wellDischarged overboard or at seabed (prior to marineriser installation); no free oilNoCuttings wetted with syntheticbased fluidParticles generated by drilling into geologic formationsadhering to synthetic based drilling fluids (internalolefin)7200 bbls per well15 bbls per hourper wellDischarged overboard line from cuttings dryer; nofree oilNoDomestic wasteDischarge from galleys, sinks, and showers210,000 gallonsper month50 gallons perday per personDischarge overboard; no floating solidsNoSanitary wasteHuman body waste from toilets and urinals126,000 gallonsper month30 gallons perday per personDischarge overboard; no floating solidsNoDeck Drainage Deck washing and rain water3,000 bbls permonth (dependenton rainfall)100 bbls per day(dependent onrainfall)Discharge overboard; no free oilNoWell treatment fluids XL Boraite7500 bbls per well400 bbls perwellDischarge overboard; no free oil NoWell completion fluidsSalt solutions, weighted brines, polymers, and variousadditives9,000 bbls per well200 bbls perhour per wellGravity oil/water separation then water dischargeoverboard with no free oilNoWorkover fluids included in well completion fluids NANA NANADesalinization unit dischargeChemically treated seawater associated with makingfresh water from seawater145,000 blls permonth< 100 BBls perday (dependenton use)Discharge overboard; no free oilNoBlowout preventer fluid Stack Magic at 3% (95% waterand 2% glycol) 300 bbls per well55 bbls permonthSubsea dischargeNABallast waterBallast water returned to sea without addition ofchemicals45,000 bbls permonth1,000 bbls perhourDischarge overboard; no free oilNoBilge waterBilge water returned to sea without addition ofchemicals2,000 bbls permonth10 bbls per hourGravity oil/water separation then water dischargeoverboard with no free oilNoExcess cement at seafloorDischarges that occur at seabed prior to installation ofmarine riser35000 bbls per well400 bbls perhour per wellDischarged at seabed (prior to marine riserinstallation); no free oilNoSeawaterUncontaminated Seawater90,000 bbls permonth125 bbls perhourDischarge overboard; no free oilNoFire water included in seawater above NA NA NANACooling water NANA NA NANAProduced water NANA NA NANAAppendix 7-A. WASTES GENERATED, TREATED AND DISPOSED OR DISCHARGED TO THE GOM BY DRILLING RIGProjected ocean dischargesProjected generated wasteWill 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 7

­ B

F PSO Waste Generated

and Dicharged

# This page left blank intentionally.ProjectedDownholeDisposalType of Waste CompositionProjected AmountDischarge rate Discharge MethodAnswer yes ornoWater-based drilling fluidNANa NANANACuttings wetted with water-basedfluidNANA NANANACuttings wetted with syntheticbased fluidNANA NaNANADomestic wasteDischarge from galleys, sinks, and showers60,000 bbls permonth50 gallons perday per personDischarge overboard; no floating solidsNoSanitary wasteHuman body waste from toilets and urinals36,000 bbls permonth30 gallons perday per personDischarge overboard; no floating solidsNoDeck Drainage Deck washinh and rain water17,000 bbls permonth (dependenton rainfall)560 bbls per day(dependent onrainfall)Discharge overboard; no free oilNoWell treatment fluids NANA NA NANoWell completion fluidsNANA NANANAWorkover fluids NANA NA NANoDesalinization unit dischargeChemically treated seawater associated with makingfresh water from seawater900 bbls per month 30 blls per dayDischarge overboard; no free oilNoBlowout preventer fluid NANANoBallast waterBallast water returned to sea without addition ofchemicals1,410,000 bbls permonth47,000 bbls perdayDischarge overboard; no free oilNoBilge waterBilge water returned to sea without addition ofchemicals3,300 bbls permonth110 bbls per dayGravity oil/water separation then water dischargeoverboard with no free oilNoExcess cement at seafloorNANA NANANASeawaterUncontaminated Seawater3,600 bbls permonth120 bbls per dayDischarge overboard; no free oilNoHydrostatic (flowlines)Seawater used to pressure test new piping andpipelines23,000 bbls total250 bbls perhourDischarge overboard; no free oilNoFire water Included in uncontaminated sea waterNoCooling water Included in uncontaminated sea waterNoProduced waterFormation water containing scale inhibitors andmethanol480,000 bbls permonth16,000 bbls perdayHydrocyclone plus floatation unit then dischargeoverboard; no free oilNoAppendix 7-B. WASTES GENERATED, TREATED AND DISPOSED OR DISCHARGED TO THE GOM BY FPSOProjected ocean dischargesProjected generated wasteWill 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 7

­ C

R ig Waste t o Shore

# This page left blank intentionally.Solid and Liquid WastestransportationType of Waste Composition Transport MethodName/Location ofFacilityAmount Disposal MethodOil-based drilling fluid or mud NA NANA NA NASynthetic-based drilling fluid or mudContinuous phase of thedrilling fluid is a syntheticmaterialTanks or drums on offshore supportvesselsUS Liquids (PortFourchon, LA) orNewpark Services (PortFourchon, LA)750 bbls perwellRecycledCuttings wetted with Water-based fluid NA NANA NA NACuttings wetted with Synthetic-based fluid NA NANA NA NACuttings wetted with oil-based fluids NA NANA NA NAProduced sand NA NANA NA NATrash and debrisNon-hazardous garbage,trash, and debris that can notbe recycledContainers on offshore support vesselsWaste Management(Raceland, LA)One standard(25 m3)container perweekLandfillUsed oilLube oils (maintenance)Drums on offshore support vesselsMartin (Port Fourchon, LA)0-1 bbl perweekRecycledWash waterNA NANA NA NAChemical product wastes NA NANA NA NAWaste DisposalAppendix 7-C. WASTES YOU WILL TRANSPORT AND /OR DISPOSE OF ONSHORE FROM DRILLING RIGSProjected generated waste

# Petrobras America, Inc.

Development Operations Coordination Document

Cascade / Chinook Development Project



# APPENDIX 7

­ D

F PSO Waste t o Shore

# This page left blank intentionally.Solid and Liquid WastestransportationType of Waste Composition Transport MethodName/Location ofFacilityAmount Disposal MethodOil-based drilling fluid or mud NA NANA NA NASynthetic-based drilling fluid or mud NA NANA NA NACuttings wetted with Water-based fluid NA NANA NA NACuttings wetted with Synthetic-based fluid NA NANA NA NACuttings wetted with oil-based fluids NA NANA NA NAProduced sand NA NANA NA NATrash and debrisNon-hazardous garbage,trash, and debris that can notbe recycledContainers on offshore support vesselsWaste management(Raceland, LA)One standard(25 m3)container perweekLandfillUsed oilLube oils (maintenance)Drums on offshore support vesselsMartin (Port Fourchon,LA)10 bbls permonthRecycledWash waterNA NANA NA NAChemical product wastes NA NANA NA NAWaste DisposalAppendix 7-D. WASTES YOU WILL TRANSPORT AND /OR DISPOSE OF ONSHORE FROM FPSOProjected generated waste