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Electronic Code of Federal Regulations

e-CFR data is current as of December 4, 2019

Title 40Chapter ISubchapter NPart 435Subpart D → §435.44


Title 40: Protection of Environment
PART 435—OIL AND GAS EXTRACTION POINT SOURCE CATEGORY
Subpart D—Coastal Subcategory


§435.44   Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT).

Except as provided in 40 CFR 125.30-125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT):

BCT Effluent Limitations

Stream Pollutant parameter BCT effluent limitations
Produced Water (all facilities)Oil & GreaseThe maximum for any one day shall not exceed 72 mg/l and the 30-day average shall not exceed 48 mg/l.
Drilling Fluids and Drill Cuttings and Dewatering Effluent:1
All facilities except Cook InletNo discharge.
Cook Inlet:
Water-based drilling fluids, drill cuttings, and dewatering effluentFree OilNo discharge.2
Non-aqueous drilling fluids and dewatering effluent   No discharge.
Drill cuttings associated with non-aqueous drilling fluidsFree OilNo discharge.2
Well Treatment, Workover and Completion FluidsFree OilNo discharge.2
Produced SandNo discharge.
Deck DrainageFree OilNo discharge.3
Sanitary Waste:
Sanitary M10Residual ChlorineMinimum of 1 mg/l maintained as close to this concentration as possible.
Sanitary M91MFloating SolidsNo discharge.
Domestic WasteFloating Solids and garbageNo discharge of Floating Solids or garbage.

1BCT limitations for dewatering effluent are applicable prospectively. BCT limitations in this rule are not applicable to discharges of dewatering effluent from reserve pits which as of the effective date of this rule no longer receive drilling fluids and drill cuttings. Limitations on such discharges shall be determined by the NPDES permit issuing authority.

2As determined by the static sheen test. See §435.41(ff).

3As determined by the presence of a film or sheen upon or a discoloration of the surface of the receiving water (visual sheen).

[61 FR 66125, Dec. 16, 1996; 62 FR 1682, Jan. 13, 1997, as amended at 66 FR 6917, Jan. 22, 2001; 77 FR 29846, May 18, 2012]

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