TITLE 40 - PROTECTION OF ENVIRONMENT

CHAPTER I - ENVIRONMENTAL PROTECTION AGENCY

SUBCHAPTER N - EFFLUENT GUIDELINES AND STANDARDS

PART 435 - OIL AND GAS EXTRACTION POINT SOURCE CATEGORY

subpart a - OFFSHORE SUBCATEGORY

435.12 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

Except as provided in 40 CFR 125.3032, 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 practicable control technology currently available: BPT Effluent Limitations_Oil and Grease [In milligrams per liter] ------------------------------------------------------------------------ Average of values for Residual Maximum 30 chlorine Pollutant parameter waste source for any 1 consecutive minimum day days shall for any 1 not exceed day ------------------------------------------------------------------------ Produced water....................... 72 48 NA Deck drainage........................ (\1\) (\1\) NA Water-based: Drilling fluids.................... (\1\) (\1\) NA Drill Cuttings..................... (\1\) (\1\) NA Non-aqueous: Drilling fluids.................... No No NA discharge discharge Drill Cuttings..................... (\1\) (\1\) NA Well treatment fluids................ (\1\) (\1\) NA Sanitary: M10................................ NA NA \2\ 1 M9IM \3\........................... NA NA NA Domestic............................. NA NA NA ------------------------------------------------------------------------ \1\ No discharge of free oil.

\2\ Minimum of 1 mg/l and maintained as close to this concentration as possible.

\3\ There shall be no floating solids as a result of the discharge of these wastes.

[58 FR 12504, Apr. 13, 1979, as amended at 66 FR 6897, Jan. 22, 2001]