Except as provided in 40 CFR 125.30-32, 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
| Waste source | Pollutant parameter | BCT effluent limitation |
|---|---|---|
| Produced water | Oil & grease | The maximum for any one day shall not exceed 72 mg/l; the average of values for 30 consecutive days shall not exceed 48 mg/l. |
| Drilling fluids and drill cuttings: | ||
| (A) For facilities located within 3 miles from shore | No discharge.1 | |
| (B) For facilities located beyond 3 miles from shore: | ||
| Water-based drilling fluids and associated drill cuttings | Free Oil | No discharge.2 |
| Non-aqueous drilling fluids | No discharge. | |
| Drill cuttings associated with non-aqueous drilling fluids | Free Oil | No discharge.2 |
| Well treatment, completion and workover fluids | Free oil | No discharge.2 |
| Deck drainage | Free oil | No discharge.3 |
| Produced sand | No discharge. | |
| Sanitary M10 | Residual chlorine | Minimum of 1 mg/l and maintained as close to this concentration as possible. |
| Sanitary M91M | Floating solids | No discharge. |
| Domestic Waste | Floating solids | No discharge. |
| All other domestic waste | See 33 CFR part 151. |
1All Alaskan facilities are subject to the drilling fluids and drill cuttings discharge limitations for facilities located more than 3 miles offshore.
2As determined by the static sheen test. See §435.11(hh).
3As determined by the presence of a film or sheen upon or a discoloration of the surface of the receiving water (visual sheen).
[58 FR 12504, Apr. 13, 1979, as amended at 66 FR 6899, Jan. 22, 2001; 77 FR 29836, May 18, 2012]
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