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40 C.F.R. § 435.15

Standards of performance for new sources (NSPS).

§ 435.15 Standards of performance for new sources (NSPS).

Any new source subject to this subpart must achieve the following new source performance standards (NSPS):

New Source Performance Standards

Waste source Pollutant parameter NSPS
Produced waterOil and greaseThe maximum for any one day shall not exceed 42 mg/l; the average of daily values for 30 consecutive days shall not exceed 29 mg/l.
Drilling fluids and drill cuttings:
(A) For facilities located within 3 miles from shoreNo discharge. 1
(B) For facilities located beyond 3 miles from shore:
Water-based drilling fluids and associated drill cuttingsSPP ToxicityMinimum 96-hour LC50. of the SPP Toxicity Test 2 shall be 3% by volume.
Free oilNo discharge. 3
Diesel oilNo discharge.
Mercury1mg/kg dry weight maximum in the stock barite.
Cadmium3 mg/kg dry weight maximum in the stock barite.
Non-aqueous drilling fluidsNo charge.
Drill cuttings associated with non-aqueous drilling fluids:
Stock Limitations (C16-C18 internal olefinMercury1mg/kg dry weight maximum in the stock barite.
Cadmium3 mg/kg dry weight maximum in the stock barite.
Polynuclear Aromatic Hydrocarbons (PAH)PAH mass ratio 5 shall not exceed 1 × 10−5.
Sediment toxicityBase fluid sediment toxicity ratio 6 shall not exceed 1.0.
Biodegradation rateBiodegradation rate ratio 7 shall not exceed 1.0.
Discharge LimitationsDiesel oilNo discharge.
SPP ToxicityMinimum 96-hour LC50. of the SPP Toxicity Test 2 shall be 3% by volume.
Sediment toxicityDrilling fluid sediment toxicity ratio 8 shall not exceed 1.0.
Formation OilNo discharge. 9
Base fluid retained on cuttingsFor NAFs that meet the stock limitations (C16-C18 internal olefin) in this table, the maximum weighted mass ratio averaged over all NAF well sections shall be 6.9 g-NAF base fluid/100 g-wet drill cuttings. 10
For NAFs that meet the C12-C14 ester or C8 ester stock limitations in footnote 11 of this table, the maximum weighted mass ratio averaged over all NAF well sections shall be 9.4 g-NAF base fluid/100 g-wet drill cuttings.
Well treatment, completion, and workover fluidsOil and greaseThe maximum for any one day shall not exceed 42 mg/l; the average of daily values for 30 consecutive days shall not exceed 29 mg/l.
Deck drainageFree oilNo discharge. 4
Produced sandNo discharge.
Sanitary M10Residual chlorineMinimum of 1 mg/l and maintained as close to this as possible.
Sanitary M9IMFloating solidsNo discharge.
Domestic WasteFloating solidsNo discharge.
FoamNo discharge.
All other domestic wastesSee 33 CFR part 151.
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