View all text of Subpart A [§ 435.10 - § 435.15]
§ 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 water | Oil and grease | The 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 shore | No discharge. 1 | (B) For facilities located beyond 3 miles from shore: | Water-based drilling fluids and associated drill cuttings | SPP Toxicity | Minimum 96-hour LC | Free oil | No discharge. 3 | Diesel oil | No discharge. | Mercury | 1mg/kg dry weight maximum in the stock barite. | Cadmium | 3 mg/kg dry weight maximum in the stock barite. | Non-aqueous drilling fluids | No charge. | Drill cuttings associated with non-aqueous drilling fluids: | Stock Limitations (C | Mercury | 1mg/kg dry weight maximum in the stock barite. | Cadmium | 3 mg/kg dry weight maximum in the stock barite. | Polynuclear Aromatic Hydrocarbons (PAH) | PAH mass ratio
5 shall not exceed 1 × 10 | Sediment toxicity | Base fluid sediment toxicity ratio 6 shall not exceed 1.0. | Biodegradation rate | Biodegradation rate ratio 7 shall not exceed 1.0. | Discharge Limitations | Diesel oil | No discharge. | SPP Toxicity | Minimum 96-hour LC | Sediment toxicity | Drilling fluid sediment toxicity ratio 8 shall not exceed 1.0. | Formation Oil | No discharge. 9 | Base fluid retained on cuttings | For NAFs that meet the stock limitations (C For NAFs that meet the C | Well treatment, completion, and workover fluids | Oil and grease | The 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 drainage | Free oil | No discharge. 4 | Produced sand | No discharge. | Sanitary M10 | Residual chlorine | Minimum of 1 mg/l and maintained as close to this as possible. | Sanitary M9IM | Floating solids | No discharge. | Domestic Waste | Floating solids | No discharge. | Foam | No discharge. | All other domestic wastes | See 33 CFR part 151. |
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1 All Alaskan facilities are subject to the drilling fluids and drill cuttings discharge standards for facilities located more than three miles offshore.
2 As determined by the suspended particulate phase (SPP) toxicity test. See § 435.11(gg).
3 As determined by the static sheen test. See § 435.11(hh).
4 As determined by the presence of a film or sheen upon or a discoloration of the surface of the receiving water (visual sheen).
5 PAH mass ratio = Mass (g) of PAH (as phenanthrene)/Mass (g) of stock base fluid as determined by EPA Method 1654, Revision A, [specified at § 435.11(u)] entitled “PAH Content of Oil by HPLC/UV,” December 1992, which is published as an appendix to subpart A of this part and in “Analytic Methods for the Oil and Gas Extraction Point Source Category,” EPA-821-R-11-004. See § 435.11(uu).
6 Base fluid sediment toxicity ratio = 10-day LC
7 Biodegradation rate ratio = Cumulative headspace gas production (ml) of C
8 Drilling fluid sediment toxicity ratio = 4-day LC
9 As determined before drilling fluids are shipped offshore by the GC/MS compliance assurance method (EPA Method 1655), and as determined prior to discharge by the RPE method (EPA Method 1670) applied to drilling fluid removed from drill cuttings. If the operator wishes to confirm the results of the RPE method (EPA Method 1670), the operator may use the GC/MS compliance assurance method (EPA Method 1655). Results from the GC/MS compliance assurance method (EPA Method 1655) shall supersede the results of the RPE method (EPA Method 1670). EPA Method 1655 and 1670 are published as appendices to subpart A of this part and in “Analytic Methods for the Oil and Gas Extraction Point Source Category,” EPA-821-R-11-004. See § 435.11(uu).
10 Maximum permissible retention of non-aqueous drilling fluid (NAF) base fluid on wet drill cuttings averaged over drilling intervals using NAFs as determined by EPA Method 1674, which is published as an appendix to subpart A of this part and in “Analytic Methods for the Oil and Gas Extraction Point Source Category,” EPA-821-R-11-004. See § 435.11(uu). This limitation is applicable for NAF base fluids that meet the base fluid sediment toxicity ratio (Footnote 6), biodegradation rate ratio (Footnote 7), PAH, mercury, and cadmium stock limitations (C
11 Maximum permissible retention of non-aqueous drilling fluid (NAF) base fluid on wet drill cuttings average over drilling intervals using NAFs as determined by EPA Method 1674, which is published as an appendix to subpart A of this part and in “Analytic Methods for the Oil and Gas Extraction Point Source Category,” EPA-821-R-11-004. See § 435.11(uu). This limitation is applicable for NAF base fluids that meet the ester base fluid sediment toxicity ratio and ester biodegradation rate ratio stock limitations defined as:
(a) ester base fluid sediment toxicity ratio = 10-day LC
(b) ester biodegradation rate ratio = Cumulative headspace gas production (ml) of C