Regulations last checked for updates: May 19, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
§ 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 125.30-32, 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 practicable control technology currently available:

BPT Effluent Limitations—Oil and Grease

[In milligrams per liter]

Pollutant parameter waste source Maximum for any 1 day Average of values for 30 consecutive days shall not exceed Residual chlorine minimum for any 1 day
Produced water7248NA
Deck drainage( 1)( 1)NA
Water-based:
Drilling fluids( 1)( 1)NA
Drill Cuttings( 1)( 1)NA
Non-aqueous:
Drilling fluidsNo dischargeNo dischargeNA
Drill Cuttings( 1)( 1)NA
Well treatment fluids( 1)( 1)NA
Sanitary:
M10NANA 2 1
M9IM 3NANANA
DomesticNANANA

1 No discharge of free oil. See § 435.11(x).

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; 77 FR 29836, May 18, 2012]
source: 44 FR 22075, Apr. 13, 1979, unless otherwise noted.
cite as: 40 CFR 435.12