40 CFR 434.52 - Effluent limitations quidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

§ 434.52 Effluent limitations quidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
(a) Reclamation areas. The limitations in this subsection apply to discharges from reclamation areas until the performance bond issued to the facility by the appropriate SMCRA authority has been released.
Except as provided in 40 CFR 125.30-125.32, 40 CFR 401.17 and §§ 434.61 and 434.63(d)(2) of this part, the following limitations establish the concentration or quality of pollutants which may be discharged by a point source subject to the provisions of this subsection after application of the best practicable control technology currently available:
BPT Effluent Limitations
Pollutant or pollutant property Limitations
1 Within the range 6.0 to 9.0 at all times.
Settleable Solids 0.5 ml/l maximum not to be exceeded.
pH (1)
(b) Underground mine drainage. The limitations in this subsection apply to discharges from the underground workings of underground mines until SMCRA bond release.
(1) Except as provided in 40 CFR 125.30-125.32, 40 CFR 401.17 and §§ 434.61, 434.62 and 434.63 of this part, the following limitations establish the concentration of quality of pollutants in acid or ferruginous mine drainage subject to the provisions of this subsection after application of the best practicable control technology currently available:
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Average of daily values for 30 consecutive days
1 Within the range 6.0 to 9.0 at all times.
Concentration in mg/l
Iron, total 7.0 3.5
Manganese, total 4.0 2.0
TSS 70.0 35.0
pH (1) (1)
(2) Except as provided in 40 CFR 125.30-125.32, 40 CFR 401.17, and §§ 434.61 and 434.63 of this part, the following limitations establish the concentration or quality of pollutants in alkaline mine drainage subject to the provisions of this subsection after application of the best practicable control technology currently available:
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Average of daily values for 30 consecutive days
1 Within the range 6.0 to 9.0 at all times.
Concentration in mg/l
Iron, total 7.0 3.5
TSS 70.0 35.0
pH (1) (1)

Title 40 published on 2014-07-01

no entries appear in the Federal Register after this date.

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code
Statutes at Large