---
kind: "section"
citation: "40 C.F.R. § 434.52"
title: "40"
number: "434.52"
heading: "Effluent limitations quidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT)."
url: "https://uscodex.org/cfr/40/434.52"
---

# §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.
- (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](/cfr/40/125.30-125.32.md), [40](/cfr/40/40.md) CFR 401.17 and §§ [434.61](/cfr/40/434.61.md), [434.62](/cfr/40/434.62.md) and [434.63](/cfr/40/434.63.md) 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:
  - (2) Except as provided in 40 CFR [125.30-125.32](/cfr/40/125.30-125.32.md), [40](/cfr/40/40.md) CFR 401.17, and §§ [434.61](/cfr/40/434.61.md) and [434.63](/cfr/40/434.63.md) 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:

## Notes

### Authority

Authority: 33 U.S.C. 1311 1314(b), (c), (e), and (g), 1316(b) and (c), 1317(b) and (c), and 1361.

### Source

Source: 50 FR 41305, Oct. 9, 1985, unless otherwise noted.