---
kind: "section"
citation: "40 C.F.R. § 434.25"
title: "40"
number: "434.25"
heading: "New source performance standards (NSPS)."
url: "https://uscodex.org/cfr/40/434.25"
---

# §434.25. New source performance standards (NSPS).


The following new source performance standards (NSPS) shall be achieved by any new source coal preparation plant and coal preparation plant associated areas, as indicated:

- (a) Except as provided in [40 CFR 401.17](/cfr/40/401.17.md) 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 new source performance standards shall apply to discharges from new source coal preparation plants and new source coal preparation plant associated areas, if such discharges normally exhibit a pH of less than 6.0 prior to treatment:
- (b) Except as provided in [40 CFR 401.17](/cfr/40/401.17.md) 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 new source performance standards shall apply to discharges from new source coal preparation plants and new source coal preparation plant associated areas, if such discharges normally exhibit a pH equal to or greater than 6.0 prior to treatment:

## 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.