40 CFR § 434.62 - Alternate effluent limitation for pH.

---
identifier: "/us/cfr/t40/s434.62"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 434.62 - Alternate effluent limitation for pH."
title_number: 40
title_name: "Protection of Environment"
section_number: "434.62"
section_name: "Alternate effluent limitation for pH."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "434"
part_name: "COAL MINING POINT SOURCE CATEGORY BPT, BAT, BCT LIMITATIONS AND NEW SOURCE PERFORMANCE STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1311 1314(b), (c), (e), and (g), 1316(b) and (c), 1317(b) and (c), and 1361."
regulatory_source: "50 FR 41305, Oct. 9, 1985, unless otherwise noted."
cfr_part: "434"
---


# 434.62 Alternate effluent limitation for pH.

Where the application of neutralization and sedimentation treatment technology results in inability to comply with the otherwise applicable manganese limitations, the permit issuer may allow the pH level in the final effluent to exceed 9.0 to a small extent in order that the manganese limitations can be achieved.