40 CFR § 436.185 - Standards of performance for new sources.

---
identifier: "/us/cfr/t40/s436.185"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 436.185 - Standards of performance for new sources."
title_number: 40
title_name: "Protection of Environment"
section_number: "436.185"
section_name: "Standards of performance for new sources."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "436"
part_name: "MINERAL MINING AND PROCESSING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 301, 304 (b) and (c), Federal Water Pollution Control Act, as amended (33 U.S.C. 1251, 1311, 1314 (b) and (c), 86 Stat. 816  Pub. L. 92-500) (the Act)."
regulatory_source: "40 FR 48657, Oct. 16, 1975, unless otherwise noted."
cfr_part: "436"
---


# 436.185 Standards of performance for new sources.

(a) Subject to the provisions of paragraph (b) of this section, the following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available demonstrated control technology.

(1) Discharges of process generated waste water and mine dewatering discharges, shall not exceed the following limitations:

|  |  |  |
| --- | --- | --- |
| TSS | 60 mg/l | 30 mg/l. |
| pH | () | () |
| Within the range 6.0 to 9.0. |  |  |

(b) Any overflow from facilities governed by this subpart shall not be subject to the limitations of paragraph (a) of this section if the facilities are designed, constructed and maintained to contain or treat the volume of waste water which would result from a 10-year 24-hour precipitation event.

[43 FR 9810, Mar. 10, 1978]