---
kind: "section"
citation: "40 C.F.R. § 464.15"
title: "40"
number: "464.15"
heading: "Pretreatment standards for existing sources."
url: "https://uscodex.org/cfr/40/464.15"
---

# §464.15. Pretreatment standards for existing sources.


Except as provided in 40 CFR [403.7](/cfr/40/403.7.md) and [403.13](/cfr/40/403.13.md), any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with [40 CFR part 403](/cfr/40/part403.md) and achieve the following pretreatment standards for existing sources.

- (a) **Casting Cleaning Operations.**
- (b) **Casting Quench Operation.**
- (c) **Die Casting Operations.**
- (d) **Dust Collection Scrubber Operations.**
- (e) **Grinding Scrubber Operations.** No discharge of process wastewater pollutants to a POTW.
- (f) **Investment Casting.**
- (g) **Melting Furnace Scrubber Operations.**
- (h) **Mold Cooling Operations.**

## Notes

### Amendments

[50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]

### Authority

Authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307, 308, and 501 of the Clean Water Act (Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e) and (g), 1316 (b) and (c), 1317 (b) and (c), 1318, and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

### Source

Source: 50 FR 45247, Oct. 30, 1985, unless otherwise noted.

### Amendments

[50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]