---
kind: "section"
citation: "40 C.F.R. § 421.294"
title: "40"
number: "421.294"
heading: "Standards of performance for new sources."
url: "https://uscodex.org/cfr/40/421.294"
---

# §421.294. Standards of performance for new sources.


Any new source subject to this subpart shall achieve the following new source performance standards:

- (a) **Tin smelter SO<I>2</I> scrubber.**
- (b) **Dealuminizing rinse.**
- (c) **Tin mud acid neutralization filtrate.**
- (d) **Tin hydroxide wash.**
- (e) **Spent electrowinning solution from new scrap.**
- (f) **Spent electrowinning solution from municipal solid waste.**
- (g) **Tin hydroxide supernatant from scrap.**
- (h) **Tin hydroxide supernatant from plating solutions and sludges.**
- (i) **Tin hydroxide filtrate.**

## Notes

### Source

Source: 50 FR 38376, Sept. 20, 1985, unless otherwise noted.

### Authority

Authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (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; 101 Stat. 7, Pub. L. 100-4.

### Source

Source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.