---
kind: "section"
citation: "40 C.F.R. § 421.334"
title: "40"
number: "421.334"
heading: "Standards of performance for new sources."
url: "https://uscodex.org/cfr/40/421.334"
---

# §421.334. Standards of performance for new sources.


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

- (a) **Sand drying wet air pollution control.**
- (b) **Sand chlorination off-gas wet air pollution control.**
- (c) **Sand chlorination area-vent wet air pollution control.**
- (d) **SiC<I>14</I> purification wet air pollution control.**
- (e) **Feed makeup wet air pollution control.**
- (f) **Iron extraction (MIBK) steam stripper bottoms.**
- (g) **Zirconium filtrate.**
- (h) **Hafnium filtrate.**
- (i) **Calcining caustic wet air pollution control.**
- (j) **Pure chlorination wet air pollution control.**
- (k) **Reduction area-vent wet air pollution control.**
- (l) **Magnesium recovery off-gas wet air pollution control.**
- (m) **Magnesium recovery area-vent wet air pollution control.**
- (n) **Zirconium chip crushing west air pollution control.**
- (o) **Acid leachate from zirconium metal production.**
- (p) **Acid leachate from zirconium alloy production.**
- (q) **Leaching rinse water from zirconium metal production.**
- (r) **Leaching rinse water from zirconium alloy production.**

## Notes

### Source

Source: 50 FR 38395, 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.