---
kind: "section"
citation: "40 C.F.R. § 60.642"
title: "40"
number: "60.642"
heading: "Standards for sulfur dioxide."
url: "https://uscodex.org/cfr/40/60.642"
---

# §60.642. Standards for sulfur dioxide.

- (a) During the initial performance test required by [§ 60.8(b)](/cfr/40/60.8.md?p=b), each owner or operator shall achieve at a minimum, an SO2 emission reduction efficiency (Zi) to be determined from table 1 based on the sulfur feed rate (X) and the sulfur content of the acid gas (Y) of the affected facility.
- (b) After demonstrating compliance with the provisions of [paragraph (a)](#a) of this section, the owner or operator shall achieve at a minimum, an SO2 emission reduction efficiency (Zc) to be determined from table 2 based on the sulfur feed rate (X) and the sulfur content of the acid gas (Y) of the affected facility.

## Notes

### Source

Source: 50 FR 40160, Oct. 1, 1985, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.