---
kind: "section"
citation: "40 C.F.R. § 60.75a"
title: "40"
number: "60.75a"
heading: "Calculations."
url: "https://uscodex.org/cfr/40/60.75a"
---

# §60.75a. Calculations.

- (a) You must calculate the 30 operating day rolling arithmetic average emissions rate in units of the applicable emissions standard (lb NOX/ton 100 percent acid produced) at the end of each operating day using all of the quality assured hourly average CEMS data for the previous 30 operating days.
- (b) You must calculate the 30 operating day average emissions rate according to Equation 1:

## Notes

### Amendments

[77 FR 48445, Aug. 14, 2012; 79 FR 25681, May 6, 2014]

### Source

Source: 77 FR 48445, Aug. 14, 2012, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[77 FR 48445, Aug. 14, 2012; 79 FR 25681, May 6, 2014]