---
kind: "section"
citation: "40 C.F.R. § 60.166"
title: "40"
number: "60.166"
heading: "Test methods and procedures."
url: "https://uscodex.org/cfr/40/60.166"
---

# §60.166. Test methods and procedures.

- (a) In conducting performance tests required in [§ 60.8](/cfr/40/60.8.md), the owner or operator shall use as reference methods and procedures the test methods in appendix A of this part or other methods and procedures as specified in this section, except as provided in [§ 60.8(b)](/cfr/40/60.8.md?p=b).
- (b) The owner or operator shall determine compliance with the particulate matter, sulfur dioxide (SO2) and visible emission standards in §§ [60.162](/cfr/40/60.162.md), [60.163](/cfr/40/60.163.md), and [60.164](/cfr/40/60.164.md) as follows:
  - (1) Method 5 shall be used to determine the particulate matter concentration. The sampling time and sample volume for each run shall be at least 60 minutes and 0.85 dscm (30 dscf).
  - (2) The continuous monitoring system of [§ 60.165(b)(2)](/cfr/40/60.165.md?p=b-2) shall be used to determine the SO2 concentrations on a dry basis. The sampling time for each run shall be 6 hours, and the average SO2 concentration shall be computed for the 6-hour period as in [§ 60.165(c)](/cfr/40/60.165.md?p=c). The monitoring system drift during the run may not exceed 2 percent of the span value.
  - (3) Method 9 and the procedures in [§ 60.11](/cfr/40/60.11.md) shall be used to determine opacity.

## Notes

### Amendments

[54 FR 6668, Feb. 14, 1989]

### Source

Source: 41 FR 2338, Jan. 15, 1976, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[54 FR 6668, Feb. 14, 1989]