---
kind: "section"
citation: "43 C.F.R. § 3175.111"
title: "43"
number: "3175.111"
heading: "General sampling requirements."
url: "https://uscodex.org/cfr/43/3175.111"
---

# §3175.111. General sampling requirements.

- (a) Samples must be taken by one of the following methods:
  - (1) Spot sampling under [§§ 3175.113 through 3175.115](/cfr/43/3175.113..3175.115.md);
  - (2) Flow-proportional composite sampling under [§ 3175.116](/cfr/43/3175.116.md); or
  - (3) On-line gas chromatograph under [§ 3175.117](/cfr/43/3175.117.md).
- (b) At all times during the sampling process, the minimum temperature of all gas sampling components must be the lesser of:
  - (1) The flowing temperature of the gas measured at the time of sampling; or
  - (2) 30 °F above the calculated hydrocarbon dew point of the gas.

## Notes

### Source

Source: 81 FR 81609, Nov. 17, 2016, unless otherwise noted.

### Authority

Authority: 25 U.S.C. 396d and 2107; 30 U.S.C. 189, 306, 359, and 1751; and 43 U.S.C. 1732(b), 1733, and 1740.

### Source

Source: 81 FR 81421, Nov. 17, 2016, unless otherwise noted.