---
kind: "section"
citation: "43 C.F.R. § 3175.119"
title: "43"
number: "3175.119"
heading: "Components to analyze."
url: "https://uscodex.org/cfr/43/3175.119"
---

# §3175.119. Components to analyze.

- (a) The gas must be analyzed for the following components:
  - (1) Methane;
  - (2) Ethane;
  - (3) Propane;
  - (4) Iso Butane;
  - (5) Normal Butane;
  - (6) Pentanes;
  - (7) Hexanes + (C6+);
  - (8) Carbon dioxide; and
  - (9) **Nitrogen.**
- (b) When the concentration of C6+ exceeds 0.5 mole percent, the following gas components must also be analyzed:
  - (1) Hexanes;
  - (2) Heptanes;
  - (3) Octanes; and
  - (4) **Nonanes +.**
- (c) In lieu of testing each sample for the components required under [paragraph (b)](#b) of this section, the operator may periodically test for these components and adjust the assumed C6+ composition to remove bias in the heating value (see [§ 3175.126(a)(3)](/cfr/43/3175.126.md?p=a-3)). The C6+ composition must be applied to the mole percent of C6+ analyses until the next analysis is done under [paragraph (b)](#b) of this section. The minimum analysis frequency for the components listed in [paragraph (b)](#b) of this section is as follows:
  - (1) For high-volume FMPs, once per year; and
  - (2) **For very-high-volume FMPs, once every 6 months.**

## 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.