40 CFR 1065.265
§ 1065.265 Nonmethane cutter.
United States · 40 CFR — Protection of Environment · Status: effective
Cite this
- Citation
- 40 CFR 1065.265, § 1065.265 Nonmethane cutter, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/195709
- Permanent ID
ys:prov:195709@1- SHA-256
fb9d5121d4bd212355783e0e0d53355b1f88cd3f03070e9d5335fdf53d88caa0
The hash is SHA-256 of this version's text, with every run of whitespace collapsed to a single space and the ends trimmed. The ID always leads back here, and checking it says whether the text you cited is still the current version.
Full text
(a) Application. You may use a nonmethane cutter to measure CH4 with a FID analyzer. A nonmethane cutter oxidizes all nonmethane hydrocarbons to CO2 and H2O. You may use a nonmethane cutter for raw or diluted exhaust for batch or continuous sampling.
(b) System performance. Determine nonmethane-cutter performance as described in § 1065.365 and use the results to calculate CH4 or NMHC emissions in § 1065.660.
(c) Configuration. Configure the nonmethane cutter with a bypass line if it is needed for the verification described in § 1065.365.
(d) Optimization. You may optimize a nonmethane cutter to maximize the penetration of CH4 and the oxidation of all other hydrocarbons. You may humidify a sample and you may dilute a sample with purified air or oxygen (O2) upstream of the nonmethane cutter to optimize its performance. You must account for any sample humidification and dilution in emission calculations.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.