Natural gas

Natural gas means a naturally occurring mixture of hydrocarbon and non-hydrocarbon gases found in geologic formations beneath the Earth's surface, of which the principal constituent is methane. Natural gas may be field or pipeline quality.

Source

40 CFR § 60.4248

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Scoping language

As used in this subpart, all terms not defined herein shall have the meaning given them in the CAA and in subpart A of this part.

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