Wellhead

Wellhead means the piping, casing, tubing and connected valves protruding above the earth's surface for an oil and/or natural gas well. The wellhead ends where the flow line connects to a wellhead valve. Wellhead equipment includes all equipment, permanent and portable, located on the improved land area (i.e. well pad) surrounding one or multiple wellheads.

Source

40 CFR § 98.6

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Scoping language

All terms used in this part shall have the same meaning given in the Clean Air Act and in this section.

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