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Title 40

Displaying title 40, up to date as of 9/08/2026. Title 40 was last amended 9/08/2026.
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§ 59.685 What symbols, acronyms, and abbreviations does this subpart use?

The following symbols, acronyms, and abbreviations apply to this subpart:

CFR Code of Federal Regulations

EPA Environmental Protection Agency

HC hydrocarbon

NIST National Institute of Standards and Technology

THC total hydrocarbon

U.S.C. United States Code