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Regulations last checked for updates: May 01, 2025
Title 40 - Protection of Environment last revised: Nov 01, 2025
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Title 40
Chapter I
Part 116 - PART 116—DESIGNATION OF HAZARDOUS SUBSTANCES
View all text of Part 116 [§ 116.1 - § 116.4]
§ 116.2 - Abbreviations.
ppm = parts per million
mg = milligram(s)
kg = kilogram(s)
mg/l = milligrams(s) per liter= (approx.) ppm
mg/kg = milligram(s) per kilogram= (approx.) ppm
[43 FR 10474, Mar. 13, 1978]
authority:
33 U.S.C. 1251
cite as:
40 CFR 116.2
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