40 CFR § 116.2
Abbreviations
June 9, 2020
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]
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