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Parts Per Trillion

A part per trillion (ppt) is a measurement of the quantity of a substance in the air, water or soil. A concentration of one part per trillion means that there is one part of that substance for every one trillion parts of either air, water or soil in which it is contained. One part per trillion is... View Full Term
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Eric Gislason

Executive Director NASP

Safeopedia provides a platform for EHS professionals to learn, collaborate, have access to FREE content, and feel supported. PUBLICATON + AGENCY + EXISTING GLOBAL AUDIENCE + SAFETY