PPM stands for which measurement?

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Prepare for the US EPA Model Lead Inspector Test. Study with flashcards and multiple choice questions. Each question includes hints and explanations for better understanding. Ace your exam!

Multiple Choice

PPM stands for which measurement?

Explanation:
PPM is a unit of concentration describing how much of a substance is present per one million parts of the sample. It’s used for very small amounts, and in water-related contexts, 1 mg/L is effectively the same as 1 ppm because water’s density is close to 1 g/mL. The other options don’t fit as a measurement unit: parts per billion is a smaller unit, the Resource Conservation and Recovery Act is a waste-management law, and atomic absorption spectrometry is a measurement technique, not a unit.

PPM is a unit of concentration describing how much of a substance is present per one million parts of the sample. It’s used for very small amounts, and in water-related contexts, 1 mg/L is effectively the same as 1 ppm because water’s density is close to 1 g/mL. The other options don’t fit as a measurement unit: parts per billion is a smaller unit, the Resource Conservation and Recovery Act is a waste-management law, and atomic absorption spectrometry is a measurement technique, not a unit.

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