Quiz: Prop 65 Safe-Harbor Levels (NSRL and MADL)

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1. Q1.What is a Prop 65 'safe harbor' level?

   AA place to store chemicalsBAn exposure level below which no warning is requiredCA type of cancerDA tax exemption

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2. Q2.How is the No Significant Risk Level (NSRL) for carcinogens defined?

   AZero exposureBNo more than 1 extra cancer per 100,000 people over a 70-year lifetimeC1 extra cancer per 100 peopleDIt has no definition

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3. Q3.What is the MADL used for?

   ACarcinogensBReproductive toxicants, set at 1/1,000th of the no-observable-effect levelCAir pollutionDRadiation

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4. Q4.Why do warnings still appear widely despite safe-harbor levels?

   ABecause everything is highly toxicBBecause many chemicals lack official levels and businesses warn defensivelyCBecause the levels are ignored by lawDBecause California requires warnings on everything

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This quiz checks understanding of educational content only. It is not medical advice. Read: Prop 65 Safe-Harbor Levels (NSRL and MADL).