What are the allowable limits for lead and why are any allowable?

allowable lead limits
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What are the allowable limits for lead and why are any allowable?

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The Federal Government has set the limit for lead in surface coatings at 600ppm and soluble heavy metals at 90ppm. These have been identified as the upper limit at which previous testing has not shown any adverse affects to humans. However, many states set their allowable limits at 90ppm (all inclusive) and independent consumer groups have recommended the number as low 40ppm.

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