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•I advised: the Agency for Toxic Substances & Disease Registry (ATSDR) in the US had in 1995 determined lead to be the top priority substance in public health terms so why not link to the ATSDR website instead?
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•CERCLA (developed under the Comprehensive Environmental Response, Compensation and Liability Act) Priority List of Hazardous Substances places 4 heavy metals (all of
which are found in ceiling dust) in the top 7 of 275 ranked priority
toxic substances.