Permitted level of lead chromate
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ATSDR has not derived MRLs for lead. The EPA has not developed a reference concentration (RfC) for
lead. EPA has also decided that it would be inappropriate to develop a reference dose (RfD) for inorganic
lead (and lead compounds) because some of the health effects associated with exposure to lead occur at
blood lead levels as low as to be essentially without a threshold (IRIS 2005).
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