RE: [CPEO-MEF] Lead Levels

[CPEO Moderator <cpeo@cpeo.org>]

[POSTED BY William Walsh (WALSHW@pepperlaw.com)]

The short cut answer to how the lead cleanup levels were derived is that 
model EPA uses correlates ingestion of lead with blood levels.  The 
acceptable blood levels are levels deemed safe for a fetus.  The model 
parameters are health-protective generic default assumptions.
Site-specific applications of the model has resulted in higher levels.

This model is unique to lead because few other chemicals have sufficient 
blood level, epidemiological data, pharmakinetic information, and 
exposure data to make the correlation possible.

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