Risk Analysis of TCDD Contaminated Soil
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This paper provides a methodology for estimating the human exposure and cancer risk associated with 2,3,7,8-TCDD contaminated soil. Five exposure pathways are addressed: dust inhalation, fish ingestion, dermal absorption, soil ingestion, and beef/dairy products ingestion. For each pathway, factors describing contact rate, absorption fraction, and exposure duration are presented along with the equations for calculating exposure levels and associated cancer risk. The methodology features the use of nomographs to provide quick and approximate estimates of risk. More detailed procedures are also provided for more accurate estimates.