Volume 4: Development of Fraction Specific Reference Doses (RfD's) and Reference Concentration (RfC's) for Total Petroleum Hydrocarbons
by D.A.Edwards; M.D.Andriot, M.A.Amoruso; A.C.Tummey; C.J.Bevan; A.Tveit; L.A.Hayes; S.H.Youngren; D.V.Nakles
1997, pp.137 ISBN 1-884-940-13-7
The overlying theme to this series is the importance of exposure potential when defining human health risk. The fate and transport of a chemical or mixture defines the exposure route, and in conjunction with receptor properties, concentrations at receptors. If fate and transport is not considered, unrealistic human health risks could be calculated, resulting in misinformed decisions about site clean-up and regulatory guidance. We hope you find these documents to be useful in your efforts to evaluate and determine acceptable risk-based criteria at petroleum sites.
To complete the risk-based approach, the Working Group has also selected toxicity criteria (e.g., Reference Doses) for each of the defined fate and transport fractions. The evaluation of the toxicology research database and rationale behind the toxicity criteria selected is described in detail in Volume 4. The group selected the American Society for testing And Materials (ASTM) Risk Based Corrective Action - RBCA framework as an example of how these elements can be used to calculate risk-based screening levels driven by non-cancer human health risk for petroleum contaminated sites.