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United States Environmental Protection Agency (USEPA) (1989) Risk Assessment <br /> Guidance for Superfund Volume I Human Health Evaluation Manual (Part A) Interim <br /> Final December, 1989 <br /> United States Environmental Protection Agency (USEPA) (1990) PCGEMS User's Guide <br /> Release 1.0 U.S. Environmental Protection Agency, Office of Pesticides and Toxic <br /> Substances Exposure Evaluation Division Prepared by General Sciences Corporation, 6100 <br /> Chevy Chase Drive, Laurel, Maryland 20707 Contract No 68024281, Task No 2-28 GSC- <br /> TR-32-90-008 April, 1990 <br /> c WMlnsAWAM FNLXb M M 93 7-2 chm,auN 1v3 <br />