CHEMICAL PROFILES|References for U.S. EPA Risk Assessment Values

EDF-EPA: Some PCB and dioxin congeners have been assigned potencies based on application of International Toxic Equivalency Factors (ITEFs) to EPA potency values for 2,3,7,8-TCDD:
Van den Berg et al., 1998. Toxic Equivalency Factors (TEFs) for PCBs, PCDDs, PCDFs for humans and wildlife. Environmental Health Perspective, 106 (12), 775-792.
Ahlborg, U; Becking, GC; Birnbaum, LS; et al., 1994. Toxic equivalency factors for dioxin-like PCBs: report on a WHO-ECEH and IPCS consultation, Dec. 1993. Chemosphere 28(6):1049-1067.

The polycyclic organic matter chemical grouping has been assigned an inhalation cancer potency based on: Interim methodology to give estimates of potency for Cumulative Exposure Project POM inventories. August 5, 1998 Memorandum from JC Caldwell (OAQPS/OAR) to TJ Woodruff and DA Axelrad (Office of Policy).

HEAST: EPA, Office of Research and Development. Health Effects Assessment Summary Tables. July 1997.

IRIS: EPA, National Center for Environmental Assessment. Integrated Risk Information System.

OPP-CAN: EPA, Office of Pesticide Programs. List of Chemicals Evaluated for Carcinogenic Potential (5/10/2002). OPP, Washington, DC.

OPP-RfD: US EPA, Office of Pesticide Programs. RfD Tracking Report (2/97). OPP, Washington, DC. Obtained as an electronic file (ProdVol.dbf); available online at

SCDM: EPA, Office of Emergency Response and Remediation. Superfund Chemical Data Matrix.