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Kini A. Schwab - 5 - 17 August 1998 <br /> Office of Environmental Health Hazard Assessment (OEHHA) <br /> Weighting Scheme for Polyaromatic Hydrocarbons (PAH's) <br /> Suggested <br /> PAH or derivative CAS number PEF <br /> benzo[a]pyrene 50-32-8 1.0 (index compound) <br /> benz[a]anthracene 56-55-3 0.1 <br /> benzo[b]fluoranthene 205-99-2 0.1 <br /> benzo[j]fluoranthene 205-82-3 0.1 <br /> benzo[k]fluoranthene 207-08-9 0.1 <br /> dibenz[a,j]acridine 224-42-0 0.1 <br /> dibenz[a,h]acridine 226-36-8 0.1 <br /> 7H-dibenzo[c,g]carbazole 194-59-2 1.0 <br /> dibenzo[a,h]pyrene 192-65-4 1.0 <br /> dibenzo[a,h]pyrene 189-64-0 10 <br /> dibenzo[a,i]pyrene 189-55-9 10 <br /> dibenzo[a,l]pyrene 191-30-0 10 <br /> indeno[l ,2,3-c,dlpyrene 193-39-5 0.1 <br /> 5-methylehrysene 3697-24-3 1.0 <br /> 1-nitropyrene 5522-43-0 0.1 <br /> 4-nitropyrene 57835-92-4 0.1 <br /> 1,6-dinitropyrene 42397-64-8 10 <br /> 1,8-dinitropyrene 42397-65-9 1.0 <br /> 6-nitrocrysene 7496-02-8 10 <br /> 2-nitrofluorene 607-57-8 0.01 <br /> chrysene 218-01-9 0.01 <br /> This weighting scheme for PAH's was developed by the Air Toxicology and <br /> Epidemiology Section (ATES) of the Office of Environmental Health Hazard Assessment <br /> (OEHHA) in the document entitled Health Effects of Benzo[a]pyrene. The nitro PAHs are those listed <br /> as IARC class 2B. Although chrysene is an IARC class 3 carcinogen, USEPA classifies it as B2. The <br /> justification for each PEF is detailed in Appendix A of the document entitled the <br /> Health Effects of Benzo[a]pyrene. <br /> These PEF's may be used for both inhalation and oral exposure pathways, although data used <br /> for their development was prioritized so inhalation exposure was given higher priority than other routes <br /> of exposure. '`'hen a specific potency value is developed for a chemical it should be used in place of <br /> the PEF. <br /> 11/01/94 <br />