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TEL No Jul SU 'y( 17 1y IVO UZU r <br /> 1 <br /> Office of Environmental Health Hazard Assessment <br />' Weighting Scheme for Polyaromatic Hydrocarbons (YAH's) <br /> Suggested <br /> PAH or deal&= CAS numbsr PEF <br /> benzolalpyrene 50-32-8 10(index compound) <br /> benzla]anthracene 56-55-3 01 <br /> benzo[b]fluoranthenc 205-99-2 01 <br /> benzo[llfluoranthene 205-82-3 0 1 <br /> bciizo[kjfluoranthene 207-08-9 01 <br /> dibenz[ad]aendine 224-42-0 01 <br />' dibenz[a,h]acridinc 226-36-8 01 <br /> 7H-dibenzo[c,g}carbazole 194-59-2 10 <br /> diberizola,e]pyrene 192-65-4 1 U <br />' dibenzo[a,h]pyrene 189-64-0 10 <br /> dibenzo[a,i]pyrene 189-55-9 lu <br /> dibenzo[a,llpyrene 191-30-0 10 <br /> indenoli ,2,3-c,dlpyrent 193-39-5 01 <br /> 5-methylchrysene 3697-24-3 10 <br /> 1-nitropyrene 5522-43-U U 1 <br /> 4-nitropyrene 57835-92-4 01 <br /> 1.6-dinitropyrene 42397-64-8 10 <br /> 1,8-dinitropyrene 42397-65-9 1.0 <br /> 6-nitrocry5ene 7496-0248 10 <br /> 2-nitrofluorene 607-57-8 001 <br /> chrysene 2115-01-9 U U 1 <br /> 1 <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 /> (OEHI A)in the document entitled Health Effect';of Benzo[a]pyrene. The nitro PAH%are those <br /> listed as IARC class 213 Although chrysene is an IARC class 3 carcinogen, USEPA classifies it <br /> a%132 1 he ju%tification for cacti FhF is detailed in Appendix A of the document entitled the <br />' Health Effect;of Bento[a]pyrene <br /> These PEF'%may be used for both inhalation and oral exposure pathways, although data <br /> used for their developnicnt was prioritized so inhalation exposure wx..given higher priority than <br />' other routes of exposure When a specific potency value is.developed for a chemic al it should be <br /> used in place of the PEF <br /> iiroiroa <br />