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Enviranmenta]f Technical Suppart Unit-(916)355=3bi5-Creat Tuesday, 13 June 1995 4:17 PM- Page 3 d 3 -- <br /> . .. ^------------------------ ------------ ----- -- �,____--____- ---------- <br /> Office of Environmental Health Hazard Assessment <br /> Weighting Scheme for Polyaromatic, Hydrocarbons (PAFrs) <br /> Suggested <br /> PAH or derivative CAS_ nr�mber PEF <br /> benzo[a]pyrene 50-32-8 10(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[atj]acridine 224-42-0 D.1 <br /> dibenz[a,h]acridine 226-36-8 0.1 <br /> 711-dibeuzo[c,g]carbazoie- 194-59-2 1.0 <br /> dibenzo[a,e]pYrens 192-65-4 1.0 <br /> dibenzo[a,h]pyrene 189-64-0 10 <br /> 10 <br /> diben.zo[a,i]pyrene 189-55-9 10 <br /> dibenzo[a,l]pyrene 191-30-0 <br /> indeno[1,2,3-c,d]pyrene 193-39-5 0.1 <br /> 5-methylchrysene 3697-243 1.0 <br /> 1-nitropyrene 5522-43-0 0.1 <br /> 4-0itropyrene 57835-92-4 0.1 <br /> 1,6-dinitropyrene 42397-648 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 develop by the Air Toxicology and <br /> Epidemiology Section(RTES)of the office of Enviro mental Health Hazard Assessment <br /> (oEHIA)in the document entitled Health Effects of I lenzo[alpyrene. The nitro PAHs are those <br /> listed as IARC class 2B. Although chrysene is an lA C class 3 carcinogen, USEPA classifies it <br /> as B2. 'Me justification for each.PEF is detailed in Appendix A of the document entitled the <br /> Health Effects of Benzo[a]pyrene. <br /> These PEFs may be used for both inhalation and oral exposure pathways, although data <br /> used for their development was prioritized so inhalation exposure was given higher priority than <br /> outer mutes of exposure_ When a specific potency va ue is developed for a chemical it should be <br /> used in place of the FEF. <br /> 1 UU1194 <br />