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~ Beneficial 0 Protective Numerical Limits in GrOnd Water <br /> to Protect Municipal and Domestic Supply <br /> Constituents of Concern I Limit Unit IType/ Reference <br /> Aromatic Hydrocarbons— <br /> Benzene 0.35 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> n-Butylbenzene 45 pg/I California Drinking Water Action Level (DHS) <br /> Ethylbenzene 29 pg/I Taste and odor threshold (USEPA) <br /> Toluene 42 pg/I Taste and odor threshold (USEPA) <br /> Xylenes (sum of!some 17 pg/I Taste and odor threshold (USEPA) <br /> Aliphatic Hydrocarbons— <br /> n-Hexane 400 pg/l USEPA Health Advisory <br /> Hydrocarbon Mixtures— <br /> Diesel or Kerosene 100 pg/I Taste and odor threshold (USEPA) <br /> Gasoline 5 pg/I Taste and odor threshold (SWRCB) <br /> Polynuclear Aromatic Hydrocarbons (PAHs or PNAs)— <br /> Carcinogenic PAHs <br /> benzo[a]pyrene 0.0029 pg/1 1-in-a-million incremental cancer risk level (OEHHA) <br /> benz[a]anthracene 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> benzo[b]fluoranthene 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> benzo[j]fluoranthene 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> benzo[k]fluoranthene 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> dibenz[a,j]acridine 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> dibenz[a,h]acridine 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 7H-dibenzo(c,g]carbaz 0.0029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> Dibenz(a,h)anthracene 0.0085 pg/l 1-in-a-million incremental cancer risk level (OEHHA) <br /> dibenzo[a,e]pyrene 0.0029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> dibenzo[a,h]pyrene 0.00029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> dibenzo(a,i]pyrene 0.00029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> dibenzo[a,l]pyrene 0.00029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 7,12-Dimethylbenz(a)a 0.00014 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> indeno[I ,2,3-c,djpyren 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 5-inethylchrysene 0.0029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 1-nitropyrene 0.029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 4-nitropyrene 0.029 p9/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 1,6-dinitropyrene 0.00029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 1,8-dinitropyrene 0.0029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 6-nitrocrysene 0.00029 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> 2-nitrofluorene 0.29 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> chrysene 0.29 pg/I 1-in-a-million incremental cancer risk level (OEHHA) <br /> Non-carcinogenic PAHs <br /> Acenaphthene 20 pg/I USEPA NAWQC (taste and odor) <br /> Acenapthylene 420 pg/l USEPA IRIS reference dose <br /> Anthracene 2100 pg/I USEPA IRIS reference dose <br /> Benzo(a)pyrene 0.2 pg/I California and USEPA Primary MCL <br /> Fluorene 280 pg/I USEPA IRIS reference dose <br /> Naphthalene 20 pg/I USEPA Health Advisory <br /> Pyrene 210 pg/I USEPA IRIS reference dose <br /> CVRWQCB Attachment 3 Jon Marshack, 12/12/95 <br />