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Kim A. Schwab • - 3 - • 17 August 1998 <br /> RECOMMENDED LIMITS IN WATER FOR PETROLEUM-BASED FUEL COMPONENTS <br /> TO PROTECT THE BENEFICIAL USE OF MUNICIPAL AND DOMESTIC SUPPLY <br /> Aromatic Hydrocarbons— <br /> Benzene 1.0 µg/1 California Primary MCL' <br /> 0.35 µg/1 1-in-a-million incremental cancer risk level(0EHHA)2 <br /> n-Butylbenzene 45 µg/1 California Drinking Water Action Level(DHS) <br /> Ethylbenzene 700 µg/1 California and USEPA Primary MCL' <br /> 29 µg/1 Taste and odor threshold(USEPA)3 <br /> Toluene 150 µg/1 California Primary MCL' <br /> 42 µg/1 Taste and odor threshold(USEPA)3 <br /> Xylenes (sum of isomers) 1750 µg/1 California Primary MCL' <br /> 17 µg/1 Taste and odor threshold(USEPA)3 <br /> Aliphatic Hydrocarbons— <br /> n-Hexane 400 µg/1 USEPA Health Advisory° <br /> 6.4 µg/1 Taste and odor threshold 12 <br /> Hydrocarbon Mixtures— <br /> Diesel or Kerosene 100 µg/1 Taste and odor threshold(USEPA) <br /> Gasoline 5 µg/1 Taste and odor threshold(SWRCB)6 <br /> Additives— <br /> Lead 15 µg/1 USEPA Drinking Water Action Levef <br /> 2 µg/1 California Public Health Goal in drinking water(OEHHA) <br /> Ethylene dibromide (EDB) 0.05 ggd California and USEPA Primary MCL' <br /> 0.0097 µg/1 1-in-a-million incremental cancer risk level(OEHHA)2 <br /> Ethylene dichloride' 0.5 µg/1 California Primary MCLI <br /> 7000 µg/1 Taste and odor threshold 12 <br /> Methyl t-butyl ether(MtBE) 35 µg/I California Drinking Water Action Level(DHS) <br /> 14 µg/1 draft California Public Health Goal in drinking water(OEHHA) <br /> 5 µg/1 draft California Secondary MCL <br /> Polynuclear Aromatic Hydrocarbons (PAHs or PNAs)— <br /> Carcinogenic PAHs9 0.0029µg/1 1-in-a-million incremental cancer risk level(OEHHA)2 <br /> Acenaphthene 420 gg/l USEPA IRIS reference dose" <br /> 20 µg/1 USEPA NAWQC10(taste and odor) <br /> Anthracene 2100 µg/1 USEPA IRIS reference dose'1 <br /> Benzo(a)pyrene 0.2 µg/1 California and USEPA Primary MCLI <br /> 0.0029 µg/1 I-in-a-million incremental cancer risk level(OEHHA)2 <br /> Dibenz(a,h)antbracene 0.0085 µg/1 1-in-a-million incremental cancer risk level(OEHHA)2 <br /> Naphthalene 20 µg/1 USEPA Health Advisory <br /> 21 µg/1 Taste and odor threshold12 <br /> Footnotes are listed on the next page. <br />