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Recomn*ded Limiting Water Quality*oals for <br /> Components of Petroleum-Based Fuels <br /> Aromatic Hydrocarbons— <br /> Benzene 1.0 gg/1 Primary MCL' <br /> Ethylbenzene 30 gg/1 proposed Secondary MCL (EPA)' <br /> Toluene 40 gg/1 proposed Secondary MCL (EPA) <br /> Xylene(s) 20 gg/l proposed Secondary MCL (EPA) <br /> Aliphatic and Phenolic Hydrocarbons— <br /> n-Hexane 400 gg/l EPA health advisory' <br /> Phenol (if Water isnot chlomatedpriortou ) 300 gg/l EPA NAWQC`basedontaste and odor <br /> (if water is chlorinated prior to use, 5 gg/1 DHS Action Level <br /> Hydrocarbon Mixtures— <br /> Diesel or Kerosenes 10 gg/1 EPA health advisory' <br /> Additives— <br /> Lead 5 pg/1 proposed Primary MCL (EPA)' <br /> Ethylene dibromide (EDB) 0.02 gg/1 Primary MCL <br /> Ethylene dichloride' 0.5 gg/l Prima.v MCL <br /> Methyl t-butyl ether (MTBE) 40 4g/1 EPA health advisory <br /> Polynuclear Aromatic Hydrocarbons (PAHs or PNAs)— <br /> Carcinogenic PAI-Is' 0.0028 gg/l EPA NAWQC based on cancer risk <br /> Acenaphthene 20 gg/l EPA NAWQC based on taste and odor <br /> Fluoranthene 42 gg/l EPA NAWQC based on health effects <br /> Naphthalene 20 gg/1 EPA health advisory <br /> ' Primary MCLS are based on health effects data,but contain other information relating to technical and <br /> economic feasibility of attainment in a water distribution system. <br /> 1 Secondary MCLS are based on taste and odor or other factors relating to human welfare. <br /> ' Health advisory=4000 gg/l for 510 day exposure. No lifetime exposure advisory has been developed. <br /> However,lifetime advisories are normally at least ten-fold lower than 10-day advisories. Therefore,a <br /> level of 400 gg/1 should be used as an estimate of a lifetime protective level for n-hexane. <br /> National Ambient Water Quality Criterion. <br /> ' May be sufficiently protective for other mixtures having distillation midpoints at or above 450°F(i.e., <br /> commercial jet fuels,light heating oils,gas oils,heavy fuel oil,etc.). Should not be used for mixtures <br /> having distillation midpoints below than 450°F(i.e.,gasoline,naphthas,and military jet fuels). <br /> a Health advisory= 100 gg/1 for<IO day exposure. No lifetime exposure advisory has been developed. <br /> However,lifetime advisories are normally at least ten-fold lower than 10-day advisories. Therefore,a <br /> level of 10 gg/l should be used as an estimate of a lifetime protective level for diesel and kerosene. <br /> ' Liability under Proposition 65 may exist for responsible parties where levels in water exceed 0.25 pg/l. <br /> a Also know as 1,2dichloroethane. <br /> For the sum of benz(a)anthracene,benzo(b)fluoranthene,benzo(k)fluoranthene,benzo(a)pyrene, <br /> chrysene,dibenz(a,h)anthracene,indeno(1,2,3-c,d)pyrene and possibly acenaphthylene and <br /> phenanthrene. <br /> JM 14 January 1990 <br />