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RecommO ded Limiting Water Qualityloals for <br /> Components of Petroleum-Based Fuels <br /> Aromatic Hydrocarbons— <br /> Benzene 1.0 gg/l Primary MCL' <br /> Ethylbenzene 30 gg/l proposed Secondary MCL (EPA)' <br /> Toluene 40 gg/l proposed Secondary MCL (EPA) <br /> Xylene(s) 20 gg/l proposed Secondary MCL (EPA) <br /> AIiphatic and Phenolic Hydrocarbons— <br /> n-Hexane 400 µg/l EPA health advisory' <br /> Phenol fyFwaa snot hiorsaedpriormuse) 300 µg/l EPA NAWQC`based on taste and odor <br /> pf wata is dilo=ted prior to use) 5 µg/l DHS Action Level <br /> Hydrocarbon Mixtures— /9e 5mv RL. <br /> Diesel or Kerosenes 10 pg/l EPA4ieait�W <br /> Additives— <br /> Lead /y�i µg/1 d Primary MCL (EPA)' <br /> Ethylene dibromide (EDB) 0.02 µg/l Primary MCL <br /> Ethylene dichloride' 0.5 µg/l Primary MCL <br /> Methyl t-butyl ether (MTBE) 40 µg/l EPA health advisory <br /> Polynuclear Aromatic Hydrocarbons (PAHs or PNAs)— <br /> Carcinogenic PAI-Is' 0.0028 µg/l EPA NAWQC based on cancer risk <br /> Acenaphthene 20 pg/l EPA NAWQC based on taste and odor <br /> Fluoranthene 42 µg/l EPA NAWQC based on health effects <br /> Naphthalene 20 µg/l 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 /> 3 Secondary MCLS are based on taste and odor or other factors relating to human welfare. <br /> ' Health advisory=4000µg/l for_<10 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 400µg/l 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 /> havin disci adt�o�1,midpp�nis bel w than 450'F(i.e.,gasoline,naphthas,and military jet fuels). <br /> )• S. )tPNi�Jdve.s`i,l�.�rse�we/ <br /> ' 4�eel�ads�ory= 100µg/1 far_<ID 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 10µg/1 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 0.25µg/l. <br /> ' 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 /> JN 14 January 199V <br />