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Tri-Regional Recommendations Page 7 of 24 Appendix A Table 9 Water Quality Numerical Limits for Petroleum Fuel Mixtures,Constituents and Additives Water Quality I Numerical Limit Interprettng Water Quality Objective Constituent Objective a Source Limit Units Aromatic Hydrocarbons Benzene Chemical Constituents California Prima MCL b 10 u L Toxicity California Public Health Goal OEHHA 015 u L Tastes and Odors Amoore and Hautala J Apphed Tox Vol 3 No 6 1983 170 ugIL n-But lbenzene Toxicity California Drinking Water Action Level(DHS) 260 u IL sec-But lbenzene Toxicity_ California Drinking Water Action Level OHS 260 u IL tert-Butylbenzene Toxicity California Drinking Water Action Level DHS 260 u /L Ethylbenzene Chemical Constituents California Prima MCL b 300 u IL Toxicity California Public Health Goal OEHHA 300 u L Tastes and Odors Federal Register Vol 54 No 97 ep 22138 22439 29 u IL Isopropyl benzene Toxicity USEPA IRIS Reference Dose i 700 u IL Tastes and Odors Amoore and Hautala J Applied Tox Vol 3 No 6 1983 0 8 u IL Toluene Chemical Constituents California Prima MCL b 150 49/L Toxicity California Public Health Goal OEHHA 150 u IL Tastes and Odors Federal Register Vol 54 No 97 pp 22138 22139 42 u 1L 1 2 4 Trimethylbenzene Toxicity California Public Health Goal OEHHA 330 u /L Tastes and Odors Amoore and Hautala J Applied Tox Vol 3 No 6 1983 15 a 1L 13 5-Tnmethylbenzene Toxicity California Public Health Goal OEHHA 330 -E21L Tastes and Odors Amoore and Hautala J Applied Tox Vol 3 No 6 1983 15 u IL Xylenes(sum of isomers) Chemical Constituents California Prima MCL b 1750 u IL Toxicity i California Public Health Goal OEHHA 1800 1u 1L Tastes and Odors lFederal Register Vol 54 No 97 pp 22138 22139 17 u IL Aliphatic Hydrocarbons n Hexane Toxics USEPA Health Advisory a 400 u IL Tastes and Odors I Amoore and Hautala J Applied Tox Vol 3 No 6 19831 6 4 1 ugil- Hydrocarbon Mixtures Diesel or Kerosene Toxicity USEPA Superfund Provisional Reference Dose i 56-140 u 1L Tastes and Odors Taste&odor threshold from USEPA Health Advisoal 100 u lL Gasoline Toxicity USEPA Su erfund Provisional Cancer Sloe Factor c 21 u lL Tastes and Odors McKee&Wolf Water Quahty Cntena SWRCB p 230 5 u lL Additives Lead Chemical Constituents California Prima MCL b 15 u /L Toxics h California Public Health Goal OEHHA 2 u L Ethylene dibromide(EDB) Chemical Constituents California Prima MCL b 005 u lL Toxicity California Public Health Goal OEHHA 0 01 u lL Ethylene dichloride Chemical Constituents California Prima MCL b 0 5 u lL (1 2 Dichloroethane) Toxicity California Public Health Goal OEHHA 0 4 u lL Tastes and Odors Amoore and Hautala J Applied Tax Vol 3 No 6 1983 7000 u lL Methyl t-butyl ether(MtBE) Chemical Constituents California Prima MCL b 13 u lL Chemical Constituents California Seconds MCL 5 u lL ToxicityCalifornia Public Health Goal OEHHA 13 u IL Tastes and Odors California Seconds MGL 5 u lL Di iso ro I ether DIPS Tastes and Odors Amoore and Hautala J Applied Tox Vol 3 No 6 1983 0 8 u IL t Butyl alcohol(TBA) Toxics California DrinkingWater Action Level(DHS) 12 u lL Tastes and Odors Amoore and Hautala J Applied Tox Vol 3 No 6 1983 290 000 u IL Ethanol Tastes and Odors Amoore and Hautala J Applied Tox Vol 3 No 6 1983 760 000 u lL Methanol Toxics USEPA IRIS Reference Dose i 3500 u L Tastes and Odors Amoore and Hautala J Applied Tox Vol 3 No 6 1983 740 ODD u L No pokey or reg"IQUon is expressed or intended Jon Marshack CVRWQCB 1 Apnl 2004