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i TABLE F1YE Summary of Chemical Analysis of GFOUNDWATER for Chevron # 9-8632 Samples West Grant Line Road, Tracy, Callfornla DATE TFH TPH Ethyl Total Well I D SAMPLED 016561 Gasoline Benzene Toluene benzene Xylenes MTBE MW-5 4/30/02 240 560 <0 5 <05 2 20 <2 7/30102 210 < 50 <05 <05 <05 <05 <2 10/31/02 220 < 50 <05 <05 <05 <05 <2 1130103 530 <50 <05 <05 <05 <05 <2 4130103 790 < 50 <05 <05 <05 <05 <2 7130/03 540 99 1 <0 5 09 <05 <2 10/29/03 <50 < 50 <05 <05 <05 <05 <2 1126104 <50 <50 <05 07 <05 06 < 2 4/27/04 51 <50 <05 <05 <05 <05 <2 MW-6A 4130/02 350 310 <0 5 <05 O 5 <0 5 4 7/30102 <50 71 <05 <05 <05 <05 3 10/31/02 <130 < 50 <05 <05 <05 <05 7 1130/03 <50 < 50 <05 <05 <O 5 <0 5 26 4130/03 <50 <50 <05 <05 <05 <05 16 7130103 < 50 < 50 <05 <05 <05 <05 9 10129103 < 50 < 50 <05 <05 <05 <05 5 1/26/04 <50 <50 <05 05 <05 O 6 3 4/27/04 <50 <50 <05 0 5 <05 <05 23 MW-65 4130102 <50 <50 <05 <05 <05 <05 <2 7130102 280 220 <0 5 06 <05 12 <2 10131102 < 50 <50 <05 <05 <05 <05 <2 1130/03 490 <50 <05 <05 <0 5 <0 5 <2 4130/03 <50 <50 <05 <05 <05 <05 <2 7130/03 < 50 <50 <05 <05 <05 <05 <2 10/29/03 <50 <50 <05 <05 <05 <05 <2 1126/04' <50 <50 <05 <05 <05 <05 <2 4127104 <50 <50 <05 <05 <05 <05 <2 MW-7 4130/02 530 1 300 27 3 58 72 <2 7/30/02 < 50 430 21 <O 5 75 <0 5 <2 10/31/02 130 690 <05 <05 <05 <05 <2 1/30/03 96 200 12 <05 8 8 <2 4130/03 86 550 36 2 51 17 <2 7/30/03 250 290 17 05 27 4 <2 10/29/03 160 390 19 05 18 2 <2 1126104 300 150 19 <05 2 0 8 <2 4127104 72 53 0& <05 2 1 <2 DNS MCL _ _ _ -NE _ NE 1 - 156 _ _ 700 1,750 13 Notes Non-detectable concentrations are noted by the 1655 than Symbol(<} followed by the detection limit Current analytical data i5 in bold DH5 Ma is the California Department of Health 5ervices maximum contaminant level for drinking water ND=Not Detected above laboratory detection limits NE=DH5 MCLS are rot eotabh5hed MTBE=Methyl tert-butyl-ether -=Compound not anaylzed for 12 DCA Detected at 4ppb