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TABLE FIVE Summary of Chemical Analysis of GROUNDWATER for Chevron # 9-8632 Samples West Grant Line Road, Tracy, California DATE TPH TPH Ethyl Total Well 11 SAMPLED Diesel Gasoline Benzene Toluene Benzene Xylenes MT$E MW 6B 4/30/02 <50 <50 <0 5 <0 5 <0 5 <0 5 <2 7/30/02 280 220 <0 5 06 <0 5 12 <2 10/31/02 <50 <50 <05 <05 <05 <05 <2 1/30/03 490 <50 <05 <05 <05 <05 <2 4/30/03 <50 <50 <05 <05 <05 <05 <2 7/30/03 <50 <50 <05 <05 <05 <05 <2 10/29/03 <50 <50 <05 <05 <05 <05 <2 1/26/04' <50 <50 <05 <05 <05 <05 <2 4/27/04 <50 <50 <05 <05 <05 <05 <2 7/30/04 <50 <50 <05 <05 <05 <05 <2 10/28/04 <50 <50 <05 <05 <05 <0S <2 1/31/05 <50 <50 <05 <05 <05 <05 <2 4/29/05 <50 <50 <05 <05 <05 <05 <2 7/29/05 <50 <50 <05 <05 <05 <05 <05 10/28/05 <50 <50 <05 <05 <05 <05 <05 1/26/06 <50 <50 <05 <05 <05 <05 <05 MW 7 4/30/02 530 1 300 27 3 58 72 <2 7/30/02 <50 430 21 <0 5 75 <0 5 <2 10/31/02 130 690 <05 <05 <05 <05 <2 1/30/03 96 200 12 <0 S 8 8 <2 4/30/03 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 1/26/04 300 180 19 <0 5 2 08 <2 4/27/04 72 53 08 <0 5 2 1 <2 7/30/04 59 67 <0 5 <0 5 6 09 <2 10/28/04 130 78 2 <0 5 6 3 <2 1/31/05 130 63 3 <05 4 4 <2 4/29/05 <50 <50 <05 <05 08 <05 <2 7/29/DS 62 <50 <05 <05 <05 <05 <05 10/28/05 280 240 11 2 27 20 <0 5 1/26/06 71 <50 <05 <05 <OS <05 <05 DHS MCL NE NE 1 150 700 1 750 13 Notes Non detectable concentrations are noted by the fess than symbol(<) toll w d by the detection limit Currem analytical data,s in bold DHS MCL is the Calif—a Department of Health Sermces maximum contaminant level for dnnkmg Nater NO-Not Detected above lahoratnry detection limits NE-DHS MCLS are not established MTOL-Vethyl tent butyl ether -Compound not anaylzed for 1 2 DCA Detected at 4ppb i