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TABLE FOUR Summary of Chemical Arnalyol5 of GROUNDWATER 5ample5 574 West Grant Line Road, Tracy, California All re5ult5 In ug/L DATE TPH Ethyl Total Other well 1 D SAMPLED Gasoline benzene Toluene Benzene Xylenes MTBE TAME TSA Compounds MW-4 10/12/00 260 17 <05 5 0 75 140 6 0 <50 ND 1/31/01 380 37 <05 43 43 140 515 <50 NO 4/11101 680 69 <05 36 34 280 13 9 8 ND 5/23/01 290 31 <05 6 4 <05 260 14 24 ND 7/31101 210 15 <05 3 O <05 200 11 28 NO 10/30/01 810 49 <05 29 093 290 22 90 0 54" 1/29/02 630 84 <20 32 <20 510 19 <20 NO 4/30102 290 25 <2 O <2 O <2 0 540 25 <20 NO 7/31/02 420 30 <10 50 16 390 19 <10 ND 9/11/02 61 12 <05 <05 <05 62 26 61 NO 10/16/02 <50 <05 <05 <05 <05 51 13 <50 ND 10/31/02 <50 <05 <05 <05 <05 59 <050 <50 NO 12/3/02 <60 053 <05 <05 <05 50 21 58 NO 1/30103 72 20 <05 <05 <05 31 17 13 NO 4/30/03 <50 <05 <05 <05 <05 17 < 05 <05 NO 7/30103 <50 <05 <05 <05 <05 15 <05 <50 ND 10/29/03 <50 <05 <05 <05 <05 60 <05 <50 NP 1/26/04 <50 <05 <05 <05 <05 68 <05 <50 ND Mw 5 10112/00 2 600 <0 5 <05 11 16 84 <05 52 CJD 1/31101 MID <05 <05 0 62 <0 5 15 <05 7 6 ND 4/19/01 1 000 <0 5 <O 5 <05 <0 5 28 <05 26 NO 5/23/01 920 <0 5 <05 3 8 <05 66 <05 79 NO 7/31/01 240 <05 <05 <05 <05 24 <05 35 ND 10/30/01 510 <05 <05 <05 <05 33 <05 25 ND 1/29/02 <50 <05 <05 <05 <05 17 <05 61 NO 4/30/02 130 <05 <05 <05 <05 14 <05 10 ND 7/31/02 280 <05 <05 <05 <05 17 <05 13 ND • 9/11/02 160 <05 <05 <05 <05 15 <05 15 NO 10/16/02 110 <05 <05 <05 <05 16 <05 17 ND 10/31/02 97 <05 <05 <05 <05 19 <05 21 ND 12/3/02 51 <05 <05 <05 <05 15 <05 19 NO 1/30103 99 <05 <05 <05 <05 19 <05 30 ND 4/30103 91 <05 <05 <05 <05 13 <05 15 ND 7/30/03 <50 <05 <05 <05 <05 13 <05 10 NO 10/29/03 <50 <05 <05 <05 <05 11 <05 11 ND 11/26104 <60 <05 <05 <05 <05 72 <05 97 NO Mw 6 8/24/01 67 <05 <05 <05 <05 14 <05 <50 NO 1129/02 <50 <05 <05 <05 <05 077 <05 <50 NO 4/30/02 <50 <05 <05 <05 <05 <05 <05 <50 NO 7131102 <50 <05 <05 <05 <05 <05 <05 <50 ND 9/11/02 <50 <05 <05 <05 <05 <05 <05 <50 ND 10/16/02 <50 <05 <05 <05 <05 <05 <05 <50 NO 10/31/02 <50 <05 <05 <05 <05 <05 <05 <50 NO 12/3102 65 14 71 15 76 <05 <05 <50 ND 1/30/03 <50 <05 <05 <05 <05 <05 <05 <50 ND 4/30103 <50 <05 <05 <05 <05 <05 <05 <50 ND 7/30/03 <50 <05 <05 <05 055 <05 <05 <60 NO 10/29/03 <50 <05 <05 <05 <05 <05 <05 <50 NO 1/26/04 <50 <05 <05 <05 <05 <05 <05 <50 ND DHS MCL NE 1 150 700 1 750 " _ 13 NE 5` J NE VARA 6' Notes Non detectable corcentratrioro are noted by the ago than symbol(c) followed by the detection limit Current analytical data i5 in bold 0145 MCL o the Callformo Department of Health Sery;cry maximum contaminant level for drinking water NO r Not Detected above laboratory detection hm�t5 NE=PHS MCLS are not e5tabimed MT13E=Methyl tart butyl ether TAME=Tert amyl methyl ether T13A=Tert butanol =Ethyl t butyl ether(ETBE)detected