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TABLE FOUR <br /> Summary of Chemical Analysis of GROUNDWATER Samples <br /> 574 West Grant Line Road, Tracy, California <br /> All results In ug/L <br /> DATE TPH Ethyl Total Other <br /> Well I D SAMPLED Gasoline Benzene Toluene Benzene Xylenes MTBE TAME TBA :ompound <br /> MW-5 10/12/2000 2,600 <05 < 05 11 16 84 <05 52 NO <br /> 1/31/2001 350 <0 5 <05 062 <0 5 15 <05 76 NO <br /> 4/11/2001 1,000 <0 5 <05 <05 <0 5 28 <0 5 26 NO <br /> 5/23/2001 920 <0 5 <0 5 38 <0 5 66 <0 5 79 NO <br /> 7/31/2001 240 <05 < 05 <05 <05 24 <05 35 NO <br /> 10/30/2001 510 <05 < 05 <05 <05 33 <05 25 NO <br /> 1/29/2002 < 50 <05 < 05 <05 <05 17 <05 61 NO <br /> 4/30/2002 130 < 05 <05 <05 < 05 14 <05 10 NO <br /> 7/31/2002 280 <05 <05 <05 < 05 17 <05 13 NO <br /> 9/11/2002 160 <05 <05 <05 < 05 15 <05 15 NO <br /> 10/16/2002 110 <05 < 05 <05 < 05 16 <05 17 NO <br /> 10/31/2002 97 <05 < 05 <05 < 05 19 <05 21 NO <br /> 1213/2002 51 <05 <05 <05 < 05 15 <05 19 NO <br /> 1/30/2003 99 <05 < 05 <05 < 05 19 <05 30 NO ° 3 <br /> 4/30/2003 91 <05 <05 <05 <05 13 <05 15 NO., - <br /> 7/30/2003 < 50 <05 < 05 <05 <05 13 <05 10 NP <br /> 10/29/2003 < 50 <05 < 05 <05 <05 11 <05 11 NO ' <br /> 1/26/2004 < 50 <05 < 05 <05 <05 72 <05 97 ND <br /> 4/27/2004 74 <05 < 05 <05 <05 14 <05 31 NO <br /> 7/30/2004 < 50 <05 < 05 <05 <05 49 <05 68 NO <br /> 10/28/2004 < 50 <05 < 05 <05 <05 52 <05 <50 NO <br /> 1/31/2005 87 <05 < 05 <05 < 10 89 <05 21 NO <br /> 4/29/2005 120 <05 <05 <05 < 10 10 <05 25 ND <br /> MW-6 8/24/2001 67 <05 <05 <05 <05 14 <05 <50 NO <br /> 1/29/2002 < 50 <05 <05 <05 <05 077 <05 <50 NO a <br /> 4/30/2002 < 50 < 05 <05 <05 <05 <05 <05 <50 NO <br /> 7/31/2002 < 50 <05 <05 <05 <05 <05 <05 <50 NO <br /> 9/11/2002 < 50 <05 < 05 <05 <05 <05 <05 <50 NO <br /> 10/16/2002 < 50 <05 < 05 <05 <05 <05 <05 <50 NO <br /> 10/3112002 < 50 <05 < 05 <05 < 05 <05 <05 <50 NO <br /> 12/3/2002 65 14 71 15 76 < 05 <05 <50 NO <br /> 1/30/2003 < 50 <05 <05 <05 < 05 < 05 <05 <50 NO <br /> 4/30/2003 <50 <05 <05 <05 <05 <05 <05 <50 NO <br /> 7/30/2003 <50 <05 < 05 <05 055 <05 <05 <50 NO <br /> 10/29/2003 <50 <05 < 05 <05 <05 < 05 <05 <50 NO <br /> 1/26/2004 <50 <05 < 05 <05 <05 < 05 <05 <50 NO <br /> 4/27/2004 < 50 <05 < 05 050 075 <05 <05 <50 NO <br /> 7/30/2004 <50 <05 < 05 <05 <05 < 05 <05 <50 NO <br /> 10/28/2004 <50 <05 < 05 <05 <05 < 05 <05 <50 NO <br /> 1/31/2005 < 50 <05 < 05 <05 < 10 <05 <05 <50 NO <br /> 4129/2005 NOT SAMPLED THIS QUARTER <br /> Notes <br /> Non-detectable concentrations are noted by the less than symbol(<) followed by the detection limit <br /> Current analytical data is in bold <br /> DHS MCL is the California Department of Health Services maximum contaminant level for drinking water <br /> NO=Not Detected above laboratory detection limits <br /> NE=DHS MCLS are not established <br /> MTBE=Methyl tert-butyl ether TAME=Tert-amyl methyl ether <br /> TBA=Tart Butanol '=Ethyl-t-butyl ether(ETBE)detected <br />