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Table 2 • <br /> First Quarter 2003 Groundwater Monitoring and Analytical Data <br /> 7 Eleven Store#21756 <br /> 853 East Yosemite Avenue <br /> Manteca,CA <br /> Well ID/ Ethyl- MtBE 1,2• Dlssolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPH-G 8,020 MtBE TBA DIPS EtBE TAME DCA EDB Notes Oxygen DTW SPT WTE <br /> OC L L L L) !w ft L L m 4 (feet) feet feet <br /> MW 3 <br /> 36 31 01/25/00 <0 3 <0 3 <0 3 <0 6 <50 71 8 119 <20 <5 <5 <5 -- <1 1 0 1702 000 1929 <br /> 04/07/00 <0 5 <0 5 <0 5 <1 <100 - 35 <50 <2 <2 <2 23 1595 000 2036 <br /> 07/20/00 <0 5 <05 <05 <1 <100 - 73 <50 <2 <2 <2 - 07 1865 000 17 6fi <br /> 10/13/00 <0 5 <05 <05 1 7 <100 - 11 <50 <2 <2 <2 - 0 7 1949 000 1682 <br /> 01/15/01 <0 5 <0 5 086 1 7 <100 - 21 <50 <2 <2 <2 -- a 1 6 1770 000 1861 <br /> 04/04/01 <0 5 <05 <05 <1 <100 - 36 <50 <2 <2 <2 - 08 1801 000 18 30 <br /> 06/27/01 098 08 068 32 <100 - 23 <50 <2 <2 <2 09 1921 000 1710 <br /> 10/04/01 <0 5 099 <0 5 1 7 <50 - <5 <20 <5 <5 <5 - 24 21 50 000 14 81 <br /> 01/07/02 <05 1 056 29 <50 -- <5 <20 <5 <5 <5 - 21 1827 0 00 1804 <br /> 04/08/02 <0 5 <0 5 <05 <0 5 <50 - <05 <5 <0 5 <05 <0 5 - 1 9 1920 000 1711 <br /> 07/01/02 <0 5 <05 <05 061 <50 <5 <05 <5 <0 5 <05 <0 5 - 1 2 21 16 000 1515 <br /> 10/01/02 <0 5 <0 5 <0 5 <05 <50 <5 <0 5 <5 <0 5 <05 <0 5 1 0 21 73 000 14 58 <br /> 03/10/03 <0 50 <0 50 <0 50 <050 <50 -- <0 50 <50 <0 50 <050 <0 50 - - 26 2021 000 1610 <br /> MW-4 <br /> 3413 04/08/02 <0 5 <05 <0 5 <05 <50 <0 5 <5 <05 <0 5 <05 - - 1 9 1712 000 1701 <br /> 07/01/02 <0 5 <0 5 <0 5 078 <50 <5 <0 5 <5 <05 <0 5 <05 - - 1 6 1916 000 1497 <br /> 10/01/02 <0 5 <05 <0 5 <0 5 <50 <5 <0 5 <5 <05 <0 5 <05 - 1 1 1973 000 1440 <br /> 03/10/03 <0 50 <050 <0 50 <0 50 <50 -- <050 <5 0 <0 50 <0 50 <0 50 - - 76 1804 000 1609 <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons as gasoline 1,2 DCA=1,2 Dtchloroethane ugfL=micrograms per liter <br /> MTBE=Methyl Pert butyl ether EDB=1 2 Dibromoethane mg/L=milligrams per liter <br /> TBA=Tert butanol DTW=Depth to water ft=feet <br /> DIPE=Diisoprophyl ether SPT=Separate phase hydrocarbon thickness �Not sampled/not measured <br /> EtBE=Ethyl tert butyl ether WTE=Water table elevation <br /> TAME=Tert amyl methyl ether TOC=Top of casing elevation in feet above mean sea level <br /> Notes <br /> Historical data prior to 03/10/03 sample date provided by Shaw E&I BTEX TPHg and MtBE analyzed using EPA Method 802018015 Modified <br /> All samples analyzed using EPA Method 8260B starting with 03/10/03 sample date <br /> a=Method Blank Contamination The associated method blank contains the target analyte at a reportable level <br /> 21756 03 1QHistorical Water Page 2 of 2 <br />