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Table 1 • <br /> First Quarter 2003 Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton,CA <br /> Well ID/ Ethyl- Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPHg MtBE TBA DIPE ETRE TAME Notes Oxygen DTW SPT WTE <br /> (TOC) ()jg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (mglL) (feet) (feet) Meet) <br /> MW-2 03/27/03 <0 50 <0 50 <0 50 <0 50 <50 072 <5 0 <0 50 <0 50 <0 50 09 1817 000 -953 <br /> 864 <br /> MW-3 03/27/03 <0 50 <0 50 <0 50 <0 50 110 <0 50 <5 0 <0 50 <0 50 <0 50 07 1734 000 -990 <br /> 744 <br /> MW-4 03/27/03 <0 50 <0 50 <0 50 <0 50 860 400 740 <0 50 <0 50 17 08 1691 000 -1022 <br /> 669 <br /> MW-5A 03/27/03 2,000 4,900 1,200 5,100 36,000 460 <200 <20 <20 <20 08 1700 000 -978 <br /> 722 <br /> MW-5B 03/27/03 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <50 <0 50 <0 50 <0 50 06 1722 000 -976 <br /> 746 <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline TAME=Tert-amyl-methyl ether pg/L=micrograms per liter <br /> MtBE=Methyl-tert-butyl ether DTW=Depth to water mg1L=milligrams per liter <br /> TBA=Tert-butanol SPT=Separate-phase hydrocarbon thickness ft=feet <br /> DIPS=Diisopropyl ether WTE=Water table elevation —=Not sampled/not measured <br /> EtBE=Ethyl-tert-butyl ether TOC=Top of casing elevation in feet above mean sea level <br /> Note All samples analyzed using EPA Method 8260B <br /> M <br /> 7-Elevenl7-11 Store1140631TableMI!7334 03-10 Page 1 of 1 <br />