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Tat • <br /> Second Quarter 2003 Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#20632 <br /> 4627 Da Vinci Drive <br /> Stockton CA <br /> Well IDI Elevation Date Berizen afue T �r , 1Mt$E <br /> (TOC) — t (Pg - 1#rg <br /> MW-1 05/20/03 <0 50 <0 50 <0 50 <0 50 <50 1 5 <5 0 <0 50 <0 50 <0 50 05 603 000 <br /> 1 73 <br /> MW-2 05/20/03 <5 0 <5 0 <5 0 <50 <500 2,600 200 <5 0 <5 0 <5 0 03 740 000 -458 <br /> 282 <br /> MW-3 05/20/03 <0 50 <0 50 12 73 520 46 <5 0 <0 50 <0 50 <0 50 d 04 729 000 -447 <br /> 282 <br /> MW-4R 05/20/03 52 <10 28 47 1,400 1,800 170,000 <10 <10 <10 07 682 000 -445 <br /> 237 <br /> MW-5 05120/03 <0 50 <0 50 <0 50 <0 50 51 60 16 <0 50 <0 50 <0 50 02 705 000 -448 <br /> 257 <br /> MW-6 05/20/03 <0 50 <0 50 <0 50 <0 50 <50 14 <5 0 <0 50 <0 50 <0 50 d 06 677 000 -439 <br /> 238 <br /> MW-7 05/20/03 <200 <200 <200 <200 <20,000 54,000 44,000 <200 <200 <200 04 733 000 -460 <br /> 2 73 <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline TAME=Tert-amyl-methyl ether pglL=micrograms per liter <br /> MtBE=Methyl-tert-butyl ether DTW=Depth to water mglL=milligrams per liter <br /> TBA=Tert-butanol SPT=Separate-phase hydrocarbon thickness ft=feet <br /> DIPE=Dusopropyl ether WTE=Water table elevation --=Not sampled/not measured <br /> ELBE=Ethyl-tent-butyl ether TOC=Top of casing elevation in feet above mean sea level NIA=Not Applicable <br /> N otes <br /> All samples analyzed using EPA Method 8260B <br /> Id=Matrix Spike/Matrix Spike Duplicate Results for MtBE were affected by the analyte concentration already present in the un-spiked sample <br /> 7-Elevenl7-11 Storekl4063kTables\20632 03-2Q As Page 1 of 1 <br />