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1, ) <br /> TabtA C <br /> First Quarter 2005 Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#20632 <br /> 4627 Da Vinci Drive <br /> Stockton,CA <br /> Well ID/, Ethyl= _ Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene ,.TPHg MtBE TBA DIPS "fRE, ; TAME Notes; Oxygen DTw SPT WTE <br /> (TOC) .. {N91L) (NglL) (ugIL) = Iua/L}. (N9IL). (H91L} (I'9!L) {Ngll-? (N9lL},' �pg1L) (mglL], (feet) feet) (feet) <br /> MWA 02/18/05 <0.50 <0.50 <0.50 <0.50 <50 <0.50 <5.0 <0.50 <0.50 <0.50 6.1 3.40 0.00 -1.67 <br /> 1.73 <br /> MW-2 02/18/05 <0.90 <0.90 <0.90 <0.90 <90 680 <5.0 <0.90 <0.90 <0.90 0.3 5.97 0.00 -3.15 <br /> 2.82 <br /> MW-3 02/18/05 <0.50 0.61 63 96 2,300 1.3 <5.0 <0.50 <0.50 <0.50 0.3 5.94 0.00 -3.12 <br /> 2.82 <br /> MW4R 02/18/05 690 110 830 3,200 17,000 4,200 28,000 <0.50 <0.50 7.4 0.3 5.48 0.00 -3.11 <br /> 2.37 <br /> MW-5 02/18/05 <0.50 <0.50 <0.50 <0.50 <50 36 29 <0.50 <0.50 <0.50 0.4 5.67 0.00 -3.10 <br /> 2.57 <br /> MW-6 02/18/05 <0.50 <0.50 <0.50 <0.50 <50 1.1 <5.0 <0.50 <0.50 <0.50 1.4 5.41 0.00 -3.03 <br /> 2.38 <br /> MW-7 02/18/05 <25 <25 <25 <25 <2,!=.100 <br /> 44,000 <25 <25 <25 0.3 5.87 0.00 -3.14 <br /> 2.73 <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 mglL=milligrams per liter <br /> TBA=Tert-butanol SPT=Separate-phase hydrocarbon thickness <br /> DIPE=Diisopropyl ether WTE=Water table elevation <br /> ELBE=Ethyi-tert-butyl ether TOC=Top of casing elevation in feet above mean sea level <br /> Notes <br /> Samples analyzed by EPA Method 82608 <br /> d=Matrix Spike/Matrix Spike Duplicate Results for MtBE were affected by the analyte concentration already present in the un-spiked sample. <br /> e=Analysis for TPHg was affected by short-term instrument contamination problem.Normally,the sample would be re-analyzed,but the problem was not identified until after the hold time <br /> time had expired. It is likely that the actual concentration of TPHg is<50 pg/L. <br /> 7-Elevenl7-11 Store1206321Tables120632 Current Groundwaler.xls Page 1 of 1 <br />