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TaIO2 <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7 Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton CA <br /> Well ID! Ethyl- MtBE Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPHg TPHd 8020 MtBE TBA DIPE EtBE TAME Notes Oxygen DTW 5PT WTE <br /> TOC {N91L) (p91L) {u91L1 (t191L) (p91L) (P9►L) (N91L) (IjgfL) {N9►L) {p 1L} {Ng1L) (Fr9lL) (m91L) {feet! (feet) (feet) <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline EtBE=Ethyl-tert-butyl ether TOC=Top of casing elevation in feet above mean sea level <br /> TPHd=Total petroleum hydrocarbons-as-diesel TAME=Tert-amyl-methyl ether NglL=micrograms per liter <br /> MTBE=Methyl tert butyl ether DTW=Depth to water mg/L=milligrams per liter <br /> TBA=Tert butanol SPT=Separate-phase hydrocarbon thickness =Not sampled/not measured <br /> DIPE=Dusopropyl ether WTE=Water table elevation <br /> Notes <br /> Historical data prior to 03/27/03 sample date provided by Shaw E&I <br /> Samples analyzed using EPA Method 8260B starting with 03/27/03 sample date <br /> a=Method Blank Contamination for Ethylbenzene The associated method blank contains the target analyte at a reportable level <br /> b=Method Blank Contamination for Toluene The associated method blank contains the target analyte at a reportable level <br /> 117-Elevenl7-11 Stores1173341TableMl7334 Current Groundwater AsHistoncal Water Page 7 of 7 <br />