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• TabTe 2 <br /> Historical Groundwater Monitonng and Analytical Data <br /> 7-Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton CA <br /> Well ID! Ethyl- MtBE Dlssol�ed <br /> Elevation date Benzene Toluene Benzene Xylene TPHg TPHd 8020 MtBE TBA DIPE EtBE TAME Notes Oxygen DTW SPT WTE <br /> TOC WIL) (P9fL) OWL) (N9►t) (Og/L) I (pgfL) [NgIE] WIL) WIL) (lig L) (P9,L) Im91L) (feet) (feet) (feet) <br /> I <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline EtBE=Ethyl-tert butyl ether TOC=Top of casing elevation m feet above mean sea level <br /> TPHd=Total petroleum hydrocarbons as-diesel 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 =Not sampled/not measured <br /> DIPE=Dusopropyl ether WTE=Water table elevation <br /> Notes <br /> Historical data pnor to 03/27/03 sample date provided by Shaw E&I <br /> Samples analyzed by EPA Method 8260B starting with 03/27103 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 /> c=Matnx Spike/Matrix Spike Duplicate Results for the analyte Benzene were affected by the anatyte concentrations already present in the un-spiked sample <br /> Page 7 of 7 <br /> 117 Eleven17-11 Stores1173341TablesA 7334 Current Groundwater AsHistoncal Water <br /> I <br />