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Ta112 • <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton CA <br /> Well IDI Ethyl- MtBE Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPHg TPHd 8020 MtBE TBA DIPE EtBE TAME Notes Oxygen DTW SPT WTE <br /> TOC (p ) {pg/L) (Pg'-) (pg1L) (Pg/L) (N9'-) I (PgIL) (Ir98-) (i' IE) (N n-) (pg/-) (lig/-) (mg/L) (te) (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 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 prior to 03/27/03 sample date provided by Shaw EBI <br /> Samples analyzed using EPA Method 82606 starting with 03/27103 sample date <br /> a=Method Blank Contamination for Ethylbenzene The assouated 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 Stores1173341Tablesk17334 04 2Q xlsHistoncal Water Page 7 of 7 <br />