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T22 <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 ;Xylc�e, TPHg TPHd 8020 MtBE TBA DOPE,, EtBE FAME dotes Oxygerip DT hI SPT �E <br /> OC { } {fryrt} {p l<} {Ns�1 {peril {pg1L) {pglL} Ngn.} Nynf f {pg1L} pg {mglL {feet}, .; eat) <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons as-gasoline ELBE=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 pglL=micrograms per liter <br /> MtBE=Methyl-tert-butyl ether DTW=Depth to water mg/L=milligrams per hter <br /> TBA=Tert-butanol SPT=Separate-phase hydrocarbon thickness —=Not sampledinot measured <br /> DIPE=Diisopropyl 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 by EPA Method 8260B starting with 03127/03 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 /> c=Matrix Sprke/Matnx Spike Duplicate Results for the analyte Benzene were affected by the analyte concentrations already present in the un-spiked sample <br /> d=Matrix Spike/Matnx Spike Duplicate Results for the analyte TBA were affected by the analyte concentrations already present in the un spiked sample <br /> I <br /> 117 Elevenl7 11 Stores1173341Tables117334 Current Groundwater xlsHistoncal Water Page 7 of 7 <br />