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Ta*2 <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 DissF) , <br /> Elevation Date Benzene Toluene Benzene Xylene TPHg TPHd 8020 MtBE TBA DIPE ELBELAME Notes OxyDTW SPT WTE <br /> TOC ( �) {Pg0-} WWI-} tl� ) iso IL) (1191L) (p IE) (IjgfL) [F� ) �l (m (fast) (feet) (feet) <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline EtBE=Ethyl tert butyl ether TOC=Top of casing elevation in feel above mean sea level <br /> TPHd=Total petroleum hydrocarbons-as-diesel TAME=Tertamyl methyl ether pg1L=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 —=Not sampled/not measured <br /> DIPE=Dusopropyl ether WTE=Water table elevation <br /> Notes <br /> Historical data prior to 03/27103 sample date provided by Shaw E&I <br /> Samples analyzed by EPA Method 82608 starting with 03/27/03 sample date <br /> a=Method Blank Contamination for Ethylbenzene The assocGated 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 Spike/Matnx Spike Duplicate Results for the analyte Benzene were affected by the analyte concentrations already present in the un spiked sample <br /> Id=Matnx SprkelMatnx Spike Duplicate Results for the analyte TBA were affected by the analyte concentrations already present in the un-spiked sample <br /> 147 Elevenl7 11 StoreMl73341Tables117334 Current Groundwater AsHistoncal Water Page 7 of 7 <br />