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i <br /> i <br /> TV • <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#17647 <br /> 1048 West Yosemite Avenue <br /> Manteca CA <br /> Well IDI Ethyl- MEBE 1,2- Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPHg 8020 MtBE TBA DIPE EtBE TAME DCA EDB Notes Oxygen DTW SPT WTE <br /> TOC (Vg1L) (V91L) (VglL) (Vg/L) (Vg1L) (Vg1L) (V91L) (NgIL) (Vg1L) (Vg1L) (Vg1L) (Vg1L) (Vg1L) (mg1L) (feet) (feet) (feet) <br /> MW-I' <br /> 30 36 01/25/00 0 94 <0 3 <0 3 <0 6 81 00 85 2 108 ill <5 <5 <5 _ -- 1 0 1317 000 17 19 <br /> 04/07/00 <0 5 <0 5 <0 5 <1 <100 26 <50 <2 <2 <2 -- -- 05 1228 000 1808 <br /> 07/20/00 <05 <0 5 <0 5 <1 <100 - 54 <50 <2 <2 <2 -- -- 1368 000 1668 <br /> 10/13/00 <05 <0 5 <0 5 <1 <100 -- 31 <50 <2 <2 <2 -- -- 04 1443 000 1593 <br /> 01/15/01 <0 5 <05 064 <1 5 <100 -- 68 <50 <2 <2 <2 -- -- a 1 3 1324 000 1712 <br /> 04/04/01 <05 <0 5 <0 5 <1 <100 -- 23 <50 <2 <2 <2 -- - 1 1 1286 000 1750 <br /> 06/27/01 074 <0 5 <0 5 <1 <100 -- 36 <50 <2 <2 <2 -- 09 1560 000 1476 <br /> 10/05/09 <0 5 <0 5 <0 5 064 <50 -- <5 <20 <5 <5 <5 <5 <5 1 2 1663 000 1373 <br /> 01/07/02 083 062 <0 5 12 <50 -- <5 <20 <5 <5 <5 -- 1 4 1400 000 1636 <br /> 04/08/02 <0 5 <0 5 <0 5 <0 5 <50 -- 96 <5 <0 5 <05 <05 056 <0 5 1 3 1368 000 1668 <br /> 07/01/02 <05 <06 <0 5 <0 5 <50 <5 19 <5 <05 <0 5 <0 5 <0 5 <05 11 16 i 1 000 1425 <br /> 03110103 <0 50 <0 50 <0 50 <050 <50 -- 1 2 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 6 9 1476000 1560 <br /> 04/17/03 <0 50 <0 50 <0 50 <0 50 <50 056 <50 <050 <0 50 <0 50 <0 50 <050 07 1506 000 1530 <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline 1 2-DCA=12 Dichloroethane pg/L=micrograms per liter <br /> MtBE=Methyl-tert butyl ether EDB=1 2-Dibromoethane mglL=milligrams per liter <br /> TBA=Tert-butanol DTW=Depth to water ft=feet <br /> DIPE=Dasopropyl ether SPT=Separate-phase hydrocarbon thickness --=Not sampled/not measured <br /> ELBE=Ethyl-tert-butyl ether WTE=Water table elevation <br /> TAME=Tert-amyl-methyl ether FOC=Top of casing elevation in feet above mean sea level <br /> Notes <br /> Historical data prior to 03/10/03 sample date provided by Shaw E&I BTEX,TPHg and MtBE analyzed using EPA Method 8020/8015 Modified <br /> All samples analyzed using EPA Method 82608 starting with 03/10/03 sample date <br /> a=Method Blank Contamination The associated method blank contains the target analyte at a reportable level <br /> I <br /> 117-Elevenl7-11 Stores1176471Tables117647 03-20 xlsHistorical Water Page 2 of 2 <br />