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• Tal��i • <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#21756 <br /> 853 East Yosemite Avenue <br /> Manteca CA <br /> Well IDI Ethyl- MtBE 1,2- Dlssolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPH-G 8,{}20 MtBE TBA DIPS EtBE TAME DCA EDB Notes Oxygen DTW SPT WTE <br /> TOC (p IL) p !L} (p IL) (pglL) (p IL) !L) (p IL (p IL} !L (p !L) (p IL) (p 1L) 1L rrl L (feet) feet (feet) <br /> W3 <br /> 3631 01/25/00 <0 3 <0 3 <0 3 <06 <50 71 8 119 <20 <5 <5 <5 — <1 1 0 1702 000 1929 <br /> 04/07/00 <0 5 <0 5 <0 5 <1 <100 35 <50 <2 <2 <2 — 23 1595 000 2036 <br /> 07/20/00 <0 5 <0 5 <0 5 <1 <100 -- 73 <50 <2 <2 <2 -- 07 1865 000 1766 <br /> 10/13/00 <0 5 <0 5 <0 5 17 <100 <1 <50 <2 <2 <2 -- 07 1949 000 1682 <br /> 01115101 <05 <05 086 1 7 <100 — 21 <50 <2 <2 <2 -- a 16 1770 000 1861 <br /> 04/04/01 <0 5 <0 5 <0 5 <1 <100 -- 36 <50 <2 <2 <2 — 08 1801 000 1830 <br /> 06/27/01 098 08 068 32 <100 — 23 <50 <2 <2 <2 — 09 1921 000 1710 <br /> 10/04/01 <05 099 <05 17 <50 <5 <20 <5 <5 <5 — — 24 21 50 000 1481 <br /> 01/07/02 <0 5 1 056 29 <50 <5 <20 <5 <5 <5 -- 21 1827 000 1804 <br /> 04/08/02 <0 5 <0 5 <05 <05 <50 — <05 <5 <0 5 <0 5 <05 — 19 1920 000 1711 <br /> 07/01/02 <05 <05 <0 5 061 <50 <5 <0 5 <5 <05 <0 5 <05 — 1 2 2116 000 1515 <br /> 10/01/02 <05 <0 5 <0 5 <05 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 — 1 0 21 73 000 1458 <br /> 03110/03 <0 50 <0 50 <0 50 <0 50 <50 — <0 50 <50 <0 50 <0 50 <0 50 26 2021 000 1610 <br /> 04/17/03 <0 50 <0 50 <050 <0 50 <50 <0 50 <50 <0 50 <0 50 <0 50 -- — 30 1979 000 1652 <br /> MW4 <br /> 3413 04/08/02 <05 <05 <0 5 <05 <50 -- <05 <5 <0 5 <0 5 <05 — -- 1 9 1712 000 1701 <br /> 07/01/02 <0 5 <0 5 <0 5 078 <50 <5 <05 <5 <0 5 <0 5 <0 5 -- — 1 6 1916 000 1497 <br /> 10/01/02 <05 <0 5 <0 5 <05 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 — — 11 1973 000 1440 <br /> 03/10/03 <0 50 <0 50 <0 50 <0 50 <50 -- <0 50 <50 <0 50 <0 50 <0 50 — - 76 1804 000 1609 <br /> 04/17/03 <0 50 <0 50 <0 50 <0 50 <50 -- <0 50 <5 0 <0 50 <0 50 <0 50 — -- 28 1774 000 1639 <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons as-gasoline 1 2-DCA=1 2 Dichloroethane pg1L=micrograms per liter <br /> MtBE=Methyl4ert butyl ether EDS=1 2 Dibromoethane mg1L=milligrams per liter <br /> TBA=Tert-butanol DTW=Depth to water ft=feet <br /> DIPE=Dusopropyl ether SPT=Separate-phase hydrocarbon thickness --=Not sampled/not measured <br /> EtBE=Ethyl tert-butyl ether WTE=Water table elevation <br /> TAME=Tert-amyl-methyl ether TOC=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 /> 117 Elevenl7-11 Storesti217561Tables121756 03-20 xlsHistoncal Water Page 2 of 2 <br />