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T1 1 • <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7 Eleven Stare#21756 <br /> 853 East Yosemite Avenue <br /> Manteca,CA <br /> Well IDI Ethyl- MtBE 1,2- Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPH-G 8,020 MtBE TBA DIPS EtBE TAME DCA EDB Notes Oxygen DTW SPT WTE <br /> OC U191L) Gu911 I (IAA) (v9 UGIL) } I (PCA) (pg/L) (mgll_) (feet (feet) feet <br /> MW-3 <br /> 3631 01/25/00 <0 3 <0 3 <0 3 <0 6 <50 71 8 119 <20 <5 <5 <5 - <1 10 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 /> 01/15/01 <0 5 <0 5 086 17 <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 /> 06/27101 098 08 068 32 <100 - 23 <50 <2 <2 <2 -- - 09 1921 000 1710 <br /> 10/04/01 <0 5 099 <0 5 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 -- -- 2 1 1827 000 1804 <br /> 04/08/02 <0 5 <0 5 <0 5 <0 5 <50 -- <0 5 <5 <0 5 <0 5 <0 5 - -- 1 9 1920 000 1711 <br /> 07/01/02 <0 5 <0 5 <0 5 061 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 -- -- 12 21 16 000 1515 <br /> 10/01/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 - 10 2173 000 1458 <br /> 03/10/03 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <5 0 <0 50 <0 50 <0 50 -- -- 26 2021 000 1610 <br /> 04/17/03 <0 50 <0 50 <0 50 <0 50 <50 <0 50 <5 0 <0 50i <0 50 <0 50 - 30 1979 000 1652 <br /> 07/16/03 <0 50 <0 50 <0 50 <0 50 <50 -- <0 50 <5 0 <0 50 <0 501 <0 50 -- - 60 2244 000 1387 <br /> MW-4 <br /> 3413 04/08/02 <0 5 <0 5 <0 5 <0 5 <50 - <0 5 <5 <0 5 <0 5 <0 5 -- - 19 1712 000 1701 <br /> 07/01/02 <0 5 <0 5 <0 5 078 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 - - 16 1916 000 1497 <br /> 10/01/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 -- 1 1 1973 000 1440 <br /> 03/10/03 <0 50 <0 50 <0 50 <0 50 <50 -- <0 50 <5 0 <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 /> 07/16/03 <0 50 <0 50 <0 50 <0 50 <50 -- <0 50 <5 0 <0 50 <0 50 <0 50 54 2044 000 1369 <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons as gasoline 1 2 DCA=1 2 Dichloroethane ug1L=micrograms per liter <br /> MOE=Methyl tert butyl ether EDB=1,2 Dibromoethane mg/L=milligrams per liter <br /> TBA=Tart butanol DTW=Depth to water it=feet <br /> DIPE=Dusopropyl ether SPT=Separate phase hydrocarbon thickness -=Not sampled/not measured <br /> EtSE=Ethyl tert butyl ether WTE=Water table elevation <br /> TAME=Teri 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 B020/8015 Modified <br /> All samples analyzed using EPA Method 8260B 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 Stores1217561Tables121756 03 34 AsHrstorical Water Page 2 of 2 <br />