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Taft <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#44117 <br /> 2725 Country Club Boulevard <br /> Stockton CA <br /> kTd <br /> a g r 1 2- DEssolved <br /> i ^��, i, - � ,,.s t" �^ -i `s�wu � <br /> Well ID! "t-M r 2 �_ � n - Ethyl �t�' _Mtl3E, �L r 6-�W _ <br /> Ele�atton -��Dete Benzene Toluene Benzene Xy<ene TtiPNg 8020 wMtBE� -TBA DIPS -EtBE TAME DCA �ZDB,, Notes wOxygen� DTVII riSPT, WT�E <br /> TOC IL ` ' feet feet . feet <br /> MW-5 <br /> 1 53 11/05/01 <0 5 <0 5 <0 5 <0 5 <50 -- <5 <20 <5 <5 <5 <5 <5 09 973 000 -820 <br /> 1 26 01/08/02 <5 <5 <5 <5 <50 - <10 23 <5 <5 <5 -- - 08 660 000 -534 <br /> 04/12/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 -- 08 722 000 -596 <br /> 07/09/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 -- 08 740 000 -614 <br /> 10/16/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <05 <0 5 <0 5 -- - 09 900 000 -774 <br /> 03/17/03 <0 50 <0 50 97 <0 50 470 -- <0 50 <5 0 <0 50 <0 50 <0 50 -- - 1 4 724 000 -598 <br /> MW-6 <br /> 126 11/05/01 <0 5 28 <0 5 099 <50 -- <5 <20 <5 <5 <5 <5 <5 1 0 944 000 -8 18 <br /> 1 19 01/08/02 <5 <5 <5 <5 <50 -- <10 <20 <5 <5 <5 -- -- 1 0 754 000 -635 <br /> 04/12/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 - -- 1 2 726 000 -607 <br /> 07/09/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 -- 1 0 535 000 -416 <br /> 10/16/02 <0 5 <0 5 <0 5 <0 5 <50 <5 <0 5 <5 <0 5 <0 5 <0 5 -- - 1 0 9 00 000 -781 <br /> 03/17/03 <0 50 <0 50 <0 50 <0 50 <50 - <0 50 <5 0 <0 50 <0 50 <0 50 -- -- 1 4 791 000 -672 <br /> MW-7 <br /> 1 19 11/05/01 <0 5 <0 5 <0 5 <0 5 <50 - <5 <20 <5 <5 <5 <5 <5 1 0 10 20 0 QO -9 01 <br /> 153 01/08/02 -- -- -- -- - — -- -- -- -- -- -- 09 -- 000 -- <br /> 04/12/02 <0 5 <0 5 <0 5 <0 5 <50 <5 24 <5 <0 5 <0 5 <0 5 - -- 10 747 000 -594 <br /> 07/09/02 <0 5 <0 5 <0 5 <0 5 <50 <5 24 <5 <05 <0 5 <0 5 -- 1 1 790 000 -637 <br /> 10/16/02 <0 5 <0 5 <0 5 <0 5 <50 <5 052 15 <05 <0 5 <0 5 1 0 943 000 -790 <br /> 03/17/03 <0 50 <0 50 <0 50 <0 50 110 861 <501 <0 50 <0 50 <0 50 - -- 12 767 000 -6 14 <br /> Explanation <br /> TPHg=Total petroleum hydrocarbons-as-gasoline TAME=Tert-amyl methyl ether TOC=Top of casing elevation in feet above mean sea level <br /> MTBE=Methyl Cert-butyl ether 12 DCA= 1 2-dichloroethane pglL=micrograms per liter <br /> TBA=Tert-Butanol EDB =1 2-dibromoethane mglt_=milligrams per Iter <br /> DIPS=Dusopropyl ether DTW=Depth to water It=feet <br /> ELBE=Ethyl-tert-butyl ether SPT=Separate phase hydrocarbon thickness --=Not sampled/not measured <br /> WTE=Water table elevation <br /> Notes <br /> Historical data prior to 03/17103 sample date provided by Shaw E81 BTEX -TPHg and MtBE analyzed using EPA Method 8020/8015 Modified <br /> All samples analyzed using EPA Method 8260B starting with 03/17/03 sample date <br /> a=Method Blank Contamination The associated method blank contains the target analyte at a reportable level <br /> 14117 03-1 QHistoncal Water Page 3 of 3 <br />