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TABLE 2 <br /> Groundwater Analytical Results for Oxygenates <br /> ARCO Service Station No 2186 <br /> 3212 North California Street,Stockton,California <br /> Well <br /> Sample TBA MTBE DIPS ETBE TAME 1,2-DCA EDB Ethanol <br /> Number Date WA 991L P91L WL "9/L <br /> VW-113 911 312 0 0 1 <710 1 100 <14 <14 <14 -- -- -- <br /> (Cont) 12/11/2001 170 1 700 <2 0 24 12 - -- <br /> 3/14/2002 <5 0 63 <0 50 <0 50 <0 50 -- <br /> 6119t2002 <5 0 320 <0 50 <0 50 15 15 -- -- <br /> 9112t2002 <100 590 <10 <10 <10 33 <10 <800 <br /> 12/3/2002 <400 260 <10 <10 <10 <10 -- -- <br /> VW-2]3 3116/2001 <200 573 <2 0 <2 0 <2 0 -- — - <br /> 6/21/2001 <500* 780 <10* <10* <10* -- --9/1312001 <1 400 2 400 <29 <29 <29 -- -- -- <br /> 12/1 U2001 34 450 <2 0 <2 0 25 - -- <br /> 3/14/2002 20 320 <0 50 <0 50 25 -- - -- <br /> 6/19/2002 <100 370 <10 <10 <10 <10 -- -- <br /> 9/12/2002 25 210 <2 5 <2 5 <2 5 79 <2 5 <200 <br /> 1213/2002 <200 98 <5 0 <5 0 <5 0 <5 0 -- -- <br /> VW-313 <br /> -VW-3B 11/20/1997 <100 <2 0 <2 0 <2 0 <2 0 -- <br /> M7/1998 <br /> -211711998 NA NA NA NA NA -- -- -- <br /> 6/24/1998 <200 <2 0 <2 0 <2 0 <2 0 -- -- -- <br /> 9/21/1998 310 235 <2 0 <2 0 <2 0 - -- -- <br /> 12/14/1998 <200 432 <2 0 <2 0 5 11 -- - -- <br /> 3/31/1999 <200 <2 0 <2 0 <2 0 <2 0 -- -- <br /> 6/11/1999 <200 548 <2 0 <2 0 <2 0 <br /> 9/10/1999 <1 000 1 500 <10 <10 123 -- <br /> 12/3/1999 <200 262 <2 0 <2 0 208 - - -- <br /> 4/3/2000 <200 252 <2 0 <2 0 <2 0 -- - -- <br /> 6t22/2000 <200 3 180 <2 0 <2 0 23 -- -- -- <br /> 9/27/2000 NS NS NS NS NS -- -- -- <br /> 12/20/2000 --200 592 <2 0 <2 0 <2 0 -- -- -- <br /> 3/16/2001 <200 912 <2 0 <2 0 <2 0 - - -- <br /> 6l2l/2001 <3 800* 5 000 <77* <77* <77* - - -- <br /> 9/13/2001 <100 90 <2 0 <2 0 <2 0 - -- <br /> 12/11/2001 <20 200 <2 0 <2 0 <2 0 - -- <br /> 3/14/2002 <5 0 26 <0 50 <0 50 <0 50 -- <br /> 6/19/2002 21 1,500 <0 50 063 70 28 — — <br /> 9/1212002 <25 140 <2 5 <2 5 <2 5 29 <2 5 <200 <br /> 12012002 <200 69 <5 0 <5 0 <5 0 61 -- -- <br /> Oxygenates analyzed using USEPA Method 8260 TBA=Teri butyl alcohol <br /> R&=Analytical results in tmcrograms per liter MtBE=Methyl tart butyl ether <br /> <=Below detection bruit for analytical methods used DIPE=Di isopropyl ether <br /> NA=Not analyzed F-TBE=Ethyl tert butyl ether <br /> NS=Not sampled TAME Ten amyl methyl ether <br /> 'This sample was analyzed outside of the EPA recommended holding time EDB=1 2 Dibronicethane <br /> The reported value exceeds the calibration curve but not the Imear range <br /> Raised MRL due to high analyte concernration ret!rung samRle dilution <br /> kUSBPARCO%02186V toarterlyWQTR 02121B6GWMR4Q02 3of3 <br />