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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 DIPE EtBE 'FAME 1,2-DCA EDB Ethanol <br /> Number Date ELL AWL Ag/L WL Ag/L <br /> VW 1B 3/16/2001 <200 210 <20 <20 <20 6/2112001 <100 94 <2 0 <20 <2 0 <br /> 9/13f2001 <7I0 1,100 <14 <14 <14 <br /> 12/11/2001 170 1 700 <2 0 24 12 - — <br /> 3/14/2002 <5 0 63 <0 50 <0 50 <0 50 - <br /> 6119/2002 <5 0 320 <0 50 <0 50 15 16 -- -- <br /> 9/12/2002 <100 590 <10 <10 <10 33 <10 <800 <br /> 12/3/2002 <400 260 <10 <10 QO <10 -- -- <br /> 3/11/2003 <2,000 2,400 <50 <50 <50 <50 -- <10,000 <br /> VW-2B 3/16/2001 <200 573 <2 0 <2 0 <2 0 -- — - <br /> 6/21/2001 X500* 780 <10* <10* <10* — <br /> 9/13/2001 <1 400 2 400 <29 <29 <29 — <br /> 12111/2001 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 /> 12/3/2002 <200 98 <5 0 <5 0 <5 0 <5 0 -- — <br /> 3/11/2003 <400 530 <10 <10 <10 <10 <2,000 <br /> VW 313 1 1120/1 997 <100 <2 0 <2 0 <20 <2 0 — -- <br /> 2117/1998 NA NA NA NA NA <br /> 6/2411998 <200 <2 0 <2 0 <2 0 <2 0 <br /> 9/21/1998 310 235 <2 0 <2 0 <2 0 <br /> 1 2/1 411 998 <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 <20 208 <br /> 4/3/2000 <2.00 252 <2 0 <20 <2 0 — <br /> 6/22/2000 <200 3 180 <2 0 <20 23 — <br /> 912712000 NS NS NS NS NS <br /> 12!20/2000 <200 592 <2 0 <20 <2 0 — — — <br /> 3/16/2001 Q00 912 <2 0 <2 0 <2 0 6/2112001 <3,800* 5,000 <77* 177* 47* — <br /> 9/I3/2001 <100 90 <2 0 <2 0 <2 0 — — <br /> 12/11/2001 <20 200 <2 0 <2 0 <2 0 — <br /> 3/1412002 <5 0 26 <0 50 <0 50 <0 50 — — <br /> 6/19/2002 21 1,500 <0 50 063 70 28 - <br /> 911212002 <25 140 <2 5 <2 5 <2 5 29 <2 5 <200 <br /> 12/3/2002 <200 69 <5 0 <5 0 <5 0 6 1 - — <br /> 312 1/2003 <100 370 <2 5 <2.5 <2 5 39 -- <500 <br /> Oxygenates analyzed using USEPA Method 8260 TBA=Tert butyl alcohol <br /> AgIL=Aualytical results in micrograms per fuer MIRE=Mcthyl ten butyl ether <br /> <=Below detection limn for analytical nxthods used DIPS�Dl isopropyl ether <br /> NA=Not analyzed ETBE=Ethyl test butyl ether <br /> NS=Not sampled TAME Tert amyl methyl ether <br /> 'This sample was analyzed outside of the EPA recommended holdmg mne EDB=1,2 Albmmocthane <br /> r The reported value exceeds the calibration curve but not the bnear range <br /> Raised MRL due to high analyte concentration mquirmg sample dilution <br /> k U5 BP ARCO102I WQuartcrlyll QTR 0312186 GWMR 1 Q03 3 of 3 <br />