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TABLE 2 <br /> Fuel Oxygenates Analytical Data <br /> ARCO Service Station No 2186 <br /> 3212 North California Street Stockton California r�3 <br /> Well ' <br /> Sample TBA MtBE DIPE EtBE TAME 1,2-DCA EDB Ethanol <br /> Number Date in <br /> VW-3B 11/20/1997 <100 <2 0 <2 0 <20 <2 0 <br /> 21171199B NA NA NA NA NA — <br /> 6/24/1998 <200 <2 0 <20 <2 0 <2 0 — <br /> 9/21/1998 310 235 <2 0 <20 <2 0 —12114/1998 <200 432 <2 0 <2 0 511 <br /> 313111999 <200 <20 <20 <2 0 <2 0 <br /> 6/11/1999 <200 548 <2 0 <2 0 <20 - <br /> 9/10/1999 <7,000 1,500 <10 <10 123 <br /> 12/3/1999 <200 262 <2 0 <20 208 — <br /> 4/3/2000 <200 252 <2 0 <20 <20 - <br /> 6/22/2000 <200 3,180 <2 0 <2 0 23 - - <br /> 9/27/2000 NS NS NS NS NS — - <br /> 12l20/2000 <200 592 <20 <2 0 <2 0 - <br /> 3/16/2001 <200 912 <2 0 <2 0 <2 0 -- — <br /> 6/21/2001 <3 800" 5 000 <77' <77- <77• <br /> 9/13/2001 <100 90 <2 0 <2 0 <20 <br /> 12/11/2001 <20 200 <2 0 <20 <20 — <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 /> 911212002 <br /> - <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 61 - -- <br /> • <br /> 3/11/2003 <100 370 <2 5 <2 5 <2 5 39 Y <500 <br /> 6/9/2003 <4,000 6,900 <200 <200 <200 <100 <20,000 <br /> Notes <br /> Oxygenates analyzed using USEPA Method 8260 TBA=Tert-butyl alcohol <br /> mg/L=Analytical results in micrograms per liter MtBE=Methyl Cert butyl ether <br /> <=Below detection limit for analytical methods used DIPE=Di-isopropyl ether <br /> NA=Not analyzed ETBE=Ethyl tert-butyl ether <br /> NS=Not sampled TAME-Tert-amyl methyl ether <br /> 'This sample was analyzed outside of the EPA recommended holding In EDB=12 Dibromoethane <br /> 2The reported value exceeds the calibration curve but not the linear range <br /> =Raised MRL due to high analyte concentration requiring sample dilution <br /> • <br /> 4of4 <br /> K 1Wprocessl.f5 BP ARC01021861Quarterly2 QTR 03\2186 GWMR 2003 <br />