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TABLE 2 <br /> ADDITIONAL GROUNDWATER DATA <br /> THRIFTY OIL STATION#172, STOCKTON,CA <br /> OXYGENATES ALCOHOLS <br /> Di-isopropyl Ether Ethyl-Tert-Butyl Ether Ter(-Amyl Methyl Ether Tert-Buty)Alcohol Ethyl Aicahol Methyl Alcohol <br /> DATE (RIPE) (ETBE) (TAME) (TBA) (Ethanal) (Methanol) <br /> SAMPLED (ug/L) (uVL) (ug/L) (u ) (mg ) (m13�) <br /> I l/10/99 <20 <20 <20 2,100 <0 5 7 9 <br /> 02/23/00 <25 <25 <25 <2 500 <2 5 <12 5 <br /> 05/10/00 <0 5 <0 5 <0 5 <50 <0 05 <0 25 <br /> 08/18/00 <2 <2 <2 <50 <50 <50 <br /> 11/09/00 - _ _ _ <br /> 02/15/01 <0 5 <0 7 <0 5 33 <20 <20 <br /> 05/17/01 _ _ _ - _ - <br /> 05/24/0l <0 5 <0 7 <0 5 8181 <20 <20 <br /> 08/16/01 <25 <35 <25 <500 <20 <20 <br /> H/08/01 <5 0 <7 0 <5 0 1 210 <20 <20 <br /> 02/21/02 <50 <70 <50 <1 000 <20 <20 <br /> 05/22/02 <125 <175 <125 <2 500 <20 <20 <br /> 08/14/02 <20 <12 <16 <1 000 <20 <20 <br /> 11/20/02 <0 2 <0 12 <0 16 <10 <20 <20 <br /> 02/12/03 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 05/21/03 <14 5 <8 5 <14 365 J <20 <20 <br /> 08/20/03 <14 5 <8 5 13 100 13 400 <20 <20 <br /> 11/26/03 <2 9 <1 7 <2 8 <100 <20 <20 <br /> 02/05/04 <29 <17 <28 <1 000 <20 <20 <br /> 05/05/04 <145 <8 5 323 5 250 <20 <20 <br /> 08/11/04 <29 <17 <28 <1 000 <20 <20 <br /> dElft 09/30/04 <29 <17 <28 <1 000 <20 <20 <br /> 11/10/04 <72 5 <42 5 <70 <2 500 <20 <20 <br /> 02/22/05 <7 25 <4 25 71 <250 <20 <20 <br /> 05/11/05 <14 5 <8 5 <14 <500 <20 <20 <br /> 08/24/05 <14 5 <8 5 <14 <500 <20 <20 <br /> 11/09105 <14 5 <8 5 <14 <500 <20 <20 <br /> [VOTE DIPE ETBE TAME TBA Ethanol Methanol analyzed by EPA Methods 8260 82608 <br /> Beginning 8118100 Ethanol and Methanol analyzed by D285 GC-FID <br /> 172TAB2 OXY Page 6 of 6 12/62005 <br />