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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 Tert-Amyl Methyl Ether Tert-Butyl Alcohol Ethyl Alcohol Methyl Alcohol <br /> DATE (DIPE) (ETBE) (TAME) (TBA) (Ethanol) (Methanol) <br /> SAMPLED 081-) (u£/11) ("gVQ (ug/L) (-9/L,) (-g/L) <br /> 08/14/02 <0 2 <0 12 <0 16 <10 <20 <20 <br /> 11/20/02 <0 2 <0 12 <0 16 24 <20 <20 <br /> 02/12/03 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 05/21/03 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 08/20/03 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 11/26/03 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 02/05/04 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 05/05/04 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 08/11/04 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 11/10/04 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 02/22/05 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 0511 1105 <0 29 <0 17 <0 28 <10 <20 <20 <br /> MONITORING WELL#MW II <br /> 08/19/97 <20 <20 <20 <500 <0 5 <l0 <br /> 11/26/97 <20 <20 <20 <500 <0 5 <2 <br /> 02/18/98 <20 <20 <20 1 100 <0 5 13 <br /> 05/27/98 <20 <20 <20 510 <0 5 <2 <br /> 08/26/98 <20 <20 <20 970 <0 5 15 <br /> 11/24/98 <20 <20 2 300 2 700 <0 5 <2 <br /> 02118/99 <20 <20 <20 3 000 <0 5 <2 <br /> 05/20/99 <20 <20 <20 920 <0 5 <2 <br /> 08/18/99 <20 <20 <20 980 <0 5 5 8 <br /> 1 i110l99 <20 <20 <20 2 100 <0 5 79 <br /> 02/23/00 <25 <25 <25 <2 500 <2 5 <12 5 <br /> 05/10/00 <0 <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 /> 05/24/01 <0 5 <0 7 <0 5 818 J <20 <20 <br /> 08/16/01 <25 <35 <25 <500 <20 <20 <br /> 11/08/01 <5 0 <7 0 <5 0 1 210 <20 <20 <br /> 02/21/02 <50 <70 <50 <I 000 <20 <20 <br /> 05/22/02 <125 <175 <125 <2 500 <20 QO <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 Qp <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 /> 11/26103 <2 9 <1 7 <2 8 <100 <20 <20 <br /> 02/05/04 <29 <17 <28 <1 000 <20 <20 <br /> 05/05/04 <14 5 <8 5 323 5 250 <20 <20 <br /> 08/11/04 <29 <17 X28 <1 000 <20 <20 <br /> 09/30/04 <29 <17 <28 <] 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 <145 <8 5 <14 <500 <20 <20 <br /> NOTE DIPE ETBE TAME TSA Ethanol Methanol analyzed by EPA Methods 8260 82608 <br /> 0 Beginning 8118/00 Ethanol and Methanol analyzed by D285 GC-FID <br /> 172TA82 OXY Page 5 of 5 6/612005 <br />