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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 Tort Amyl Methyl Ether Tert-Butyl Alcohol Ethyl Alcohol Methyl Alcohol <br /> DATE (DIPE) (ETRE) (TAME) (TBA) (Ethanol) (Methanol) <br /> SAMPLED 091L) (ub ) (u5/1,) (u81L) <br /> MONITORING WELL#MW-9 <br /> 08/19/97 <20 <20 <20 <500 <0 5 <2 <br /> 11/26/97 <20 <20 <20 <500 <0 5 <2 <br /> 02118/98 <20 <20 <20 <5O0 <0 5 <2 <br /> 05/27/98 <20 <20 <20 <500 <0 5 <2 <br /> 08/26/98 <20 <20 <20 <500 <0 5 <2 <br /> [1/24198 <20 <20 <20 <500 <0 5 <2 <br /> 02/18/99 <20 <20 <20 <500 <0 5 <2 <br /> 05/20/99 QO <20 <20 <500 <0 5 <2 <br /> 08/18/99 <20 <20 QO <500 <0 5 <2 <br /> 11/10/99 <20 <20 <20 <500 <0 5 <2 <br /> 02/23/00 <0 5 <0 5 <0 5 <50 <0 05 <025 <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 <10 <20 <20 <br /> 05/17/Ot <0 5 <0 7 <0 5 <W <20 <20 <br /> 08/16/01 <0 5 <0 7 <05 <10 <20 <20 <br /> 11108/01 <0 5 <0 7 <0 5 <10 <20 <20 <br /> 02/21/02 <0 5 <0 7 <0 5 <10 <20 <20 <br /> 05/22/02 <0 5 <0 7 <0 5 <10 <20 <20 <br /> 08/14/02 <0 2 <0 12 <0 16 <10 <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 QO <20 <br /> 05/23103 <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 52 100 <20 <20 <br /> 09/30/04 <0 29 <0 17 14 63 <20 QO <br /> 11110/04 <0 29 <0 17 <0 28 12 QO <20 <br /> 02/22/05 <0 29 <0 17 <0 28 <10 <20 <20 <br /> 05/11/05 <0 29 <0 17 <0 28 <10 <20 <20 <br /> MONITORING WELL#MW-10 <br /> 08/19/97 QO <20 <20 1 300 <0 5 <2 <br /> 11/26/97 <20 <20 <20 <500 <0 5 <2 <br /> 02/18/98 QO <20 <20 <500 <0 5 <2 <br /> 05/27/98 <20 <20 <20 <500 <0 5 <2 <br /> 08/26/98 <20 <20 <20 <500 <0 5 <2 <br /> 11/24/98 <20 <20 <20 <500 <0 5 <2 <br /> 02/18/99 <20 <20 <20 <500 <0 5 <2 <br /> 05/20/99 <20 <20 <20 <500 <0 5 <2 <br /> 08/18/99 <20 <20 <20 <500 <0 5 <2 <br /> 11110/99 <20 <20 <20 600 <0 5 <2 <br /> 02/23/00 <0 5 <0 5 <0 5 <50 <0 05 <0 25 <br /> 05110/00 <0 5 <0 5 <O 5 <50 <0 05 <0 25 <br /> 08/18/00 <2 <2 <2 <50 <50 <50 <br /> I t/09/00 - - - <br /> 02/15/01 <0 5 <0 7 <0 5 <10 <20 <20 <br /> 05/17/01 <0 5 <0 7 <0 5 24 <20 <20 <br /> 08/16/01 <5 0 <7 0 <5 0 <100 QO <20 <br /> 1 1108101 <0 5 <0 7 55 788 <20 <20 <br /> 02121/02 <0 5 <0 7 <0 5 <10 <20 <20 <br /> 05/22/02 <5 0 <1 0 <5 0 <100 <20 <20 <br /> 172TAB2 OXY Page 4 of 5 6/Ei2005 <br />