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Ta& • <br /> Groundwater Analytical Results - Oxygenate Compounds <br /> Tosco (Unocal) Service Station#6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Well ID Date Methanol Ethanol TBA MTBE DIPE ETBE TAME <br /> <--_.—_-------------------------------------------ppb---------------.__.--_____. ��._���..��_ ,,. __ _ <br /> Trip Blank <br /> TB-LB 12/08/97 <10 <500 <L00 <20 <20 <20 <20 <br /> 03/16/98 -- <500 <100 <20 <2 0 <20 <20 <br /> 05/27/98 -- -- -- -- -- -- -- <br /> 07/21/98 -- -- -- -- -- -- -- <br /> EXPLANATIONS. ANALYTICAL METHOD. <br /> TBA = Tertiary Butyl Alcohol EPA Method 8260 for Oxygenate Compounds <br /> MTBE = Methyl Tertiary Butyl Ether <br /> DIPS = Di-isopropyl Ether <br /> ETBE = Ethyl Tertiary Butyl Ether <br /> TAME = Tertiary Amyl Methyl Ether <br /> ppb = Parts per billion <br /> -- = Not Analyzed <br /> 6981 zls/#180138 3 As of 07121198 <br />