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Table 2 <br /> Groundwater Analytical Results - Oxygenate Compounds <br /> Tosca (Circle K) Unit #8671 <br /> 8606 Thornton Road <br /> Stockton, California <br /> Well 111 Date Ethanol TBA MTBE ? DIPE ETRE TAMC <br /> (Ppb) (Ppb) (ppb) (Ppb) (ppb) (ppb) <br /> MW4 02/ 15/99 -- ND 3 .06 ND ND ND <br /> 05/14/99 ND ND 22 ND ND ND <br /> MW-2 02/ 15/99 -- ND ND ND ND ND <br /> 05/14/99 ND ND ND ND ND ND <br /> MW-3 02/15/99 -- ND ND ND ND ND <br /> 05/14/99 ND ND 3.8 ND ND ND <br /> MW4 02/15/99 -- ND 74. 8 ND ND ND <br /> 05/14/99 ND ND 3.7 ND ND ND <br /> F.XPLA_ NATIONS : <br /> Groundwater analytical data prior to May 14 , 1999, were compiled from reports prepared by Secor International, Inc. <br /> TBA = Tertiary Butyl Alcohol <br /> MTBE = Methyl Tertiary Butyl Ether <br /> DIPE = Di-isopropyl Ether <br /> ETRE = Ethyl Tertiary Butyl Ether <br /> TAME = Tertiary Amyl Methyl Ether <br /> ppb = Parts per billion <br /> ND = Not Detected <br /> -- = Not Analyzed <br /> ANALYTICAL METHOD: <br /> EPA Method 8260 for Oxygenate Compounds <br /> 8671 .xls/# 180198 1 As of 05/14/99 <br />