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TIP 4 <br /> Groundwater Analytical Results {EPA Method 8010} <br /> Former Unocal Service Station#0123 _ <br /> 1034 Central Avenue <br /> Tracy, California <br /> Well ID Date cis-1,2-DCE trans-1,2-DCE Tetrachloroethene Trichloroethene <br /> <------------------------------------------------- b—---------------------------------—.�.�_.�--- <br /> U4 03/03/97 ND ND ND ND <br /> 06/04/97 072 ND 4 1 ND <br /> 09/03/97 ND ND 47 ND <br /> 12/02/97 ND ND 31 ND <br /> 03/24/98 27 37 48 14 <br /> EXPLANATIONS_ <br /> Groundwater laboratory analytical results prior to March 24, 1998, were compiled from reports prepared by MPDS Services, Inc <br /> cis-1,2-DCE = cts-1,2-Dichloroethene <br /> trans-1,2-DCE = trans-l,2-Dichloroethene <br /> ppb = Parts per billion <br /> ND = Not Detected <br /> I Chloroform was detected at a concentration of 0 77 ppb in well U-1 <br /> 2 1,1,1-Trichloroethane was detected at a concentration of 0 86 ppb in well U-2 <br /> i <br /> Note All EPA Method 8010 constituents were ND,except as reported above <br /> 0123 xls/#280047 2 As of 03/24198 <br />