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13 <br /> Table 4 <br /> Groundwater Analytical Results(EPA Method 8010) <br /> Former Unocal Service Station#0123 <br /> 1034 Central Avenue <br /> Tracy,California <br /> EXPLANATIONS. <br /> Laboratory analytical results prior to March 24, 1998,were compiled from reports prepared by MPDS Services,Inc <br /> Cis-1,2-DCE = Cis-1,2-Dichtoroethene , <br /> s <br /> Trans-1,2-DCE = Trans-l,2-Dichloroethene <br /> ppb=Parts per billion <br /> ND=Not Detected <br /> , <br /> i <br /> 1 Chloroform was detected at a concentration of 0 77 ppb <br /> 2 1,1,1-Tnchloroethane was detected at a concentration of 0 86 ppb <br /> s <br /> 1,1-Dichloroethane(1,1-DCA)was detected at a concentration of 064 ppb <br /> 4 Methylene chloride was detected at a concentration of 10 ppb <br /> 5 Methylene chloride was detected at a concentration of 15 ppb <br /> 6 1,1-DCA was detected at a concentration of 0 80 ppb <br /> 1,1-DCA was detected at a concentration of 0 82 ppb <br /> s 1,1-DCA was detected at a concentration of 0 52 ppb <br /> 9 Chloroform was detected at a concentration of 0 52 ppb <br /> 10 I,1-DCA was detected at a concentration of 0 57 ppb <br /> 11 Methylene chloride was detected at a concentration of 5 6 ppb <br /> 12 Methylene chloride was detected at a concentration of 6 7 ppb <br /> 13 Methylene chloride was detected at a concentration of 8 3 ppb <br /> 14 Methylene chloride was detected at a concentration of 6 1 ppb <br /> 15 Methylene chloride was detected at a concentration of 7 7 ppb <br /> 16 Methylene chloride was detected at a concentration of 7 9 ppb <br /> r <br /> Note All EPA Method 8010 constituents were ND,except as repoited above <br /> k <br /> ANALYTICAL METHOD <br /> i <br /> I <br /> EPA Method 8010 for Halogenated Volatile Organic Compounds(HVOGs) <br /> i <br /> Ik <br /> i <br /> I <br /> i <br /> n <br /> i <br /> 0123 x17 b A&/19/00 <br />