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1 � <br /> Table 4 <br /> Groundwater Analytical Data <br /> Former Unocal Service Station 0123 <br /> 1034 Central Avenue at 11th Street <br />' Tracy,California <br /> Total Petroleum Hydrocarbons <br />' TPH as Gasoline BTEX compounds,TPH as Diesel and Total Oil and Grease <br /> TPH as Ethyl- Total TPH as Total Oil <br /> Date Gasoline Benzene Toluene benzene Xylenes Diesel and Grease <br /> Sample ID Sampled b b b b b b m <br /> U-1 6!2195 /�6� 15- 21 38 610 1800* NA <br /> U-2 6/2195 l�� 21 24 59 5 6 190' NA <br /> U-3 6W95 ND ND ND ND ND ND ND <br />' Pur eable Halogenated Hydrocarbons and Metals <br /> Date Tetrachloro- Tnchloro- Cadmium Chromium Lead Nickel Zinc <br />' <br /> Sample ID Sampled ethene b ethane b m m m m m <br /> U-3"" 612/95 67 051 ND 059 0 091 050 072 <br /> = Sequoia Analytical Laboratory reported that the hydrocarbons <br /> ' detected did not appear to be diesel and are probably gasoline <br /> = All EPA Method 8010 constituents were non-detectable <br /> except as noted above <br /> ND = Non-detectable <br /> NA = Not Analyzed <br /> ppb = parts per billion(or pg/L,micrograms per liter) <br /> ppm = parts per million(or mg/L,milligrams per liter) <br /> ! See certified ana ical reports for detection limits <br /> 1 <br /> 1 <br /> 1 <br /> 3100971A1TBLS XLS November 22, 1995 <br />