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1 <br /> Beacon Cardlock Station Number 610 SSB 92-1001-02 <br /> 3300 Waterloo Road Page 3 <br /> Stockton, California <br /> 2.4 Pro ect Histor <br />' A preliminary subsurface environmental investigation was conducted by Applied Geosystems in <br /> March and April of 1987 Four approximately 65 foot monitoring wells were constructed cross and <br />' down-gradient from an underground gasoline storage tank cluster Two 12 foot soil borings were <br /> drilled immediately adjacent to the tank cluster Locations of the monitoring wells, soil borings, <br />' and fuel tank cluster are presented on Plate 2 <br />' Laboratory analysts indicated the presence of minor concentrations of hydrocarbons in the soil <br /> collected from the borings and to the ground water collected from each monitoring well The <br />' results of these laboratory analyses are presented in Table 1 <br />' TABLE 1 <br /> RESULTS OF LABORATORY ANALYSES OF <br /> CONTAMINATED SOIL AND GROUND-WATER SAMPLES <br /> Beacon Cardlock Station Number 610 <br /> 3300 Waterloo Road <br /> Stockton, California <br />' Sample Number Date Sampled B T E X THCV THCE <br /> Soil Samples <br />' S-40-B1 3/10/87 ND 013 ND Oil 035 ND <br /> S-40-B2 3/11/87 ND 013 ND ND 039 ND <br /> S-40-133 3111/87 ND 013 ND 010 035 ND <br />' S-12-134 3/16/87 ND 008 ND 035 1075 42 <br /> S-12-135 3/16187 ND 010 ND 047 149 ND <br />' S-35-136 4/10/87 ND ND ND ND 040 ND <br /> Water Samples <br />' W-45-MWI 4/13/87 ND ND ND ND 00022 ND <br /> W-45-MW2 4113/87 ND 00024 ND 00007 00171 ND <br /> W-45-MW3 4/13187 ND 00007 ND 00016 00083 ND <br /> W-45-MW4 4113187 00012 00051 ND 00016 00599 ND <br /> Values listed are in milligrams per kilogram (parts per million) <br /> B = Benzene, T = Toluene, E - Ethylbenzene, X = Xylenes, ND = None Detected <br /> THCV = Total Volatile Hydrocarbons, THCE = Total Extractable Hydrocarbons <br />' SSB ENVIRONMENTAL CONSULTANTS, INC <br />