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✓ i �� lurl � . ' <br /> TABLE 1 <br /> UNDERGROUND STORAGE TANKS <br /> Hess-DuBois Cleaners <br /> 348 West Harding Way, Stockton, California <br /> Tank Identification Volume (Gallons) Product <br /> Tank #1 2000 Stoddard Solvent <br /> Tank #2 1800 Stoddard Solvent <br /> Tank #3 2000 Stoddard Solvent <br /> Tank #4 500 Stoddard Solvent <br /> Tank #5 1370 Stoddard Solvent <br /> Tank #6 5000 Stoddard Solvent <br /> Tank #7 500 Stoddard Solvent <br /> Tank #S 500 Stoddard Solvent <br /> A. <br /> . 2.3 Site Assessment <br /> Three groundwate-r monitoring wells (MW-1, MW-2 and MSG'-3) were installed at the sire <br /> on October 26, 1993. The monitoring well locations are illustrated in Figure-2. <br /> No TP:I-1 or BTE&X weI'e detected iaz samples from MW-1 or MW-2. However, TPl-i Was <br /> detected in the soil boring completed as MW-3 at concentrations up to 2,000 ppm. Toluene, <br /> ethlybenzene and xylene were also detected in soil samples from MW-3 at concentrations <br /> up to 51 ppm. <br /> Groundwater samples were collected from each well in November 1993, June 1994 and <br /> September 1994. TPH as Stoddard Solvent, ethylbenzene and xylenes have beeii detected <br /> in all three monitoring wells during each sampling event; Benzene has been detected only <br /> in samples from MW-1 and MW-2. <br /> 2.4 Groundwater Depth and Flow Direction <br /> Since installation of the three monitoring wells, depth to groundwater has averaged 42.43 <br /> feet. Since January 1994, the groundwater flow direction has remained between N 5° E and <br /> N43 ° W. <br /> 0r04,,I Audit 4 <br /> Sr WPU12.94 <br />