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' Beacon Cardlock Station Number 610 SSB 92-1001-02 <br /> 3300 Waterloo Road Page 7 <br /> Stockton, California <br /> TABLE 4 <br /> RESULTS OF LABORATORY ANALYSES OF GROUND-WATER SAMPLES <br /> Beacon Cardlock Station Number 610 <br /> 3300 Waterloo Road <br /> Stockton, California <br /> Location Date B T E X TPHg <br />' W-67 30-MWS 4/01/93 <0 50 060 <0 50 073 <50 <br /> W-67 37-MW6 4/01/93 <0 50 <0 50 <0 50 <0 50 <50 <br /> W-67 56-MW7 4/01/93 <0 50 <0 50 <0 50 <0 50 <50 <br /> W-67 95-MWS 4116/93 <0 50 <0 50 <0 50 <0 50 <50 <br />' Results in micrograms per liter (ug/1) or parts per billion (ppb) <br /> B = Benzene, T = Toluene, X = Xylenes, E = Ethylbenzene <br /> TPHg = Total Petroleum Hydrocarbons as Gasoline, < = Less than the laboratory method detection limit <br /> W-67 30-MW5 <br /> Location <br /> Depth i <br /> Depth In Feet <br /> Water Sample <br /> M <br /> 3.6 Ground-Water Gradient <br /> The elevation of the ground-water surface at each monitoring well was determined by subtracting <br /> the depth to ground water from the elevation of each well head Graphical methods were used to <br /> evaluate the ground-water gradient and flow dtrectlon The ground-water gradient and flow <br /> direction as of April 1, 1993, was 0 011 towards the west. A site plan presented as Plate 3 shows <br /> the monitoring well locations,ground-water elevations, the ground-water gradient, and the direction <br /> of ground-water flow Depth to ground-water data for the site is presented in Table 5 <br />' SSB ENVIRONMENTAL CONSULTANTS, INC <br />