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USA Station No. 110 <br /> AGS E37031-2 <br /> Stockton, California <br /> These calculations were used to construct a Ground-Water <br /> potentiometric Surface Map across the site (Plate P•-4) . This map <br /> indicates a gradient of approximately 0.3 feet per 100 feet, or <br /> 15.5 feet per mile. The gradient implies ground-water flow <br /> toward the north northwest (1420"W) . This gradient is generally <br /> consistent with the expected flow direction based on regional <br /> topography and the distribution of dissolved contaminant <br /> concentrations in the ground water. However, considerable <br /> fluctuations in water level measurements from MW-1 and MW--2 in <br /> the time period during which measurements were made (refer to <br /> Table 2) , and uncertainties related to measurement of static <br /> water level below floating product in S-1 suggest either that the <br /> calculated gradient may have little meaning or that the gradient <br /> changes relatively rapidly in this area. <br /> GROUND-WATER SUPPLY WELL SURVEY <br /> A survey was performed of local ground water supply wells in the <br /> area of the site. Records available at the California Department <br /> of Water Resources indicate that several irrigation, domestic, <br /> and municipal (California Water Supply) wells are present within <br /> 1 mile of the site. No records from the six domestic wells <br /> 1 <br /> wr <br /> Ap,otied Ge®SXstefns <br />