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' 0.02; the average ground-water gradient for the shallow perched water-bearing zone is <br /> 0.01. The porosity (n) was estimated in the deep zone at 30 percent and in the shallow <br /> ' zone at 20 percent based on a published range of data (Freeze and Cherry, 1979). <br /> Hydraulic conductivity (k) values of 4.6 X 10-5 cm/sec (deep zone) and 8.1 X 10-5 <br /> cm/sec (shallow zone) were used in the analysis. These values were determined from <br /> slug tests conducted in Monitoring Wells MW-1 (deep zone) and MW-4(shallow zone). <br /> ' A discussion of the slug test analysis is contained in Appendix E. Using the above data <br /> and the equation, the ground-water flow velocity in both the deep and shallow water- <br /> bearing zones was calculated at 0.01 feet per day or 3.65 feet per year. <br /> 2.6 WATER AND LAND USE <br /> 2.6.1 Water Use <br /> In addition to the five ground-water monitoring wells installed during this investigation, <br /> ' the Department of Water Resources (DWR) supplied records which identified 2 water <br /> wells within a 1-anile radius of the study site. No monitoring, oil, gas, or geothermal <br /> ' wells exist within the 1-anile area. A snap showing the location of the water wells <br /> within 1 mile of the site is presented in Figure 3. Specific information regarding <br /> ownership,drilling method, and well construction is presented in Appendix F. <br /> ' 2.6.2 Land Use <br /> Principal land use within a 1-mile radius of the landfill is predominantly grazing and <br /> agriculture, as shown on Figure 4. The landfill comprises approximately 7 percent of <br /> the land area. <br /> STL 9390314 12 Win°FOW90--i <br />