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•w- <br /> percolation into outcrops in the foothills of the <br /> b <br /> primarily Y rainfall and irrigation <br /> Sierra Nevada. Local percolation of <br /> At depths below about 1,000 <br /> water may mace a small contribution- saline water is encoun-- <br /> feet, in the pre-Pliocene formations,separated by lenses of clays <br /> tered. Fresh and saline waters <br /> �67�e <br /> and agglomerates (CDWR 1955, <br /> ly horizontal in fall <br /> The water table beneath the <br /> 0.002, <br /> elevation <br /> on a water table <br /> 1985, with a slope much le 1956, the water <br /> • WCD 1985) • in spring <br /> elevation map {S�TC.FC & radient of about <br /> table sloped down to the southwest with a g the depth u the <br /> As noted earlier, <br /> 0.0006 (SJCFC & WCD 1986) • was approximately 50 feet in <br /> water table in the site vicinity of the site itself indicated a <br /> 1985 and 1986. An investigationSlope of 0.004, down to <br /> depth to the water table of 40 feet nearly and s older of magnitude <br /> P Although yea Y <br /> the north [CTI 1986) • ue j ust noted, this gradient is rea- <br /> the regional val <br /> larger than• hl heterogeneous nature of local 1 sonable, considering the hig Y flow appears to re <br /> The local direction of ground-water <br /> aquifers. tonal and site <br /> uncertain, based an the divergence of the <br /> conditions <br /> specific data. Figure 9 illustrates by <br /> beneath the Site. <br /> hydraulic parameters for this <br /> Representative measured values et by were not found in <br /> area, such as conductivitylogsanlogsawere, found for all wells <br /> the literature. However, <br /> s of <br /> or of <br /> and <br /> shown <br /> in Figure 1 . These indicate that len hick and areofound s at <br /> and gravel are commonly from 6 to 20 feet <br /> The driller` s report for <br /> various depths between 50 and 200 feet• indicates sand layers <br /> the well nearest the site {3206 E• Fremont) <br /> 109, and 130 feet . The thickest <br /> the-to-top are 25, 69, the <br /> whose depths-to-top Based on representative data, <br /> extends .from 130 to 180 feet permeable <br /> of these highly, <br /> average hydraulic conductivity (�) -3 m/s (Freeze and Cherry <br /> sand-and-gravel lenses may be about 10 porosity <br /> 1979) . tinder a gradient (i) of 0 .004 and with a nominal P <br /> 9 <br />