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discontinuous lenses of clay and silt which create localized <br /> confina;rent {Calif. %;;R, 1978; Olmsted et al . , 1961 ; UcGE', <br /> 1981 , 1984 ) . <br /> 3 . 2 GROUND WATER <br /> The <br /> Yearly fluctuations of around water table elevations in <br /> : this area vary widely. Information obtained from the San <br /> Joaquin County Flood Control and ;Vater Conservation District <br /> ( 1978, 1986) indicate ground water levels vary from 70 ft <br /> j . below ground surface in the spring of 1978 ( following two dry <br /> years ) to 35 ft subsurface in the spring of 1986 j <br /> wet year ) . fan extremely <br /> A well located approximately7 000 <br /> yards sough a# the site, at = <br /> the Cerri Feed Store, was drilled to a depth of 160 ft in June <br /> F of 1973 . At that time ground water was encountered at 68 ft. <br /> ft The 6 inch well was screened from 140 feet to 160 feet and <br /> sealed to the surface (San Joaquin Local Health District, <br /> personal communication) . The direction of regional ground <br /> water flow also varies, but is generally to the east ( San <br /> r .� Joaavin Flood COnt_ol District, Spring, 1986 ) in the vicinity <br /> of the facility. s <br /> fie <br /> i <br /> 3 .3 SURFACE ;WATER t <br /> As shown in Figure 3--i f <br /> surface waters in the area of the <br /> Rainbo Baking Company facility are Duck Creek and 14alker <br /> Slough, Duck Creek runs south of <br /> the property and drains into <br /> ;Walker Slough, which is approximately 1--1/4 miles to the <br /> southwest of Rainbo' facilit ` <br /> Y• A tributary to Duck Creek runs <br /> north-south, near the western boundary o; thera ert <br /> similarly drains toward the south and Duck Creek. p Another f <br /> dr.ainageway, to the north, flows toward the northwest, <br /> draining toward this north-south tributary. Topography in the <br /> area indicates a general surface water <br /> flow direction trending ; <br /> y <br /> F <br /> y r <br /> 3-2 <br /> } <br /> ,L <br />