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August 8, 1988 AGS Job No. 38053-1 <br /> Former Texaco Service Station, Manteca, California <br /> deposition of lacustrine clay over extensive areas. Higher <br /> energy environments, such as rivers and streams, resulted in the <br /> deposition of channel sand and gravel. <br /> The site is underlain by very gently dipping Quaternary fluvial <br /> sediments consisting of sand, silt, and clay. The topographic <br /> surface in the area is slightly irregular, with a generally <br /> northwestward slope. The nearest surface stream is Lone Tree <br /> Creek approximately 4 miles north of the site. Spreckles Sugar <br /> wastewater ponds are located approximately 0.5 mile south of the <br /> site. <br /> Based on the water level within the excavation, previous <br /> experience in the area, and conversations with personnel of the <br /> California Regional Water Quality Control Board, Central Valley <br /> Region, ground water is expected to be approximately 20 feet <br /> below grade. The direction of ground-water flow is expected to <br /> ~' be variable, ranging from west-northwest to northeast. <br /> PROXIMITY TO WELLS AND UTILITIES <br /> ie <br /> There are two municipal water-supply wells located within 2,000 <br /> ---.. _ <br /> of the site: one approximately 1, one----- <br /> feet --- — ---- <br /> 650 to the soot ---an .._... <br /> i, <br /> approximately 2,000 feet to the northeast. The locations of the <br /> 6 <br /> APPsled.IGO®SySAMS <br />