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ASS O C I ATE S I N C . !! y <br /> Closure Report <br /> ' Inland Paint Company <br /> 117 West Harding Way <br /> Stockton, California <br /> ' ATC Project No. 54.17295.0001 <br /> 1.0 INTRODUCTION <br /> ' ATC Associates Inc. has prepared this report on behalf of Inland Paint Company to present the <br /> information required for site closure review for the property located at 117 West Harding Way, <br /> ' Stockton, California (Figure 1). This report is being submitted to the San Joaquin County Public <br /> Health Services, Environmental Health Division (PHS/EHD) and the California Regional Water <br /> Quality Control Board, Central Valley Region(RWQCB)to satisfy the No Further Action (NFA) <br /> ' requirements, as outlined by CRWQCB (Appendix B of the Tri-Regional Recommendations). A <br /> completed checklist of data required for closure consideration is included as Appendix A. <br /> M2.0 HYDROGEOLOGIC SETTING <br /> ' The subject site is located at 117 West Harding Way in Stockton, California (Figure 1). The site <br /> is situated at an approximate elevation of 12 feet above mean sea level, in the Great Valley <br /> geomorphic province. The Great Valley province is a north-south elongated structural trough <br /> ' filled with sediment from marine and continental sources. The continentally derived sedimentary <br /> deposits comprise the upper portion of the valley fill, and were deposited in fluvial, alluvial, and <br /> lacustrine environments. <br /> tThe site is situated on level terrain. The soils at the property have been mapped by the United <br /> States Department of Agriculture (USDA), Soil Conservation Service as the Jacktone Urban Land <br /> Complex. This nearly level map unit is in the basin. The annual precipitation is about 14 inches <br /> (USDA, 1992). <br /> ' The Jacktone soil is moderately deep to hardpan and is generally poorly drained soil. This soil <br /> consists of clay, silt and some sand deposited during flood stages of major streams in the delta area <br /> including mud, muck, loam and sand. Permeability is slow in the Jacktone soil. Available water <br /> capacity is moderate. The rate of water intake in irrigated areas is 0.1 inch per hour. Where the <br /> Jacktone complex is used for development, the main limitations are high shrink-swell potential, the <br /> ' slow permeability, depth to hardpan, and low strength (USDA, 1992). <br /> The closest surface water to the site is Yosemite Lake, approximately 0.5 miles to the west. <br /> McLeod Lake and Stockton Deep Water Channel are approximately 0.8 miles to the south. <br /> w:%1729SVeporisklosure.doc 1 <br /> 1 <br />