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Geotechnical Engineering Investigation Page 2 of 24 New Residential Subdivision 2706 Pock Lane Stockton, CA 95205 March 30, 2021 CTE Job # 25-1097G 2.0 PROJECT AND SITE DESCRIPTION The new residential subdivision is to consist of design and construction of a new residential subdivision, a proposed stormwater detention, and associated utilities and site improvements. The proposed project, totaling approximately 19.34 acres is to be constructed at 2706 Pock Lane in Stockton, California. At the time of our investigation, the site consisted of an undeveloped vacant lot with native vegetation. The project site area is currently bound by an existing residence located immediately to the Northwest, Pock Lane to the West, a young orchard to the South, a commercial property to the East, and an empty lot to the North. Figure 1, Site Index Map, at the end of this report, shows the general location of the sites. Figure 2, the Exploration Map, shows the configuration of the proposed project. 3.0 FIELD AND LABORATORY INVESTIGATIONS 3.1 Field Investigations The field exploration program included performing a site reconnaissance and excavating 12 exploratory borings in order to determine the geometry and geotechnical characteristics of subsurface geologic deposits at the site areas proposed for new construction. Representative samples of the subsurface soil deposits were obtained from the soil boring for use in laboratory testing to determine the engineering properties and geotechnical parameters recommended for design. The borings (designated B-1 through B-12), were excavated with a truck-mounted drill rig using four-inch outer diameter solid stem flight augers to the maximum depth drilled of approximately 30 feet below existing ground surface (bgs). The field subsurface exploration program included performing Standard Penetration Tests (SPT) using a standard split barrel sampler(1.4-inch inside diameter,2-inch outside diameter)which was operated in accordance with ASTM D-1586. The drive sampler was utilized to obtain samples of the subsurface soils at depth intervals of 2-ft, 5-ft, and every 5-ft to 30ft driving the sampler into the bottom of the borehole with successive blows of a 140-pound hammer free-falling 30 inches. The number of blows required to drive the sampler three, six-inch intervals (18-inches total of