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KLE/NFELOER <br /> �Bright People.Right Solutions. <br /> 4 SITE AND SUBSURFACE CONDITIONS <br /> 4.1 SURFACE CONDITIONS <br /> The project site is located south of the intersection of B Street and Earhart Avenue in Stockton, <br /> California, and within the Stockton Metropolitan Airport (SCK). North of the project site is San <br /> Joaquin County Agricultural Commissioner office building. East of the proposed improvements is <br /> the airport cargo apron and Amazon receiving facility. Currently the site is undeveloped with little <br /> vegetation ground cover. <br /> 4.2 SUBSURFACE CONDITIONS <br /> The subsurface conditions described herein are based on the conditions encountered during the <br /> geotechnical investigation at the project site. Two to three feet of undocumented fill consisting of <br /> moderately to highly plastic clay was encountered in borings B-3, B-5, B-6 and boring B-9. The <br /> fill was generally hard with pockets of stiff soil. The native materials on site generally consisted of <br /> very stiff to hard, moderately to highly plastic clay in the upper 5 below ground surface. These <br /> soils were generally underlain by stiff to hard moderately plastic clay with lenses of dense poorly <br /> to well graded sand and clayey sand to the maximum depth explored of about 31'/2 feet below <br /> present ground surface. <br /> The above is a general description of the subsurface conditions encountered at the site during <br /> our geotechnical engineering investigation. For a more detailed description of the subsurface <br /> conditions encountered in our subsurface exploration points, refer to the boring and test pit logs <br /> in Appendix A. <br /> 4.3 GROUNDWATER <br /> Groundwater was not encountered during the field investigation within any of our borings drilled <br /> to a maximum depth of approximately 31'/2 feet below the existing ground surface. Groundwater <br /> data presented on the California Department of Water Resources Water Data Library website' <br /> and our experience indicate that groundwater levels in the project area are usually greater than <br /> http://wdl.water.ca.gov/waterdatalibrary/ <br /> 20210067.001A/ST020R111447 Page 8 of 37 May 11, 2020 <br /> ©2020 Kleinfelder www.kleinfelder.com <br />