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<br />Geotechnieal Engineering Exploration <br />Hallarwin Construction Company <br />Project No. 21975089 <br />SITE EXPLORATION <br />The scope of the services performed far this project inGuded a site reconnaissance by a <br />geotechnical engineer, a subsurface exploration program, laboratory testing and <br />engineering analysis. <br />Field Exploration <br />A total of nineteen (' 19) test borings were drilled on September 26, 29 and October 2, <br />1997, to approximate depths of twenty (20) to forty (40) feet below the surtace at the <br />locations shown on the Site Plan (see Figure 1 in Appendix A). The borings were <br />advanced with struck-mounted drilling rig, utilizing 3-1/4" inside diameter hollow stem <br />augers and/or 4-inch diameter continuous power flight augers. <br />The borings were located in the field by measurements from existing site features at the <br />direction of Mr. Jeff Gregg of Hall-Irvvin Construction Company. <br />Continuous lithologic logs of each boring were recorded by the geotechnical engineer <br />during the drilling operations. At selected intervals, samples of the subsurface materials <br />were taken by driving asplit-spoon sampling device. <br />Penetration resistance measurements were obtained by driving the split-spoon sampling <br />device into the subsurtace materials with a 140-pound hammer falling 30 inches. The <br />penetration resistance value is a useful index to the consistency, relative density or <br />hardness of the materials encountered. <br />Groundwater measurements were made in each boring at the time of the initial site <br />exploration. <br />Laboratory Testing <br />All samples retrieved during the field exploration were returned to the laboretory for <br />observation by the project geotechnical engineer, and were Gassified in accordance with <br />the Unified Soil Classification System described in Appendix C. Samples of bedrock were <br />Gassified in accordance with the general notes for Bedrock Classification. At that time, the <br />field descriptions were confirried or modified as necessary and an applicable laboratory <br />testing program was formulated to determine engineering properties of the subsurface <br />materials. Boring logs were prepared and are presented in Appendix A. <br />2 <br />