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V <br /> PRESENTATION OF CONE PENETRATION TEST DATA <br /> ,. 1.0 INTRODUCTION <br /> This report presents the results of a Cone Penetration Testing (CPT) and in situ <br /> groundwater sampling program carried out at the Cal State University site located in <br /> Stockton, CA. The work was performed on April 14" through 17th, 2003. The scope of <br /> work was performed as directed by Condor personnel. <br /> 2.0 FIELD EQUIPMENT & PROCEDURES <br /> The Cone Penetration Tests (CPT) were carried out by GREGG IN SITU, INC. of <br /> Martinez, CA using an integrated electronic cone system. The CPT soundings were <br /> performed in accordance with ASTM standards (D 5778-95). A 20 ton capacity cone <br /> +— was used for all of the soundings (figure 1). This cone has a tip area of 15 cm2 and <br /> friction sleeve area of 225 cm2. The cone is designed with an equal end area friction <br /> sleeve and a tip end area ratio of 0.85. <br /> V <br /> The cones used during the program recorded the following parameters at 5 cm depth <br /> intervals. <br /> - Tip Resistance (qc) <br /> - Sleeve Friction (fs) <br /> - Dynamic Pore Pressure (U) <br /> The above parameters were printed simultaneously on a printer and stored on a <br /> computer diskette for future analysis and reference. <br /> The pore water pressure element was located directly behind the cone tip. The pore <br /> water pressure element was 5.0 mm thick and consisted of porous plastic. Each of the <br /> elements were saturated in silicon oil under vacuum pressure prior to penetration. Pore <br /> pressure dissipations were recorded at 5 second intervals when appropriate during <br /> pauses in the penetration. <br /> A complete set of baseline readings was taken prior to each sounding to determine <br /> rr <br /> temperature shifts and any zero load offsets. Monitoring base line readings ensures <br /> that the cone electronics are operating properly. <br /> The cones were pushed using GREGG 1N SITU's CPT rig, having a down pressure <br /> capacity of approximately 20 tons. Five CPT soundings were performed. The <br /> penetration tests were carried to depths of approximately 135 feet below ground <br /> surface. Test locations and depths were determined in the field by Condor personnel. <br /> Lr a <br /> r <br /> i.r <br />