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Gregg In Situ, Inc. SECOR <br /> January 14, 1998 SFIRB, Stockton, CA <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 soil & <br /> groundwater sampling program carried out at the SFFB site located in Stockton, CA. <br /> The work was performed on 29th & 30th December, 1998. The scope of work was <br /> performed as directed by Mr. Charles Melancon of SECOR. <br /> 2.0 FIELD EQUILPMENT & 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 (D3441). A 20 ton capacity cone was <br /> used for all of the soundings. This cone has a tip area of 15 sq,cm. and friction sleeve <br /> area of 225 sq.cm. The cone is designed with an equal end area friction sleeve and a <br /> tip end area ratio of 0.85. <br /> The cones used during the program recorded the following parameters at 5 cm depth <br /> intervals- <br /> - Tip Resistance Qt) <br /> - Sleeve Friction (Fs) <br /> Dynamic Pore Pressure (U0 <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 glycerin 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 /> 3 <br />