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EGG Cone Penetration Testing Procedure (CPT) Gregg In Situ, Inc carnes out all Cone Penetration Tests (CPT) using an integrated electronic cone system, Figure CPT The soundings were conducted r using a 20 ton capacity cone with a tip area of 95 cm2 and a friction sleeve area of 225 cm2_ The cone is designed with an equal end area friction sleeve and a tip end area ratio of 0 85. The cone takes measurements of cone bearing (q.), sleeve friction (fs) Geophones � and dynamic pore water pressure (VA VP) (u2) at 5-cm intervals during penetration to provide a nearly Push rod continuous hydrogeologic log CPT connector data reduction and interpretation is Soil seal performed in real time facilitating on- ' site decision making The above Electric cable for mentioned parameters are stored on signal transmission disk for further analysis and reference All CPT soundings are Water Seal performed in accordance with Friction load cell revised (2002) ASTM standards (D Frictin sleeve ` 5776-95) Inclinometer The cone also contains a porous filter element located directly behind Tip load cell the cone tip (u2), Figure CPT. It consists of porous plastic and is 5 0mm thick The filter element is Water Seal used to obtain dynamic pore pressure as the cone is advanced as Sod sea! well as Pore Pressure Dissipation Pore Pressure re Tests (PPD Ps) during appropriate Tip load cell (u2) pauses in penetration It should be Filter noted that prior to penetration, the element is fully saturated with silicon Cone Tip (Qc) oil under vacuum pressure to ensure accurate and fast dissipation. Figure CPT p When the soundings are complete, the test holes are grouted using a Gregg In I Situ support rig The grouting procedure consists of pushing a hollow CPT rod . with a "knock out' plug to the termination depth of the test hole. Grout is then pumped under pressure as the tremae pipe is pulled from the hole. Disruption or y further contamination to the site is therefore minimized