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� s � .�fid' - •- ". "� ,1,'� �`- � r �W . R s k1 2.0 EQUIPMENT AND METHODOLOGY The cone penetration test (CPT) consis'8 of ushing a cylindrical cal cono Pipped probe into a soil deposit. The probe is attached to the end of a string of steel pipe segments, each 1 M (3.3 ft) long, and pushed into the ground by means of heavy hydraullc rams mounted inside the rear compartment of a 3-axle truck (Figure 1). The weight of the truck (20 tons) provides the reaction force. The CPTs on this protect were performed in accordance With ASTM Standard D 3441-86(1986), - when applicable. This standard covers tasting using mechanical and elenic friction cone probes. A variety of additional probes can be deployed with the CPT truck which are not _. presenty covered under any ASTM standard,including several types of instrumented probes for in situ measurement of various soil properties, as well as sampling probes for _ collection of soil, groundwater and soil vapor. On this project, the electric friction piexometr,'c cone, and the EAT EnviroProbe(R)were used. The following sections describe the equipment and field procedures used during this investigation. 2.1 ELECTRIC FRICTION CONE The electric friction cone (Figure 2) is a tool enabling characterization of the site _ stratigraphy, hydrogeology, and geotechnical parameters. The following subsections describe the in situ measurements, probe geometry, data acquisition, and quality control procedures associated with the electric friction cone. Data interpretation methodology is described in Section 3.0. 2.11.1 Measurements iThe following measurements are made with the electric friction cone: r (1) Soil bearing resistance on the cone tip, (2) Soil frictional resistance alone the cylindrical friction sleeve, (3) Probe inclination, and (4) Pore water pressure (optional). � t �Y 2