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� � -� max, � ' �'�,,y .�7 �'�• � ., �.� � .� � � �. � b-x 2.0 EQUIPMENT AND METHODOLOGY The cone penetration test (CPT) consists of pushing a cylindrical cone tipped probe into a soil deposit. The probe is attached to the end of a string of steel pipe segments, each 1 rn (3.3 ft) long, and pushed into the ground by means of heavy hydraulic rams mcaunted 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 projectwere performed in accordance with ASTM Standard D 3441-86(1996), t£ng using mechanical and electric friction cone when applicable. This standard covers tes probes. A variety of additional probes can be deployed with the CPT truck which are not presently 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 piezometric cone,and the BAT EnviroProbe(R) were used. The following sections descrite the equipment and field procedures used during this investigation. 2.1 ELECTRIC FRICTION COME The electric friction cone (Figure 2) is a tool enabling characterization of the.,Site w stratigraphy, hydrogeology, and geotechnical parameters. The fo!lowing subsections describe the in situ measurements, probe geometry, data acquisition, and cuality control procedures associated with the electric friction cone. Data interpretation methodology is described in Section 3.0. 2.1.1 Measurements The fallowing measurements are made with the electric friction cone: (1) Soil bearing resistance on the cone tip, (2) Soil frictional resistance along the cylindrical Niciinn sleeve, (3) Probe inclination, and (4) Pore water pressure (optional). 2 a.