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Ew y-� i 4.0 CPT DATA AND BAT GROUNDWATER CHEMISTRY DATA Ta":.,F!.) i summarizes the field testing and sampling activities. The following sections discuss the results. 4.1 CPT DATA The digital cone penetration test (CPT) data was stored at discrete depth intervals of 3 cm (0.1 ft) on a personLV computer in the CPT rig. The data was displayed on a monitor while the tests were proceeding, and hard copy dot matrix logs were printed upon completion of each test. The data logs have been reprinted with a laser printer, and are contained in Appendix A of this report. The following data logs were generated; - o Graphical plots of the measured pore pressure,cone tip resistance, and computed pore pressure ratio as a function of depth. o Graphical plots of the computed friction ratio, measured cone tip resistance, and interpreted soil stratigraphy as a function of depth. o Tabular printouts of the measured cone tip resistance,computed overburden-normalized cone tip resistance, computed friction ratio, measured pore pressure (if applicable), and interpreted soil stratigraphy as a function of depth. o Graphical plots of the measured pore pressure dissipation data as a function of time. 4.1.1 Stratigraphy Interpretations of CPT data were performed to provide a profile of soil behavior type versus depth at each location. In addition to providing general stratigraphic information these interpretations were used to locate the BAT EnviroProbe in the most permeable - saturated zone to enchance sampling rates. While local variations exist, the CPT data indicated a general stratigraphic profile, to depths of approximately 30 feet below ground level, consisting primarily of silts and clays with a saturated sand layer, ranging in thickness from 2 feet to greater than 8 feet, encountered at a depth ranging from 22 feet to 27 feet below ground level. A sand 12 i '�