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?E:g C 39 Kwikx, 1/15/95 3.4''el! Su*weying and Sampling The elevation of the top of the PVC casing in aII three wells was surveyed on December 28, 1994. A notch was cut into the casing for future reference. After surveying, the depth to groundwater was measured in each well using a SoIinst water level meter, and then each well was purged of 10 gallons of standing water prior to sample collection (Appendix A). A two-stage submersible pump was used for this purpose. The pump was washed in a TSP solution between wells. During purging, the temperature, pH, and conductivity of the water were measured at 2-gallon intervals with a Corning Checkmate meter until these parameters stabilized Samples were collected with a disposable plastic bailer and placed in 40-m1 vials. After labelling and logging, the samples were transmitted to McCampbell Analytical for analysis. 4. subsu7face stratigy appy A downward-coarsening sequence of clay, silt, and sand is present beneath the site. From the surface to a depth of approximately 13 feet, medium to dark-brown organic clay is present in Kl"-1. A strong sewer odor was noted in the 10-foot soil sample, and fragments of decomposed plant material were observed. At a depth of 15 feet, the clay is gray-brown to yellow and contains particles of silt and fine-grained sand. At a depth of 20 feet, very dark-brown organic clay is in sharp contact with greenish gray-brown clayey silt. Drill cuttings between 20 and 30 feet suggested further increase in grain size, and brownish-gray silty very-fine-grained sand was recovered between 28 and 30 feet. A slightly different sequence was encountered in KF-2. Medium-brown clay is present only to a depth of approximately 8 feet. From 8 to 12 feet, light brownish-gray silty to slightly clayey fine-grained sand is present. From 12 to 21 feet, blue-gray silty clay is present. At 21 feet, this clay is in contact with poorly sorted, silty to medium-grained sand,which is present to the bottom of the boring at 30 feet. 4.2 Depth to Gtroundw2ter Damp soil was encountered in both borings throughout most of the sampled interval. The brownish-gray silty clay at 15 feet in KF-2 was somewhat drier, however. Saturated soil was drilled at approximately 18 feet in both wells. When the three wells were monitored on December 28, the depth to groundwater was approximately 19 feet. Measurements are tabulated n Table 1.