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Drilling will be performed by V&W Drilling of Brentwood, California, a drilling contractor licensed in the State of California to conduct such activities. All drilling will be conducted under the supervision of American Geological Services personnel in accordance with the health and safety guidelines specified in the attached Health and Safety Plan (Appendix A). The borings will be advanced using GeoProbe core sampling rig at the locations shown on Figure 2. Each hole will be advanced approximately five feet collecting a continuous core sample. The core will be collected in a clean disposable polyethylene sample liner in full five feet lengths. After retrieval of the core, and new liner will be installed in the GeoProbe tooling, and the hole will be advanced another five feet. The maximum anticipated depth of drilling is ten feet below the ground surface. In the event that ground water is encountered at less than ten feet, the boring will be terminated at ground water. No ground water samples shall be collected. During drilling the project geologist will log all samples and cuttings. All soil samples will be described in the field by the site geologist. Field observations noting sediment type, color, grain size, sorting, hardness, texture, clay content, moisture content, visible evidence of contamination, odor, or any other information important to the investigation will be recorded in the field on appropriate log forms by the site geologist. (---- All soil borings will be backfilled with a neat cement/bentonite slurry to the existing \ grade after completion. All boring locations will be plotted for inclusion on the site map. ) 3.2 Soil Sample Collection Samples will be collected from the sample liner by selecting the desired interval, and cutting out that section. Plastic ends caps will be placed over each end of the liner. After collection, each sample will be labeled with the location, date and time of collection, and placed into a cooler chilled to approximately 4° Celsius for transport to the analytical laboratory. Strict chain of custody procedures will be followed at all times. Representative soil samples will be screened by the site geologist using a headspace analysis technique. A small amount of soil will be extruded into a clean plastic zip lock- type bag. A photoionization detector (PID) will be used to analyze the headspace of the samples. Each headspace reading will be entered on the appropriate boring log. The results of the PID headspace screening will be used to select soil samples for laboratory analyses. It is anticipated that the samples collected from the depths of 5 feet will be analyzed. American Geological Services,Inc. CA99DE-095 6