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FIELD SAMPLING PROCEDURES 1.0 SOIL BORINGS AND SAMPLING Soil borings were drilled using a cart-mounted portable drilling rig utilizing 5-inch diameter hollow-stem augers. Soil samples for lithologic description and potential laboratory analysis were collected using a pre-cleaned split spoon sampler fitted with brass liners. After the split spoon was driven to the appropriate depth, the sampler was extracted from the borehole and the brass liners removed. The number of blows required to drive the sampler 6-inches at every 18- inch drive interval was recorded on the boring logs which are included as Appendix B to this report. One brass liner from each drive interval was preserved for shipment to the laboratory by covering both ends with Teflon sheeting and tight-fitting plastic caps. A WESTON sample label was attached to the sample container and included the following information: a unique sample number, date and time of collection, sampler's initials, depth of sample, and any other pertinent information. Each sample was sealed in an individual ziplock bag and placed in an insulated cooler with ice. A Chain-of-Custody document was initiated at the time of sampling and accompanied the sample during shipment to the laboratory. Upon completion of sampling activities, all of the borings were backfilled with a 5% bentonite/cement grout mixture placed through the augers. During mixing, the bentonite was initially added to the water and allowed to hydrate. After the bentonite was hydrated, the cement was slowly added and thoroughly mixed. The borings were then backfilled to the surface by placing the grout mixture through the augers while the augers were still in the ground. 2.0 EQUIPMENT DECONTAMINATION To reduce the potential for cross contamination, augers, sampling equipment, and other associated downhole equipment was steam cleaned prior to each use. Rinsate from steam cleaning was contained onsite in 55-gallon drums. Sampling equipment was cleaned between sampling intervals using a solution of Alconox detergent and tap water, followed by a double rinse with potable water and a final spray-rinse with deionized water. 3.0 SITE SAFETY The site work was performed in accordance with WESTON's site specific health and safety plan, which was available onsite during field activities. A safety meeting was held with subcontractor personnel prior to starting work each day to review anticipated safety hazards and emergency procedures. The field work for this project was performed under Level D personal protection. M\RPTSVIYPON IX.WP 05R6i94