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' 24 June 2005 AGE-NC Project No 98-0534 ' Page 2 of 6 Soil was continually sampled from the boring with a 4-inch split-spoon core sampler ahead of the ' drill bit The sampling equipment was washed in an Alconox solution and rinsed with water prior to each sampling run to minimize cross-contamination 2 12 Soil Logging Soil was extruded from the core barrel with a clean tool The soil was then visually described in accordance with the Unified Soil Classification System (see boring log in Appendix A) 5 213 Well Completions ��j ► (�4 ' Pilot boring MW-9 was completed as a ground water monitoring wellu ng 2-1 diameter PVC casing with a 0 020-inch slotted screen installed from approximately 6 to 65 eet bsg The filter ' pack (No 3 Lonestar sand) was installed from 57 to 65 feet bsg, and a nominal 2-foot bentonite pellet plug was then installed above the filter pack and hydrated The well was then grouted to near the surface with portland cement,and a water-tight,traffic-rated well box was installed over the well �. An as-built well diagram is depicted on the boring log in Appendix A ' 2 14 Monitoring Well Development On 17 February 2005, monitoring well MW-9 was developed by AGE Ground water was purged ' from the monitoring well using a steel bailer until ground water was visually sediment free, approximately 84 gallons of water were removed from the well with a Wattera tubing bailer ' Temperature, pH and conductivity of purged ground water were measured at 20 gallon intervals using an Oakton water analyzer Copies of the field data sheets are in Appendix B Purged water was ' temporarily stored on-site in Department of Transportation (DOT)-approved 55-gallon drums pending proper disposal 2 15 Equipment Decontamination ' All augers were cleaned prior to advancement in each boring location The sampling equipment was washed in an Alconox solution and triple rinsed with water prior to each sampling run to avoid cross-contamination Advanced GeoEnwronmental,Inc