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29 January 2001 AGE-NC Project No 00-0725 ' Page 6 of 11 3 8 WELL COMPLETION a V Borings MW1 through MW5 were completed as ground water monitoring wells MW-1 through MW-5 using two-inch diameter PVC casing with 0 020-inch slotted screen installed from approximately 5 feet to 15 feet bsg and with blank casing extended to the surface The filter pack ` (No 2112 Lonestar sand) was installed in each soil boring from 4 feet to approximately 15 feet bsg w A nominal 2-foot bentonite chip plug was then installed above the filter pack and hydrated �II i n s The wells were then grouted to near the surface with portland cement Water-tight, traffic-rated well boxes were then installed over the wells As-built well diagrams are depicted on the boring logs in Appendix B 39 LABORATORY ANALYSES OF SOIL SAMPLES t`I, Selected soil samples were analyzed for constituents listed in Section 3 3 310 MONITORING WELL DEVELOPMENT AND PURGE PROCEDURES On 04 December 2000, a Sollnst water level meter was used to measure the total depth of each {� monitoring well and the depth to ground water in each well The wells were then developed with a steel bailer, removing two gallons of silt, sand and water A two-stage disposal pump was used to purged each well of an additional eight gallons of water Temperature, pH and conductivity of purged ground water were measured at 2-gallon, 5-gallon and 10-gallon intervals, as appropriate, using a Hydac water analyzer The field data and field sheets are included in Appendix C Purged fl water was temporarily stored on-site in 55-gallon DOT-approved H-17 storage drums pending proper disposal „S I On 11 December 2000, a Sohnst water level meter was used to measure the depth to ground water in monitoring wells MW-1 through MW-5 After depth to ground water measurements, a minimum of 3 standing water-casing volumes of water was purged from each well to be sampled using a iv, disposal bailer Approximately 3 gallons of water were removed from each ground water monitoring �F wells Temperature,pH and conductivity of purged ground water were measured at 1-gallon intervals using a Hydac water analyzer The field data and field sheets are included in Appendix C Purged water was temporarily stored on-site In 55-gallon DOT-approved H-17 storage drums pending proper disposal Following purging, the depth to ground water was measured to ensure that a minimum of 80% well-volume recharge had been achieved prior to sampling I t� Advanced GeoEnvironmental Inc