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2,0 SCOPE OF WORK The objectives of this investigation were to assess the lateral extent of impacted groundwater and to establish a groundwater monitoring capability at the site To achieve these objectives, three on-site groundwater table monitoring wells were permitted, installed, surveyed, monitored and sampled Due to the unavailability of water well completion reports for San Joaquin County at the California Department of Water Resources (DWR), the proposed water well survey has not yet been completed The water well survey will be completed and documented in a subsequent quarterly groundwater monitoring report 21 Project Planning Prior to initiating fieldwork, a site-specific health and safety plan addendum was prepared according to 29 CFR 1910 120 The health and safety plan included safety procedures, chemical hazard information, site safety officers, and preferred medical emergency locations 0 PHSIEHD issued permit SR#0023467 to complete the on-site monitoring wells On July 20, 200 A copy of the approved permit is included in Appendix A At least two working days prior to drilling, PHSIEHD and Underground Service Alert (USA)were notified so that regulatory and utility clearance inspections could be scheduled Underground utilities were marked by USA member utilities under USA Ticket#243994 22 Groundwater Monitoring Well Installations On August 31 and September 1, 2000, Ramage Environmental supervised V&W Drilling, Inc (C- 57 License#720904) install three on-site groundwater table monitoring wells to establish a groundwater monitoring capability at the site The locations of the three wells, designated MW-1, ' MW-2, and MW-3, are shown on Figure 2 2 2 1 Monitorrn_q Well Construction Development and Surve V&W Drilling installed all three wells in 8-inch diameter soil borings dulled to a depth of 87 feet bgs using a truck-mounted drill rig, equipped with hollow stem augers All three wells consisted of 20 feet of two-inch diameter, Schedule 40, flush-threaded and machine-slotted (0 020-inch) polyvinyl chloride (PVC) well screen, spanning from approximately 67 to 87 feet bgs Blank PVC casings were threaded into the tops of the well screens and extended to the surface 9