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f LW ti. 3.0 DESTRUCTION OF GROUNDWATER MONITORING WELLS The objective of this scope of work was to remove the three groundwater monitoring wells and any waste generated or stored at the site, so that the regulatory agencies could close the case and issue a "No Further Action Required" letter. To achieve this objective, Ramage Environmental supervised the destruction of the monitoring wells and coordinated the proper disposal of waste well materials, soil and water from the site. 3.1 Planning and Permitting On October 23, 2008, San ,Joaquin County EHD issued permits (SR#55754 and #55755) to destroy the three monitoring wells. Two permits were required because the wells were located on two separate property parcels. One well (MW-1) was located on the subject site, and the other two wells (MW-2 and MW-3) were located in the city of Tracy Hamilton Alley right-of-way. Copies of the approved well destruction permits are included in Appendix A. t. On October 23, 2008, the city of Tracy issued encroachment permit#08-1780 to destroy the two wells in the Hamilton Alley right-of-way. As a condition of the permit, Ramage Environmental distributed a posting of the proposed work to all businesses along the Hamilton Alley access. A copy of the encroachment permit is included in Appendix A. La At least two working days prior to field work, Ramage Environmental notified EHD and Underground Service Alert so that regulatory and underground utility inspections could be scheduled (USA Ticket#568313). As a condition of the encroachment permit, and to secure a safe work area within the city right-of-way, Ramage Environmental contracted with Direct Traffic Control to be on-site during all work within Hamilton Alley. 3.2 Monitoring Well bestruction and Site Restoration LO On November 7, 2008, under Ramage Environmental supervision and EHD inspection, All Well Abandonment (AWA), a state of California licensed drilling contractor (C-57 License#848359) destroyed the three wells. Prior to destroying the wells, AWA measured the depths to groundwater and total depths of the wells. The total depths of the wells ranged from 20.0 to 20.5 feet, and the depth-to-groundwater ranged from 9.30 to 10.20 feet bgs. All three monitoring wells were originally constructed as 2-inch diameter wells in 8-inch diameter boreholes. The wells were installed to depths of 20 feet, and included 15 feet of polyvinyl chloride (pvc) well screens, spanning from 5 to 20 feet bgs, and blank pvc casings from ground surface to 5 feet bgs. The monitoring well logs are included in Appendix E. La 9 ry