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In September 2006, SECOR, along with Entact Environmental Services, commenced pipeline abandonment and removal activities at 525 West Weber Avenue in the Waterfront Towers Parking facility in accordance with Stantec's Pipeline Removal, Abandonment, Soil Excavation, On-Site Horizontal SVE Well Installation, and Horizontal SVE Well Installation Beneath Delta View Apartments Report and Work Plan for Pipeline Removal, Abandonment, and Soil Excavation in Waterfront Towers Parking Lot dated February 10, 2005. A report entitled Pipeline Removal, Abandonment, Soil Excavation, and Parking Lot Reconstruction summarizing remedial activities and parking lot restoration at the Waterfront Towers Parking facility was submitted on June 25, 2008. On May 31, 2007, optimization of the DPE/SVE system, in accordance with SECOR's Work Plan for Additional DPE Feasibility Testing and Expanded Remedial System Installation, Dated January 4, 2006, was completed and permitted to operate by the City of Stockton. A soil vapor extraction system start-up and dual phase augmentation report was submitted on June 25, 2008. On June 21, 2007, well MW-6 on the MOU was destroyed and abandoned on behalf of the RDA and under the supervision of Golden State Environmental due to planned excavation and construction activities. From July 28 through September 26, 2008, additional assessment activities were conducted at the Site. Five B-zone groundwater monitoring wells (MW-56 through MW-60), seven C-zone groundwater monitoring wells (MW-61 through MW-67), and seven D—zone groundwater monitoring wells (MW-68 through MW-74)were installed. Results were summarized in Stantec's Additional Deep Groundwater Zone Assessment Report dated January 26, 2009. In November 2008, Treadwell and Rollo (T&R) on behalf of the RDA abandoned monitoring wells MW-8, MW-10, MW-11, MW-39, MW-40, MW-41, and MW-53 due to excavation activities on the UOU. These wells have yet to be reinstalled at the site.