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locations and to discuss future activities that may be required to move the project toward closure. Ms. Duncan provided verbal approval of the newly proposed soil boring locations. Because the locations for the soil borings had been modified, it was unclear whether the work would be completed on private or public property . In order to verify the boundary between public right-of-way and private property Clearwater Project Manager Jessica Moreno and Field Manager Eric Austin met with Mr. Reid Campbell of the City of Stockton Public Works Department to review the updated soil boring locations . It was determined that the newly proposed soil borings were to be completed within the public right-of-way. In order to expedite the approval for the encroachment permit, Clearwater updated the traffic plans as needed and submitted them to Mr. Campbell ' s office in person on June 3, 2008 . Clearwater contacted Underground Services Alert on June 3, 2008 , to obtain a new drill ticket and notified both the City of Stockton Public Works Department and the SJC/EHD of the schedule for the investigation event. On June 6, 2008, Clearwater personnel supervised the installation of two continuously cored soil borings to 25 feet below ground surface for the purpose of collecting a grab groundwater sample and a soil sample from the soil groundwater interface . In order to collect discrete water samples from the sand unit located approximately 25 feet below ground surface, Clearwater supervised the installation of two additional soil borings which were drilled directly to the target depth before the sampling screen was exposed and the water sample collected. Clearwater prepared and submitted the Offsite Groundwater Investigation Report on November 12, 2008 to the San Joaquin County Public Health Services Environmental Health Division. in this report Clearwater detailed the results of soil borings SB- 11 and SB- 13 and recommended the installation of two on-site and three off-site groundwater monitoring wells as well as the preparation of a Site Conceptual Model in order to better define the extents of the TPH-g contamination on- and off-site. In their letter dated December 23 , 2008, SJC/EHD staff approved the installation of one additional groundwater monitoring well as well as the preparation of an updated SCM. 2009 On April 1 , 2009, with the approval of the SJC/EHD, Clearwater shut down the iSOC system and its maintenance program. The iSOC system was shut down for a 6-month period of time to evaluate whether a residual sorbed-phase source area was present. On April 3 , 2009, Clearwater produced the Site Conceptual Model for Barnes Trucking Facility . Clearwater identified a source zone between 22 and 25 feet below ground surface on site which is not being remediated directly by the iSOC tool system. On April 6, 2009, the SJC/EHD approved sampling all site monitoring wells (MW- 1 through MW-8), AS- 1 , and IW-3, with specified analytes for each well . As requested by SJC/EHD, groundwater samples collected from monitoring wells MW- 1 through MW4, and MW-6 through MW-7 were analyzed for BTEX, MTBE, and TPH-g. Groundwater samples collected from MW-513, MW-8, DPW- 1 , and AS- 1 were analyzed for BTEX, MTBE, TPH-g, 5 fuel oxygenates, 1 ,2-dichloroethane, and 1 ,2-dibromoethane. On December 1 , 2009, Clearwater submitted the Third Quarter 2009 Rebound Evaluation and Groundwater Monitoring Report to SJC/EHD. In this report ZB 178 — Site Investigation History 7 Updated March 2010 Barnes Trucking Facility — 1817 South Fresno Avenue, Stockton, California