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Vacuum applied to these wells has been gradually increased. Since October 2009, the vacuum of the wells has been set to -0.3 in. wc. The concentration of methane from the wells remains below 2%. Continuing to collect low-methane gas from these wells reduces the methane content of the LFG reaching the flare station, inhibiting the ability of the flare to maintain proper temperature. On February 22, 2011, a meeting in a meeting at RWQCB offices Caltrans staff indicated willingness to participate with the closure of the landfill. On July 7, 2011,the County and Caltrans both received a Section 13267 Order to extend the closure cap over uncapped refuse. The order also required the County to evaluate the extent of the groundwater release and to design corrective actions with the installation of three permanent groundwater monitoring wells. On August 30, 2011,the County and Caltrans signed a Memorandum of Understanding agreeing to allow the County access to Caltrans property to install groundwater monitoring wells required in the Order, and that the closure cap would be installed over both properties in a single project. On October 6, 2011,the County submitted the design of the closure cap extension, executing the design approved in January 2008. On October 10, 2011, the County drilled three wells in Caltrans property to assess the extent release of the plume as required by RWQCB order. VOC's related to LFG were discovered at each well. The extent of release could not be reliably assessed with these wells. To document this work, a"Well Completion Report"was submitted December 14, 2011, and an EMP report was submitted January 31, 2012. In February 2012 a second set of three wells were installed and sampled, again in Caltrans property. The results from these analyses allow confident estimate of the extent of release. On March 15, 2012,the County and Caltrans received a Notice of Violation for failure to submit an acceptable closure design, after finding that the design concept approved in 2008 was not acceptable. Corral Hollow Sanitary Landfill 5 Department of Public Works/Solid Waste 1 st Quarter 2012 Groundwater Monitoring County of San Joaquin—April 16,2012