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According to the Forward Landfill Operations Manager, Forward Landfill received a total of 922,122 tons of solid waste during the 2010 monitoring year. Figure 1-2 shows the approximate location of waste placement during 2010 monitoring year. The following types of waste were received: Non-hazardous solid waste—898,723 tons Asbestos—9,307 tons Sewage and wastewater treatment sludge— 14,092 tons 4.2 LANDFILL GAS MONITORING The CEHD performs monthly inspections at the Forward Landfill for methane concentrations in perimeter soil-pore gas probes. During the 2010 monitoring year, several NOVs were issued for gas monitoring and control as a result of methane concentrations in perimeter soil-pore gas probe GP-11 exceeding the regulatory limit of 5 percent. In response to elevated methane concentrations, Forward submitted a LFG remediation plan to the CEHD and Cal Recycle, and in December 2010, BAS Construction completed the tasks outlined in the LFG remediation plan. During the December LEA inspection methane concentrations were less than 5 percent at gas probe GP-11 and all of the gas probes at the Forward Landfill. Furthermore, in accordance with CCR 27, Section 20937(a) (1), methane monitors are installed in all buildings at the site to protect public health and safety and the environment. During the 2010 monitoring year, no methane was detected in any of the facilities buildings. 4.3 COMPLIANCE RECORD During the 2010 monitoring year, CLs were consistently exceeded in Forward Unit wells MW-10 and MW-22 and intermittently in wells MW-2A, MW-13, MW-14,MW-15, MW-17, MW-18, and MW-21. However, no CL exceedances for impact constituents were verified in retest samples collected from the monitoring wells at the Forward Unit. In response to continued detection of VOCs in groundwater downgradient of the Austin Road Unit, the RWQCB issued a CAO on December 8, 2009. Forward installed four additional groundwater monitoring wells downgradient of the Austin Unit and is currently in the process of evaluating the vertical and lateral extent of groundwater impacts downgradient of the facility. In addition, Forward finished construction of a 12- inch, looped, City waterline system to the downgradient CYA facility on January 18, 2011 to supply potable water to the facility. 4.4 FORWARD UNIT 4.4.1 Groundwater Measured groundwater elevations during 2010 were generally static reflecting seasonal precipitation patterns. Hydrographs depicting groundwater elevations over the past 13 D:\2010_0013\FA_4Q10.doc 15 Geologic Associates