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accordance with WDR No. R5-2003-0049, verification samples will be collected from the Austin leachate sample point in February 2007 and reported with the first quarter 2007 monitoring report. ,p 1 During the 2006 monitoring year, groundwater elevations and groundwater and surface water sampling was performed at the Forward Landfill on a quarterly basis. The groundwater and surface water samples are analyzed for the monitoring parameters summarized in Table 2-1, and a summary of the 2006 annual monitoring data is provided in Appendix C. Time -series plots and piper diagrams depicting groundwater and surface water constituent concentrations are presented in Appendix D, and an electronic copy of the historical data is included in Appendix C. In addition, well hydrographs illustrating historical groundwater elevations, well screen elevations, and pump intake elevations are also included in Appendix D. According to the Forward Landfill Operations Manager, Forward Landfill received a total of 1,936,738 tons of solid waste during the 2006 monitoring year. Figure 1-3 shows the approximate location of waste placement during 2006 monitoring year. The following types of waste were received: Non -hazardous solid waste — 1,884,672 tons is Asbestos — 21,968 tons Sewage and wastewater treatment sludge — 30,098 tons During quarterly landfill gas monitoring activities, the CEHD regularly measured methane in perimeter soil -pore gas probes GP -9 and GP -12 at concentrations exceeding perimeter action levels of 5 percent. However, since the June 2006 inspection methane concentrations in all perimeter soil -pore gas probes have remained below 5 percent, suggesting that the landfill gas extraction system is effectively reducing methane concentrations along the perimeter of the site. 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 2006 monitoring year, no methane was detected in any of the facilities buildings. C7 D:\2003_02lWorwardAustin_fD6.dock 14 Geologic Associates