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1.4 SOLID WASTE MONITORING According to the Forward Landfill Operations Manager,Forward Landfill received a total of 472,212 tons of solid waste during the second quarter 2006 (Appendix A). Figure 1-2 shows the approximate location of waste placement during the second quarter 2006 monitoring period. The following types of waste were received: Non-hazardous solid waste—462,706 tons Asbestos— 1,013 tons Sewage and wastewater treatment sludge—8,493 tons 1.5 LANDFILL GAS MONITORING During the April and May 2006 monthly landfill inspections, the CEHD regularly measured methane in perimeter soil-pore gas probes GP-11 and GP-12 at the Forward Landfill with concentrations up to 33 percent. However,during the June inspection both soil-pore gas probes reported methane a concentrations less than 3.5 percent, suggesting a relative improvement in landfill gas at the site. In response to elevated methane concentrations measured in these probes, and in accordance with California Code of Regulations Title 27, Section 20937,Forward is currently installing additional landfill gas extraction wells and is working on optimizing the efficiency of the landfill gas extraction system. Furthermore, in accordance with CCR Title 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 second quarter 2006,no methane was detected in any of the facilities buildings. A copy of the landfill gas monitoring probe data is provided in Appendix A. 2.0 FORWARD UNIT 2.1 WATER QUALITY MONITORING 2.1.1 Sampling and Laboratory Analyses During the second quarter 2006, all of the groundwater monitoring wells and surface water stations were sampled by Bryan A. Stirrat &Associates (BAS), an affiliate of GeoLogic Associates (GLA) on May 22 and 23, 2006. Prior to collection of samples, depth-to-water measurements were recorded in all groundwater monitoring wells on May 22, 2006. All lysimeters were inspected and a vacuum was set on May 22, 2006. The lysimeters were checked for soil-pore liquid on June 8, 2006 all lysimeters were dry and, therefore samples could not be obtained. A single sample set was collected from each sampling point and submitted to BC Laboratories,Inc. (BC) of Bakersfield, California, a state certified laboratory under contract to Forward. Samples were analyzed for the parameters stipulated in RWQCB Order No. R5-2003-0049. Table 2-1 summarizes site monitoring parameters, analytical methods, and monitoring frequency. Water quality samples were also analyzed in the D:\2003 021\ForwardAnsdn_sp06.doc 4 Geologic Associates