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will be resampled in November during the fourth quarter 2008 sampling event and a second independent sample will be collected in December 2008. The results of the retesting events will be submitted to DTSC and RWQCB under separate cover. 2.1.5 Vadose Zone Monitoring The current vadose-zone monitoring network at the Forward Unit consists of 17 lysimeters. The lysimeter locations are shown on Figure 2-1. Each accessible lysimeter was inspected and vacuums were reset to approximately—5 to—25 inches of mercury on August 14, 2008. On September 10, 2008, the lysimeters were again checked and positive pressure was applied to evacuate the accumulated sample. As recorded in the field notes for lysimeters (Appendix C) and summarized on Table 2-5, lysimeters W-2, LY-A, and LY-BG-1 had a sufficient volume of soil-pore liquid for sample collection. However, due to the limited sample volumes, lysimeter samples were only analyzed for select inorganic constituents and/or VOCs. As shown in Table 2-6, two VOCs(both above the PQL), were measured in the lysimeter samples collected during the third quarter 2008 monitoring period. However, it should be noted that the concentration of t-butyl alcohol measured in the sample collected from lysimeter LY-BG-1 is a suspected field/laboratory contaminant since this VOC was also detected in a QA/QC blank sample. 2.1.6 Surface Water Monitoring Site -on and run-off control facilities are designed to effectively channel sace water to site sto water/sedimentation ponds. According to the Operations Manager, no surface water was discharged from the facility during the reporting quarter. During the third quarter 2008 monitoring period, surface-water monitoring stations FSW-1 and FSW-2 were sampled on August 11, 2008. Table 2-8 summarizes the current analytical results for surface water samples collected at the Forward Unit. No VOCs were detected in the samples collected from the surface water stations during the third quarter 2008 monitoring period. A comparison of upgradient(FSW-2) to downgradient(FSW-1) surface water samples indicates generally higher inorganic constituent concentrations in the upgradient station(FSW-2) suggesting that the landfill operations are not impacting surface water quality. 2.1.7 Leachate Monitoring Leachate sumps are inspected for the presence of leachate and observations are recorded at least weekly by Forward Landfill personnel. If leachate is detected in a sump, it is pumped into the surface impoundment(WMU F) for evaporation. During the third quarter 2008, leachate was observed at holding areas WMU D-89,WMU D-93/94, WMU D-01,WMU D-02,WMU FU-03,WMU FU-04, WMW FU-05, and WMU FU-06. The other holding areas were reported to be dry by Forward Landfill personnel. Freeboard at WMU-F ranged from approximately 7.5 feet to 11.08 feet during the third quarter 2008 monitoring period. Appendix A presents copies of the leachate logs and the freeboard observation logs. D:\2M_001"k3Q0&doc 7 Geologic Associates