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WMU D-88 AB. Freeboard at WMU-F ranged from approximately 4.42 to 6.58 feet -10 during the fourth quarter 2012 monitoring period. Appendix A presents copies of the leachate logs and the freeboard observation logs. Leachate samples were collected on a monthly basis and analyzed in the field for pH, specific conductance, and temperature. In addition to monthly monitoring, leachate is sampled annually during the fourth quarter monitoring period for the parameters listed in Table 2-1. Results of monthly field monitoring measurements and analytical results for the fourth quarter 2012 are presented in Table 2-6. As shown in Table 2-6, seven VOCs, two semi-VOCs, 12 dissolved metals, and numerous inorganic constituents were detected in the fourth quarter 2012 leachate sample. No herbicides or pesticides were detected. Review of the annual 2012 leachate sample data indicates no new COCs were detected above PQLs, and therefore, no verification retesting is required. Surface Water Monitoring Site run-on and run-off control facilities are designed to effectively channel surface water to site stormwater/sedimentation ponds. According to the Operations Manager,there were no discharges to surface water during the reporting quarter. Samples were collected from surface-water monitoring stations FSW-1 and FSW-2 on December 19, 2012 for the fourth quarter monitoring period. Table 2-7 summarizes the current analytical results of surface water samples collected at the Forward Unit. As shown on Table 2-7, no VOCs were detected in either sample. Analytical results for the surface water samples are similar, suggesting that landfill operations are not impacting surface water quality. 2.2 SUMMARY For the Forward Unit, no significant changes in the water quality analytical results were noted. During the fourth quarter 2012 monitoring period,DIPE was measured in the sample from well MW-2A (1.1 µg/L) and acetone was measured in the sample from well MW-10 (35 µg/L). It should be noted that acetone is a common laboratory contaminant. No other VOCs were detected in the Forward Unit groundwater monitoring wells. CLs were exceeded for one or more inorganic constituents in wells MW-2A,MW-3, MW-10, MW-13,MW-14, and MW-15. However, no confirmation sampling is scheduled since previously submitted NRDs for the site have concluded that the CL exceedances for inorganic constituents are not a result of a release from the Forward Unit. The results of leachate monitoring are consistent with historical results and no new constituents were detected. Accordingly, no verification retesting is required. Surface water samples collected from the upstream and downstream surface water monitoring stations during the fourth quarter 2012 monitoring period are generally consistent with each other and no VOCs were detected. These results suggest that landfill operations are not impacting surface water. C:\2012-0025\FA4Q12.doc 7 Geo-Logic Associates