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2.1.6 Surface-Water Monitoring Site run-on and run-off control facilities are designed to effectively channel surface water to lined holding and evaporation ponds on site. According to the Operations Manager,no surface water was discharged from the facility during the reporting quarter. During the first quarter 2006 monitoring period surface water stations FSW-1 and FSW-2 were sampled on January 31, 2006. Table 2-6 summarizes the analytical results for surface water samples collected at the Forward Unit. A comparison of upgradient(FSW-2)to downgradient(FSW-1) surface water samples indicates generally similar concentrations. Overall the sample results indicate 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 first quarter 2006,leachate was observed at holding areas WMU-D93/94,WMW-DOI,WMU- D02,WMU FU-03,WMU FU-04, and WMU FU-05. The other holding areas were reported to be dry by Forward Landfill personnel. Freeboard at WMU F ranged from approximately 5.58 feet to 10.67 feet during the first quarter 2006 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 and specific conductance. In addition to monthly monitoring,the leachate was sampled during the first quarter 2006 monitoring period for the annual parameters listed in Table 2-1. The results of monthly field monitoring measurements and analytical results for the first quarter 2006 are presented in Table 2-7. As shown on Table 2-7, 10 dissolved metal constituents were measured in the leachate sample with eight measured above the PQL; eight VOCs were measured in the leachate sample with 5 measured above the PQL; and one trace-level pesticide was measured. No SVOCs or herbicides were detected in the leachate sample collected during the first quarter 2006 monitoring period. 2.2 SUMMARY Groundwater quality conditions beneath the Forward Unit during the first quarter 2006 monitoring period are generally similar to those observed in previous monitoring periods. Thirteen new historical intrawell maximum values were measured, including one first- time VOC detection, in samples collected from groundwater monitoring wells. In addition,three trace-level VOCs were measured in well MVV-10,three trace-level VOCs and one low-level VOC (measured above the PQL)were measured in well MW-14, one VOC (acetone, a common laboratory contaminant)was measured in well MW-19, and one trace-level VOC was measured in well MW-23R. The Forward Unit remains in corrective action proof monitoring for corrective actions implemented in 1995 for intermittent low-level VOCs. D:\2003_021\ForwardAusBn_w06.doc\4/20/2006 8 Geologic Associates