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pumped into the surface impoundment(WMU F) for evaporation. During the 2008 <br /> monitoring year, leachate was only observed at holding areas WMU-D89, WMU-D93/94, <br /> WMW-D0l, WMU-1302, WMW-FU03, WMW-FU04, WMU-FU05, and WMW-FU06. <br /> The other holding areas were reported to be dry by Forward Landfill personnel. <br /> Freeboard at WMU F ranged from approximately 6.17 feet to 12.08 feet during the 2008 <br /> monitoring year. The results of the annual leachate sample indicate that there was one <br /> potentially new COC (2,4-dichlorophenol). Verification testing of leachate for the SVOC <br /> (2,4-dichlorophenol) will be performed in May 2009. <br /> The results of the LCRS gas test conducted in August 2008 at the Forward Unit indicated <br /> that an open-air conduit is present across the LCRS unit, allowing sufficient leachate <br /> evaporation. Based on freeboard logs, LCRS gas testing, and observations from Forward <br /> personnel, the leachate control facilities were operating effectively during the 2008 <br /> monitoring year. <br /> 4.5 AUSTIN UNIT <br /> 4.5.1 Groundwater <br /> Measured groundwater elevations during 2008 generally reflect seasonal precipitation <br /> patterns. Hydrographs depicting groundwater elevations over the past 11 years are <br /> presented in Appendix D. Overall groundwater flow direction during the 2008 <br /> monitoring year were generally consistent with past monitoring periods with flow <br /> generally directed to the north-northwest with an average gradient of 0.002 ft/ft. <br /> Groundwater quality conditions beneath the Austin Unit during the 2008 monitoring year <br /> are generally similar to those observed in the previous monitoring year. For DMP wells, <br /> CLs were consistently exceeded in wells AMW-13 and AMW-14 as a result of detected <br /> VOCs. Both wells consistently contained VOCs at concentrations greater than the PQL. <br /> In the CAP wells, VOCs were consistently detected in wells AMW-1, AMW-4, AMW- <br /> 10, and AMW-I 9A at concentrations exceeding the PQL. Trend analyses indicate <br /> increasing trends were consistently noted for VOCs in wells AMW-I and AMW-10, and <br /> AMW-19A. <br /> 4.5.2 Surface Water <br /> With the exception of the fourth quarter monitoring period, where both surface-water <br /> stations were reported to be dry, surface water samples were collected quarterly from <br /> surface water stations ASW-1 and ASW-2 during the 2008 monitoring year. During the <br /> year, no CLs were exceeded at downgradient surface water station SW-2. Comparison of <br /> the upgradient (ASW-1) to downgradient(ASW-2) surface water samples indicates <br /> generally similar concentrations and that the landfill operations are not impacting surface <br /> water quality. <br /> D:U008001 0%FA_4Q08.doc <br /> 16 GeoLogic Associates <br />