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3.1.6 Domestic Well Monitoring Two domestic wells (7898-A and 8106-A)were sampled on November 3, 2011. Table 3- 3 summarizes the current analytical results for the domestic well samples collected. In the sample collected from well 7898-A, PCE was measured above the PQL and TCE was measured at a trace concentration. For the sample collected from well 8106-A, PCE and TCE were measured above their respective PQLs, and 1,1-DCA and cis-1,2-DCE were measured at trace concentrations. 3.1.7 Surface Water Monitoring During the fourth quarter 2011 monitoring period, surface-water monitoring stations ASW-1 and ASW-2 were sampled on November 7, 2011. Table 3-5 summarizes the current analytical results of surface water samples collected at the Austin Unit. As shown on Table 3-5, no VOCs were detected in the surface water samples collected during the monitoring period. A comparison of upgradient (ASW-1) to downgradient (ASW-2) surface water samples indicates generally similar inorganic constituent concentrations suggesting that the landfill operation are not impacting surface water quality. 3.1.8 Leachate Monitoring According to the Operations Manager, no leachate was taken off site during the fourth quarter 2011. The leachate collection system, which collects leachate from the north face of the landfill, has been operational since November 1996. WQPS (concentration limits) are not required for leachate because it is collected and removed for disposal, rather than discharged. According to the Operations Manager, the LCRS operated effectively during the fourth quarter 2011. Leachate samples were collected on a monthly basis and analyzed in the field for pH, specific conductance, and temperature. In addition to monthly monitoring, the 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 2011 are presented in Table 3)-6. As shown on Table 3-6, 12 dissolved metal constituents were detected; six VOCs were detected(with four measured above their PQLs); and two SVOCs were measured above their PQLs. No pesticides or herbicides were detected in the leachate sample collected during the fourth quarter 2011 monitoring period. Review of the annual 2011 leachate sample data indicates no new COCl were detected above the PQL, and therefore, no retesting is required. 3.1.9 Groundwater Treatment Facility Operations The Groundwater Treatment Facility(GTF) at the Austin Unit has been operational since 1994 to mitigate impacts from landfill releases. Currently, impacted groundwater is extracted from five wells (EW-1, EW-2, EW-3, EW-3R, and EW-4), treated, and discharged to an infiltration pond. During the monitoring period, the GTF treated c:\zoie-ooso\FA_4QILdoc 12 Geo-Logic Associates