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wells AMW-6, AMW-7, and AMW-12. Both wells AMW-13 and AMW-14 consistently <br /> contained VOCs at concentrations greater than the PQL. In the CAP wells, VOCs were <br /> consistently detected in wells AMW-1, AMW-10, AMW-19, and AMW-I 9BR at <br /> concentrations generally exceeding the PQL. Trend analyses indicate increasing trends <br /> were also noted for VOCs in wells AMW-1,AMW-10, AMW-19, and AMW-19BR. The <br /> increasing trend exhibited for cis-1,2-DCE at wells AMW-I and AMW-10, suggests <br /> reductive dechlorination is occurring in the vicinity of these wells. <br /> 4.5.2 Surface Water <br /> Surface water samples are collected quarterly from surface water stations ASW-1 and <br /> ASW-2. Comparison of the upgradient(ASW-1) to downgradient(ASW-2) surface <br /> water samples indicates generally similar concentrations and that the landfill operations <br /> are not impacting surface water quality. <br /> 4.5.3 Leachate Monitoring <br /> According to the Operations Manager, no leachate was taken off site during the 2011 <br /> monitoring year. The leachate collection system, which collects leachate from the north <br /> face of the landfill, has been operational since November 1996. WQPS (concentration <br /> limits) are not required for leachate because it is collected and removed for disposal, <br /> rather than discharged. According to the Operations Manager, the leachate monitoring <br /> and collection system operated effectively during the 2011 monitoring year. <br /> Leachate samples were collected on a monthly basis and analyzed in the field for pH, <br /> specific conductance, and temperature. In addition to monthly monitoring, the leachate is <br /> sampled annually during the fourth quarter monitoring period for the parameters listed in <br /> Table 2-1. The annual leachate sample results indicates that there were no new COCs <br /> were identified. <br /> C:\2011-0050\FA_4Q1Ldoc 16 Geo-Logic Associates <br />