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Leachate samples were collected from the pond on a monthly basis and analyzed in the <br /> 0 field for pH and specific conductance. The results of monthly field monitoring <br /> measurements are presented in Table 3-5. <br /> 3.1.9 Groundwater Treatment Facility Operations <br /> The Groundwater Treatment Facility(GTF) at the Austin Unit has been operational since <br /> 1994 to mitigate impacts from landfill releases. At the GTF, contaminated groundwater <br /> is extracted by two wells (EW-1 and EW-2), treated, and discharged to an infiltration <br /> pond. During the monitoring period CH2M Hill noted that the flow rate for groundwater <br /> extraction well EW-1 had decreased, and as a result, the extraction well has been taken <br /> offline pending well development and pump rehabilitation or replacement. Forward is <br /> currently in the process of making the necessary repairs to extraction well EW-1. During <br /> the monitoring period the GTF treated 19.654 million gallons of groundwater at an <br /> average flow rate of 152 gallons per minute, or 218,384 gallons per day. During the <br /> monitoring period, the GTF removed approximately 1.54 pounds of VOCs. <br /> 3.2 SUMMARY <br /> Groundwater quality conditions beneath the Austin Unit during the first quarter 2009 <br /> monitoring period were generally similar to historical results. Excluding suspected <br /> field/laboratory contaminants, CLs were exceeded in DMP wells AMW-6, AMW-7, <br /> AMW-13, and AMW-14, and with the exception of barium concentrations measured in <br /> well AMW-14, no CLs were exceeded for constituents that exhibited statistically <br /> significant increasing trends. In the CAP wells, trend analyses are performed instead of <br /> comparison to CLs. During the current monitoring period, one or more statistically <br /> significant increasing trends were noted for VOC constituents in CAP wells AMW-1, <br /> AMW-10, and AMW-19, while decreasing VOC trends were noted in CAP wells <br /> AMW-1, AMW-4,AMW-5/5R, AMW-10, and AMW-11. The increasing vinyl chloride <br /> and/or cis-1,2-DCE trends in wells AMW-1 and AMW-10 suggest that active reductive <br /> dechlorination is occurring in the vicinity of these wells. <br /> DA2009 0017TA 1Q09.doc <br /> 13 Geologic Associates <br />