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7.2.2.3 PROPOSED MONITORING PARAMETERS <br /> As listed in Table 18, the monitoring parameters that are proposed for the new <br /> Forward Landfill expansion are consistent with the parameters that are currently <br /> included at the two sites. <br /> 7.2.3 GROUNDWATER CONTROL <br /> Two groundwater extraction wells (EW-1 and EW-2) with a combined design <br /> capacity of 305 gallons per minute (gpm) were installed to extract impacted <br /> groundwater at the existing Austin Road Landfill (see Figure 7). VOCs are stripped <br /> from the extracted water at the facility's groundwater treatment plant, and the <br /> treated water is currently discharged to the North Branch of the South Fork of <br /> Little John's Creek. The groundwater treatment system and discharge are <br /> regulated under the Austin Road Landfill WDRs. <br /> As proposed in the Revised EFS prepared for the existing Austin Road Landfill by <br /> HA/AEE (2001), treated water would no longer be discharged to the North Branch <br /> but, would instead, be reintroduced to the aquifer in the vicinity of monitoring well <br /> MW-11. In combination with plans for an enhanced landfill gas collection system, <br /> reintroduction of treated water to the aquifer is expected to reduce existing VOC <br /> impacts below drinking water standards within 3 to 4 years. <br /> 7.2.4 POTENTIAL FOR IMPAIRMENT/CORRECTIVE ACTION FINANCIAL <br /> ASSURANCE <br /> 7.2.4.1 POTENTIAL RELEASE FROM THE WASTE MANAGEMENT UNIT <br /> Water quality impacts at waste management units (WMUs) are typically related <br /> to the following: surface water degradation associated with contact of refuse <br /> with surface water or liquid (leachate) and discharge from the WMU to surface <br /> waters; vadose zone degradation associated with either gas or moisture <br /> migration from the WMU; and groundwater degradation associated with WMU <br /> leachate or gas migration to the water table. In accordance with 27 CCR, <br /> Section 21750 (a), the following sections describe the anticipated pathways by <br /> which landfill constituents may be released and adversely impact water quality <br /> beneath and adjacent to the WMU. <br /> Forward Landfill JTD 7-6 <br /> L:\AIIied\2000.193\Reports\td:Sec-7.0:05/24/02 <br /> BRYAN A.STItaRAT Sa ASSOCIATES <br />