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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 theexistingAusfin:, fgl;4see..Figwe,7)..,..V.00s are,stripped <br /> from the extracted water at the facility's groundwater treatment plant, and the <br /> treated water is currently disc har ,,to-the-North$r ck The,-groundwater <br /> treatment system and discharge are regulated under the Austin Road Landfill <br /> WDRs. <br /> As proposed in the Revised EFS recently prepared for the existing Austin Road <br /> Landfill by HA/AEE (2001), treated water would no iongerbe discharged`,to the <br /> North Branch but, would instead, be reintroduced to the aquifer in the vicinity of z <br /> monitoring well MW-11. In combination with plans for an enhanced landfill gas <br /> collection system, reintroduction of treated water to the.aquifeuis.expected..to <br /> reduce existing VOC 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:\Allied\2000.193\Reports\finaljtd:Sec-7.0:08/20/01 BRYAN A.STIRRAT&.ASSOCIATES <br />