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Draft Supplemental Environmental Impact Report Page III-27 <br /> Forward Inc. Landfill 2014 Expansion Project <br /> YAW Leachate Monitoring <br /> To monitor the LCRSs,Forward,Inc.conducts a leachate monitoring and sampling program in <br /> 1+. compliance with WDR Order No.R5-2014-0006. Quarterly and annual reports of the monitoring <br /> results are submitted to the DTSC,RWQCB,and the San Joaquin County Environmental Health <br /> Department,which is the Local Enforcement Agency(LEA). <br /> A leak detection system is also located under the sumps in the WMUs and the leachate <br /> impoundments. The leak detection system currently consists of suction cup lysimeters and pan <br /> lysimeters installed in all the Subtitle D lined WMUs with permanent sumps(i.e. WMU D-93,D-01, <br /> L' D-02,FU-03,FU-04,FU-05,and FU-06). A suction lysimeter is a device that measures the soil pore <br /> water in the unsaturated zone,while a pan lysimeter measures the water that percolates down <br /> from below the sump. The lysimeters are sampled and tested in accordance with the site's WDRs. <br /> The former Austin Road Landfill unit has no leachate collection system and therefore no <br /> lysimeters. <br /> Groundwater Monitoring <br /> The groundwater-monitoring system at the existing Forward Landfill is designed to detect the <br /> presence of contaminants in groundwater by analyzing groundwater chemistry at <br /> point-of-compliance wells. The monitoring system consists of 20 Detection Monitoring Program <br /> (DMP)wells,nine Corrective Action Program(CAP)wells,and 19 Evaluation Monitoring Program <br /> (EMP)wells.The DMP wells are designed to detect a potential release from the landfill at <br /> point-of-compliance,while the CAP wells are used to evaluate changes in water quality and the <br /> effectiveness of the current corrective action measures. The 19 EMP wells were constructed a part <br /> of an on-going investigation. Figure IV.F-1 of the 2013 EIR shows the location of the monitoring <br /> Aw wells. Groundwater monitoring is described in detail in the Hydrology and Water Quality <br /> Chapter of the 2013 EIR. <br /> Groundwater Control <br /> w- <br /> Two groundwater extraction wells with a combined design capacity of 305 gallons per minute <br /> (gpm)were originally installed to extract polluted groundwater at the Austin Unit. An additional <br /> two groundwater-extraction wells were installed in April 2009. VOCs are stripped from the <br /> extracted water and the treated water is discharged to a recharge basin north of the North Branch <br /> of the South Fork of Littlejohns Creek,where it recharges the underlying aquifer. The <br /> L groundwater treatment system and discharge are regulated by the RWQCB under WDRs. <br /> Air Quality Control <br /> +• Landfill Gas <br /> The current landfill gas control system consists of a series of collection wells interconnected by <br /> above-ground laterals and a main header pipe connected to a flare station and electric generation <br /> plant. <br /> Until 2012,there were two active landfill gas extraction systems at the Forward Landfill. One <br /> system consisted of 18 vertical extraction wells with three horizontal collectors and provided <br /> control for parts of the northern portion of the site(the former Austin Road Sanitary Landfill). <br /> Landfill gas from this 18-well system was conveyed to the formerly operating Covanta/Republic <br /> .. electric generation plant located at the northwest corner of the site(see Existing Landfill Storage <br /> and Support Facilities,above). The Covanta/Republic plant is no longer operational. The second <br /> v <br /> 1 <br />