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Draft Environmental Impact Report Page III-19 <br /> Forward Inc. Landfill Expansion <br /> t <br /> monitoring and the Corrective Action Program(CAP)for groundwater contamination(discussed <br /> Fbelow). Figure IV.F-1 shows the location of the monitoring wells. <br /> The northern portion of the landfill (former Austin Road Sanitary Landfill) is currently under a <br /> E Corrective Action Program (CAP) for groundwater contamination by volatile organic <br /> F compounds (VOCs). To comply with the CAP, a groundwater extraction and treatment system <br /> has been installed to mitigate detected chlorinated hydrocarbon in the first encountered <br /> { groundwater beneath the former Austin Road Sanitary Landfill. This system includes thirteen <br /> groundwater-monitoring wells, as shown in Figure IV.F-1. <br /> T Groundwater Control <br /> '4Two groundwater;extraction wells with a combined design capacity of 305 gallons per minute <br /> (gpm)were installed to extract polluted groundwater at the northern portion of the landfill (the <br /> former Austin Road Sanitary Landfill). VOCs are stripped from the extracted water and the <br /> treated water is discharged to a recharge basin north of the North Branch of the South Fork of <br /> Littlejohns Creek, where it recharges the underlying aquifer. The groundwater treatment system <br /> 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 /> Y. <br /> plant. <br /> FThere are two active landfill gas extraction systems at the Forward Landfill. One system consists of <br /> 18 wells and provides control for parts of the northern portion of the site(the former Austin Road <br /> Sanitary Landfill). Landfill gas from this 18-well system is conveyed to the electric generation <br /> plant located at the northwest corner of the site(see Existing Storage and Support Facilities, above). <br /> The second landfill gas extraction system encompasses the majority of the site, and consists <br /> primarily of 216 vertical gas wells. Landfill gas is collected through a perimeter 18-inch gas <br /> collection header and is destroyed at the flare station located at the northeast corner of the site. The <br /> .., flare station consists of two enclosed ground glares located at the northeast corner of the landfill, ' <br /> with a combined capacity of 5,400 cubic feet per minute (cfm), <br /> h <br /> As discussed in F.Proposed Project Modifications,Additional Electricity Generation with Landfill Gas, <br /> below,additional electricity generation using landfill gas is proposed as part of the project. <br /> Dust <br /> I <br /> Dust is controlled at the landfill by (1)maintenance of haul roads(paving, grading, and <br /> watering); (2) application of fine water spray(minimum of twice daily)on the active <br /> soil-covered work areas, soil excavation areas, and soil stockpile areas where conditions may <br /> result in fugitive dust; (3) application of organic dust suppressant, and(4) limiting the speed of <br /> all on-site vehicles to less than those that would cause visible dust emissions behind the vehicle. <br /> For dust control purposes, surface-water runoff or on-site well water is applied to all main <br /> access and haul roads and unpaved equipment parking areas at least once per day. All-weather <br /> surfacing is applied to any unpaved road segment that carries 50 or more vehicle trips per day <br /> continuously for more than thirty days. <br /> f7 <br /> F < i <br />