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® enable the landfill to maintain compliance with regard to sub-surface gas <br /> migration. <br /> In addition, a condensate management system was installed to handle <br /> condensate that collects in the low points of the landfill gas extraction system <br /> piping. Sump pump stations are utilized to transfer condensate from these low <br /> points to a holding tank located at the flare station or to the leachate evaporation <br /> ponds. <br /> 4.4.2 WATER QUALITY MONITORING SYSTEM <br /> 4.4.2.1 GROUNDWATER MONITORING <br /> The current groundwater monitoring system at the landfill consists of <br /> 36 groundwater monitoring wells, which meet Detection Monitoring Program <br /> (DMP) and CAP monitoring requirements. The first encountered groundwater is <br /> measured approximately 60 to 80 feet below native ground surface. <br /> As is more fully described in Section 2.6, a groundwater extraction system has <br /> 0 been installed to treat contaminated groundwater in the area of the former <br /> Austin Road Landfill. The groundwater extraction system consists of two <br /> groundwater extraction wells (EW-1 and EW-2) with a combined design capacity <br /> of 305 gallons per minute (gpm). Volatile organic compounds (VOCs) are <br /> stripped from the extracted water and the treated water is used to artificially <br /> recharge the shallow aquifer. The site is currently monitored in accordance with <br /> WDR Order No. R5-2003-0049. Figure B shows the location of groundwater <br /> monitoring and extraction wells. <br /> 4.4.2.2 SURFACE WATER MONITORING <br /> The only surface water bodies in the vicinity of the site are the North and South <br /> Creeks, which are tributary to the San Joaquin River. The North Creek flows <br /> along the northern border of the landfill and the South Creek traverses the <br /> southern portion of the site. <br /> Noncontact surface water (stormwater that has not come in contact with refuse) <br /> is directed to one of three onsite sedimentation basins. One pond is located in <br /> Forward Landfill-Project Description 4-13 BRYAN A.STIRRAT&ASSOCIATES <br /> (j:\Allied\Forward\2007.0018 Lateral Expansion\Reports\Proj Descrip\021308 Final Proj Des\Sec 4.doc:2/13/2008) <br />