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2.2.1.3 PROPOSED MONITORING PARAMETERS As listed in Table 6, the monitoring parameters that are proposed for the new Forward Landfill expansion are consistent with the parameters that are currently included at the two sites. 2.2.2 GROUNDWATER CONTROL Two groundwater extraction wells (EW-1 and EW-2) with a combined design capacity of 305 gallons per minute (gpm) were installed to extract impacted groundwater at the existing Austin Road Landfill (see Figure 2). VOCs are stripped from the extracted water at the facility's groundwater treatment plant, and the treated water is currently discharged to the North Branch. The groundwater treatment system and discharge are regulated under the Austin Road Landfill WDRs. As proposed in the Revised EFS recently prepared for the existing Austin Road Landfill by HA/AEE (2001), treated water would no longer be discharged to the North Branch but, would instead, be reintroduced to the aquifer in the vicinity of monitoring well MW-11. In combination with plans for an enhanced landfill gas collection system, reintroduction of treated water to the aquifer is expected to reduce existing VOC impacts below Maximum Contaminant Levels (MCLs) (drinking water standards) within five years and below the Water Standard (1 part per billion) within nine years. 2.3 SURFACE WATER 2.3.1 SURFACE WATER PROTECTION The only surface water bodies adjacent to the site are the North Branch and South Branch of the South Fork of Little Johns Creek which are tributary to the San Joaquin River. The North Branch flows along the southern border of the existing Austin Road Landfill, and the South Branch flows along the southern border of the existing Forward Landfill. The landfill development plans described in the JTD incorporate the realignment of the North Branch to the north and west of the Austin Road Landfill. Forward Landfill PCPCMP 2-4 L:\Allied\2000.193\Reports\FinaIPCPCMP:FL•sec2.doc:5/21/02 BRYAN A.STIRRAT 6 ASSOCIATES