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7.3 SURFACE WATER 7.3.1 SURFACE WATER PROTECTION The only surface water bodies in the vicinity of the site are the North Branch and South Branch 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 this JTD anticipate that the course of the North Branch wil[ibe;reahgned ta„the .north.and west.of-the Austin Road Landfill. Once the North Branch is realigned, the planned expansion area footprint will be outside floodplain areas. 7.3.2 SURFACE WATER MONITORING Surface water monitoring is completed quarterly at both the existing Austin Road and Forward Landfills in accordance with each-site's WDR`s. MDnitoringis performed for the North Branch and South Branch of Little Johns Creek for the existing Austin Road and Forward Landfills, respectively (see Figure 7). Table 19 lists the surface water monitoring stations at the-site together vuith..their currentand expected future use. 7.4 NPDES STORMWATER MONITORING PROGRAM The existing Forward and Austin Road Landfills have stormwater monitoring programs in place which comply with the State's National Pollutant Discharge Elimination System (NPDES) requirements. Storm Water Pollution Prevention Plans(SWPPPs) have been prepared for the landfills as part of the State's NPDES General Permit requirements for stormwater inspection, sampling, observations and reporting. Stormwater sampling is required on two occasions each year during the wet season, starting with the first rain that produces a significant runoff flow. Updated plans for the combined facility Forward Landfill will be prepared prior to the filling of those areas. Forward Landfill JTD 7-10 L:\Allied\2000.193\Reports\finaljtd:Sec-7.0:08/20/01 ®RYAN A.STIRRAT&ASSOCIATES