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Draft Supplemental Environmental Impact Report Page III-29 Forward Inc.Landfill 2018 Expansion Project The on-site water wells and a water storage tank provide water for fire suppression. The well at the entrance facilities area has a 1,500-gpm pump that feeds four valved connection points along the northern perimeter of the existing Forward Landfill. The well at the transfer station/materials recovery facility has a 500-gallon-per-minute(gpm)pump that feeds a 20,000-gallon pressurized tank. Lines from the tank lead to various locations. To reduce the risk of fire,preprocessed treated automobile shredder waste(PTASW)is disposed rather than stored for extend periods. If suppression of burning PTASW is needed,stockpiled soil would be used to cover and smother the burning PTASW. Security All areas and facilities,other than those expressly designated for use by haulers,are considered restricted areas. Security fences surrounding the site limit landfill access by unauthorized persons. Gatehouse personnel control access through the landfill entrance. The entrance to the site has a lockable gate and is locked outside of usual operating hours. Closure and Postclosure A Preliminary Closure and Postclosure Maintenance Plan has been prepared for the currently permitted Forward Landfill. The anticipated closure date for the existing Forward Landfill is in 2030. The current post-closure land use for the landfill is non-irrigated open space. Environmental Control and Monitoring Program Surface Water and Erosion Control The surface water control plan for the existing Forward Landfill consists of an integrated system of bench ditches,perimeter channels,and storm water retention basins. The final landfill is designed so that surface water would run off via sheet flow until it is intercepted by a bench ditch. Bench ditches subsequently drain toward downdrains,which discharge to perimeter channels. Finally, the perimeter channels drain to the sedimentation/detention basin. As required by the site's Waste Discharge Requirements(WDRs)issued by the Central Valley Regional Water Quality Control Board,permanent storm water runoff and drainage control facilities for the existing Forward Landfill have been designed to convey peak discharge resulting from 1,000-year,24-hour storm event runoff volumes. The storm water and drainage facilities of the proposed landfill expansion would be designed for the 1,000-year storm event. The drainage network for the completed landfill is designed to carry storm water at velocities that would minimize ditch erosion. Currently,all landfill surface water is routed to one of three sedimentation/detention basins. Two sedimentation basins are located in the southwest corner of the site,on either side of the South Fork. The basin located north of the South Fork collects runoff from the landfill area in the southern portion of the site,and the basin located south of the South Fork collects runoff from the