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• • Draft Supplemental Environmental Impact Report Page IV.G-5 . Forward Inc. Landfill 2018 Expansion Project • The Class 2 Permit Modification is requested as a result of changes in the number and location j of groundwater monitoring wells in a permitted groundwater quality monitoring system. The wells in question, MW-17, MW-18,and MW-19, are located in an area of the landfill that has been permitted to allow construction of a new WMU. Supporting information regarding the • proposed relocation of MW-17,MW-18, and MW-19 is provided in the following sections. • Landfill Special Waste Program Controls Special treatment programs that are ongoing at Forward Landfill include ash disposal, sludge ; solidification, co-generation plant, asbestos disposal, treated wood waste, and landfill gas management. These program elements are summarized in the Project Description. All such programs have required controls, testing, procedures and protocols that are reviewed and • approved by the regulators. For example, the sludge solidification agent must use compatible • materials allowed for acceptance at the landfill and once solidified, the material to be disposed of in the landfill or stockpiled in the landfill area for potential reuse/recycle pending approval of the local enforcement agency (LEA). Regional Surface Hydrology i Topography and Geography a The terrain at the landfill and surrounding vicinity consists of a relatively featureless plain. Both the North and South Branches of South Littlejohns Creek traverse the site, generally flowing from the east to the west, however the North Branch has been relocated north of the landfill • footprint and, as part of this project, a new future north-south creek crossing is proposed on this Branch. The South Branch of South Littlejohns Creek is proposed to rerouted as part of the Project. Original ground surface elevations range from 30 to 40 feet above mean seal level (amsl). Currently developed portions of the Forward Landfill reach a maximum elevation of approximately 194 feet amsl. . Surface Water Features The landfill property includes two local drainages, the North and South Branches of South Littlejohns Creek,which are within the Duck-Little John Hydrologic Area and are tributaries to the San Joaquin River. The South Branch of South Littlejohns Creek currently flows east-west across the new proposed new south infill area, thereby requiring the re-routing of the creek to the south and then north to rejoin the old creek channel. Approximately 2,900 feet of the South • Branch of the South Fork of Little John Creek is to be relocated to the southeastern boundaries • of the site in a new 3,400-foot channel to provide additional separation of the creek from the landfill. The project also would add a bridge crossing on the east side of the South Branch of South Littlejohn Creek as shown on Figure III.C32. The North Branch of South Littlejohns • Creek was realigned to the north and west of the Landfill in 2002, in order to place its channel • and floodplain outside the footprint of landfill areas. •