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Draft Supplemental Environmental Impact Report Page IV.G-1 Forward Inc. Landfill 2018 Expansion Project G. HYDROLOGY AND WATER QUALITY ' This chapter includes a description of the existing hydrologic and water quality conditions at the current and proposed Forward Landfill,including the proposed expansion areas.This ' section updates the 2013 EIR's environmental evaluation of the landfill expansion.The currently permitted site includes both the former Forward and Austin Road Landfills,which were consolidated in 2003.While the landfill operates essentially as one unit now,the regulatory ' history of having to separate landfills under separate Regional Water Quality Control Board (RWQCB) Orders has resulted in some separation still being maintained in that the RWQCB looks at the landfill as having two operable units. ' In addition to the two proposed landfill expansion areas(referred to as the north and south expansion areas),the expansion project would include the construction of two new ' sedimentation basins and two new leachate ponds as shown on Figure III.0-4. The compost pond would be closed,new stormwater and leachate ponds would be added in the entrance facility area, and the existing leachate and stormwater pond in southwest corner would be ' expanded. The new sedimentation basins and leachate ponds are replacements for existing facilities proposed for closure as part of the expansion project.The implementation of this project also requires the relocation of the South Branch of South Littlejohns Creek,which ' currently is located on the proposed southern expansion site. Setting Regulatory Setting Federal Agencies and Regulations ' Federal Water Pollution Control Act The purpose of the Federal Water Pollution Control Act(Clean Water Act) (administered by the U.S.Environmental Protection Agency [EPA])is to protect and maintain the quality and integrity of the nation's waters by requiring states to develop and implement state water plans and policies. Water Quality Standards. Section 303 of the Clean Water Act establishes water quality standards consisting of designated beneficial uses of water bodies and water quality standards to protect ' those uses for all Waters of the United States. Under Section 303(d) of the Clean Water Act, states,territories, and authorized tribes are required to develop lists of impaired waters. Impaired waters are those that do not meet water quality standards,even after point sources of pollution have installed the required levels of pollution control technology.The law requires that these jurisdictions establish priority rankings for waterways on the impaired list and develop action plans to improve water quality.This process includes development of Total Maximum Daily Loads(TMDLs)that set waste load allocations for point sources and load allocations for non-point source pollutants.The Ducheny Bill(Assembly Bill(AB) 1740) requires the State Water Resources Control Board (WRCB) and its nine RWQCBs to post this list and provide an estimated completion date for each TMDL. I