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Draft Environmental Impact Report Page II-16 <br /> Forward Inc. Landfill Expansion <br /> r <br /> ate groundwater Identified in This EIR: Less than <br /> on wells located Mitigation measure F.6,below, applies to this impact. Signi€icant <br /> dient of the <br /> oad Landfill are <br /> at risk from the VOC- <br /> contaminated <br /> groundwater plume. <br /> E.S. A health risk could Less than Significant. None required. Less than <br /> result from cumulative Significant <br /> exposures to the landfill <br /> refuse,by-products of the <br /> landfill, or products used <br /> in the operation of the <br /> landfill. <br /> F.HYDROLOGY AND <br /> WATER QUALITY <br /> F.1. Uncontrolled Proposed as Part of the Project: Less than <br /> flooding could result Significant <br /> during peak rainfall An updated JTD by the applicant would be completed to include a new drainage <br /> events and result in study for the proposed expansion. The drainage study would utilize San <br /> contamination of surface Joaquin County local rainfall data and the Rational Method would be used to <br /> water bodies through estimate maximum potential runoff. The surface water control system and <br /> contact between the drainage control structures for the proposed project would be sized to <br /> landfill refuse and accommodate the calculated peak flows. <br /> surface water. <br /> • As part of the design plans for the proposed landfill, Forward Landfill would <br /> complete calculations of the 1000-year,24-hour storm event peak discharges. <br /> The hydraulic and drainage study would be used to design appropriate drainage <br /> controls. Drainage controls would be designed to prevent contact between <br /> surface water and refuse. Site run-on and run-off control facilities consist of <br /> drains and perimeter ditches that channel surface water to holding and <br /> evaporation ponds on the site. The surface-water collection drains stem would <br />