Laserfiche WebLink
TABLE S.I: SUMMARY OF IMPACTS AND MITIGATION MEASURES (Continued) <br /> Environmental Impact Mitigation Measure Level of Significance After Mitigation <br /> K. Hydrology,Geohydrology,and Water Quality <br /> (Cont.) <br /> (c) The channel and floodplain storage easement are <br /> designed to accommodate the 100-year,24-hour <br /> storm with a three foot freeboard. <br /> K.3. Stormwater runoff from landfill surfaces,if not (a) The surface water conveyance system, including Less than Significant <br /> properly controlled,could contribute to the detention pond would be designed to handle <br /> increased peak flows downstream,or degrade the 100-year storm. <br /> surface water in receiving waters. <br /> (SIGNIFICANT) (b) Stormwater runoff from the working face would <br /> be collected at the edges of the landfill and <br /> routed to the perimeter leachate collection <br /> trenches. <br /> K.4. Uncontrolled erosion from soil stockpiles and (a) The final bridge design should include structural Less than Significant <br /> landfill surfaces,or inadvertent spills of refuse controls to prevent spilled or tracked sediment <br /> or other substances on-site could contaminate from entering the stream channel,and shall be <br /> surface water. (SIGNIFICANT) regularly cleared of accumulated sediment and <br /> refuse. Accumulated material should be properly <br /> disposed of in the landfill. <br /> (b) Additional measures described in Section III.G, <br /> Air Quality,Mitigation Measure G.1.,would also <br /> minimize dust impacts: <br /> K.S. Groundwater contamination.would result if the (a) Landfill design includes a 32 foot separation Less than Significant <br /> liner and leachate collection system for the between the liner and the groundwater. <br /> expansion failed. (SIGNIFICANT) <br /> (b) The liner and leachate collection systems for the <br /> expansion have been designed to meet or exceed <br /> the regulatory requirements. <br /> 5.25 <br />