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Austin Road Landfill E Won Project <br /> ENVIRONMENTAL IMPACT MITIGATION MEASURE LEVEL OF <br /> SIGNIFICANCE <br /> AFTER <br /> MITIGATION <br /> J.2. Excavation and landfilling on the None Feasible LS <br /> project site would permanently convert <br /> prime agricultural land to non-agricultural <br /> use. ) <br /> (SIGNIFICANT) <br /> J.3. Over the life of the project,soils on (a)Should additional cover material be LS <br /> the project site may be determined to be of needed,alternative daily covers,approved <br /> inadequate supply and/or quality for use as by the CIWMB,shall be examined and <br /> daily cover, and soil import could be used. A demonstration project has already <br /> required. (SIGNIFICANT) been authorized. <br /> J.4 Seismic shaking could disturb slope (a) The project sponsor will comply with LS <br /> stability, drainage features, linear integrity, the requirements of the California Code of <br /> and settlement of the landfill,over the life Regulations(CCR)Title 27. The CIWMB <br /> of the project or after closure. will receive all documentation relating to <br /> (SIGNIFICANT) slope and foundation studies and design. <br /> & HYDROLOGY, <br /> GEOHYDROLOGY,AND WATER <br /> QUALITY <br /> K.1 Reconfiguration and relocation of the None Required LS <br /> North Branch of the South Fork of Little <br /> Johns Creek could alter the flow regime <br /> and affect flow velocity,erosion and <br /> sedimentation on the site or in the adjacent <br /> upstream or downstream reach of the <br /> stream. (LESS THAN SIGNIFICANT) <br /> K.2. The project would relocate the (a)The project includes channel LS <br /> existing 100-year floodplain,and if reconfiguration and localized flood <br /> inadequate replacement storage volume or protection berms to isolate the landfill <br /> routing of floodflows occurred, the project surfaces from floodwaters. <br /> could contribute to upstream or <br /> downstream flooding or expose the landfill (b)The project design also includes <br /> to effects of the 100-year flood. provision of replacement floodplain area <br /> (SIGNIFICANT) and storage volume in an easement along <br /> the relocated North Branch of the South <br /> Fork of Little Johns Creek. <br /> (c) The channel and floodplain storage <br /> easement are designed to accommodate the <br /> 100-year,24-hour storm. The design also <br /> includes a three foot freeboard. <br /> K.3. Stormwater runoff from landfill (a) The surface water conveyance system, LS <br /> surfaces, if not 2Merly controlled,could including the detention 2ond would be <br /> 26 <br />