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Responses to <br />Environmental Checklist <br />For CEQA Compliance <br />recommendations contained within the report. Compliance with the geotechnical <br />report recommendations would further reduce hazards due to seismic ground <br />shaking. Therefore, a significant impact would not occur. <br />3.) Seismic-related ground failure, including liquefaction? <br />Finding: Less than Significant Impact. <br />Analysis: According to Orange County General Pian Figure IX-12, the project area is <br />identified as being susceptible to liquefaction hazards. However, such conditions <br />are addressed in the site-specific geotechnical evaluation, and measures have <br />been identified to reduce such hazards to a level below significance. With <br />compliance with the project-specific geotechnical report, as is required by notes <br />provided on the Building Specifications for the project, impacts due to liquefaction <br />hazards would be reduced to a level below significant. <br />4.) Landslides? <br />Findin4: No Impact. <br />Analysis: The project area is fully developed with urban uses, and the area exhibits very <br />little topographic variation. As such, there would be no risk of landslides within <br />the project area, and significant impacts would not occur. <br />B. Would the project result in substantial soil erosion or the loss of topsoil? <br />Findin Less than Significant Impact. <br />Analysis: Construction of the proposed lift station and appurtenances would include <br />excavation and trenching operations that could result in potential short-term <br />erosion. Trenching at depths of approximately five to 10 feet would occur for the <br />proposed sewer line construction, while the proposed lift station would require <br />excavations up to a depth of approximately 30 feet below the surface. During <br />construction, groundwater would be controlled by dewatenng. Dewatering <br />systems would effectively intercept and remove water from the surrounding strata <br />and prevent its entry into the excavation area; therefore, all underground and <br />below-grade work will be performed in dry excavations, limiting the potential for <br />erosion. Due to the temporary nature of the proposed excavation process and <br />the implementation of dewatering, erosion impacts are not regarded as <br />significant. At completion of the project, existing surface improvements would be <br />replaced and/or upgraded. At project completion, therefore, erosion potential <br />would not be increased and would be that same as that which occurs under <br />existing conditions. <br />C. Would the project result in the loss of a unique geologic feature? <br />Finding: No Impact. <br />Page 45 of 64 <br />75E-49 <br />