PC-92-15 - Laserfiche WebLink

Geology, Soils, Grading and Drainage 1. Landslide activity. slo.pe instability IMPACT: The Commission finds that the extensive landslides on the site and potential for slope instability may have a significant effect. DEGREE: Significant. IMPACT: The Commission finds that implementation of mitigation measures 9aol through 9a.11 and conditions of approval 49 and 50 are feasible and these measures have been incorporated into the project design or into the project by reference through conditions of approval, and that they will be effective in reducing the impacts of this project to a less than significant level. 2. Gradin~ due to landslide renair IMPACT: The Commission finds that grading due to landslide repair may have significant visual, biological and topographic impacts and that such landslide repair as proposed now, without additional detailed studies, may not achieve the City's "acceptable risk" policies. DEGREE: Significant. FINDING: Although the SEIR recommends implementation of the Reduced Grading Alternative (MM 5at6e), the Commission fmds that this mitigation measure places too severe a limit on the development potential of the site, especially since the actual limits of landslide repair areas are not definitively known. Therefore, the Commission finds that an appropriate mitigating measure is to require preparation of detailed and definitive technical studies, prior to approval of a tentative map, which indicates the extent of landslide repair measures. The Commission may, at that time, elect to require elimination of lots whose creation would require landslide repairs beyond those contemplated by the SEIR (Condition 50). The Commission finds that this measure, in combination with MM 9a.l through 9a.ll, are feasible and these measures have been incorporated into the project design or into the project by reference through conditions of approval, and that they will be effective in reducing the impacts of this project to a less than significant level. 3. Gradin~ for develo.pment IMPACT: The Commission finds that generally, the project is sensitive to existing topographic features, and that grading ~ due to development may have a potentially significant impact in relation to soil erosion, differential fill settlement, expansive soil characteristics, etc. DEGREE: Potentially Significant. -13- .