ORD 1555 - Laserfiche WebLink

Geology, Soils, Grading and Drainage 52. Prior to submittal of a tentative map, the developer shall submit detailed geotechnical studies which determine all dimensions of the berm and catchment areas near Lots 1, 2 and 3. These areas shall be delineated on the tentative map preliminary gnding -plan. If the City detenmnes that the deflection berm and catchment area cannot provide adequate risk-protection under the CiW's Safety Element *acceptable risk* policy, then the at-risk lots must be eFxminated fWm the plan. 53. Prior to submittal of a tentative map, ~the applicant shah prclmh-c detailed geotechnical studies to determine the final landslide repai~ measures necessary to assure development of the project as appmved. If the ianti~llde x~pair measures extend beyond those anticipated in the geo~__~_-h,~t~ studies prepan=d to date (1uly 30, 1991) and as shown on me landslide buttress plan fFigure 9-3, Chap~ 9 of the S~R), the Planning Commission may elect to require eHmin=r~nn Of tho$~ lots whose creation would reqRizz lazldslide repair measux~ which the planning Corrtmi-~i~n determines would have adverse impacts -. visual, grading, ~e and vegetative etc., - on the environment. The planning CommissioD may rnak~ this decision whell it considers the tentative w-? approval for this project. 54. A comprehensive and thorough slope stability investigation is requized. Prior to the Tentative Map approval and issuance of a grading permit for the subdivision, all landslides and areas with a high potential for slope in.e~hility ShOtlid be identified, mspl~ and cazgorized as to their lx~-_~H-i effect on the development Th= pwjcct's ~eO~_~h-i~i engineer and/= certified exSineemg geologist should provide recommendations for i~abil]ntina of th~ ~ ide~tifie~. Th~ idelx~fied m should i/lc~ude a]l l~ntt~Hde~ ~ pO~__~H~! l~nfi~Htis~ on-site and nil hzldsiid~ off-site that may impact on-site development, as well as landslides on-site that may affect adjacent properties. This work should include preparation of a detailed geologic map and pezformance of a subsurface investigation within each area with a high pof__,nri,~ for futttre slope movement. A thorough slope stability analysis should include considerations of the maximum seismic accelmxioB which might be transmitted. especially in x~gZ~t to uuuat~ soil comti~on~. The pr~ect engineer and eug~nee~g geologist also should provide x~:ouunmda~us for locatimx of a s,,it~.!e buikiing ~ for p~h ~ lot. Additional _l~o__mm~d~t~t~ should be made a~ to the or pof~"-~ slope failu~. 0d~ 9.A~I) SS. A detailed cons~ucfion plan should be prepared by the projects geo~"-~ and/or ~ engineering geologist for the s~b~-~u of all on-s~ landslides and c!_~d section and p~ strewing the ~n~t of wo~ along with ~ grading