PC-92-25 - Laserfiche WebLink

74. (MM 9.E.2) The surface drainage system on each lot should be designed by a qualified civil engineer and should be compatible with the drainage system for the sUbdivision. The following items should be included in each lot's surface drainage system: a. Surface drainage should be carefully controlled at the base of all slopes adjacent to building pads. The civil engineer should submit proposed drainage techniques to the city for approval; taking aesthetics as well as engineering criteria into account. Drainage improvements should be appropriate for the slope on the lot; concrete-lined V- di tches should be used only where equivalent and less obtrusive techniques are not appropriate for use. b. All building pads should be rough graded with a 2 percent slope. c. All roof downspouts should be connected to a solid pipe collector system which discharges at a suitable outlet. d. The crawl space of each house should be provided with a drainage system which will discharge all water which might enter the crawl space. e. The surface next to the house should be graded with a slope of at least 2 percent away from the house for a minimum distance of 4 feet. The lot should be drained with swales which slope 2 percent and discharge at a suitable outlet. f. Landscaping and walks should be installed such that the lot drainage system designed by the civil engineer is not disrupted. Water should not be allowed to pond on the lot. g. Conditions, covenants and restrictions for the subdivision should include the lot drainage requirements. Specif ic reference to drainage requirements should be included in the deed for each lot in order to prevent homeowners from altering drainage on the lot. 75. (MM 9.E.3) The recommendations and plans provided by the lot owner's geotechnical and civil engineers should be carried out completely and correctly by the owner's contractor. The geotechnical and civil engineers should provide continuous inspection during construction in order to ensure that their recommendations and plans are being properly implemented. 76. (MM 9.F.I) Prior to tentative map approval, the potential for seismically induced landslides and liquefaction must be investigated in detail. Detailed investigations are required for evaluation and preparation of slope stabilization plans. This investigation must include an evaluation of the potential for activation of landslides during an earthquake. If a high potential for activation exists then the slope stabilization