ORD 1503 - Laserfiche WebLink

d. If measures in the landslide repair plan would require destruction of heritage trees, the Planning Director shall be immediately notified. All reasonable options should be explored, including possible loss of lots or use of more elaborate engineering methods to minimize the lose of heritage trees. e. Site drainage shall be controlled so that landslides can be minimized. A stability analysis to assess the stability of fill areas and slopes shall be conducted. The analysis shall use laboratory test results from samples of material to be used as f~l. Areas of potential instability shall be identified and recommendations made for stabiliT:mtion, this shall include areas of previously buried refuse and construction mterial. g. The entire site shall be incorporated into a geologic hazards abatement district for the repair and on-going maintenance of landslides, unstable slopes, drainage systems, catch basins, siltation ponds, and other geologic hazards. h. All recommendations of the geotechnical engineer and certified engineering geologist shall be incorporated into the grading plan. i. Proper building setbacks from creeks and unstable slopes and construction of building foundations and cut and fill slopes shall be as specified by the geotechnical engineer and certified engineering geologist. The landslides for which building sethacks will be determined shall' be analyzed under static and dynamic conditions. The results of the stability analyses should include: a) cross sections showing the geometry of the subsurface units or discontinuities, the assumed water table, the search limits (if applicable) and the most critical failure surface(s); b) the assumed strength parameters for each units as well as the supporting laboratory test data (including normal pressures and strain rates); and c) the method of analysis. Back analysis of existing failures to calibrate strength parameters shall be conducted. k. All earth work, grading, fill placement, slope cutting, and drain installation shall be directly supervised by the geotechnical engineer and certified engineering geologist to verify compliance with recommendations and conditions. 1.' All plans and geotechnical reports shall be reviewed by a geoteclmical engineering firm retained by the City prior to the commencement of any grading or slide repair on the site. The applicant shall pay the cost of the City's consultant. All recommendations of the City's consultant shall be incorporated into the project, including those recommendations on the preliminary geologic review by William Cotton and Associates, dated November 30, 1990. m. An analysis of potential debris flow and soil creep shall be included with any tentative map application. This analysis shall include any appropriate mitigation measures.