(a) A grading plan must be submitted for all proposed development within a geologically similar area. Except for items that are expressly waived by the director, the following items must be included as part of the plan:
(1) A soil engineering report. This report must include data regarding the nature, distribution and strength of existing soils, conclusions and recommendations for grading procedures, design criteria for corrective measures when necessary, and opinions and recommendations covering adequacy of the site to be developed. The report must be signed by a registered professional engineer.
(2) An engineering geology report. This report must include an adequate description of the geology of the site, conclusions and recommendations regarding the effect of geologic conditions on the proposed development, and opinions and recommendations covering the adequacy of the site to be developed. The report must be signed by a registered professional engineer.
(3) Limiting dimensions, elevations or finish contours to be achieved by grading, and proposed drainage channels and related construction.
(4) Detailed plans for all surface and subsurface drainage devices, walls, cribbing, dams, and other protective devices to be constructed with or as a part of the proposed work, together with a map showing the drainage area and the estimated runoff of the area.
(b) Development within a geologically similar area must conform to the following performance standards:
(1) Grading must be planned so as to have the least disturbance on the area’s natural topography, watercourses, vegetation, and wildlife. This may preclude all development in certain areas. No cleared, graded, or otherwise disturbed land may be left without temporary protective stabilizing cover. (See Section 51A-5.206.)
(2) The maximum slopes permitted in geologically similar areas shall be determined by the director based on the results of the geotechnical investigations of the site materials and other factors analyzed in this division.
(3) Topsoil must be stockpiled and redistributed on areas where vegetation will be grown after the grading is completed. Methods to insure maintenance of these areas until vegetation is established must be detailed. (Ord. Nos. 19455; 26000)