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8-12= Fill Placement Procedures <br /> <br />The grading for the subdivision shall be performed as <br />recommended by the geotechnical and civil engineers. The <br />developer's engineers shall provide continuous inspection when <br />subdivision grading operations are being performed in order to <br />ensure the grading work is being performed properly. <br /> <br />8-132 Expansive Soil: Evaluation <br /> <br />A geotechnical investigation shall be performed on each lot <br />after subdivision grading is completed and prior to issuing <br />building permits. The expansion potential of the native <br />materials and fill on the lot shall be evaluated by the <br />project geotechnical engineer along with an evaluation of the <br />subsurface conditions observed during grading. A geotechnical <br />engineering report shall be issued for each lot or group of <br />lots with similar subsurface conditions along with <br />recommendation for selective lot grading and foundation design <br />and construction. The geotechnical engineer shall provide <br />foundation design, soil preparation and selective grading <br />recommendations which are.appropriate for the on-site soil and <br />geologic conditions observed after mass grading has bee~ <br />completed. All steel pipe shall be coated or have cathodic <br />protection. <br /> <br />8-14: Expansive Soil: Surface Drainaae Provisions <br /> <br />A. The surface drainage system on each lot shall be designed <br /> by a qualified civil' engineer and shall be compatible <br /> with the drainage system for the subdivision. The <br /> following items shall be included for the surface <br /> drainage system on each lot: <br /> <br /> 1. Concrete-lined "V" ditches shall be installed at <br /> the bases of all slopes greater that 15 feet high <br /> and adjacent to building pads. The ditches shall <br /> drain to a suitable outlet. <br /> <br /> 2. All building pads shall be rough graded with a 2 <br /> percent slope toward the streets. <br /> <br /> 3. All roof downspouts shall be connected to a solid <br /> pipe collector system which discharges to a <br /> suitable outlet. <br /> <br /> 4. The crawl space of each house or unit shall be <br /> connected to a solid pipe collector system which <br /> discharges at a suitable outlet. <br /> <br /> Page 13 of 19 <br /> <br /> <br />