14 ATTACHMENT 6 - Appendix A - E

City of Pleasanton–Spotorno Ranch Reduced Development Project Initial Study/Consistency Checklist Environmental Checklist FirstCarbon Solutions 103 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480021/Consistency Checklist/21480021 Spotorno Ranch Consistency Checklist ScreenCheck.docx Timing: Prior to (1) completion of sale or (2) occupancy (for non-owner-occupied buildings). MM H3 The developer shall prepare an earthquake preparedness and emergency response plan for each community use facility, including the proposed Golf Course clubhouse. Timing: Prior to occupancy of new development permitted by the Specific Plan. MM H4 For areas with slopes steeper than 20 percent or within or adjacent to existing landslides, a slope stability analysis (addressing static and pseudo-static conditions) shall be prepared by a licensed Civil Engineer and include the appropriate recommendations from the approved geotechnical report for any proposed residential development or roadway construction. These geotechnical reports shall provide recommendations for control of surface drainage, adequate groundwater drainage, and slide mass removal or stabilization, if necessary. The analysis shall be supported by investigation of site-specific conditions that shall include but not be limited to: • Estimated recency of slope failures and potential for continued movement; • Depth of existing landslides of colluvial deposits and characterization of slide plane(s); • Shear strength data for subsurface materials at the project site; • Groundwater level data which characterizes seasonal fluctuations; and • Justification of seismic coefficient used in pseudo-static analysis. Proposed cut and fill slope designs shall have factors of safety not lower than 1.5 under static conditions and 1.0 under seismic shaking conditions.23 Timing: Prior to approval of a grading plan. MM H5 Grading plans and slope designs are subject to the following requirements: • All grading plans cut and fill slopes, compaction procedures, and retaining structures shall be designed by a licensed geotechnical or civil engineer. • To the extent possible, (1) grading plans shall minimize earthmoving and site grading in areas of potential land instability, and (2) the development design shall avoid placing structures and utilities on or near the tops of slopes or in the shallow subsurface of slopes. Improvements proposed to be placed on slopes, or within 10 feet of the tops of slopes, shall be approved for construction by a licensed Geotechnical Engineer or Certified Engineering Geologist. • City shall approve grading plans and slope designs prior to implementation. 23 In the context of slope stability analysis, “factor of safety” describes numerically the ratio of forces that drive (cause) slope failure to the forces that resist failure.