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▪ Maintenance program n Long term monitoring program, including performance and success criteria. ® Measures to assure protection from human disturbance and to protect the area from development in perpetuity. GEOLOGY AND SOILS(SECTION 4.4) Significant Impact Impact 4.4-1: As is true for the entire region, the project would likely be subject to one or more severe earthquakes and associated seismic hazards during the life of the project. Finding Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid the significant effects on the environment. Facts in Support of Finding The City of Pleasanton has adopted the following measures which will reduce potential impacts related to seismic events to a less-than-significant level: Mitigation Measure 4.4-1a: In general, landslide debris shall be removed where present and replaced with engineered fill in accordance with the approved corrective grading plan. More detailed information regarding the location, extent, and depth of the required landslide mitigation shall be depicted on the final project corrective grading plan to be submitted with the final grading plan, subject to review and approval by the City of Pleasanton Building and Safety Services Division. Mitigation Measure 4.4-1b: Landslide repairs shall be conducted on the natural slope behind Lots 24 and 25 (Landslide 17) and the proposed cut and fill slope adjacent to the driveway south of Lots 24 and 25 shall also be regarded. The finished slopes should be graded to approximately re-create the existing slope contours and to conform as much as possible with the adjacent natural slopes. Significant Impact Impact 4.4-2: Construction of the project on steep slopes could result in soil erosion or the loss of topsoil. Finding Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid the significant effects on the environment. Facts in Support of Finding The City of Pleasanton has adopted the following measures which will reduce potential impacts related to soil erosion to a less-than-significant level: Mitigation Measure 4.4-2a: In the event of a work stoppage due to rain during construction, the contractor shall construct positive slopes to carry water surface runoff away from steep slopes to storm drainage structures or other areas where erosion can be controlled. In no event shall a completed slope be left standing through the winter season without erosion control features being provided. Mitigation Measure 4.4-2b: The on-site geotechnical engineer shall determine the depth of topsoil in the field during grading. Identified top soil shall be reserved and placed on graded slopes Excess top soil that LUND RANCH II(PUD-25)RESIDENTIAL PROJECT 10 FINDINGS