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{ Y (2) Drainage plans with calculations shall be submitted for approval to Development Services Division for all graded slopes and terraces. Terraces for reclaimed final slopes shall be sloped back towards the fill and be designed so that runoff is directed to collection points where it can enter catch basins and be conveyed via"pipes or other acceptable conveyance to the toe of slope. The spacing of collection points shall be no greater than 1,500 feet, and each reclaimed final slope face that has terracing shall have a minimum of one down drain. The method of transporting the.water along the flow line of the terrace to the down drain,to prevent erosion and possible slope failure, shall be approved by the Development Services Division. The method of drainage of terraces for temporary slopes at setback lines shall be submitted to Development Services Division for approval. (3) If an approved slope does not remain stable, and an inspection of the site confirms this condition,the review authority shall have the authority to reduce the slope or require other appropriate measures in the immediate area and other areas as deemed necessary in order to correct the condition as well as require the operator to caned the deteriorated slope. (Development Title Section 9- 1415.2{k(3))) (4) When required below to provide site-specific geologic and engineering slope stability analysis, the following minimum slope stability factors of safety shall apply: (A) A minimum factor of safety of 1.5 against static deep seated failure. (8) A minimum factor of safety of 1.5 against static surficial failure. (C) A minimum factor of safety of 1.1 against all types of seismic failure. The analysis shall be done by an independent laboratory selected by San Joaquin County, with the applicant. being responsible for the cost of the professionalized services plus an administrative fee of 15 percent. (5) Temporary cut slopes (i.e., for limited periods of time not to exceed three years, slopes that are in the process of extraction prior to being backfilled) at setback lines shall not exceed one foot horizontal to one foot vertical between terraces. Exception: Temporary cut slopes at setback lines to a maximum of one half of a foot horizontal to one foot vertical between terraces may be maintained if site- specific geologic and engineering analysis demonstrate through a slope stability analysis that the proposed temporary cut slopes will have a minimum slope stability factor of safety as required above. However, in the event that there are existing structures on the adjacent property (or the immediate potential for structures on the adjacerit property),to excavation shall am no time be closer to the property line than a line projected on a slope of one to one from the property line to the toe of the slope. Conditions of Approval -3 - QX-91-5 E