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g. HOURS OF OPERATION: Plant operations shall normally be carried on during the hours from 5:00 a.m. to 9:00 p.m. In. REPLACEMENT OF TOPSOIL AND REVEGETATION: The topsoil shall be set aside, and upon completion of an excavation, the topsoil shall be replaced and the site graded in conformance with the excavation permit (Development Title Section 9-1415.3[g]). The site shall be revegetated in accordance with the Reclamation Plan (Exhibit A) and the mitigation measures of the "Biological Resources, Impacts,and Mitigations Analysis"prepared by Monk&Associates. i. WEED CONTROL: If noxious weeds are on the site, operations shall be in accordance with instructions from the Agricultural Commissioner of San Joaquin County. (Development Title Se3ction 9-1415.3[h]) j. SETBACKS: No excavation shall take place within the setbacks as shown on the Excavation Plan dated May 4, 1999. k. TEMPORARY CUT SLOPES AT SETBACK LINES: The temporary cut slopes at the setback lines shall not exceed 1.5 horizontal to 1 vertical. I. SLOPES: Final slopes shall not exceed 1'/z horizontal to 1 vertical, provided a slope stability analysis is prepared which takes into account that the final fill slope is being placed over a cut slope and is based on site specific soil conditions. The slopes shall be periodically monitored, but no less than annually, and a report submitted to verify that the site specific soil conditions are consistent with the soil values used in the slope stability analysis. The minimum slope stability factors shall comply with the requirements of Development Title Section 9-1415.3(k)(4): (1) Terracing Required. All slopes over fifty (50)feet in height shall be terraced with a maximum vertical distance between terraces of fifty (50)feet. Each terrace or bench shall be a minimum of twelve(12)feet wide. (2) Terrace Drainage. Drainage plans with calculations shall be submitted for approval to Development Services Division for all terraces as part of the Reclamation Plan. Terraces for reclaimed final slopes shall be sloped back towards the fill and be designed such 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 the slope. The spacing of collection points shall be no greater than 1,500 feet,with each reclaimed final slope face that has terracing shall have a minimum of one(1)down drain. The method of transporting the water along the flow line of the terrace to the down drain, so as 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. m. EXCAVATION/RECLAMATION SCHEDULE: The reclamation plan shall show the phases of excavation. Reclamation on the phase of an excavation shall be initiated prior to the start of the next excavation phase. The final reclamation of any phase of excavation shall be completed within two years of the commencement of the reclamation process. Excavation shall be limited so that at any point of time a maximum of one phase is being reclaimed while one phase is being excavated. (Development Title Section 9-1415.3[o]) Conditions of Approval -2 - QX-99-1