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w fi Development Committee -2- GEOTECHNICAL The proposal is to excavate to an elevation of 85 feet. Preliminary information indicates that the water table is approximately at an elevation of 75 feet. At the conclusion of ; the excavation, five (5) feet of top soil will be added to the pit floor to bring it up to a finished elevation of approximately 90. From the contours submitted on Sheet 4 of 5 of the plans the property slopes down in a north easterly direction. The depth of the excavation will be approximately 125 feet. Because of the depth of the cut, the proximity to the Delta Mendota Canal and the California Aqueduct will need to be addressed. From the typical section shown on Sheet 5 of 5, Section CC indicates that the working slopes will be excavated to a slope 3/4-1. Final slopes will then be backfilled against this working slope to create a final slope of 1 1/2-1 with 20 foot benches. To construct a fill slope against a cut slope is a difficult process and will need to be substantiated with soil testing, w slope stability analysis, and special inspections. ENVIRONMENTAL REVIEW The Initial Study identified several potentially significant impacts that this project may have upon the environment. In summary, these impacts include the following: geotechnical and slope stability, biological resources, air quality, noise, traffic, culture resources, visual cumulative impacts, and site reclamation. Enclosed is the Initial Study, which incudes a more detailed description of each of the potentially significant impacts noted. Based upon this, staff has concluded that it will be necessary to have an Environmental Impact Report (EIR) prepared for this project. In order to proceed with the preparation of the EIR on your Quarry Excavation application, an initial fee of $2 , 375. 00 is required in order to prepare the Notice of Preparation (NOP) . This amount is then credited toward the price of the ETR total. You will also be responsible for the costs of preparing and administering the EIR. If you wish to have a particular consulting firm included on the Request for Proposal distribution list, please have them submit their qualifications material to the Planning Division as soon as possible. Once the consultant is selected by the County, you will be required to submit a second fee to cover the cost of the EIR preparation, as well as a 25. 5 percent administrative fee. Once that is accomplished, the County will enter into an EIR Agreement with the consultant, and preparation of the EIR will begin.