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3. PROJECT DESCRHMON ground surface, depending on the groundwater level. No mining would occur in the groundwater aquifer. In addition to the mining operation,the project would include a processing plant,a ready mix — concrete plant, an asphalt plant,recrushing/recycling of broken concrete and office facilities. The hours of operation for both excavation and processing would be 24 hours per day, six days per week(Monday through Saturday),with maintenance occurring on Sundays. A paved entrance to the plant and office site would be constructed off South Costa Ranch Road. A landscaping screen would be developed within a 50-foot setback along Blewett Road and the — northern portion of South Costa Ranch Road,from Blewett Road to the entrance of the mining facility,to screen operations from the roadways. The entire site would be enclosed with either existing or new fencing. Figure 3-3 and Figure 3-4 depict the locations,features, and phases of the proposed mining operation. 3.6.1 SITE PREPARATION AND CONSTRUCTION SITE CLEARING AND GRADING Mining would be initiated by first clearing and grubbing the project site of vegetation,trees, structures and debris. The trees and vegetation will be mulched by an outside contractor and used in the on-site landscaping. Excess mulch will be removed from the site. The house and bam located in Phase lI will be moved to Parcel"A,"moved off-site or demolished just prior to mining that phase. The other structures(mobile homes)will be removed from the site. General _ debris will be recycled or removed from the site using roll-off debris containers. Scrapers and dozers will remove approximately 800,000 cubic yards of topsoil during each phase _ and stockpile it along the perimeter setbacks. The topsoil will be used in reclamation. Scrapers and dozers will strip the overburden, using it for the construction of building pads for the structures and for screening/landscape bemrs. The majority of the overburden will be stockpiled and used in reclamation. Other equipment used for clearing the site would be a water truck, grader and loader. SILT POND CONSTRUCTION While mining Phase I,the Phase IVB area would be bermed to create a temporary silt pond using Phase I and Phase IVB overburden. Once mining is completed in Phase I, it would be used for permanent silt containment and the silt temporarily contained in the Phase IVB area would be pumped into the Phase I silt pond. Once Phase IVB and Phase IVA are mined out,those pits will also become permanent silt ponds. If additional silt storage is needed during the course of mining,the Phase V area would be used as a silt pond. Figures 3-3 and 3-4 show the location of the temporary silt ponds. RMC Pack Ventalis Quarry Mining and Reclamatton Project 3-8 ESA/103015 Admid,tctove Draft E1R Match 2004