SU0004094 - Laserfiche WebLink

Home Browse Search

3. PROJECT DESCRIMON outside contractor,would be brought in intermittently into the middle of the plant site to produce — base. The office would consist of a series of pre-manufactured buildings. All plant and office facilities would be constructed in the Phase IX area and would be accessed via South Costa Ranch Road. There would be approximately 40 employees at the facility. The life of the — processing operation would continue parallel to mining operations. During the final phase of mining, Phase IX,the processing plant area would be mined and a portable processing plant would be set up in the Phase IV area, which by that time would be a capped silt pond. The — portable processing plant would remain in Phase IV for the final phase of mining operations. Truck scales would be located at the processing facility and a scale house/office building that — would be approximately 1,800 square feet in size would be located near the truck scales. A portable,concrete recycling plant,owned and operated by an outside vendor, would be brought in intermittently into the middle of the plant site(the Phase IX area)to produce base. Concrete comeback and waste concrete from the batch plant would be stockpiled for recycling. Approximately 100,000 tons of material per year would be recycled. An inert landfill may be included at the project site in the future. STATIONARY PLANT _ The stationary plant will produce between 1.7 and 4.0 million tons of aggregate per year, depending on market demand. Approximately 75 percent of the processing plant would involve a wet screening process. The wet plant would consist of scrubbers, crushers, coarse material washers, fine material washers,conveyors,and wet screens for the washing and sizing of materials. The other 25 percent of the material would be processed through a dry circuit that _ would consist of conveyors,crushers, and dry screens for the sizing of the crushed aggregates. Input from the processing facility would be approximately 1,400 tons per hour and output would be approximately 1,200 tons per hour(the 200 ton per hour difference would be due to the — generation of silts and clays by the processing plant operation). Wastewater from the plant washing process would be stored in settling ponds. Settled water from the settling ponds would be recycled for use in the plant washing circuit. POWER USAGE The power grid connection would be at the South Costa Ranch and Blewett Road intersection. The annual usage of the aggregate plant is projected to be approximately 14,700 megawatt hours. The concrete batch plant is projected to use approximately 415,000 kilowatt hours, and the asphalt plant is projected to use approximately 450,000 kilowatt hours. Natural gas would be used at the kiln for the asphalt plant at a volume of 500,000 deca-thetins per year. — WATER It is estimated that project operations would require approximatq1L 3,840,000 gallons of water per day (approximately 3,040 acre feet annually). The volume of water requir or du is suppression _ 2(� g'JI 00 RMC Pacific Vemalis Quarry Mining and Reclamation Project 3-22 PSA 1203015 Admmisuative Daft EIR Macey 2004