SU0005187 - Laserfiche WebLink

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Analysis Background The proposed quarry site has been an almond orchard for approximately 28 years. Trees were removed due to age and less than average production in 2004. The site is currently vacant pending permit approval. The site is adjacent to an existing quarry operation(QX-89-0002)consisting of land previously excavated and reclaimed back to agriculture, an existing processing facility used for processing sand and gravel, an asphalt plant, and a recycling plant. Approximately 12 acres have been reclaimed. These areas have been planted with walnut trees. Reclamation for the processing area will not be completed until termination of operations. The approval for the existing operation was for a 20-year period. On March 4, 1999, the Planning Commission approved a Revision of Approved Actions for QX-89-02. The Revision added 30 years to the life of the permit. This permit request will enable the applicant to supplement and combine aggregates from this site with materials from other sources and to utilize the existing adjacent processing plant Excavation The exca atia, ^f the s,a v.;ll be by open pit method and will begin along the western property line of the project and progress easterly. Information submitted to the Community Development Department indicates a maximum excavation depth of 20 ±feet below grade. The excavation will not reach groundwater depth of 75 ± feet below grade. There will be one phase. Reclamation is proposed to be continuous and concurrent with mining. The site will be approximately 5 to 8 feet lower than the current elevation when reclamation is complete. Department of Conservation (Office of Mine Reclamation► The Office of Mine and Reclamation (OMR) has reviewed the proposed Reclamation Plan. In the memo dated August 11, 2005, OMR provided a list of supplemental information that needed to be provided in order to meet the minimum state requirements of the Surface and Mining and Reclamation Act(SMARA). The applicant submitted a revised Reclamation Plan, including the supplemental information, on August 12, 2005 that satisfied OMR requirements. Noise Development Title Section 9-1025.9 requires that residential use types have an outdoor activity area with maximum allowable noise exposure of 65 db Ldn or less. Maximum exposure to stationary noise sources of 70 db Lmax or less in the daytime (7:00 a.m. to 10:00 p.m.) and 65 db Lmax in the nighttime (10:00 p.m. to 7:00 a.m.). The closest residence is approximately 900 feet from the 11.4-acre site. The Community Development Department required that an analysis be performed to evaluate whether residences in the vicinity of the proposed quarry site would be exposed to noise levels from quarry equipment that would exceed the levels permitted in the San Joaquin County Development Title. Deem Shiningtree Environmental Services (Deem) has analyzed historical information on the equipment (scraper) that will be used at the time. Based on the information submitted to the Community Development Department by Deem, the noise levels would fall under these guidelines. Additionally, the quarry will be restricted to the hours of operation between 5:00 a.m. and 9:00 p.m., pursuant to Development Title Section 9-1415.3(f). Traffic All material excavated will be hauled to the processing facility using on-site haul roads. No public roads will be used to haul materials to the plant. Public Works has reviewed the proposal and has determined that no additional mitigation measures are required. San Joaquin County PA-0500403/Aggregates, Inc. Community Development Page 3