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be sized to contain 200 percent of the computed volume of runoff from the 10 -year, 24-hour storm. The pond shall also be designed to empty by percolation and evaporation 100 percent of the required volume of storage within 10 days. Storm Water Runoff - Wood Storage and Yard Waste Compost Area Storm water runoff from the Wood Storage and Yard Waste Compost Area will drain to an on-site lined evaporation pond. This pond will have a single clay liner meeting permeability of 1 X 10-6 cm per sec. or less and will be sized for the 100 -year, 24-hour storm. Building Wash Down Water Water used for periodic wash down of the MRF/Transfer Station floor will be collected and directed to holding tanks for temporary storage. Holding tank(s) will most likely be located outside the building on the east side in the paved area for easy access. Water will periodically be pumped out and hauled to local POTW for disposal. Testing will be done to ensure compliance with any POTW pre-treatment standards prior to disposal. Truck Wash Down Water Water from the truck wash areas will be collected and discharged to a two- or three -stage sand and grease separator. Discharge from the separator will be directed to the on-site sewage disposal system that will consist of a septic tank and leach field designed and constructed in accordance with County of San Joaquin Public Health Services (Environmental Health Division) standards. Water and sanitary sewage disposal will be provided by on-site systems. Electricity and natural gas will be provided by PG&E, and telephone service will be provided by Pacific Bell. The site will be enclosed with a six -foot -high chain-link fence and landscaped along MacArthur Drive, the gatehouse, and along the eastern side of the parking lot at the office/maintenance building. All disturbed slopes will also be reseeded with natural grasses. The facility will be open up to seven days a week, between the hours of 4:00 a.m. and 6:00 p.m., and will employ approximately 20 people. The facility will be open up to seven days a week to the public for self - haul delivery of refuse between the hours of 6:00 a.m. and 4:00 p.m. The TMRF will include the following specific components: Sorting of nonhazardous solid waste and/or collected recyclables. 2. Transfer station for the transport of the residual waste to landfills. 3. Processing of the recyclables from sorting and curbside collection programs. 4. Yard waste processing and composting. 5. Wood waste storage and processing for off-site use. 6. Administration and maintenance areas for both the TMRF and collection operations. ER -93-1 - 12 - (9-27-93) j