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As the materials in the active compost age, the volume of the compost decreases. Win- drows will be combined with neighboring Windrows to maintain the desired pile dimensions. The final materialwill be screened according to market specifications. Screened material will be stockpiled on the site prior to loadout to markets or for on-site uses. Oversized materials (overs) from the screening process will be reground, sold, or landfilled. b. Quench or Process Water Describe the anticipated volume of quench or process water required and planned method of treatment and disposal of any wastewater [14 CCR 18220a)J. Describe the facilities water supply and irrigation system that will be used at the compost piles, vessels, grinders, mixers, etc. The water collected in the runoff retention pond will be used as process water to meet the desired moisture contents for composting. Water from the retention pond will be applied to the waste as it leaves the tub grinder. A fixed nozzle will spray the water on ground waste at the discharge of the conveyor from the tub grinder. This process will eliminate the potential for pathogen regrowth in the active compost. The nozzle will not require contact with a human operator. A pump system will be required to move water from the retention pond to the tub grinder area. An automatic valve will be provided to allow the tub grinder operator to stop applying water at any time. The rate of application of water will be determined to provide the desired final mixture moisture content. It is anticipated that the retention pond will provide adequate process water supply.. How- ever, if necessary, process water may be obtained from other on site sources. Water for site operations is supplied by two on site production wells: a 1,000-gpm well near the landfill entrance facilities and a 20-gpm well near the RRF building. The RRF has an 8,000-gallon water tank located near the wood pile. Water uses include site construction and waste disposal operations, RRF operations, dust control, equipment maintenance opera- tions, sanitary facilities, fire fighting, and emergency situations. c. Preprocessing Procedures Describe any preprocessing procedures (bioreactors, etc.) used to lower avail- ability of heavy metals in compost. Preprocessing will include inspecting the incoming material to remove any visible contami- nants. Loads will be visually inspected at the RRF and will be manually sorted once they are dumped at the receiving and processing area. A magnetic separator will be provided to extract nails and other ferrous contaminants from the green waste material after it has been wa10029B5C.wp5/62 9/29/94 62