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1 Process water will be supplied from an on-site groundwater well, the storm water retention basin, and/or the evaporation gond. The delivery system will include piping, faucets, industrial -size hoses, nozzles, and emitter systems for the tub grinder and windrow turner. Most of the water required will be applied when the material is ground and the windrows are constructed. Less water will be required to keep the existing windrows moist; however, the outer 6" - 12° of the windrows will dry out during hot, dry, and windy conditions. Leachate and storm water runoff from the compost pad will be collected in the evaporation pond. Leachate will be reused as process water or evaporated. Only source -separated yard and wood waste material will be used as feedstock. All feedstocks will be subject to inquiry, inspected, analyzed, and possibly tested for heavy metals prior to processing. Wood wastes will be inspected prior to processing. Painted and treated lumber will not be processed. Ground wood waste will be screened for metal contaminants prior to composting. It is estimated that the average processing time to produce finished compost will be 20 weeks. Approximately 12 weeks are required for the rapid decomposition phase and 8 weeks for the curing phase. The rapid decomposition phase of the composting process will take approximately 12 weeks. During this time, the windrows will be closely managed and aerated to maintain optimum decomposition rates. During this time, windrow temperatures (1250 - 160° F.), moisture content, Ph, changes in material size, color, and aroma will be monitored to ensure satisfactory progress towards stabilization. A gradual decline in temperatures from 125° F. to ambient temperatures indicates that the rapid decomposition phase of the composting process has been completed and the material is stabilizing. The curing phase of the composting process will take approximately 8 weeks. Temperatures will decline 125° F - ambient) 'and decomposition rates will slow down over several weeks. Characteristics of stabilized compost will be a dark uniform brown color, near ambient temperatures, earthy aroma, and volume reductions of 50 - 75 percent. It is estimated that an average of 7 cubic yards of finished compost would be shipped out of the facility on a daily basis. This assumes that 50 percent of the organic wastes would be composted, size -reduction of green waste of 5:1 and wood waste of 10:1, and volume reduction in the windrows of 50 percent. Normal operating procedures will not include the use of chemical additives or bulking agents to finish the composting process. Such additives or amendments would be custom blended upon customer request. Under no circumstances would septage, sewage sludge, or mixed solid waste be used. Climatic conditions can affect the comoostina operations. Heavv rains can saturate piles of organic matter and the composting windrows. Saturated conditions can create anaerobic conditions and odors. The existence of a concrete composting pad will ensure all-weather equipment operation so that aerobic conditions can be maintained. Materials susceptible to anaerobic conditions such as green grass cuttings or animal manures will be given priority handling or covered pending inclement weather. Hot. dry winds will dry out the outer portions of the windrows and slow the decomposition rate. Additional water applications will be made during these conditions. 5 ER -93-1 - 16 - (9-27-93)