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Process water will be supplied from an on-site groundwater well, the storm water retention <br /> basin, and/or the evaporation pond. The delivery system will include piping, faucets, industrial- <br /> size hoses, nozzles and emitter systems for the tub grinder and windrow turner. Most of the <br /> water required will be applied when the material is ground and the windrows are constructed. <br /> Less water will be required to keep the existing windrows moist, however, the outer 6" - 12" <br /> of the windrows will dry out during hot, dry and windy conditions. <br /> Leachate and storm water runoff from the compost pad will be collected in the evaporation pond. <br /> Leachate will be reused as process water or evaporated. <br /> C. Preprocessing Procedures <br /> Only source separated yard and wood waste material will be used as feedstock. All feedstocks <br /> will be subject to inquiry, inspected, analyzed and possibly tested for heavy metals prior to <br /> processing. Wood wastes will be inspected prior to processing. Painted and treated lumber will <br /> not be processed. Ground wood waste will be screened for metal contaminants prior to <br /> composting. <br /> d. Process Time <br /> It is estimated that the average processing time to produce finished compost will be 20 weeks. <br /> Approximately 12 weeks are required for the rapid decomposition phase and 8 weeks for the <br /> curing phase. <br /> The rapid decomposition phase of the composting process will take approximately 12 weeks. <br /> During this time the windrows will be closely managed and aerated to maintain optimum <br /> decomposition rates. During this time windrow temperatures oisture content, <br /> Ph, changes in material size, color and aroma will be monitored to ensure satisfactory progress <br /> towards stabilization. A gradual decline in temperatures indicates that the rapid decomposition <br /> phase of the composting process has been completed and the material is stabilizing. <br /> The curing phase of the composting process will take approximately 8 weeks. Temperatures will <br /> decline (125° F - ambient) and decomposition rates will slow down over several weeks. <br /> Characteristics of stabilized compost will be a dark uniform brown color, near ambient <br /> temperatures, earthy aroma, and volume reductions of 50 - 75 percent. <br /> It is estimated that an average of 7 cubic yards of finished compost would be shipped out of the <br /> facility on a daily basis. This assumes that 50 percent of the organic wastes would be <br /> L:1PROJECrt397/1.W/RC1-4.TCY December 15, 1993 <br />