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2-5 <br />Forward Composting Facility SWT Engineering <br /> Report of Composting Site Information - January 2022 <br /> <br />base for curing. In curing, a slower rate of decomposition occurs. A curing time of <br />approximately 1 to 6 months is needed. An even longer curing period is desirable for <br />production of a higher quality compost. The curing period will depend on the quality desir ed <br />and this in turn will depend on the market or final use of the product. Therefore, t he <br />capacity of final compost output decreases significantly to produce a higher quality compost <br />product. After curing, the material may be screened. Screening produces a higher quality <br />material, but at additional cost. Oversized material from screening may be returned for <br />grinding, recycled to be used in the compost mixture or landfilled. <br />ASP Composting using Positive Aeration. Figure 4 shows the layout for the ASP com posting <br />using positive aeration. A loader will be used to create the compost heaps, and a loader is <br />used to move material from one aerated compost heap (active) to another aerated compost <br />heap (curing). The compost heap dimensions are up to 30 feet wide, up to 110 feet in <br />length, and up to 10 feet high. There are three ASP zones comprised of up to 7 compost <br />heaps, and one zone comprised of up to 4 compost heaps. Adequate space between ASP <br />zones is maintained for fire control. ASP composting using positive a eration is also <br />discussed in Section 1.3.1. <br />Alternative Processing. The windrow turning/processing and ASP system discussed above <br />has been determined to be at optimum. In the event of equipment breakdown, Republic will <br />replace/rent a windrow turner. If t his equipment is not available, front end loaders will be <br />used to turn the windrows. <br />Compost Quality. The decision on what quality of compost to produce will depend on the <br />available feedstocks, potential markets for compost , and the overall economics of th e <br />composting process. Potential uses/markets for the compost are as follows: <br />⧫ Bulk agricultural use; <br />⧫ Wholesale to topsoil manufacturers ; <br />⧫ Turf farm; <br />⧫ Farm land reclamation; <br />⧫ Wholesale to landscape industry; and <br />⧫ Retail to individuals. <br />2.1.3 Facility Construction <br />The operation of the Compost F acility will be coordinated with operation of the existing RRF <br />and landfill facilities. Unloading of materials requiring processing (i.e., material screening <br />and/or grinding) will be done west of the RRF building, as shown in Figure 2. Handling of <br />wood waste, green material, and agricultural wastes will be similar to the existing wood <br />waste handling procedures. <br />The existing conditions plan, legal property limits, and topography are shown in Figure 2. <br />Except for some setbacks, internal roads, the South Fork easement, and County of San <br />Joaquin right of way for Austin Road, virtually the entire South Area is developed for <br />composting (including some of the area now occupied by the RRF). The easement and right <br />of way are shown in Figure 2. A detailed Site Plan, including the unloading, storage, <br />processing, parking and loading areas, and ancillary facilities, is shown on Figure 2.