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Report of Composting Site Information <br /> Tracy Material Recovery Facility and Transfer Station <br /> 30703 S. MacAurthur Drive, Tracy, Ca. 95377 <br /> An alternative to the at-grade aeration system is an aeration floor, where the aeration <br /> system is built into a concrete slab upon which the compost feedstock is placed. <br /> Although capital costs are higher for in-floor aeration systems, durability is high and <br /> collection of liquids is facilitated. An image of an aeration floor system is shown in <br /> Appendix D. The aeration floor can be operated with either positive or negative aeration. <br /> Elongated Aerated Static Pile <br /> • Incoming trucks will be received and weighed at the scale located near the entrance <br /> to the facility. The scale personnel will direct haulers to the composting facility after a <br /> cursory load check. Appropriate signage in conformance with the requirements of <br /> 14 CCR §17867(a)(7) will be placed within the composting facility. <br /> • The source separated green materials delivered to the compost facility will be <br /> directed to the receiving area. The compost facility personnel will typically conduct a <br /> load check upon deposition. Contaminated and non-compostable materials will <br /> either be returned to the hauler or placed in a bin located near the receiving area. <br /> • The green waste, green material and food waste will be processed in a grinder in the <br /> processing area and deposited directly into the static piles. A front-end loader will be <br /> used to feed the material into the grinder. Some material may arrive at the facility <br /> already pre-blended and ground. The ground material will be formed into elongated <br /> piles over a computer controlled aeration system for on-site composting as shown <br /> on the Site Plan. <br /> • The material is formed into trapezoidal-shaped piles of approximately 30 feet wide, <br /> 15 feet high, and 70 feet in length. Piles are separated by an access road for <br /> loading, monitoring, watering, moving, and turning. The pile layout for the operations <br /> is generally west to east as illustrated in Site Plan. <br /> • The identity of each ASP is designated by an identification number in the control <br /> system and on the operations diagram. All information pertaining to each pile will be <br /> calculated and stored in the computerized control system (and documented in site <br /> records) which will allow instant identification of pile status (e.g. start date, <br /> temperature readings and historical profile, air flow, and sampling) and allow site <br /> personnel to isolate material waiting testing results. <br /> • The temperature and moisture of the ASP materials will be monitored and controlled, <br /> and the piles turned on a 15-day cycle so that the composting process is maintained <br /> and evenly distributed to all materials. A front-end loader or compost turner will be <br /> used to move the ASPs, and ASPs will be maintained to meet the time and <br /> temperature requirements. <br /> • Water will be added as necessary to the ASPs to maintain the appropriate <br /> composting moisture. Water will be sprayed under the weatherproof covers, or prior <br /> to placing the compost cover layer, as needed to maintain optimum composting <br /> conditions. The frequency of spray irrigation will vary with the season and moisture <br /> 15 <br />