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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 /> Digestate from anaerobic digestion facilities — that has already undergone several days <br /> of in-vessel composting prior to delivery to the facility — may be composted in windrows <br /> if it does not create odor problems. If the already composted digestate is malodorous <br /> then it will be placed in the aerated static pile system. Anaerobic digestion digestate <br /> that has not undergone in-vessel composting prior to delivery will be placed in the <br /> aerated static pile system. <br /> Composting Process Overview <br /> An overview of the various composting processes is presented below: <br /> Elongated Windrow Method <br /> • Incoming trucks will be received and weighed at the scale located at the facility. <br /> Scale personnel will also direct haulers to the composting facility after a cursory load <br /> check. Appropriate signage in conformance with the requirements of 14 CCR <br /> §17867(a)(7) will be placed within the composting facility. <br /> • The source-separated green materials and co-collected organics delivered to the <br /> compost facility will be directed to the receiving area. The compost facility personnel <br /> will typically conduct a load check upon deposition. Contaminated and non- <br /> compostable materials will either be returned to the hauler or placed in a bin located <br /> near the receiving area. <br /> • Some material may arrive already processed, but if not, the material will be <br /> processed in a grinder in the Processing Area and deposited directly into the <br /> windrows. A front-end loader will be used to feed the material into the grinder. The <br /> ground material will be formed into elongated windrows for on-site composting. <br /> • The material is formed into trapezoidal-shaped windrows. Windrow dimensions will <br /> depend on the type of windrow turner used, but are typically up to 20 feet wide, 8 <br /> feet high, and have varying length. Windrows are separated by an access road for <br /> windrow loading, monitoring, watering, and turning. <br /> • At each composting location, the identity of each windrow is designated by an <br /> identification number on the site composting schematic. All information pertaining to <br /> each pile will be documented in site records, allowing identification of pile status <br /> (e.g. start date, temperature readings, turnings, and sampling) and allowing site <br /> personnel to isolate material awaiting testing results. The numbers assigned for <br /> each pile will be unique and will not be repetitive. <br /> • The temperature and moisture of the windrow materials will be monitored and <br /> controlled, and the windrows turned on a regular basis so that the composting <br /> process is maintained. New materials will subsequently be added to the newest side <br /> to lengthen the windrow. A front-end loader and/or a windrow turner will be used to <br /> turn the windrows. Windrows will be turned to meet the time and temperature <br /> requirements as discussed below, wind permitting, for an anticipated period of ten to <br /> fourteen weeks. <br /> 11 <br />