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Report of Composting Site Information <br /> Tracy Material Recovery Facility and Transfer Station <br /> 30703 S. MacArthur Drive, Tracy, Ca. 95377 <br /> • Depths at which the temperatures will be taken as discussed <br /> above. <br /> • The same person taking the temperatures using the same <br /> technique each time will be utilized whenever possible to aid in <br /> eliminating variables. <br /> • Points for probe insertion shall be chosen to produce the most <br /> representative readings of internal temperatures. <br /> The total time feedstock remains at the facility using the elongated windrow method is <br /> approximately 13 weeks. After the compost process, the material will be cured an <br /> average of 30 days. The finished product will be stored on-site until the product is <br /> shipped off to market. <br /> Compressed Windrow Method <br /> Compressed windrows are managed in essentially the same way as the elongated <br /> windrow method with respect to monitoring, tracking, and pathogen reduction. <br /> However, there are a few differences related to the geometry of the pile. <br /> • The material is formed into trapezoidal-shaped windrows. Windrows are <br /> approximately 60 feet wide, 15 feet high, and have varying length. Windrows are <br /> separated by a minimum 12-foot wide access road for windrow loading, monitoring, <br /> watering, and turning. <br /> qV • Compressed windrow composting operates in a `plug-flow' manner where the <br /> material is introduced to the windrow and then removed from the compost process <br /> with a retention time of 13 weeks for composting, and approximately 30 days for <br /> curing. Front-end loaders will re-stack the compost approximately 15 feet laterally <br /> from its original position. In this way composting material migrates from one end of <br /> the windrow to the other in a wave like motion; during this cycle, organic material is <br /> exposed to the inner-core with temperatures ranging between 54 to 60° Celsius, well <br /> within the range for pathogen reduction. Turning of this windrow will follow the 15- <br /> day, five turning method for elongated windrows. The timing of the turning of the <br /> material in the compressed windrow during this initial 15 days and beyond will be <br /> coordinated with the temperature measurements. <br /> Covered Aerated Static Pile (ASP) <br /> Covered ASP systems are designed as a cost-effective system for controlling potential <br /> environmental impacts (including storm water contamination and odors) and maintaining <br /> optimal pile conditions during composting. It combines either a waterproof, synthetic <br /> fabric cover, or a cover consisting of finished compost and/or compost overs, with a <br /> computerized aeration control technology to optimize composting conditions for all types <br /> of feedstocks. Additional information is provided in Appendix D regarding this covered <br /> ASP system. <br /> The covered ASP system uses computer-based control technology. Compost pile <br /> temperature data is collected and stored on the computer and the individual batches of <br /> compost are easily tracked through the facility from start to finish. Air flow is <br /> 13 <br />