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Project Description — Report of Composting Site Information <br /> Tracy Material Recovery Facility and Transfer Station <br /> 30703 5. MacArthur Drive, Tracy, California 95377 <br /> ✓ Technology Application Section 1 <br /> Windrow, elongated (excluding food waste) <br /> The aerated elongated windrow method of composting is currently performed at the <br /> ` Tracy MRF & TS. The feedstock materials include source—separated green material <br /> from municipal programs, yard trimmings, agricultural materials, additives, and <br /> amendments. Compostable materials, pre and post-consumer food material, and green <br /> material composted in the enclosed aerated static pile method in the CTI Bags will be <br /> further composted and cured in an elongated windrow method to finish the compost. <br /> b. A descriptive statement of the operations conducted at the facility. <br /> The-Tracy MRF & TS operates an elongated windrow composting system. Operations <br /> at the facility are summarized as follows: <br /> • The green materials delivered to the compost facility will be directed to the receiving <br /> area. The compost facility personnel will conduct a load check upon deposition. <br /> Contaminated and uncompostable materials will either be returned to the hauler or <br /> placed in a bin located near the receiving area. <br /> • The material is formed into trapezoidal-shaped windrows. Windrows are <br /> approximately 14 feet wide, 7 feet high, and a length that varies according to pad <br /> size. Windrows are separated by a minimum 4-foot wide access road for windrow <br /> loading, monitoring, watering, and turning. <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. A windrow turner, or a front-end loader as back up, will be <br /> f used to turn the windrows. Windrows will be turned to meet the time and <br /> temperature requirements as discussed below, wind permitting, for an anticipated <br /> period of twelve to twenty weeks; <br /> • Water is added as necessary to the compost piles to maintain the appropriate <br /> composting moisture and dust control conditions. A piped irrigation system is used to <br /> add water to the windrows. The frequency of irrigation will vary with the season. A <br /> water truck is also used to mitigate dust generation. <br /> • Pathogen Reduction for Windrow Composting: The process of turning windrows <br /> provides sufficient oxygen to sustain the biological activity and keep the material at a <br /> temperature of 55 degrees Celsius (131 degrees Fahrenheit), or higher, for a period <br /> of 15 days, or longer, which ensures thorough pathogen destruction. There will be a <br /> minimum of 5 turnings of the windrow during a 15-day period during which readings <br /> such as temperature and moisture content are monitored and documented. <br /> 32 <br /> Edgar&Associates,Inc. Tracy Compost Fac ProjDesc042310 <br />