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Report of Composting Site Information Tracy Material Recovery Facility and Transfer Station 30703 S. MacAufthur Drive, Tracy, Ca. 95377 For the elongated aerated static pile, the material is formed into trapezoidal-shaped piles of approximately 30 feet wide, 15 feet high, and 70 feet in length. Piles are separated by a narrow access area to facilitate loading, monitoring, watering, moving, and turning. Elongated piles may also be formed within concrete-walled bunkers of similar size for easier materials management. • Extended Aerated Pile To make more effective use of available space, another pile configuration has been developed called the extended aerated pile. Studies indicate that the area required for an extended pile is about 50% less than that for an elongated static pile. Extended piles consist of individual cells that are stacked against each other. Cells of new feedstock are constructed in one pile, and cells of nearing mature compost are placed in other piles. Extended aerated static piles also increase the emissions control achieved with a layer of finished compost as the adjacent cells of feedstock support the finished cover layer of the adjoining cell, minimizing sloughing of the compost layer. Cover Systems The synthetic ASP cover is designed with straps for handling and securing it and may be placed and removed manually or with mechanized cover-rollers. The cover may be held in place by the aeration system which operates with negative suction that holds it firm against the pile or, in the case of positive aeration, use of perimeter weight at the base of each ASP. The impermeable cover over the ASP eliminates rain percolating through the pile and therefore reduces the total nutrient load found in the facility run-off. Proper grading of the site is maintained to limit intrusion of storm water around the "sealed" edge of the cover. Alternatively, a layer of finished compost or compost overs with a minimum thickness of 6 inches can be used to minimize storm water infiltration due to its absorptive capacity, and reduce air emissions by oxidizing gaseous compounds. The compost cover layer is incorporated into the feedstock when the pile is turned. With either a compost cover or an impermeable plastic cover, the system could potentially be operated under either negative or positive pressure depending upon the type of synthetic cover technology or which phase of composting (active or curing) a particular batch is undergoing. At-Grade Air Delivery System Combining the ASP System and CompDogTm at-grade aeration floor system is a cost effective way to deliver oxygen to the static piles. The CompDogTM uses an inflatable form to create aeration vaults under an ASP pile. The ASP pile is built on top of the CompDogTm and is allowed to settle overnight. In the morning the CompDogTM is removed and leaves behind an aeration vault used for air distribution through the biomass. The CompDogTM system includes a CompDogTm Roller, and Inflation and Deflation mechanism, allowing it to be removed leaving a tunnel like space for air flow. The inflated CompDogTM is shown in Appendix D (see also http://www.compostsystems.com/ . Aeration Floor System 14