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Project Description- Report of Composting Site Information Tracy Materia/Recovery Faality and Transfer Station 30703 S. Mac4rthur Drive, Tracy, California 95377 aerobic decomposition. The entire composting process will take place inside of the elongated thermoplastic bag. The bags are 12 feet in diameter and approximately 185 feet in length and can contain up to 350 tons of feedstock. The bagger is fed from a truck or loader onto a feed table, conveyor or into a hopper, which feeds material to the compaction unit on the bagger. Compactionpressure is controlled adjusting the breaking resistance on the wheels or backstopcable drum depending on the model being used. The bagged composting system relies on forced aeration of each fully enclosed bag to prevent development of anaerobic conditions and associated odor problems. Aeration pipes are inserted into the full length of each bag. Each bag is connected to two blower units that are controlled by an automatic timer, set manually as conditions dictate. The composting material within each bag acts to a significant degree as its own bio-filter, contributing further to effective odor control. • Installing the aeration system Perforated pipe will be installed into the compost bags by feeding the pipe into the bags as filling takes place. Smooth plastic PVC pipe is threaded from the front of the bagging machine through a guide pipe exiting at the desired height and separation inside the tunnel and then through the plastic bag to the blower. The pipe diameter and the perforations will be designed to supply a uniform airflow to the full length of the bag. A blower for each bag will deliver the required air to the matrix during the composting cycle and is controlled by a manually set timer, Figure One. • Setting the controls The controller will be set to cycle the blower on and off intermittently during the day so that the compost matrix receives a sufficient amount of air. When material is first placed in a bag, the oxygen level is sufficient to promote aerobic microbe growth for several hours or more. When the initial oxygen supply has been used up, the blower is used to force a new supply of oxygen into the matrix. In the CTI SystemTM, microbe growth and the resulting temperature is controlled by limiting the amount of oxygen available. Temperatures are taken at 6" and 12" depths. if temperatures are not above 131 degree Fahrenheit, the airflow will be adjusted to introduce more oxygen, and thus raise the temperatures. Verification of the pathogen reduction process is performed through salmonella and fecal coliform testing. t 39 Edgar&Associates,Inc. Tracy Compost Fac ProjDesc042310