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Proposed Odor Impact Minimization Plan — Compost Facility Tracy Material Recovery Facility and Transfer Station 30703 S. MacArthur Drive, Tracy, California 95377 resistance on the wheels or backstop cable 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. CASP System Operational practices are also key contributors to effective odor control for the covered aerated static pile composting. Thorough inspections of incoming loads coupled with prompt blending of yard and organic wastes, plus rapid movement of feedstock from the feedstock processing/mixing area into the covered piles are all essential operating steps. Under normal operations, wastes will be processed into covered piles within 48 hours of receipt. The CASP system, like the bagged system, relies on forced aeration to facilitate aerobic conditions and minimize odor generation. Processed feedstocks are constructed into piles over an aeration floor or an inflatable/collapsible form that creates an aeration vault. The CASP piles are covered with a synthetic cover that controls the dissipation of moisture and odors once the aeration systems are employed. Materials are rotated through three cycles, of approximately two weeks each, where the piles are turned to maximize exposure to aerobic activity and the high temperatures which kill pathogens. Biofilters are also constructed and properly sized and maintained for the processing of exhaust air in the negatively -aerated CASP systems. The biofilters are highly effective in the removal of odors, volatile organic compounds, and greenhouse gasses from the exhaust air; they are constructed with irrigation systems to maintain proper moisture levels and monitored regularly to assure the filter media is replaced in a timely manner. Bioaerosols: The primary feedstock for the compost process is green waste. Potential adverse health effects associated with airborne fungal spores, specifically Aspergillus fumigatus and or Aspergillus flavus, have raised concerns 16