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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 Operations Plan for the proposed composting operations — Section 3 — Method 3 - Enclosed aerated static pile Composting (CTI System): Incoming food waste material will be processed and loaded into composting bags within 48 hours of receipt. Processed materials may be combined with process liquid, which may be collected during initial composting phase, from existing filled composting bags. Once processed and mixed, materials will be loaded into composting bags within 48 hours; materials not bagged immediately after mixing may be tarped to minimize any potential odors. A forced -aeration system is installed in each composting bag and designed to supply uniform air flow to the full length of the bag, maximizing aerobic conditions during the composting process, thus minimizing odors. The composting material within each bag acts, to a significant degree, as its own biofilter. The composting operations occur on a concrete pad that is sloped to drain at a minimum of 1 %. The concrete pad is maintained as to not allow ponding that could initiate anaerobic conditions and possible odors. The pad has year round access where incoming and outgoing loads can be handled in a timely manner. During peak season, the total volume of material on-site will not exceed 56,000 cubic yards. Operations Plan for the proposed composting operations — Section 4 — Method 4 - Covered Aerated Static Pile Composting (GASP) System: Incoming food waste material will be processed and constructed into static piles within 48 hours of receipt. Incoming food materials are processed and will be mixed with green materials to assure proper pore space is available in the piles to allow efficient airflow and aerobic activity which reduces odor generation. Once constructed over the aeration system components, the CASP piles are covered and the aeration fans are employed. Partially constructed CASP piles may be covered and aeration utilized on an interim basis to minimize odors. The CASP system uses computer-based control technology. Compost pile temperature data is collected and stored on the computer and the individual batches of compost are easily tracked through the facility from start to finish. The piles are aerated and flow is automatically controlled per operator chosen set - points. The negatively -aerated system exhaust air is scrubbed in a properly -sized biofilter constructed of wood chips. Positively -aerated systems are also available which utilize a micropore fabric cover that has been shown to effectively prevent odors from release. The aeration rates for either system can be modified to conserve moisture and fan power, without releasing odors. Prior to removing the cover the aeration is increased to lower temperatures and raise oxygen levels; this greatly diminishes the potential for odor releases. 10