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Odor Impact Minimization Plan—Compost Facility Tracy Material Recovery Facility and Transfer Station 30703 S. MacArthur Drive, Tracy, California 95377 Section 17863.4 (b) (4) - Design Considerations and Procedures to Minimize Odors. Facility Siting: The siting of the green material composting operations in remote rural San Joaquin County, away from many sensitive receptors and in a closed gravel quarry that is 30 to 40 feet below grade, meets the optimal siting criteria to reduce the potential for odor complaints. Proper Drainage: Standing water is a potential source of odors. The pad is paved asphalt-concrete and is sloped to drain at a minimum of 1%. The pad is maintained to prevent ponding. On-site drainage is controlled by use of drainage ditches surrounding the perimeter of the facility and directing all surface water flow toward the storm water retention basin adjacent to the compost pad, which is maintained to prevent sedimentation and organic loading that could potentially cause odors. Feedstock characteristics: Feedstocks are managed to minimize odors utilizing the following procedures during the composting process: • Load Check Program The workers at the compost facility are trained to screen incoming vehicles for presence of unacceptable wastes. All loads will be checked prior to loading the material into the processing equipment or windrows. Unacceptable material that does not pose an immediate threat to public health and safety and the environment will be collected at the composting facility and segregated, handled, and disposed of by trained personnel in accordance with applicable law and regulation. Debris boxes shall be maintained at all times for placement of unacceptable materials. These debris boxes shall be removed for legal offsite disposal at a permitted landfill and replaced within 7 days of initial placement. The composting facility personnel training programs will include instruction in methods to observe incoming loads and to check for the receipt of unacceptable materials. The key employees include the scale personnel, composting facility load check personnel, equipment operators, and the site manager. • storage limitation to no more than 7 days for green waste and 48 hours for food waste feedstocks • proper handling/blending to maintain proper carbon/nitrogen ratios to reduce ammonia levels; maintenance of turning schedule—by use of a compost turner—will maintain aerobic conditions 12