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Proposed Odor Impact Minimization Plan — Compost Facility <br />Tracy Material Recovery Facility and Transfer Station <br />30703 S. MacArthur Drive, Tracy, California 95377 <br />Section 17863.4 (b) (1) - Odor Monitoring Protocol <br />Properly managed green material stockpiles should not create nuisance odors. <br />Improper management of raw feedstock piles, organic stockpiles, and processed <br />green material may cause nuisance odors. The compost operator and the <br />community must be willing to work together to monitor, evaluate, and allow time <br />to make changes should nuisance odors be emitted and an odor complaint be <br />received. The best way to ensure that all parties work together is to implement an <br />odor impact minimization plan that is agreed upon between the operator and the <br />LEA. <br />The closest receptors will be operations staff and management who will be onsite <br />during operating hours to monitor the compost materials handling operation. The <br />operation is sited in rural San Joaquin County away from most sensitive <br />receptors. The California Integrated Waste Management Board has identified <br />1,000 feet as the distance required for identification of receptors. <br />Possible receptors are: 1) the Lone Star Industries gravel mining operations on <br />the parcel adjacent to the west; 2) Teichert Aggregates operation of a sand and <br />gravel mining facility to the north; and 3) two residences (mobile homes) located <br />approximately 600 feet north of the site on the east side of MacArthur Drive. <br />There is also one residence approximately 1.4 miles south of the site on the west <br />side of MacArthur Drive. The closest residential subdivision is approximately one <br />mile north of the site along MacArthur Drive. <br />Our analysis of prevailing wind conditions for the site indicates wind is <br />predominantly from the west, which could impact the two residences northeast of <br />the facility. However, the compost facility is located 30-40 feet below grade <br />because it is sited within a depression from a closed gravel quarry. This tends to <br />mitigate the transfer of odors to surrounding properties. <br />Each day the Operator will evaluate onsite odors, especially at the northeastern <br />site boundary between the facility and the residences, and evaluate planned <br />operations for the potential to release objectionable odors. If the operator <br />detects an objectionable onsite odor, he will take the following actions: <br />1. Investigate and determine the likely source of the odor. <br />2. Determine if onsite management practices could remedy the problem and <br />immediately take steps to remedy the situation. <br />3. Determine whether or not the odor is traveling beyond the site by patrolling <br />the site perimeter and noting existing wind patterns. <br />4. Determine whether or not the odor event is significant enough to warrant <br />contacting the adjacent neighbors or the LEA. <br />11 <br />