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iI Project Description — Report of Composting Site Information s Tracy Material Recovery Facility and Transfer Station 30703 S. MacArthur Drive, ,Tracy, Califorala 95377 ,I vectors are frequently carried into solid waste facilities and compost facilities by,l!delivery trucks, and may migrate on site from surrounding lands. Maintenance of appropriate temperature and moisture within active compost windrows provides excellent vector control, as the heat of decomposition both destroys pests within piles, and deters new invasion. Properly constructed drainage facilities will be provided to significantly reduce the potential for liquids and stormwater to pond on the site, mitigating the potential for mosquito propagation. Presence of vectors or conditions that could attract them will be mitigated as needed through appropriate methods. Maintenance, monitoring, and, if necessary, rebuilding of compost piles will ensure vector control. Vector eradication programs could further employ electric'p°bug zappers", chemical sprays, and/or traps. Commercial pest control services could be retained as necessary. Bioaerosols: Potential adverse health effects associated with airborne fungal spores, specifically Aspergillus fumigatus and or Aspergillus flavus, have raised concerns by some Californians during the siting and operation of compost facilities. The staff of the California Integrated Waste Management Board in cooperation with the California Department of Health Services, and Cal/EPA's Office of Environmental Health Hazard Assessment prepared a technical bulletin during 1993, and released the summary of findings in LEA Advisory No. 6 dated December 16, 1993. A properly operated compost facility should not present a health risk from Aspergillus fumigatus. Sound management practices include maintaining moisture, temperature and pH levels, aerating, turning and mixing. Reducing the dispersal of dust and spores best controls exposure. The uses of water sprays or mists while turning piles, and refraining from turning on windy days will help accomplish this. TMR/TS & CF plans to follow the best management practices (BMP's) outlined in LEA Advisory No 6. These include: Maintaining the windrows in an aerobic condition through regular aeration and ' mixing. Maintaining windrow moisture content between 45 and 60 percent. • Maintaining adequate windrow temperatures (above 55 C) throughout the pathogen " reduction period (as mandated by 14 CCR §17868.3). • Controlling dust through regular application of water • Issuing personal protection equipment such as dust masks to personnel in close contact with composting materials. 'i Fire Control: The primary focus is on fire prevention. The maintenance of proper moisture and temperature control of materials will minimize the potential for fire. An It 27Pro)—' � Edgar&Associates,Inc. Tracy Compost Fac esc1218--