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Odor Impact Minimization Plan—Compost Facility Tracy Material Recovery Facility and Transfer Station 30703 S. MacArthur Drive, Tracy, California 95377 basis so that the composting process is maintained. New materials will subsequently be added to the youngest side of the Project windrow, thus lengthening the windrow. Windrows will be turned by rolling the oldest edge of the windrow and then the next oldest material. A front-end loader and windrow turner will be used to turn the windrows. CCO windrows will be turned, wind permitting, with 5 turns within a 15-day period to ensure pathogen reduction, and then continue composting for an anticipated period of 12 to 20 weeks. Subsequent curing of material in place will take place for up to six weeks. • Water will be added as necessary to the compost windrows to maintain the appropriate composting moisture and control dust. A piped irrigation system is used to add water to the windrows. • Pathogen Reduction for Windrow Composting: The process of turning windrows provides sufficient oxygen to sustain the biological activity and keep the material at a temperature of 55 degrees Celsius (131 degrees Fahrenheit), or higher, for a period of 15 days, or longer, which meets regulatory pathogen reduction requirements (14 CCR §17868.3). There will be a minimum of five turnings of the CCO windrows during a 15-day period during which readings such as temperature and oxygen content are monitored and documented. When the desired level of decomposition has been achieved, the CCO compost materials will be moved to the curing areas for a six-week period or left in place until shipment from the site • At the start of all CCO composting cycles, temperatures will be taken and recorded daily to confirm satisfactory results. Temperature measurements will be taken at 1.5 to 2 feet below surface for Elongated Windrow Method. This will be performed to allow for accurate temperature measurements deep within the windrow. The minimum frequency for temperature readings for all composting methods will be based on a 200 cubic yard volume per reading. Procedures for taking temperatures • Temperature probes 2 feet long, with a dial on one end and a thermocouple on the other will be used for taking temperatures. The probe will be inserted into the windrow at depths at which the temperatures will be taken as discussed above. • The same person taking the temperatures using the same technique each time will be utilized whenever possible to aid in eliminating variables. • Points for probe insertion shall be chosen to produce the most representative readings of internal temperatures. 8