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Report of Composting Site Information Tracy Material Recovery Facility and Transfer Station 30703 S. MacArthur Drive, Tracy, Ca. 95377 • The temperature and moisture of the ASP materials will be monitored and controlled, and the piles turned on a 15-day cycle so that the composting process is maintained and evenly distributed to all materials. A front-end loader or compost turner will be used to move the ASPs, and ASPs will be maintained to meet the time and temperature requirements. • Water will be added as necessary to the ASPs to maintain the appropriate composting moisture. Water will be sprayed under the weatherproof covers, or prior to placing the compost cover layer, as needed to maintain optimum composting conditions. The frequency of spray irrigation will vary with the season and moisture content of feedstock materials. A water truck may also be used to control dust generation during grinding or screening and be available for fire protection. • During the pathogen reduction phase, the controlled aeration process in the covered ASP method 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 3 days, or longer, which meets regulatory pathogen reduction requirements (14 CCR §17868.3). There will be a minimum of 2 rotations of the ASP during a 45-day period during which readings such as temperature and oxygen content are monitored and documented on a continual basis. For management purposes, upon completion of the pathogen reduction phase, temperature of the windrows is measured automatically and aeration flow rates are adjusted by the control system as needed to properly manage the composting process, minimize fire danger, and produce optimum end product. When the desired level of decomposition has been achieved, the compost materials will be screened, then moved to the curing areas for a two to six-week period or left in place until shipment from the site. • Compost product will be sampled at a frequency of one composite of twelve samples per each" 5,000 cubic yards for the metals constituents required by 14 CCR §17868.2. • From the start of all composting cycles, temperatures will be taken and recorded automatically, and monitored daily to confirm satisfactory results. Temperature measurements will be taken at 12 to 18 inches below surface for the ASP process. The minimum frequency for temperature readings for this method will be based on a 200 cubic yard volume per reading. Procedures for taking temperatures • Temperature probes 1 to 2 feet long, with a dial on one end and a thermocouple on the other will be used for taking temperatures. The temperature probes will transmit readings to the control system via hard-wire or radio frequency connections. • Depths at which the temperatures will be taken as discussed above. 16