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Report of Composting Site Information Tracy Material Recovery Facility and Transfer Station 30703 S. MacAurthur Drive, Tracy, Ca. 95377 • Water will be added as necessary to the compost windrows to maintain the appropriate composting moisture and control dust. A water truck, dedicated to the compost facility, will be used to spray water while driving down the pathways between the windrows. The frequency of spray irrigation will vary with the season. The water truck will also be used to control dust generation during grinding or screening and be available for fire protection. • During the pathogen reduction phase, 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 5 turnings of the windrow during a 15- day period during which readings such as temperature and oxygen content are monitored and documented on a daily basis. For management purposes, upon completion of the pathogen reduction phase, temperature of the windrows is measured as needed to properly manage process and 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 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. • At the start of all 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 the elongated windrow process. The minimum frequency for temperature readings for composting method will be based on a 200 cubic yard volume per reading. Procedures for takinq temperatures: • Temperature probes 3 feet long, with a dial on one end and a thermocouple on the other will be used for taking temperatures. • 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. The total time feedstock remains at the facility using the elongated windrow method is approximately 13 weeks. After the compost process, the material will be cured an average of 30 days. The finished product will be stored on-site until the product is shipped off to market. 12