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Report of Composting Site Information Tracy Material Recovery Facility and Transfer Station 30703 S. MacArthur Drive, Tracy, Ca. 95377 • At each composting location, the identity of each windrow is designated by an identification number on the site composting schematic. All information pertaining to each pile will be documented in site records, allowing identification of pile status (e.g. start date, temperature readings, turnings, and sampling) and allowing site personnel to isolate material awaiting testing results. The numbers assigned for each pile will be unique and will not be repetitive. •• The temperature and moisture of the windrow materials will be monitored and controlled, and the windrows turned on a regular basis so that the composting process is maintained. New materials will subsequently be added to the newest side to lengthen the windrow. A front-end loader and/or a windrow turner will be used to turn the windrows. Windrows will be turned to meet the time and temperature requirements as discussed below, wind permitting, for an anticipated period of ten to fourteen weeks. • 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 taking temperatures: • Temperature probes 3 feet long, with a dial on one end and a thermocouple on the other will be used for taking temperatures. 12