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Odor Impact Minimization Plan —Compost Facility Tracy Material Recovery Facility and Transfer Station 30703 S. MacArthur Drive, Tracy, California 95377 turnings, and sampling) and allow site personnel to isolate material waiting testing results. The Site Manager will keep a Map showing windrow location and numbering system. • 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. A windrow turner, or a front-end loader as back up, 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 piped irrigation system is used to add water to the windrows. The frequency of spray irrigation will vary with the season. A water truck will also be used to control dust generation during grinding or screening and be available for fire protection. • 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 5 turnings of the windrow during a 15-day period during which readings such as temperature is monitored and documented. When the desired level of decomposition has been achieved, the compost materials will be moved to the screening area. • At the start of all composting cycles, temperatures will be taken and recorded five days per week 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 bag at points, which will be recorded for subsequent readings. • 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. 6 170.18 Tracy GIMP 121907.doc