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Valley Organics, Inc. <br /> Application — Site Approval Exhibit A <br /> Odor Management Impact Plan <br /> This facility would process only greenwastes from commercial landscape <br /> maintenance. Odor management controls would be implemented according to <br /> industry practice. The following list encompasses the most prevalent industry <br /> practices and is in order of effectiveness as ranked by California operators, <br /> according to a state-wide survey conducted by California Polytechnic University, <br /> San Luis Obispo and California Integrated Waste Management Board: <br /> 1. Reducing the amount of time the greenwaste is stored. Valley Organics <br /> raw material would be delivered directly from landscape maintenance <br /> operations, and processed within 48 hours. <br /> 2. Refusal to accept certain types of waste. Material to be processed at this <br /> site will be greenwaste from landscape maintenance, delivered directly to <br /> the site on a regular basis. Curbside greenwaste, which may lie at the <br /> curb for days, and has been found to create the most odor problems, will <br /> not be accepted. <br /> 3. Managing moisture. The composting process requires moisture to be <br /> applied to the greenwaste, but this can be carefully controlled, given that <br /> the average rainfall in the site area is only 12 inches per year. <br /> 4. Turning windrows at certain times of day. It is expected that the <br /> windrows will be turned on an average of twice a week. Available <br /> information indicates that turning the windrows in the morning would <br /> minimize odor and release of particulates. Also, turning would be <br /> postponed on windy days. <br /> 5. Managing C.•Nratio. The ideal ratio for composting is considered to be 30 <br /> parts carbon for 1 part nitrogen by weight. Grass clippings are rated at <br /> 15-25:1. The ratio can be optimized by adding dry leaves, straw, wood <br /> chips or sawdust during processing. <br /> Other odor management controls that will be used by Valley Organics, include: <br /> Managing the pH of the material. <br /> Using public outreach programs to educate neighbors about the operation. <br /> And, if odor becomes a problem, odor neutralizing or masking agents <br /> would be used. <br />