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9/24/2008 3:29 ROM: Fax Valley Organics, Inc. TO: 464-0138 0 <br />: 004 OF 006 <br />Site personnel have been trained to manage all compostable material handling in a manner <br />that minimizes the development of conditions that can lead to objectionable odors. The <br />following list encompasses the most prevalent industry practices, and is in the order of <br />effectiveness as ranked by California operators, according to a state-wide survey conducted by <br />California Polytechnic University, San Luis Obispo, and California <br />1. Reducing the amount of raw material storage time. Valley Organics raw material <br />would be delivered directly from source operations, and processed within two <br />weeks. <br />2. Accepting only certain types of waste. Material to be processed at this site will <br />be feedstock as defined by California Integrated Waste Management Board Title 14, with the <br />exception of food material, delivered directly to the site on a regular basis. <br />3. On-site litter control. A written load -checking plan will be created, and site <br />personnel will be trained in contaminant removal. All incoming material will be checked <br />thoroughly and all physical contaminants, especially plastic bags, will be removed. Any <br />material removed from the feedstock will be deposited in an on-site container, which is <br />emptied weekly. A plastic fence has been installed to keep materials from leaving the <br />property. <br />4. Managing moisture. The composting process requires moisture to be applied to <br />the feedstock, but this can be carefully controlled, given that the average rainfall in the site <br />area is only 12 inches per year. The primary addition of moisture will be done during the <br />process of turning the windrows with specially designed equipment. Frequency of turning and <br />moisture addition is determined by using temperature probes and moisture meters. Optimum <br />moisture content is 40 to 50%, and windrows may sometimes be turned without moisture <br />being added. <br />5. Turning windrows at certain times of day. It is expected that the windrows will <br />be turned on an average of twice a week. Available information indicates that turning the <br />windrows in the morning would minimize odor and release of particulates. Also, turning would <br />be postponed on windy days. <br />6. Managing C.•Nrado. The ideal ratio for composting is considered to be 30 parts <br />carbon for 1 part nitrogen by weight. Grass clippings are rated at 15-25:1. The ratio can be <br />optimized by adding dry leaves, straw, wood 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 />A Daily Log of Occurrences will be maintained, recording, among other things, <br />unusual weather conditions, and any complaints received, including our response. <br />Revised September 25, 2008 <br />