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and actions taken to minimize odors in the future. Notify the LEA and other interested parties of the status of the complaint. The use of an identified "complaint form' may help many operations with tracking and documentation of odor events. Identify the form in the OIMP and place it as an attachment if used. v Emissions from compostable materials usually demonstrate their most objectionable qualities in the front end of the composting process, first two to seven days. Site operations can take advantage of this fact by adjusting handling and pile geometry in the first week, or sometimes even the first three weeks. vi The most common form of aeration is passive (or convective aeration) with periodic pile agitation (or turning). In most cases the convective flow (with diffusion) provides the piled, compostable material with most of its oxygen. Many of the decomposers in the pile do fine with oxygen levels below 10°%0. Although forced -air systems can greatly increase the available oxygen in most systems, the challenges are many to get the air where it needs to be (as is the case with bio -filters also). vii The use of handling methods specifically developed for high -moisture content materials, such as grass clippings, food wastes, or biosolids, cannot be overstressed. The identification and initial handling of these high -moisture materials can be the single most crucial step in odor impact management. There may also be significant seasonal variations in the moisture content of these materials, grass clippings being the best example. The method by which moisture is added to feedstock as it is chipped and ground may play an important role also. Particle coating is the goal, as opposed to a measurable 50-60% overall moisture content. viii The benefits from adequate load -checking are many. Language such as, "All incoming feedstock is checked for physical contaminants. A spotter is on-site during operating hours," might be sufficient for many operations. See note vii, also. ix Misting/spray systems can provide effective control of dust and water-soluble, odor -causing compounds. Water may be introduced with sprays in great enough quantities to increase the overall moisture content, but misting systems do not add significant moisture when used during the chipping/grinding and screening processes. x Again the receipt/initial handling of materials presents an opportunity to address odor, Some materials may require immediate mixing with high carbon, relatively dry, woody material or even stockpiled odor — trapping ash. Pile temperatures of heterogeneous materials should be monitored to prevent fires in the feedstock storage areas. (See also note vii and xiii) xi Pile geometry has a direct impact on convective aeration and therefore odor -generating potential. In general, smaller, steeper piles have better convective characteristics. xii Weather-related operational changes must be considered by most operations. If wind direction or meteorological conditions may cause off-site odors, operations personnel should implement an operations adjustment. A typical protocol may include the following: 1. Stop all operations that will cause off-site odor. 2. Determine if on-site management practices may remedy any odor problems and immediately take steps to remedy the situation. 3. Determine whether or not the odor is traveling beyond the site by patrolling the site perimeter. Do not start operations again until the wind and meteorological conditions are favorable and will not promote off-site odors 4. Determine whether or not the odor has moved off-site and if so, if it is significant enough to warrant contacti ng the adjacent neighbors and/or the LEA. Maintenance of operational areas for spreading and/or temporary storage may be necessary for some operations during adverse weather conditions. xiii As fires and resulting products of combustion may cause off-site odors, temperatures of high-risk piles should be monitored daily. Ample areas for spreading and wetting of burning materials should be