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control. Process monitoring of composting conditions, especially aeration, is necessary for odor control. Research suggests that maintaining the oxygen level at 5 to 15 percent inside the compost pile, controlling the moisture content, and maximizing the decomposition rate will sere to minimize odors. In general, odors are controlled by processing the wastes and removing them as soon as possible after they have been brought into the RRF. Odor control procedures will be implemented to prevent odor impacts. Efforts to prevent and reduce odors will include: • Avoiding creating large stockpiles of incoming material • Producing a homogeneous material with the proper moisture content • Providing adequate aeration and agitation • Incorporating careful control of processing temperatures to maintain the rate of decomposition. Additionally, as required in 14 CCR, Sections 17863.4 and 18227(n), an Odor Impact Minimization Plan (GIMP) is included as Appendix D. Odors are not anticipated from residue storage since residue will be stored for no more than 48 hours. If persistent odors are produced, additional odor control techniques that may be implemented include: • Maintaining a C:N ratio above 25:1 in initial mixes of high nitrogen materials; • Placing a layer of cured compost over raw compost materials to act as an odor trap and sere as insulation; and, • Using an organic odor neutralizer. Lastly, the remote location of the Compost Facility will minimize the impacts of any odors generated at the site. 3.6.3 Noise Control Describe how noise will be controlled to prevent health hazards to persons using the facility and to nearby residents. Include a statement as to whether noise from facility operations is likely to create health hazards to persons using the site and/or to nearby residents. Indicate whether nearby residents have complained about noise from facility operations. If noise measurements representative of facility operations have been conducted, submit a copy of the results. Noise at the site includes traffic noise generated by trucks and other vehicles travelling on Austin Road to the landfill and RRF/Compost Facility and noise generated by the equipment used in RRF/Compost Facility operations. Noise levels of onsite equipment are controlled by proper maintenance of mufflers to factory specifications. Noise levels have not been a problem at the site, based on the absence of formal complaints. Noise levels are not likely to create health hazards to persons using the site due to the use of mufflers on heavy equipment. Protective ear wear is provided to all employees. Due to the remote location of the site, noise levels are not likely to create health hazards to nearby residents. In general, the major sources of noise at the Compost Facility/RRF will be the grinder and the Windrow turner, if used. These machines typically produce sound levels in the range of approximately 85 to 90 decibels. Since the estimated sound level at 200 feet is Forward Composting Facility RC51 7/20/09;Page 45 SWT Engineering