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• Placing a layer of cured compost over raw compost materials to act as an odor trap and serve as insulation • 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. 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 facil- ity 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 and noise generated by the equipment used in landfill and RRF operations. Noise levels of on site equipment are controlled by proper mainte- nance of mufflers to factory specifications. Noise levels have not been a problem at the site, based on the absence of formal complaints. However, because of the increased vol- ume of traffic under the proposed permit waste quantity limits, one of the mitigation mea- sures identified in the EIR was to provide the landowner and tenant at 9640 Austin Road with the option of a constructing a sound wall on their property to reduce noise exposure both in the front yard and inside the house if they request it within 5 years after the approval of Use Permit U-91-12. 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 w1 11 be the gender and the Windrow turner, if used. These machines typically produce sound levels in the range of 85 to 90 decibels. Since the estimated sound level at 200 feet is approximately that of the human voice during normal conversation, noise should not be a health hazard to per- sons working 200 feet from the equipment.' A noise level study conducted for a tub grinder manufacturer shows the following sound pressure levels: within 50 feet, 85.2 decibels; within 100 feet, 78.4 decibels; and within 200 feet, 73.5 decibels. 'Irwin,J. D., and E. R. Graf, Industrial Noise and Vibration Control, 1979. wa10029B5C.wp5/70 9/29/94 70