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their parking places will average 10 minutes per day and the warmup will last 50 minutes each day the combined noise levels for the trucks may be estimated for a number of potential receptor sites. Figure N-4 indicates parking and unparking noise levels that could occur at each of eight sites around the transfer station. Large impacts are predicted at sites A, E, G & H. Sites A and E are receptors located 15' inside the adjacent mobile home park property boundary. Site E is close to Turner Road. While Site A is generally representative of any site removed from Turner that is along the east boundary of the mobile home park. Sites B through H are in an area that is industrially zoned while A and E are not. The latter are in a Commercial Zone which has been developed for mobile homes. 2) Qperational Truck Traffic Figure N-5 shows the path that trucks serving the transfer station will use. Table N-2 indicates the number of trips per hour for each truck function connected with the transfer station. The table represents a 2000 TPD operation and was derived by increasing today's traffic five fold. Noise produced by trucks traveling on the transfer station site is very small due to the 15 MPH speed. Highest level occurs at noise prediction Site D which is 15' outside the property line near the truck exit. In many cases the day-night average figures are higher than the equivalent level produced by the moving trucks. That is because truck noise was averaged with an assumed 43 dBA nighttime ambient level with a 10 dBA penalty, for a total of 53 dBA. 3) Recycling, Truck Washing, Shops Recycling, washing, and shops are all in the eastern part of the site. These operations were combined for analysis and activities were extended to 15 hours per day. A new shop building placed opposite the existing one was added. Figure N-6 shows the results of operating the recycle, shop and truck washing facilities. The noisiest location was Site D. It was most affected by the recycling area which has a can separation function using an air blast inside a steel container. In most other locations the ambient level was higher than the noise produced by the operation due to screening by buildings (10 - 15 dBA attenuation) or distance (6 dBA attenuation per doubling of distance) from the activities. 4) Composting This operation is currently conducted to the rear of the site, but an alternate composting area is shown on the site plan so it will be evaluated instead of the present location. 31