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Agricultural products are brought to the site in small trucks and usually dumped on a concrete slab. The materials consist of grape and tomato wastes, leaves, and other organic material. This material is pushed into windrows 8' high, 18' wide and up to 300' long. A Scarab Aerator turns and aerates the windrows once every two weeks. Water is added if necessary, to keep the moisture content at 30%. Composting time runs from two weeks to six months depending on the material. The Aerator, produces 80 dBA at 50' when operating. For purposes of this evaluation it will be assumed to operate an average of two hours on the day it is aerating the compost windrows. Additionally, a loader will operate for 1 hour to dress up the windrows. Noise produced by the aerator/loader is shown on Figure N-7. Highest noise levels occur at prediction Sites A, E and H which are closest to the operation. 5) Waste Building Materials Metal Recovery Area This operation takes lace throughout the site and lasts for 4 - 6 hours per day at Pe P present. In the future the hours will be from 7:00 a.m. to 10:00 p.m. and one additional piece of equipment will be necessary. At that time the equipment operating will be: Case W-14 Loader, Cat Loader, Shaker Screen. Combined noise from all three of these pieces of equipment operating simultaneously is estimated at an equivalent level of 88 dBA at 50'. Figure N-8 shows noise predictions related to this operation. Largest impacts are understandably at the prediction points F and G which are closest to the operation. Day-night averages here were 69 dBA and 77 dBA, respectively. 6) New Transfer Station The new building shown on Figure N-9 will house a new baler, and compactor as well as the present refuse handling operations: dumping, sorting, loading, etc. The new operation will be evaluated on a 15-hour basis 7:00 a.m. to 10:00 p.m. with 10 pieces of heavy equipment operating simultaneously inside the building. Night operation 10:00 p.m. to 7:00 a.m. will include 25 pieces of heavy equipment. Equivalent noise produced by the equipment inside the building is estimated at 90 dBA at 50' for daytime operations and 80dBA at 50' for night time operation. The building will be mostly open to the north and east. It will be enclosed to the west and south by a sheet metal wall weighing 1.6lbs/ft. Attenuation of the wall will average 18 dBA over the lower frequency ranges produced by diesel equipment (see Appendix E). Study of Figure N-9 discloses loudest impact occurs at the east property line (Site D) where the average day - night level would be 78 dBA. Equivalent levels here 32