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NED for source two, the roads to the plant (Public and Private) was derived by using the Federal Highway Administration-Traffic Noise Prediction Model, using California Vehicle Noise Emission Levels (CALVENO) . NED for source three, the mining and hauling process was derived by using field data for a similar source, since the scraper fleet is not currently operating at E1 Rancho. The similar source also utilized bottom loading scrapers, however the bulldozer was a D-9 which is larger, presumably louder than E1 Ranchos D-8. Project Defaults For the purpose of this study it is assumed that option one, a scraper fleet will be used to haul raw material to the process facility. Two other options are available. Option two is similar but would use highway legal trucks and a shovel or loader to replace the D-8. This would likely in a reduction of noise levels from the mining and hauling. Option three would use a conveyor to transport ore collected by a front-end loader. This would result in lower noise levels than either option one or two. Current mining plans do not call for any activities closer than 500 ' to the nearest residence, not owned by E1 Rancho. The mining hauling operation was modeled at its closest proximity to both the nearest residence and Waverly Road. During actual operations the mining will only be close to these two receptors less than five percent of the time. During the remaining 95 percent the noise impacts of the mining will not add the off site trucking noise. The excavation of the open pit will also ultimately result in a 10 ' -30 ' depression which, due to the scrapers being below ground level will decrease noise levels by 5- 20 decibels. This factor has not been used in the model however since it is not possible to define all the possible configurations of the mining hauling area. Noise Model The noise model, NOISECAL, developed by the New York State Department of Public Service was used for noise prediction, of the plant. Traffic noise from Waverly Road and the entrance road to E1 Rancho were modeled using the FHWA-TNPM data and calculating attenuation due to distance. Noise from the mining-hauling operation was also calculated for appropriate distances and added to the NOISECAL predictions. Receptor points were located along the property boundary and adjacent to Waverly Road. These receptor coordinates and projected noise levels are included in Tables 1 and 2 . The model outputs one hour averages. These averages are used to CONDOR