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Table 4.6-2 <br /> Processing Area Noise Sources and Predicted Noise Levels <br /> Alternatives 1 and 2 <br /> Reference Level Receiving Distance Predicted Ld„1Leq <br /> Source at 100 feet- LQq,. Location from Source at Receiver,r� <br /> (feet)3 <br /> Processing 75 dB Nearest PIL 400 63 dB <br /> Equipment Residence 1 2,300 48 dB <br /> Residence 2 4,000 43 dB <br /> Asphalt Plant 80 dB Nearest PIL 500' 66 dB <br /> Residence 1 2,000 54 dB <br /> .Residence 2 4,000 48 dB <br /> Sales/Load-Out 65 dB Nearest PIL 500 51 dB r <br /> Residence 1 2,000 39 dB <br /> Residence 2 4,000 33 dB <br /> I - Reference levels obtained from noise level measurements of similar equipment conducted in } <br /> recent years and FHWA traffic noise prediction model. w <br /> 2 - Residential receiver location are identified on Figure 4.6-1. <br /> 3 - Approximate distance in feet from effective center of noise source area to receiving location. <br /> A - Levels predicted at the receiver are based on a noise level reduction of 6 dB per doubling of <br /> distance from the source and do not include corrections for atmospheric absorption of sound and <br /> shielding by intervening topography and orchards. <br /> P-1 = property line <br /> Table 4.6-2 data indicate that the noise emissions of the various components of the project <br /> boated in the main plant area are not predicted to exceed the noise standards of the San <br /> Joaquin County Noise Ordinance. In addition, after consideration of the noise attenuation <br /> provided by intervening orchards and topography, these noise emissions are not expected <br /> to significantly exceed existing ambient noise levels at the nearest residential areas. <br /> g Y <br /> Therefore, this impact is not considered to be significant and no mitigation measures would <br /> be required. <br /> Alternative 3: Proposed Project with Bird Road Access to New Interchange <br /> Under this alternative, the plant area would be located near the southwest corner of the <br /> project site (refer to Figure 3-9). Table 4.6-3 shows the reference noise emission levels <br /> used in this analysis for the various processing area noise sources, the locations and <br /> distances to the nearest property line and residential areas, and the predicted processing <br /> area noise levels at those locations in terms of L., and Ld„ . <br /> Draft Environmental Impact Report 4-90 ER-96-3 <br />