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1 1 1 t t f t d i 1 f 1 1 i 1 M I ► <br /> d B Table 4.13-9 <br /> Detailed Analysis of Predicted Traffic Noise Levels at Existing Sensitive Receptors <br /> along Roadway Segments Meeting Screening Thresholds <br /> o Distance from Existing College Project Results in <br /> 7 Road Receptor centerline of Existing Noise ParkBulldoutNoise Exceedanceof65 Project Increases Noise Significant <br /> iv Segment and Number(s) widened roadway to Level(dBA Level(dBA Increase dBA Ld" Levels by 3.0 dBA or Impact <br /> Side of Road° property line(feet)b LmJCNEL) LndCNEL)qd Threshold Greater at Receptor? <br /> 0 <br /> Byron Road between Mountain House Road and Mountain House Parkway <br /> Cn South 1 68 69.96 67.83 None No No No <br /> North 2,3,4 1180 64.76 63.63 None No No No <br /> v Byron Road between Mountain House Parkway and Hansen Road <br /> South 5,6 68 69.70 70.50 0.80 No No No <br /> o North 7, 8 118` 62.84 64.89 2.05 No No No <br /> Mountain House Parkway between Grant Line Road and I-205 <br /> m <br /> � West 9 88 60.12 60.55 0.43 No No No <br /> East 10, 11, 12 88 60.12 60.55 0.43 No No No <br /> a Grant Line Road between Mountain House Road and Central Parkway f' <br /> 4, South 13" 35/83' 71.29 66.92 None No No No <br /> w North 14 83/63 65.54 69.11 3.57 No Yes Yes <br /> Grant Line Road between Central Parkway and Mountain House Parkway k <br /> North 15 63 67.37 66.62 None No No No <br /> Notes: <br /> ` Refer to Figure 4.13-2 for locations of sensitive receptors(identified with red square and circled number).All sensitive receptors are single-family residences. <br /> ° It Is assumed that the right-of-way of each road extends 15 feet on either side,unless otherwise noted. <br /> ` Resultant sound levels account for increases in traffic resulting from project-generated trips as well as any proposed widening of the road. <br /> d. Traffic noise impacts on existing noise-sensitive uses are determined based on existing traffic conditions with and without implementation of the proposed project.This is <br /> compared with traffic noise impacts on proposed noise-sensitive uses,which is determined based on cumulative traffic conditions with and without implementation of the <br /> proposed project. <br /> Residential properties along the north side of Byron Road are located further from Byron Road because of a Union Pacific Railroad right-of-way, <br /> " For the portion of Grant Line Road west of Central Parkway,widening would predominantly occur to the north and a frontage road would be added along the north side of Grant <br /> Line Village south of the southern edge of the existing road,as shown in Figures 3-15 and 3-16b in Chapter 3,"Project Description." <br /> 9' For the portion of Grant Line Road east of Central Parkway,widening would occur equally to the north and the south. <br /> " Receptor 13 consists of all the houses In Grant Line Village located along the southern side of Grant Line Road. <br /> The property line is 35 feet south of the existing centerline of Grant Line Road.The property line would be 83 feet south of the centedine of the proposed widened Grant Line <br /> Road. <br /> t The property line Is approximately 83 feet north of the existing centedine of Grant Line Road.The property line would be 63 feet north of the centedine of the proposed widened <br /> section of Grant Line Road. <br /> ` The south side of Grant Line Road east of Central Parkway is not evaluated because there are no existing sensitive land uses along the south side of this roadway segment. <br /> Z mSource:Data compiled by EDAW in 2004 <br /> go <br /> m. D <br />