3_Exhibit B - Laserfiche WebLink

4. Environmental Setting, Impacts, and Mitigation Measures J. Noise General Plan Amendment and Rezonings 4.J-34 ESA / 210016 Draft Supplement EIR September 2011 TABLE 4.J-7 (Continued) SUMMARY OF TRAFFIC NOISE MODELING RESULTS – CUMULATIVE (2035) NOISE EXPOSURE (LDN) AT 100 FEET FROM ROADWAY CENTERLINEa,b Roadway Segment Existing (A) Cum. (2035) + Project (B) Change (B-A) Cumulatively Significant? (Yes or No)3 Vineyard East of Bernal 61 61 0 No Bernal North of Vineyard 62 64 2 Maybe Bernal South of Vineyard 61 63 2 Maybe Tawny East of Bernal 53 54 1 Maybe Vineyard West of Bernal 56 57 1 Maybe Sunol North of Valley 63 66 3 Maybe Sunol South of Valley 64 66 2 Maybe Junipero Street East of Sunol 54 54 0 No Valley West of Sunol 57 59 2 Maybe Fallon North of Stoneridge N/A 65 N/A No El Charro South of Stoneridge N/A 64 N/A No Friesman East of Fallon N/A 61 N/A No Stoneridge West of Fallon N/A 65 N/A No El Charro North of Stanley Boulevard N/A 63 N/A No Stanley Boulevard East of El Charro N/A 66 N/A No Stanley Boulevard West of El Charro N/A 67 N/A No a Noise levels were calculated using the FHWA-RD-77-108 Traffic Noise Prediction Model for peak-hour conditions derived from average daily traffic levels. Noise levels were calculated at 100 feet from the centerline of the roadway. b The average vehicle speed varies for individual segments between 25 mph and 45 mph, based on roadway classification. The vehicle mix consists of 98 percent automobiles, 1 percent medium trucks, and 1 percent heavy trucks for neighborhood arterial roads and 96 percent automobiles, 2 percent medium trucks, and 2 percent heavy trucks for major arterial roads. The thresholds of significance include a 5+ dB increase in project-related traffic noise exposure or a project-related increase in traffic noise exposure that would cause overall traffic noise levels to exceed the applicable 60dBLdn standard for single-family land uses or 65dBLdn standard for multi-family land uses. Each roadway segment was reviewed via aerial photo to identify the existence of residential uses, existing noise-mitigating construction (i.e., noise barriers) for these uses, and to determine if project-related noise increases could exceed the established significance criteria. A significant noise impact was established for those roadway segments where project- related noise increases would be 5+ dB or where the project-related increase could cause noise exposure to exceed the applicable 60/65 dB Ldn noise exposure limit in residential recreation areas. SOURCE: Environmental Science Associates, 2011 Housing Element Significance after Mitigation: Less than Significant. Climate Action Plan Mitigation: None Required.