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Table 8 Predicted Nighttime Project Truck Passby Interior SEL Values within Bedrooms of Nearest Residences to East River Road with Bedroom Windows Open Interior SEL, dB Fagade Exterior SEL at Direct Side Rear Side of Dist. Building Window Window Window Road Residence (ft.) Fagade, dB Exposure Exposure Exposure North 1 60 79 69 64 59 North 2 60 79 69 64 59 North 3 140 74 64 59 54 North 4 225 71 61 56 51 North 5 100 76 66 61 56 North 6 120 75 65 60 55 North 7 260 70 60 55 50 North 8 175 72 62 57 52 North 9 150 73 63 58 53 North 10 135 74 64 59 54 North 11 80 77 67 62 57 North 12 110 75 65 60 55 North 13 110 75 65 60 55 South 1 340 68 58 53 48 South 2 70 73 63 58 53 South 3 55 75 65 60 55 South 4 60 79 69 64 59 South 5 350 68 58 53 48 South 6 165 73 63 58 53 South 7 90 77 67 62 57 South 8 100 76 66 61 56 South 9 135 74 64 59 54 Note- Interior SEL values computed using reference level of 82 dB SEL at a distance of 40 feet, a 4.5 dB decrease in SEL value per doubling of distance, and building fagade attenuation rates of 10, 15, and 20 dB for open windows with direct, side, and rear exposure to East River Road: respectively. Shaded entries indicate potential exceedance of interior 65 SEL objective. The SEL values for Receivers 2 & 3 on the South Side of the road were reduced by 5 dB to account for the presence of existing noise barriers at those locations. Source: BAC The Table 8 data indicate that the potential exists for interior SEL values to exceed 65 dB SEL at 7 of the residences located along East River Road provided bedroom windows are open during truck passbys and provided those open windows directly face East River Road. Environmental Noise Analysis Munn& Perkins e=xpanded Hours of Operations--San Joaquin County .. Page 33