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► Limit loading dock activity,including delivery truck arrivals and departures,to between 7:00 a.m. and 10:00 p.m.at those loading docks with direct line of site of noise-sensitive receptors within a distance of 1,000 feet. Activity at all other loading docks shall be limited to the hours between 5:00 a.m. and 10:00 p.m. Noise studies, including on-site sound level measurements, shall be conducted to ensure that these thresholds are not exceeded.The noise studies shall be funded by the College Park developers and approved by SJCCDD before construction. Landscape Maintenance The following measures shall apply to noise-generating activities associated with landscaping and maintenance of school grounds,neighborhood parks,community parks,and open space. ► On-site landscape maintenance equipment shall be equipped with properly operating exhaust mufflers and engine shrouds,in accordance with manufacturers' specifications.For maintenance areas located within 320 feet of noise-sensitive land uses,the operation of on-site landscape maintenance equipment shall be _ limited to the least noise-sensitive periods of the day,between the hours of 7:00 a.m. and 10:00 p.m. Implementation of the above mitigation measure would reduce new stationary source noise impacts to a less- than-significant level. IMPACT Noise—Increased Traffic Noise. Traffic from the proposed project would not result in exceedance of the 4.13-3 65 dBA CNEL traffic noise threshold or a noticeable(3-dBA or greater)increase in traffic noise at existing noise-sensitive receptors(residential)along Mountain House Parkway or Byron Road,but would result in a noticeable(3-dBA or greater)increase in traffic noise at noise-sensitive receptors(residential)along Grant Line Road.A significant impact would occur. Screening-Level Analysis A screening-level analysis was conducted using the FHWA Traffic Noise Prediction Model.The screening analysis calculated traffic noise levels along affected road segments for existing traffic conditions with and without implementation of the proposed project',based on traffic data from the project traffic analysis(see _ Section 4.11,"Transportation").Input data used in the model included average daily traffic levels for nearby area roads,fleet mixes(percentages of automobiles,medium-duty trucks,and heavy-duty trucks during daytime, evening,and nighttime hours),vehicle speeds, and ground attenuation factors.The project's contribution to the _ existing traffic noise levels along area roads was determined by comparing existing roadside noise levels to predicted noise levels with and without project-generated traffic from full buildout of the proposed College Park project. Table 4.13-8 summarizes the calculated noise levels for existing roadway segments in the vicinity of the project site.These roadway segments are shown in Figure 4.11-1 in Section 4.11,"Transportation."The noise levels shown in Table 4.13-8 indicate conditions at 50 feet from the centerline of the near travel lane.Predicted traffic noise levels were calculated assuming a noise reduction of approximately 4.5 dBA per doubling of distance from the source and no intervening natural or constructed noise barriers. ' 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 compared with traffic noise impacts on proposed noise-sensitive uses that are determined based on cumulative traffic conditions with and without implementation of the proposed project. EDAW College Park at Mountain House Specific Plan III Draft EIR Noise 4.13-20 San Joaquin County