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1 ~ ~ Environmental Checklist ' For CEQA Compliance resolution of noise problems that cannot be immediately solved by the site supervisor. Long-Term Noise Potential long-term offsite noise would primarily be generated by onsite traffic from future residents living in the proposed project or from visitors to the proposed project. The Trip Generation Manual defines the existing warehouse as a Light Industrial use. Light industrial uses usually employ fewer than 500 persons, with an emphasis on activities other than manufacturing, and they typically have minimal office space (Institute of Transportation Engineers 2003:89). The existing warehouse currently generates 370 daily trips to the site, including 49 AM peak hour and 52 PM peak hour trips. The proposed project would generate 364 daily trips to the site, including 29 AM peak hour and 39 PM peak hour trips. This would result in a net decrease of 6 daily trips, 20 AM peak hour, and 13 PM peak hour trips to the site. Since the proposed project is not anticipated to generate a significant amount of traffic, and in fact decreases the amount of traffic, the project would not generate significant noise impacts on surrounding land uses (Mestre Greve Associates 2007:11). Potential long-term onsite impacts related to traffic noise from Alton Avenue and South Fairview Street were analyzed using traffic volumes and the FHWA Highway Traffic Noise Model. The modeling results are shown in Table 3-3, and the results do not take into account any barriers or topography that may reduce noise levels. Table 3-3. Existing Roadway Traffic Noise Levels Distance (Feet) to CNEL Contour from Centerline of Roadway Roadway Link 70 CNEL 65 CNEL 60 CNEL Fairview Street 85 183 394 West of Alton Avenue Alton Avenue North 33 71 152 of Fairview Street The worst-case onsite noise levels, which are due to traffic noise from South Fairview Street and Alton Avenue, were calculated to be 70.8 CNEL at the property line along South Fairview Street and 65.0 CNEL at the property line along Alton Avenue. These levels equal or exceed 65 CNEL required by the City's noise element and noise ordinance; therefore, the long-term, onsite noise levels generated by the two streets are considered a significant impact to the first floor of the residential units. However, the proposed project includes the construction of a wall around the property at a height of more than 7 feet to reduce street level noise. Additionally, Mitigation Measure N-11 below would ensure the noise barrier is constructed out of the proper acoustical-resistance material. Therefore, the significant impact at the street level of the residential units due to traffic noise on Alton Avenue and South Fairview Street is reduced to less than significant. Furthermore, units along both South Fairview Street and Alton Avenue may not meet the outdoor to indoor noise standards of the City based on the noise measurements of Alton Alton Court August 2007 Initial StudylMitigated Negative Declaration 3-33 J&S 00635.07 ~ 75A-99