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• Equipment used for project construction shall be hydraulically-or electrically-powered impact tools(e.g.,jackhammers, pavement breakers,and rock drills)wherever possible to avoid noise associated with compressed air exhaust from pneumatically-powered tools. However, where use of pneumatically powered tools is unavoidable, an exhaust muffler on the compressed air exhaust shall be used; this muffler should lower noise levels from the exhaust by up to about 10 dBA. External jackets on the tools themselves shall be used where feasible,and this should achieve a reduction of 5 dBA. Quieter procedures such as drilling rather than impact equipment shall be used whenever feasible. • Stationary noise sources shall be located as far from residential receptors as possible. If they must be located near residential receptors,they should be adequately muffled and enclosed within temporary sheds. • Limit continuous operation of heavy equipment near sensitive receptors. • The name and phone number of the designated project liaison shall be posted at the project site boundary so that the public can contact the liaison if noise disturbance occurs. This liaison shall immediately take steps to resolve any complaints received, including modifying construction practices as necessary to address the noise complaint. Significant Impact Impact 4.7-2: Project construction would increase construction-related traffic on local streets for the duration of project construction. Finding Changes or alterations have been required in, or incorporated into,the project which mitigate or avoid the significant effects on the environment. Facts in Support of Finding The City of Pleasanton has adopted the following measures which will reduce potential construction period traffic noise impacts to a less-than-significant level: Mitigation Measure 4.7-2: To minimize the number of residents exposed to temporary increases in truck traffic noise, construction-related trucks shall be required to use Independence Drive to Bernal Avenue to access Sunol Boulevard and the 1-680 freeway. In addition, haul and delivery truck operations shall be limited to the daytime weekday hours (8:00 a.m. to 5:00 p.m.)to minimize noise disturbance. Significant Impact Impact 4.7-4: Operation of proposed residences would result in noise increases from residential activities on-site as well as project-related traffic increases on local residential streets. Finding Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid the significant effects on the environment. Facts in Support of Finding The City of Pleasanton has adopted the following measures which will reduce potential operational traffic noise impacts to a less-than-significant level: Mitigation Measure 4.7-4: The City shall require the project applicant to reduce the project's estimated 5.6 dBA increase on Lund Ranch Road to 4 dBA or less. Such a reduction could be achieved by: (a) reducing the number of residential units using Lund Ranch Road in order to sufficiently reduce noise generated by project related traffic volumes; and/or(b) by resurfacing Lund LUND RANCH II(PUD-25)RESIDENTIAL PROJECT 15 FINDINGS