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3.0 ENVIRONMENTAL CHECKLIST <br />City of San Leandro 1388 Bancroft Avenue Project <br />November 2018 Initial Study/Mitigated Negative Declaration <br />3.0-61 <br />be used in static mode only (no vibrations) when within 25 feet of any existing off-site structure. <br />With implementation of mitigation measure MM NOI-1, the project would not result in the <br />exposure of persons to or generation of excessive groundborne vibration or groundborne <br />noise levels. The impact would be less than significant with mitigation incorporated. <br />d) Less Than Significant Impact. Construction activities would consist of demolition of the existing buildings, site preparation (including grading), removal of existing parking lot <br />surfaces, and construction of the new residential building. Construction equipment would <br />include backhoes, bulldozers, front-end loaders, scrapers, graders, and compacting equipment. Typical operating cycles for these types of construction equipment may <br />involve 1 or 2 minutes of full power operation followed by several minutes at lower power <br />settings. Project construction activities would be a source of noise and vibration that could <br />affect off-site noise-sensitive receptors. Noise levels of typical construction equipment are listed in Table 3.12-3. <br />TABLE 3.12-3 <br />TYPICAL CONSTRUCTION EQUIPMENT NOISE LEVELS <br />Equipment <br />Typical Noise Level (dBA) <br />at 50 Feet from Source <br />Lmax Leq(hour) <br />Air Compressor 80 76 <br />Backhoe/Front-End Loader 80 76 <br />Compactor (Ground) 80 73 <br />Concrete Mixer Truck 85 81 <br />Concrete Mixer (Vibratory) 80 73 <br />Concrete Pump Truck 82 75 <br />Concrete Saw 90 83 <br />Crane 85 77 <br />Dozer/Grader/Excavator/Scraper 85 81 <br />Generator 82 79 <br />Jackhammer 85 78 <br />Impact Hammer/Hoe Ram (Mounted) 90 83 <br />Pavement Scarifier/Roller 85 78 <br />Paver 85 82 <br />Pneumatic Tools 85 82 <br />Source: FTA 2006 <br />The San Leandro General Plan Update Draft EIR (San Leandro 2016b) contains mitigation <br />measure NOI-4 , which requires the City to adopt the following construction noise measures <br />as a standard condition of approval for projects in the city that include construction activities: