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City of San Leandro <br />311 MacArthur Boulevard Residential Project <br /> <br />70 <br />Table 11 Construction Equipment Noise Levels <br />Equipment Approximate dBA (50 feet) <br />Air Compressor 80 <br />Backhoe 80 <br />Compactor 82 <br />Concrete Mixer 85 <br />Bulldozer 85 <br />Generator 82 <br />Grader 85 <br />Jackhammer 88 <br />Loader 80 <br />Paver 85 <br />Roller 85 <br />Scraper 85 <br />Truck 84 <br />Source: Federal Transit Administration 2018 <br />Section 4-1-1115(b) of the San Leandro Municipal Code restricts construction hours to between 7:00 <br />a.m. and 7:00 p.m. on weekdays and between 8:00 a.m. and 7:00 p.m. on Saturday and Sunday with <br />no construction allowed on federal holidays. Further, compliance with noise policies from the 2035 <br />General Plan would ensure project noise is reduced to the extent feasible. Measures include <br />requiring conditions of approval for construction noise hours, maintenance and inspection of <br />construction equipment, notification of a representative responsible for responding to noise <br />complaints, limiting idling, utilizing smart back-up alarms, and using low-noise equipment. This <br />impact would be less than significant and not greater than analyzed in the General Plan EIR. <br />LESS THAN SIGNIFICANT OR LESS THAN SIGNIFICANT WITH MITIGATION INCORPORATED <br />b. Would the project result in generation of excessive groundborne vibration or groundborne noise <br />levels? <br />Operation of the project would not include any substantial vibration sources (i.e. no pile driving or <br />blasting). Thus, construction activities have the greatest potential to generate ground-borne <br />vibration affecting nearby receivers, especially during grading and excavation of the project site. <br />Vibration-generating equipment may include bulldozers and loaded trucks to move materials and <br />debris, drills to install foundation, and vibratory rollers for paving. The vibration level threshold at <br />which transient vibration sources (such as construction equipment) are considered to be distinctly <br />perceptible is 0.24 in./sec. ppv. This is roughly equivalent to 94 vibration velocity (VdB) VdB. <br />The greatest anticipated source of vibration during general project construction activities would be <br />from a vibratory roller, which may be used during paving activities and may be used within 25 feet