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TABLE 1-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES <br />Significant Impact <br />Significance <br />Before <br />Mitigation Mitigation Measures <br />Significance <br />With <br />Mitigation <br /> NOISE-1B: All residential units of the Project shall include an <br />alternative form of ventilation, such as noise-baffled passive air <br />ventilation systems or mechanical air conditioning systems, that <br />would allow windows to remain closed for prolonged periods of time <br />to meet the interior noise standard of 45 dBA Ldn established by the <br />City and the Uniform Building Code Requirements. <br /> <br />NOISE-2. Implementation of the Project could result in <br />the exposure of persons to or generation of excessive <br />groundborne vibration or groundborne noise levels. <br />S NOISE-2. For construction, grading, and demolition activities that <br />would use vibration-intense equipment such as pile driving, rock <br />blasting and vibratory rollers that would occur within 250 feet of <br />existing residential, commercial, libraries, and hotel buildings, the <br />following mitigation measures shall be implemented in close <br />coordination with City of San Leandro staff so that alternative <br />construction techniques or scheduling approaches are undertaken. <br />For projects where vibration-intense equipment would be utilized <br />within 250 feet of existing residential, commercial, libraries, and <br />hotel buildings the following controls to reduce potential vibration <br />impacts shall be implemented during construction, as practical: <br /> Prior to the issuance of building permits, City staff shall <br />coordinate with the applicant and/or construction contractor to <br />discuss alternative methods of construction for vibration-intense <br />activities in close proximity to sensitive uses or existing <br />structures. As part of this coordination, the applicant and/or <br />construction contractor shall identify construction methods not <br />involving vibration-intensive equipment or activities. For example, <br />drilled foundation caisson holes that would produce less vibration <br />than pile driving methods, or the use of non-explosive rock <br />breaking methods. <br /> The project applicant or constructor contractor shall implement <br />reduced-vibration alternative methods identified during project <br />review during subsequent excavation, grading, and construction <br />for work conducted in close proximity to sensitive structures or <br />uses. <br /> If possible, vibration-intense construction activities should take <br />place during times when nearby sensitive receptors, such as <br />libraries and hotel rooms are at their lowest utilization/ <br />SU