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TABLE 1-1 SUMMARY OF IMPACTS AND MITIGATION MEASURES <br />Significant Impact <br />NOISE -3. Implementation of the Project would result in a <br />substantial permanent increase in ambient noise levels in <br />the vicinity of the project site above levels existing <br />without the Project. <br />Significance <br />Before <br />Mitigation Mitigation Measures <br />occupancy. <br />■ Prior to the issuance of building permits, the applicant and/or <br />construction contractor shall inspect and report on the current <br />structural condition of the existing buildings within 200 feet from <br />where pile driving, rock blasting, or within 30 feet from where <br />vibratory rollers would be used. <br />■ During construction, if any vibration levels cause cosmetic or <br />structural damage to existing buildings in close proximity to a <br />project site, the applicant shall immediately issue "stop -work" <br />orders to the construction contractor to prevent further damage. <br />Work shall not restart until the building is stabilized and/or <br />preventive measures are implemented to relieve further damage <br />to the building(s). <br />With implementation of the mitigation measures listed above, the <br />project would reduce potential vibration impacts. It is not known at <br />this point if implementation of these measures would be feasible <br />and if they would provide enough reduction to mitigate levels below <br />thresholds. Even with implementation of the mitigation measures <br />above, the project could result in substantial vibration levels to uses <br />in the vicinity of the project site. This impact would be significant <br />and unavoidable. <br />NOISE -3: The existing single-family and multi -family residential uses <br />along Marina Boulevard west of Aurora Drive would experience a <br />noise increase of 4.1 dBA for all three scenarios due to project - <br />related traffic. The resulting noise level at uses along this segment <br />would be greater than 60 dBA Ldp, which is the exterior noise level <br />that the City strives to achieve for residential exterior uses. <br />According to the City's General Plan Policies 35.03 and 35.04 listed <br />above, the noise level increase greater than 3 dBA and resulting in <br />an ambient noise level greater than 60 dBA Ldn at noise -sensitive <br />residential uses along this segment would be considered a significant <br />impact. Potential mitigation measures to be considered would be <br />the construction of noise barriers along this road, or resurfacing this <br />segment with rubberized asphalt. However, the construction of <br />noise barriers are not feasible as the residential areas front and <br />Significance <br />With <br />Mitigation <br />SU <br />