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Comparison of Impacts Associated with the Proposed Modified Project <br />Construction Noise Standards: Consistent with the Original Project, construction activities of the Modified Project are subject to the <br />City Municipal Code regulations. Thus, the Modified Project would be in compliance with the City’s construction related <br />noise standards. No new or greater impacts related to temporary construction noise would occur from implementation <br />of the Modified Project. <br /> Temporary Increase in Ambient Noise: The Modified Project would be smaller and therefore require less overall <br />construction activity than the Original Project. The Modified Project would develop 240 fewer multi-family residential <br />units and a smaller parking structure with 13,300 square feet less of subterranean parking. The Modified Project would <br />involve the same types of construction equipment that would be operated in similar locations as the Original Project. <br />However, the building setback along the eastern side of the Project site would be 50 feet greater. Thus, construction of <br />building structures would be farther from the residences located to the east of the Project site. Consistent with the <br />Original Project, Mitigation Measures NOI-2 and NOI-3 would be required to prohibit the use of large mobile <br />equipment and loaded trucks within 50 feet of the residences to the east of the Project site and install a temporary <br />noise barrier to reduce the temporary increase in ambient noise to a less than significant level. No new or greater <br />impacts related to temporary construction noise would occur from implementation of the Modified Project. <br /> <br />Groundborne Vibration: Consistent with the Original Project construction activities for of the Modified Project would <br />generate short-term vibration levels that would exceed the distinctly perceptible vibration standard at receiver locations <br />within 50 feet of large bulldozers usage. Therefore, like the Original Project, Mitigation Measure NOI-2 would be <br />required to reduce vibration impacts to a less than significant level. However, the Modified Project would include a <br />smaller parking structure with 13,300 square feet less of subterranean parking. Therefore, no additional vibration <br />related to ground excavation for the parking structure would result; and overall, no new or greater impacts related to <br />vibration would occur from implementation of the Modified Project. <br /> <br />Operation Interior Onsite Noise: Consistent with the conditions of the Original Project traffic along the roadways near the <br />Project site would generate noise that could exceed interior noise standards within some of the proposed residential <br />units. Thus, like the Original Project, Mitigation Measure NOI-1 would be required to ensure that the appropriate <br />windows and doors are installed, which would reduce impacts to a less than significant level. No new or greater <br />impacts related to interior noise would occur from implementation of the Modified Project. <br /> <br />Traffic Generated Noise: As described in Section 3.11, Transportation and Traffic, of this document, the Modified <br />Project is estimated to generate 79 fewer a.m. peak hour trips, 96 fewer p.m. peak hour trips, and 1,186 fewer daily <br />trips than the Original Project. The reduction of vehicular trips would also reduce traffic-related noise. Thus, consistent <br />with the Original Project traffic related noise impacts would be less than significant; because fewer vehicular trips <br />would be generated, no new or greater impacts related to traffic noise would occur from implementation of the <br />Modified Project. <br /> Project Generated Operational Noise: To evaluate the potential noise impacts from operation of the Modified <br />Project, a Focused Noise Assessment (included as Attachment A) was prepared. This Focused Noise Assessment <br />calculates the potential operational noise levels due to the Project’s stationary noise sources including: roof-top air <br />conditioning units, trash enclosure activity, pad-mounted transformers, parking lot vehicle movements, outdoor <br />courtyard activity, outdoor pool/spa activity, and parking structure activities, at seven off-site receiver locations <br />adjacent to the Project site. To estimate the Project operational noise impacts, the Focused Noise Assessment used <br />reference noise level measurements from similar types of activities, which are provided in Table N-1. <br /> <br /> <br />2-158