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Dozers <br />77-90 <br />85 <br />Scrapers <br />83-91 <br />87 <br />Haul Trucks <br />83-94 <br />88 <br />Cranes <br />79-86 <br />82 <br />Portable Generators <br />71-87 <br />80 <br />Rollers <br />75-82 <br />80 <br />Tractors <br />77-82 <br />80 <br />Front -End Loaders <br />77-90 <br />86 <br />Hydraulic Backhoe <br />81-90 <br />86 <br />Hydraulic Excavators <br />81-90 <br />86 <br />Graders <br />79-89 <br />86 <br />Air Compressors <br />76-89 <br />86 <br />Trucks <br />81-87 <br />86 <br />The existing school adjacent to and north of the site as well as the multi -family developments east, <br />south (The Enclave), southwest (Avenue of the Arts) and west of the project may be temporarily <br />affected by short-term noise impacts associated with project construction activities including workers <br />commuting to the site, delivery of construction materials, demolition, ground clearing, excavation, <br />grading, and building activities. However, construction noise would be acoustically dispersed <br />throughout the project site and not concentrated in one area near surrounding sensitive uses. The <br />City's Noise Ordinance does not establish quantitative construction noise standards. Rather, the Noise <br />Ordinance establishes allowable hours of construction. Section 18-314 of the Santa Ana Municipal <br />Code exempts noise associated with construction, repair, remodeling, or grading of any real property <br />from the noise limitations of the Municipal Code, provided that construction activities do not take place <br />between the hours of 8:00 PM and 7:00 AM on weekdays, including Saturday, or any time on Sunday <br />or federal holidays. All project construction activities would be required to comply with the Santa Ana <br />Municipal Code Section 18-314. <br />A likely worst -case construction noise scenario was calculated using the Federal Highway <br />Administration's Roadway Construction Noise Model (RCNM). The construction equipment used was <br />based on the project's Air Quality and Greenhouse Gas Impact Analysis default construction equipment <br />list that is identified in the CalEEMod modeling (Ganddini Group, Inc., 2019). <br />Demolition <br />The noise modeling for the demolition activities included the use of two (2) dozers, three (3) excavators, <br />and a concrete saw all operating between 15 and 200 feet from the northern property line. The existing <br />concrete wall along the project's eastern boundary and the wall along the northern property line of the <br />multi -family development (The Enclave) south of Sunflower Avenue would provide 5 dB of noise <br />reduction, which was accounted for in the noise modeling. The noise levels at the adjacent surrounding <br />noise sensitive land uses during project demolition are shown in Table 12. <br />Legacy Sunflower Apartments Page 67 <br />Mitigated Negative Declaration — March 14, 2019 <br />