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Community Plan Exemption Checklist <br />City of Santa Ana Gary Avenue Business Park Project <br /> <br />78 <br />Table N-3: Noise Measurements <br />Site Location Leq <br />(dBA) <br />Lmin <br />(dBA) <br />Lmax <br />(dBA) <br />Time <br />1 Along the east side of East Garry Avenue approximately 500 <br />feet south of Pullman Street <br />64.9 58.5 79.0 12:00 p.m. <br />2 Along the east side of Alton Parkway approximately 700 feet <br />from the intersection of Daimler Street and Alton Parkway <br />66.5 52.2 82.8 12:20 p.m. <br />3 Along the western portion of Duryea Avenue, approximately 500 <br />feet south of SR-55 62.3 57.6 73.9 12:38 p.m. <br />Source: Acoustical Assessment (Appendix K) <br /> <br />Construction <br />Project construction activities for the proposed Project are anticipated to include demolition of the existing <br />three buildings and pavement, site preparation and grading of the Project site, building construction of a <br />new 91,500 square foot light industrial building, paving of onsite driveways, parking lots and truck loading <br />area, and application of architectural coatings. Noise impacts from construction activities associated with the <br />proposed Project would be a function of the noise generated by construction equipment, equipment location <br />sensitivity of nearby land uses, and the timing and duration of the construction activities. The nearest noise <br />sensitive receptors to the Project site are the single-family homes located as near as approximately 2,200 <br />feet north of the Project site. In addition, a dialysis center is located 700 feet to the northeast of the site. <br /> <br />Section 18-314 (Special Provisions) of the City’s Municipal Code specifies that noise sources associated with <br />construction activities are exempt from the City’s established noise standards as long as the activities do not <br />take place between the hours of 8:00 p.m. and 7:00 a.m. on weekdays, including Saturday, or any time on <br />Sunday or a federal holiday. <br /> <br />Construction noise impacts to the nearby sensitive receptors have been calculated as part of the Acoustical <br />Assessment completed for the Project included as Appendix K. Anticipated construction equipment noise <br />emissions are identified below. As shown the highest construction noise would be 66.4 dBA Leq. <br /> <br />Table N-4 Project Construction Noise Levels <br /> <br />Construction Phase Receptor Worst Case <br />Modeled Exterior <br />Noise Level <br />(dBA Leq) <br />Noise <br />Threshold <br />(dBA Leq) <br /> <br />Exceeded? Land Use Direction Distance <br />(feet) <br /> <br />Demolition <br />Commercial Northeast 700 63.5 85 No <br />Residential North 2,200 53.6 80 No <br /> <br />Site Preparation <br />Commercial Northeast 700 64.7 85 No <br />Residential North 2,200 54.8 80 No <br /> <br />Grading <br />Commercial Northeast 700 64.4 85 No <br />Residential North 2,200 54.4 80 No <br />Building Construction Commercial Northeast 700 66.4 85 No <br />Residential North 2,200 56.4 80 No <br /> <br />Paving <br />Commercial Northeast 700 63.6 85 No <br />Residential North 2,200 53.7 80 No <br />Architectural Coating Commercial Northeast 700 50.8 85 No <br />Residential North 2,200 40.8 80 No <br />Source: Acoustical Assessment (Appendix K) <br /> <br />Table N-4 shows that construction noise levels would not exceed the 85/80-dBA threshold and would not <br />exceed the City’s municipal code allowable Lmax. Additionally, compliance with Section 18-314 (Special <br />8/22/2022 <br />Planning Commission 2 – 117