31B - CUP - 3531 S FAIRVIEW STREET

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1.0 Executive Sumrnar This acoustical analysis and design evaluates the potential noise impacts and necessary mitigation measures for the Sonic Drive-In Project. The project is located at the southeast corner of Fairview Street and MacArthur Boulevard in the City of Santa Ana, as indicated in Exhibit A. The site plan used for this analysis, provided by MCG ARCHITECTS, is presented in Exhibit B. The proposed project would replace an existing restaurant with a 1,536 square foot building and a 456 square foot patio with a menu board, along with approximately 17 drive-up menu boards with speakerphones. The noise regulations for the project site are listed in the Noise Standard section of the study. The noise ordinance relates to "stationary" noise sources as stipulated in Appendix A. A detailed list of required and recommended noise control measures is presented in the Summary of Mitigation Requirements section of this study {also graphically illustrated on Exhibit D). The noise control analysis and recommendations in this study are intended to satisfy the City of Santa Ana Conditions of Approval, with respect to this project. 1.1 Stationary Noise Analysis The stationary noise impacts associated with the proposed project would include noise from the drive-up speakerphones and speakerphones in the patio areas. To approximate the noise levels associated with the proposed project, noise level data from existing Sonic Drive-In restaurants with similar parameters were collected and is presented in Appendix C. The noise levels associated with stationary noise such as speakerphone activities were monitored by RIC. These referenced noise levels can be found in Table 2 and are used as the reference noise levels. To help assess the potential noise impacts of the proposed project, four (4) short-term noise measurements were taken at or near the project site (two (Z) 1-1 31 B-13