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OCTA I Santa Ana/Garden Grove Fixed Guideway Project <br />FNNoise and Vibration Technical Analysis Re-evaluation in Support of Minor Design Modifications <br />• Traffic Signal Priority. Implementation of traffic signal priority at all traffic signals along <br />the route except for Main Street, Broadway, and Bristol Street. <br />Noise and Vibration Analysis Re-evaluation <br />The following describes the sensitive receptor locations analyzed in the context of this analysis, <br />as compared to the previously approved analysis with respect to potential changes to noise and <br />vibration at these locations. <br />Noise Sensitive Areas and Receptor Locations <br />In the prior noise and vibration analysis (2015 EA/EIR), URS identified noise sensitive areas (or <br />NSAs) within the Study Area that could potentially be impacted from the Build Alternatives. The <br />NSA's were defined by identifying noise sensitive land uses - residential, educational, <br />recreation, churches (places of worship), etc. - within the defined screening distance of the <br />project. Within each of these NSAs, URS modeled between one and nine specific receptor <br />locations (e.g., R1, R2). Of the 21 NSAs identified by URS, only 10 are located within the area <br />potentially affected by the currently proposed minor modifications. <br />Table A lists each of the 10 NSA's and the corresponding receptors (e.g., R1, R2) within each <br />NSA, and provides a description of the receptors included within each of the 10 NSAs. Figure 5 <br />from the February 2012 Noise and Vibration Technical Report (URS Corporation), showing the <br />locations of the NSAs and modeled receptors, is provided in Attachment A. <br />Table A: Noise Sensitive Areas and Modeled Receptors Potentially Affected by Proposed <br />Minor Modifications/Engineering Refinement <br />NSA <br />Rec. <br />Description <br />1 <br />R1 <br />Single family residential land use located south of PE ROW at western end of the proposed alignment. <br />R2 <br />There are 14 housing units within NSA -1. <br />R3 <br />Mobile home park located north of W Ilowick Municipal Golf Course and south of PE ROW. There are <br />2 <br />24 mobile homes within the screening distance. Note that a 6 -foot concrete wall was observed between <br />R4 <br />PE ROW and the mobile home park. <br />R5 <br />3 <br />Mobile home park and single family residential land use located north or PE ROW and west of Santa <br />R6 <br />Ana River. There are 68 mobile homes and 1 single family residential unit within NSA -3. <br />R7 <br />4 <br />R8 <br />Spurgeon Intermediate School athletic fields bounded by Fairview St., PE ROW, Santa Ana River, and <br />R9 <br />5th St. There are no structures within 350 feet from the proposed alignment. <br />5 <br />R11 <br />Small Wonders Children's Center, Templo Calvario Assembly of God, and Olive Crest Academy <br />located south of PE ROW and east of Fairview St. <br />6 <br />R10 <br />Single family residential land uses located north of PE ROW, east of Fairview St at the end of 7th St. <br />There are 7 housing units within NSA -6. <br />7 <br />R12 <br />Single family residential land uses located north of PE ROW, east of Fairview St at the end of 6th St. <br />There are 4 housing units within NSA -7. <br />8 <br />R13 <br />One (1) single family residential unit within Manufacturing/Industrial Services land use located between <br />5th St and PE ROW, east of Hawley St. <br />NSA -9 includes single family residences and commercial/industrial uses north of the proposed O&M <br />9 <br />R15 <br />Facility between English St. and Fairlawn Ave. There are approximately 20 housing units within NSA -9. <br />Currently, the proposed O&M site is used as the metal recycling facility and is a significant source of <br />noise. <br />3 <br />