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LAIN OFFICE OF KARA E. GRANT <br />RK15528 <br />Page 6 <br />3. Any vibration impacts to the adjacent office building as a result of the car wash <br />tunnel and its mechanical equipment need to be evaluated. It appears from the <br />proposed site plan there is very little space between the car wash tunnel and the <br />adjacent building. Therefore a vibration impact assessment needs to be determined <br />before the project is approved. <br />4. No construction noise impact was included in the staff report. As a result of the <br />proximity of the proposed site to the adjoining buildings a CEQA assessment of the <br />potential noise and vibration impacts and mitigation measures needs to be <br />determined before any approval is given for the construction on the site. Again this <br />is a typical requirement for any construction project located in close proximity to <br />other sensitive land uses. <br />CONCLUSIONS <br />RK Engineering Group, Inc. has reviewed the proposed 301 and 325 North Tustin Avenue, <br />Santa Ana Project (CUP 2019-30 and CUP 2019-31) from a TrafficiTransportation Study <br />and Noise/Vibration standpoint. Based upon our review there are a number of items that <br />need to be resolved before the project can be considered complete. This would include an <br />updated traffic analysis with newer traffic counts, a Saturday peak hour analysis use of the <br />latest ITE Trip Generation data, verification of the project traffic contribution to each of the <br />study area intersections, the review of a more realistic study opening year timeframe and <br />the need to provide a technical noise/vibration study in advance of approval of the <br />entitlement for the project. This is necessary to insure that any required mitigation <br />measures are feasible before the project is approved. <br />RK Engineering Group, Inc. appreciates the opportunity to work with the Law Offices of <br />Kara E. Grant on this project.. <br />If you have any questions regarding our review or need further information please call me <br />at (949) 474-0809. <br />Sincerely, <br />Robert Kahn <br />RK ENGINEERING GROUP. INC. <br />V- <br />4.d <br />z No. 0555 rr <br />* Exp, 1431119 <br />OFRFFA <br />r <br />�F <br />engineering <br />group, in C. <br />75A-72 <br />