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PcKOA CORPORATION <br />PLANNING & ENGINEERING <br />November 19, 2008 <br />Mr. Jay Trevino & Mr. Jim Ross <br />City of Santa Ana — Public Works Agency <br />20 Civic Center Plaza M-21 <br />Santa Ana, California 92702 <br />1120 West La Veta Avenue. Suite 660 <br />Orange. CA 92868 <br />t 714.573.0317 f: 714.573.9534 <br />www.koacorpor;ation.com <br />Subject: EXTRA WORK PROPOSAL for the Addendum for the Draft EIR Metro East Mixed Use <br />Overlay Zone in the City of Santa Ana <br />Dear Mr. Trevino and Mr. Ross: <br />KOA Corporation (KOA) is pleased to provide engineering services to you for the work in the City of Santa <br />Ana. The City has requested additional services that were not in the original Scope of Services. We are <br />most interested in performing the necessary services and submitting this proposal accordingly. This letter <br />presents our cost estimate for the project and requests your written authorization. <br />KOA will prepare the following: <br />■ Additional field review of study intersections for which City of Tustin consultant recommended changes <br />in Synchro model lane geometry. <br />■ Revise Synchro model signal timing to match non-standard signal timing parameters specified by City of <br />Tustin consultant <br />■ Report revisions required for Level of Service tables due to changes in Synchro signal timing parameters. <br />■ Evaluation of the change from the .03 to .01 levels of significance for all impacted intersections. <br />■ A "Traffic Calming Tools" section will be added to the report <br />■ A "Neighborhood Traffic Calming" category and fair share analysis will be added to the fair share cost <br />estimate. <br />i The report will recommend a traffic calming program for systematic mitigation of impacts in the City of <br />Tustin. <br />■ Attend two (2) additional meetings. <br />LOSANGELES OAKLAND ONTARIO ORANGE COUNTY SAN DIEGO <br />