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letters to each tribe on City letterhead. Please note that AB 52 Tribal Consultation would not be triggered <br />by preparation of an EIR Addendum. <br />Task 2.5: Noise Study <br />PlaceWorks will prepare a noise and vibration technical analysis to evaluate potential impacts associated <br />with implementation of the proposed project. We will identify potential impacts on sensitive land uses <br />based on relevant standards and criteria for noise exposure, including federal, state, and local ordinances, <br />policies, and standards, such as those identified in Irvine's General Plan Noise Element and Municipal Code. <br />The results of the analysis will be incorporated into the Addendum and modeling data sheets included as <br />an appendix. <br />Existing Noise Conditions. PlaceWorks will identify the nearest sensitive receptors and other environmental <br />characteristics, based on our experience and knowledge of similar noise environments, aerial photography, <br />site plans, and project site photos. Traffic noise is expected to be the dominant ambient noise source in the <br />area, both now and at project buildout. As such, no field measurements of ambient noise levels are <br />proposed, and existing conditions will be described using available noise contours and modeling <br />procedures. <br />Transportation Noise. PlaceWorks will model vehicular traffic noise using a version of the U.S. Federal <br />Highway Administration (FHWA) Traffic Noise Model. The traffic noise analysis will be based on traffic <br />volumes for the analysis scenarios provided by IBI Group. PlaceWorks will identify any substantial noise <br />increases above established criteria and compared to those identified in the Certified EIR. <br />Stationary Noise. PlaceWorks will describe nontransportation stationary and area sources of noise <br />generated by the project. Potential sources of stationary noise include heating, ventilation, and air <br />conditioning systems, delivery and parking lot noise. Future nontransportation noise will be evaluated <br />based on the City's Municipal Code limits and the impacts identified in the Certified EIR. <br />Construction Noise and Vibration. PlaceWorks will evaluate potential construction noise and vibration <br />impacts associated with the project. Noise and vibration effects from construction activities will be <br />discussed in terms of accepted standards from the City's Municipal Code and the Federal Transit <br />Administration (FTA). Impacts of the proposed project will be compared to those identified in the Certified <br />EIR. Mitigation measures to reduce short-term construction noise and vibration impacts from the Certified <br />EIR will be identified. <br />Task 2.6: Shade/Shadow Analysis <br />PlaceWorks will prepare a shade/shadow analysis for inclusion in the addendum. This involves the analysis <br />of the shade and shadow patterns created by the proposed project. This analysis requires that the <br />applicant provides a model of the project that can be imported into SketchUp, if a model cannot be <br />provided or is not available PlaceWorks can create a model if ample project information is provided. The <br />model will be used to analyze shade and shadow patterns created in 1 hour increments from a time period <br />of 8 AM to 8 PM during the winter solstice and summer solstice periods (13 time periods for each solstice). <br />This model will be used to graphically show the proposed project shade and shadow pattern during these <br />times, a compiled exhibit during each solstice will provide the travel of the shadow cast throughout the <br />day. The project modeling will consist of a simple block form model representative of the building footprint <br />and height. <br />25D-21 <br />