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Mr. Bill Apple, Associate Planner City of Santa Ana, Planning Division March 11, 2008 Page 6 An inquiry will also be made to the Natural History Museum of Los Angeles County to determine the presence of known paleontological resources and will be supplemented by map research to determine the potential for underlying geologic units to support significant paleontological resources. The results of the archaeological and paleontological records searches, coordination with the NAHC, and site visit will be incorporated into the pertinent sections of the EIR; this proposal does not include preparation of separate/stand-alone archaeological or paleontological resources technical studies. b. Air Quality The project site is located within the South Coast Air Basin and the jurisdiction of the South Coast Air Quality Management District (SCAQMD). Therefore, the air quality analysis for the proposed project will be conducted according to SCAQMD's Guidelines, SCAQMD CEQA Air Quality Handbook, November 1993, and the guidelines available on SCAQMD's website to minimize comments from SCAQMD. URS will review all pertinent project data provided by the City to assess air quality impacts associated with the construction and operation of the proposed project. The air quality analysis would consist of quantifying criteria pollutant emissions generated from the construction and operational activities associated with the proposed project. Construction and operational emissions will be quantified using project -specific data, the URBEMIS2007 model, and pertinent data from the SCAQMD's website. Construction emissions will be quantified based on available project data such as construction equipment, timeline, and soil movement. Assumptions will be made for any missing pertinent project data such as construction equipment the number of workers used to construct the proposed project. Operational emissions are anticipated to be primarily from vehicles entering and exiting the project site. As such, URS will utilize traffic data from the technical traffic report prepared for this project as input parameters into the URBEMIS 2007 model to estimate mobile emissions. Stationary source emissions (i.e. landscaping) will be quantified based on the project description. Total construction and operational emissions would then be compared to the applicable significance emission thresholds created by the SCAQMD, as provided on their web site to determine whether the project would have a significant impact on air quality. If the analysis shows that there would be significant air quality impacts, then feasible and applicable mitigation measures would be recommended to reduce air quality impacts to a level considered less than significant or to the maximum extent possible. Upon completion of the air quality model run, URS will prepare a draft technical memorandum summarizing the methods and data used, and the results with the model runs attached as an appendix to the project EIR. Note that this scope of work and cost estimated does not include preparation of a focused air quality technical report, a detailed greenhouse gas analysis, or any other type of air quality impacts (e.g. health risk assessment, toxic air contaminants) associated with the development and operation of the proposed project.