2009-034 (2) - Final Supplemental Environmental Impact Report for Fairhaven/Lincoln

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S. Environmental Analysis 5.1 AIR QUALITY This section of the Draft SEIR evaluates the potential for the Fairhaven /Lincoln and Santa Clara /Lincoln intersection Modifications project to impact air quality in the local and regional context. Although the potential project impacts are compared to the project approved in the Santa Ana Second plain Tracy EIR (2002), this Draft S EIR also analyzes impacts related to greenhouse gases, which were not arddressed in the 2092 EiR. Further, although the S E I R compares the project's impacts to those in the 2002 EIR, the ecisting ambient air quality was also studied and documented to provide an accurate and complete representation of the surrounding environment. The analysis in this section is partially based on the following documents: • Traffic Impact Study Santa Ana Second Main Track Updated Draft Deport, DiVIJM Harris, 2008, March. Santa Ana Second Main Tracy Project Environmental Impact Report. State Clearinghouse No, 2009991 065. Prepared for Southern California Regional Rail Authority SCRRA . Prepared by Myra L. Frank and Associates, Inc, 2002, February. Air quality modeling data sheets used in this analysis are included as Appendix C. 5. 1.1 Impacts Identified in the Santa Ana Second Main Track EIR (2002) The 2992 EIR analyzed all environmental checklist items in the CEQA Guidelines related to construction and operational air quality impacts. The impact analysis ire the 2002 EIR was based on the South coast Air {duality Management District's A MD CE QA Air Quality Handbook methodologies using the URBEMIS2002, EMFAC2002, and CALINE4 computer models. The project analyzed in the 2992 EIR has been completely constructed. Revisions to the project do not result in impacts related to train activity on the main line tracks, therefore, air quality impacts related to train activities that were identified 2092 EIR are not analyzed in this Graft SEiR. The 2992 EIR found that construction activities would result in increased air pollutant emissions from construction equipment exhaust and fugitive dust generated during ground- disturbing activities. The air pollutant emissions generated during the construction phases were not found to exceed the SAMD construction thresholds. odors generated from diesel fuel were found to be reduced by use of low sulfur diesel fuel and would be temporary in nature, consequently, no significant construction - related air quality impacts were identified. However, [litigation Measures Air duality -1 through Air ,duality -4 were included to comply with SAQMD regulations for fugitive dust control. The 2002 EIR analyzed impacts from operation and found that the project would improve vehicular traffic flow at at -grade rail crossings. As a result, the original project would result in an overall net reduction in air pollutant emissions and health risk. No significant operational phase air quality impacts were identified. 5.1.2 Environmental Seffing South Coast Air Basin The project site iies within the South Coast Air Basin (So AB ), which includes al of Orange County and the nondesert portions of Los Angeles, Riverside, and San Bernardino counties. The air basin is in a coastal plain with connecting broad valleys and lover hills and is bounded by the Pacific Ocean in the southwest quadrant, with high mountains forming the remainder of the perimeter, The general region lies in the se rn iperm anent Nigh- pressure zone of the eastern Pacific. As a result, the climate is mild, tern pered by cool FairhavenlLincoln and Santa ClaralLincoln Interjection 11 or i i`c- o .r City of Santa Ana a Page 5. 1 -1 Supplement to the Santa Ana Second lira Track Project EIR Resolution No. 2009 -034 Page 51 of 130