75B - PH - AMEND DEVELOPMENT AGMT 2005-02

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MacArthur Project Modification - Santa Ana - Air Quality Assessment KPC Environmental, Inc. 5.4 CO Hotspot Analysis The proposed project was previously examined for air quality by Giroux & Associates in an assessment dated November 2004 which included CO Hotspot analysis. The Traffic Impact Study dated December 2010 as completed by KOA Corporation indicated that the project with modification will not generate additional significant impact to the study intersections and will not generate adverse effects on the surrounding street system. Since there are no significant traffic effects to the Level of Service (LOS) at the study intersections and the project modifications do not change the current approved property usage no new traffic emission or intersection assessments were made for CO Hotspots. It should be noted however that recent CO Hotspot Modeling in the area performed by KPC on nearby projects using CALINE and EMFAC with current and future worst case traffic conditions indicated that CO Hotspots will not likely occur in the vicinity of the proposed project site. 5.5 Impacts of Area and Operational Emissions The majority of emissions associated with Area and Operational Emissions are generally due to vehicle exhaust emissions. Area and Operational Emissions associated with the project would be below the SCAQMD's significance thresholds for PM10, CO, NOx, ROG, PM2.5 and SOx. As a result regional emissions associated with the combined area and operational emissions for the project would be considered to have a less than significant impact on regional air quality. Operational use of emissions generating equipment will be regulated under the SCAQMD and new sources subject to review prior to use. Permits are required by the SCAQMD prior to construction, installation, or operation unless specifically exempted for all equipment that emits or controls air contaminants. 6.0 Conclusion 6.1 Consistency with the Air Quality Management Plan (AQMP) The proposed project was previously assessed under an existing EIR; this assessment included only modification not contained in the original EIR. The proposed project is in an area covered by a General Plan and designated for the type of land use(s) that the project is proposing and would be covered under the City's General Plan. The City requires that the projects conform to population and traffic forecast contained in the current General Plan. General Plan forecasts for development and traffic are used within the AQMP. The AQMP provides a basis for assessing air quality within the South Coast Air Basin (SCAB) and provides for pollutant control strategies and is used in establishing the State Implementation Plan (SIP). The SIP defines how the SCAB will achieve the federal ambient air quality standards. Because the projects are not predicted to increase the population or traffic conditions beyond what is forecast in the General Plan, regional emissions associated with the project are accounted for within the AQMP and are therefore consistent with the AQMP. 02/02/11 17 75B-125