2011-022 - Addendum to the FInal Environmental Impact Report No. 2004-02

Home Browse Search

MacArthur Project Modification — Santa Ana - Air Quality Assessment KPC Environmental, Inc. 1.0 Introduction 1.1 Project Description and Location The proposed project is a modification to a previously approved project with the applicant proposing modifications to the low -rise condominium component and the parking structure. The approved project included a 5 and 6 story condominium component with a total of 276 residential units and a 2 -story parking structure with one subterranean level and one above - ground level with a total parking capacity of 665 vehicles. The proposed amendment will increase the number of residential units to 300 while maintaining the overall footprint and square footage of the approved project. The approved project parking structure will be modified as a 6 -level structure with one subterranean level and live above - ground levels for a total parking capacity of 660 vehicles. The roof area of the parking structure will be developed for recreational uses. The project site is located at Main and MacArthur Blvd. in the incorporated area of the City of Santa Ana, Orange County, California. The site is located in an air quality region known as the South Coast Air Basin (SCAB) under the jurisdiction of the South Coast Air Quality Management District (SCAQMD) for air quality administration. This assessment includes various phasing in the construction of the proposed project modification to the parking structure which includes: mass grading /excavation, trenching & foundation work, building construction, architectural coatings, and existing and future estimated area, operational, and green house gas (GHG) emissions associated with the proposed modified project. Because the proposed modification to the condominium component will not increase the footprint or total square footage of the approved project no assessment was completed as the construction and anticipated emissions were reviewed and reported in the Air Quality Analysis completed by Giroux & Associates, dated November 11, 2004. Assessment of the modification to the parking structure does not include demolition as this phase was completed during the construction of various components of the existing approved project site. 2.0 Air Assessment Description This assessment is based on guidance contained in the South Coast Air Quality Management Districts CEQA Air Quality Handbook, CARB's Preliminary Draft Report on Recommended Approaches for Setting Interim Significance Thresholds for GHG under CEQA, the Bay Area AQMD (BAAQMD), GHG Plan Level Quantification Guidance, and acceptable environmental practices. Modeling programs including Urban Emissions Model, (URBEMIS 2007, 9.2.4); emissions inventory program, Emfac; and dispersion model, CALINE 4 were utilized to determine the projects air quality impacts on the environment. 02/02/11