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TECHNICAL MEMORANDUM <br />20341 SW Birch Street | Suite 230 | Newport Beach, CA 92660 | (949) 660-1994 | urbanxroads.com <br />DATE: April 4, 2025 <br />TO: Andres Cuenca, Stake Sports, LLC <br />FROM: Haseeb Qureshi and Alyssa Barnett, Urban Crossroads, Inc. <br />JOB NO: 16467-02 AQ & GHG <br />SUBJECT: WARNER AVENUE FOOTLAB AIR QUALITY AND GREENHOUSE <br />GAS ASSESSMENT <br />Urban Crossroads, Inc. has completed the following air quality and greenhouse gas assessment for <br />the Warner Avenue Footlab (Project), which is located at 400 West Warner Avenue, on the southwest <br />corner of West Warner Avenue and S Birch Street in the City of Santa Ana. <br />PROJECT OVERVIEW <br />It is our understanding that the Project includes the reuse of an existing 57,705 square-foot (SF) <br />industrial building on a 4.99-acre lot as a soccer training facility. <br />SUMMARY OF FINDINGS <br />Results of the assessment indicate that the Project at either site would result in a less than signiffcant <br />impact with respect to air quality and greenhouse gases (GHGs). <br />METHODOLOGY <br />The California Air Pollution Control Oificers Association (CAPCOA) in conjunction with other <br />California air districts, including South Coast Air Quality Management District (SCAQMD), released <br />the California Emission Estimator Model (CalEEMod) 2022 in May 2022. CalEEMod periodically <br />releases updates, as such the latest version available at the time of this report has been utilized in <br />this analysis. The purpose of this model is to calculate construction-source and operational-source <br />criteria pollutant (volatile organic compounds (VOCs), nitrogen oxides (NOX), sulfur oxides (SOX), <br />carbon monoxide (CO), particulate matter 10 microns or less (PM10), and particulate matter 2.5 <br />microns or less (PM2.5)) and GHG emissions from direct and indirect sources; and quantify applicable <br />air quality and GHG reductions achieved from mitigation measures (12). Accordingly, the latest <br />version of CalEEMod has been used for this Project to determine construction and operational air <br />quality and GHG emissions. <br /> <br />