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SWA P E Technical Consultation, Data Analysis and <br />Litigation Support for the Environment <br />2656 291h Street, Suite 201 <br />Santa Monica, CA 90405 <br />Matt Hagemann, P.G, C.Hg. <br />(949)887-9013 <br />mhagemann@swape.com <br />Paul E. Rosenfeld, PhD <br />(310)795-2335 <br />prosenfeld@swape.com <br />October 12, 2020 <br />Richard Drury <br />Lozeau I Drury LLP <br />1939 Harrison Street, Suite 150 <br />Oakland, CA 94618 <br />Subject: Comments on 4`h and Mortimer Project (SCH No. 2006071100) <br />Dear Mr. Drury, <br />We have reviewed the October 2020 Environmental Impact Report Addendum ("Addendum") for the 41h <br />and Mortimer Project ("Project") located in the City of Santa Ana ("City"). The Project proposes to <br />demolish two existing buildings as well as construct a 93,117-SF mixed -use residential structure <br />containing 99 apartment units, a 74,986-SF multi -family residential structure containing 70 units, 8,075- <br />SF of leasing/amenity areas, 3,847-SF of restaurant space, 7,514-SF of retail space, and 422 parking <br />spaces on the 2.7-acre site. <br />Our review concludes that the Addendum fails to adequately evaluate the Project's air quality, health <br />risk, and greenhouse gas impacts. As a result, emissions and health risk impacts associated with <br />construction and operation of the proposed Project are underestimated and inadequately addressed. An <br />EIR should be prepared to adequately assess and mitigate the potential air quality, health risk, and <br />greenhouse gas impacts that the project may have on the surrounding environment. <br />Air Quality <br />Unsubstantiated Input Parameters Used to Estimate Project Emissions <br />The Addendum's air quality analysis relies on emissions calculated with CalEEMod.2016.3.2.1 CalEEMod <br />provides recommended default values based on site -specific information, such as land use type, <br />meteorological data, total lot acreage, project type and typical equipment associated with project type. <br />If more specific project information is known, the user can change the default values and input project- <br />1 CAPCOA (November 2017) CalEEMod User's Guide, http://www.aqmd.gov/docs/default- <br />source/ca I eemod/01_use r-39-s-gu id e2016-3-2_15 nove m be r2017. pdf?sfvrsn=4. <br />75C-76 <br />