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ME INDOOR ENVIRONMENTAL ENGINEERING ME <br />1448 Pine Street, Suite 103 San Francisco, California 94109 <br />Telephone: (415) 567-7700 <br />E-mail: offermannaJEE-SF.com <br />hqp://www.iec-sf. com <br />Date: September 23, 2023 <br />To: Marjan Kris Abubo <br />Lozeau I Drury LLP <br /> <br />Oakland, California 94612 <br />From: Francis J. Offermann PE CIH <br />Subject: Indoor Air Quality: Cabrillo Town Center Project, Santa Ana, CA <br />IEE File Reference: P-4753) <br />Pages: 19 <br />Indoor Air Quality Impacts <br />Indoor air quality (IAQ) directly impacts the comfort and health of building occupants, and <br />the achievement of acceptable IAQ in newly constructed and renovated buildings is a well - <br />recognized design objective. For example, IAQ is addressed by major high-performance <br />building rating systems and building codes (California Building Standards Commission, <br />2014; USGBC, 2014). Indoor air quality in homes is particularly important because <br />occupants, on average, spend approximately ninety percent of their time indoors with the <br />majority of this time spent at home (EPA, 2011). Some segments of the population that are <br />most susceptible to the effects of poor IAQ, such as the very young and the elderly, occupy <br />their homes almost continuously. Additionally, an increasing number of adults are working <br />from home at least some of the time during the workweek. Indoor air quality also is a <br />serious concern for workers in hotels, offices and other business establishments. <br />The concentrations of many air pollutants often are elevated in homes and other buildings <br />