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HEE INDOOR ENVIRONMENTAL ENGINEERING HEE <br />1448 Pine Street, Suite 103 San Francisco, California 94109 <br />Telephone: (415) 567-7700 <br />E-mail: offermannOIEE-SF.com <br />hLtp://www.iee-sf com <br />Date: November 3, 2020 <br />To: Paige Fenney <br />Lozeau I Drury LLP <br />1939 Harrison Street, Suite 150 <br />Oakland, California 94612 <br />From: Francis J. Offermann PE CIH <br />Subject: Indoor Air Quality: Central Point Mixed Use Development Project - Santa, <br />Ana, CA (IEE File Reference: P-4397) <br />Pages: 19 <br />Indoor Air Quality Impacts <br />Indoor air quality (IAQ) directly impacts the comfort and health of building occupants, <br />and the achievement of acceptable IAQ in newly constructed and renovated buildings is a <br />well -recognized design objective. For example, IAQ is addressed by major high- <br />performance building rating systems and building codes (California Building Standards <br />Commission, 2014; USGBC, 2014). Indoor air quality in homes is particularly important <br />because occupants, on average, spend approximately ninety percent of their time indoors <br />with the majority of this time spent at home (EPA, 2011). Some segments of the <br />population that are most susceptible to the effects of poor IAQ, such as the very young <br />and the elderly, occupy their homes almost continuously. Additionally, an increasing <br />number of adults are working from home at least some of the time during the workweek. <br />Indoor air quality also is a serious concern for workers in hotels, offices and other <br />business establishments. <br />The concentrations of many air pollutants often are elevated in homes and other buildings <br />relative to outdoor air because many of the materials and products used indoors contain <br />