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Because these residences will be constructed with CARB Phase 2 Formaldehyde ATCM <br />materials, and be ventilated with the minimum code required amount of outdoor air, the <br />indoor residential formaldehyde concentrations are likely similar to those concentrations <br />observed in residences built with CARB Phase 2 Formaldehyde ATCM materials, which <br />is a median of 25 µg/m3. <br />Assuming that the residential occupants inhale 20 m3 of air per day, the average 70-year <br />lifetime formaldehyde daily dose is 500 µg/day for continuous exposure in the residences. <br />This exposure represents a cancer risk of 125 per million, which is more than 12 times the <br />SCAQMD CEQA cancer risk of 10 per million (SCAQMD, 2015). For occupants that do <br />not have continuous exposure, the cancer risk will be proportionally less but still <br />substantially over the SCAQMD CEQA cancer risk of 10 per million (e.g. for 12/hour/day <br />occupancy, more than 6 times the SCAQMD CEQA cancer risk of 10 per million). <br />This project will also include a hotel and commercial and office buildings and the <br />employees in these buildings are expected to experience work -day exposures (e.g. 40 hours <br />per week, 50 weeks per year). This exposure for employees is anticipated to result in <br />significant cancer risks resulting from exposures to formaldehyde released by the building <br />materials and furnishing commonly found in hotels and commercial and office buildings. <br />Because these hotel and commercial and office buildings will be constructed with CARB <br />Phase 2 Formaldehyde ATCM materials, and be ventilated with the minimum code <br />required amount of outdoor air, the indoor retail building formaldehyde concentrations are <br />likely similar to those concentrations observed in residences built with CARB Phase 2 <br />Formaldehyde ATCM materials, which is a median of 25 µg/m3. <br />Assuming that the employees work 8 hours per day and inhale 20 in of air per day, the <br />formaldehyde dose per work -day at the hotel is 167 µg/day. <br />Assuming that the retail employees work 5 days per week and 50 weeks per year for 45 <br />years (start at age 20 and retire at age 65) the average 70 year lifetime formaldehyde daily <br />dose is 73.6 µg/day. <br />El <br />