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particleboard- These materials are commonly used in building construction for flomirg, <br />cabinetry, baseboards, window shades, interior doors, and window and door trims. <br />In January 2009, the California Air Resources Board (GARB) adopted an airborne toxins <br />control measure (ATCM) to reduce formaldehyde emissions from composite wood <br />products, including hardwood plywood, particleboard, medium densityfiberboard, and also <br />furniture and other finished products made with these wood products (California Air <br />Resources Board 2009). While this formaldehyde ATCM has resulted in reduced emissions <br />from composite wood products sold in California, they do not preclude that homes built <br />with composite wood products meeting the CARB ATCM will have indoor formaldehyde <br />concentrations that are below cancer and non -cancer exposure guidelines. <br />A follow up study to the California New Hnme Study (CNHS) was conducted in 2016.2018 <br />(Chan et. al., 2019), and found that the median indoor formaldehyde in new homes mostly <br />(69 of 70) bnilt in 2012 or later with CARB phase 2 Formaldehyde ATCM materials had <br />lower indoor formaldehyde concentrations, with a median indoor concentrations of 22A <br />kg/m' (18.2 ppb) as compared to a median of 36 µg/m' found in the 2007 CNHS. <br />Thus, while new homes built aflerthe 2009 CARB formaldehyde ATCM have a 38% lower <br />median indoor formaldehyde concentration and cancer risk, the median lifetime cancer risk <br />is still 112 per million for homes built with CARB compliant composite wood products, <br />which is more than 11 times the OEHHA 10 in a million cancer risk tbreshold (OEIIHA, <br />2017a). <br />With respect to this project, the buildings i n The Bowery Mixed -Use Project in Santa Ana, <br />CA consist of residential and commercial retail and restaurant apace'_ <br />"fire residential occupants will potentially have continuous exposure (e.g. 24 hours per day, <br />52 weeks per year). These exposures are anticipated to result in significant cancer risks <br />resulting from exposures to formaldehyde released by the building materials and furnishing <br />commonly found in residential construction. <br />3of19 <br />20 <br />21 <br />75C-40 <br />