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particleboard. These materials are commonly used in building construction for flooring, <br />cabinetry, baseboards, window shades, interior doors, and window and door trims. <br />In January 2009, the California Air Resources Board (CARE) adopted an airborne toxics <br />control measure (ATCM) to reduce formaldehyde emissions from composite wood <br />products, including hardwood plywood, particleboard, medium density fiberboard, and <br />also furniture and other finished products made with these wood products (California Air <br />Resources Board 2009). While this formaldehyde ATCM has resulted in reduced <br />emissions from composite wood products sold in California, they do not preclude that <br />homes built with composite wood products meeting the CARB ATCM will have indoor <br />formaldehyde concentrations below cancer and non -cancer exposure guidelines. <br />A follow up study to the California New Home Study (CNHS) was conducted in 2016- <br />2018 (Singer et. al., 2019), and found that the median indoor formaldehyde in new homes <br />built after 2009 with CARB Phase 2 Formaldehyde ATCM materials had lower indoor <br />formaldehyde concentrations, with a median indoor concentrations of 22.4 µg/m3 (18.2 <br />ppb) as compared to a median of 36 µg/m3 found in the 2007 CNHS. Unlike in the CNHS <br />study where formaldehyde concentrations were measured with pumped DNPH samplers, <br />the formaldehyde concentrations in the HENGH study were measured with passive <br />samplers, which were estimated to under -measure the true indoor formaldehyde <br />concentrations by approximately 7.5%. Applying this correction to the HENGH indoor <br />formaldehyde concentrations results in a median indoor concentration of 24.1 µg/m3, <br />which is 33% lower than the 36 µg/m3 found in the 2007 CNHS. <br />Thus, while new homes built after the 2009 CARB formaldehyde ATCM have a 33% <br />lower median indoor formaldehyde concentration and cancer risk, the median lifetime <br />cancer risk is still 120 per million for homes built with CARB compliant composite wood <br />products. This median lifetime cancer risk is more than 12 times the OEHHA 10 in a <br />million cancer risk threshold (OEHHA, 2017a). <br />With respect to Central Point Mixed Use Development Project - Santa, Ana, CA, the <br />buildings consist of multi -family residential buildings. <br />3of19 <br />