Laserfiche WebLink
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 (CARB) 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 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 Home 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) built in 2012 or later with CARB Phase 2 Formaldehyde ATCM materials had <br />lower indoor formaldehyde concentrations, with a median indoor concentrations of 22.4 <br />µg/m3 (18.2 ppb) as compared to a median of 36 µg/m3 found in the 2007 CNHS. <br />Thus, while new homes built after the 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 threshold (OEHHA, <br />2017a). <br />With respect to this project, the buildings in The Bowery Mixed -Use Project in Santa Ana, <br />CA consist of residential and commercial retail and restaurant spaces <br />The 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 />