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Even composite wood products manufactured with CARB certified ultra -low emitting <br />formaldehyde (ULEF) resins do not insure that the indoor air will have concentrations of <br />formaldehyde the meet the OEHHA cancer risks that substantially exceed 10 per million. <br />The permissible emission rates for ULEF composite wood products are only 11-15% lower <br />than the CARB Phase 2 emission rates. Only use of composite wood products made with <br />no -added formaldehyde resins (NAF), such as resins made from soy, polyvinyl acetate, or <br />methylene diisocyanate can insure that the OEHHA cancer risk of 10 per million is met. <br />The following describes a method that should be used, prior to construction in the <br />environmental review under CEQA, for determining whether the indoor concentrations <br />resulting from the formaldehyde emissions of specific building materials/furnishings <br />selected exceed cancer and non -cancer guidelines. Such a design analyses can be used to <br />identify those materials/furnishings prior to the completion of the City's CEQA review and <br />project approval, that have formaldehyde emission rates that contribute to indoor <br />concentrations that exceed cancer and non -cancer guidelines, so that alternative lower <br />emitting materials/furnishings may be selected and/or higher minimum outdoor air <br />ventilation rates can be increased to achieve acceptable indoor concentrations and <br />incorporated as mitigation measures for this project. <br />Pre -Construction Building Material/Furnishing Formaldehyde Emissions Assessment <br />This formaldehyde emissions assessment should be used in the environmental review under <br />CEQA to assess the indoor formaldehyde concentrations from the proposed loading of <br />building materials/furnishings, the area -specific formaldehyde emission rate data for <br />building materials/furnishings, and the design minimum outdoor air ventilation rates. This <br />assessment allows the applicant (and the City) to determine, before the conclusion of the <br />environmental review process and the building materials/furnishings are specified, <br />purchased, and installed, if the total chemical emissions will exceed cancer and non -cancer <br />guidelines, and if so, allow for changes in the selection of specific material/furnishings <br />and/or the design minimum outdoor air ventilations rates such that cancer and non -cancer <br />guidelines are not exceeded. <br />6of19 <br />