ARBEvaluationofCompositeWoodProducts.ppt

Outline California Health SafetyCode Requirements § 39657 - Requires ARB to identify toxic air contaminants; identify minimum threshold level § 39658 - Requires ARB to develop Air Toxic Control Measures (ATCMs) § 39660.5 -Requires ARB to assess California’s indoor exposure to toxic air contaminants (TACs) and the relative contribution to total exposure § 39665 - Requires ARB to prepare a report on the need and appropriate degree of regulation § 39666 - For compounds with no threshold level, the HSC requires the development of control measures based on best available control technology, or more effective controls in consideration of costs and risk Why is Formaldehyde a Concern in California? Identified as a TAC by the ARB in 1992 Nasopharyngeal cancer: URF = 6 cases/million people (1 μg/m3 , 70 years exposure) Formaldehyde identified as a HAP by the U.S. EPA B1 cancer classification - probable human carcinogen Nasopharyngeal cancer: URF = 13/million (1 μg/m3 per 70 year exposure) Ranked #1 indoor pollutant for non-cancer effects Classified by IARC as a known human nasopharyngeal carcinogen Acute eye irritation over 94 μg/m3 (1 hr. avg. aREL) Chronic respiratory health problems over 3 μg/m3 (annual avg. cREL) Emissions and Exposure Statewide formaldehyde emissions TPY Mobile sources - 16,185 (77%) Stationary Sources - 2,871 (14%) Area sources - 1,976 (9%) Exposure levels Statewide average ambient - 4.3 μg/m3 Indoor air range - 16 to 290 μg/m3 Why Composite Wood Products? Chronology 2002 Composite Wood Product Survey Particleboard Medium Density Fiberboard Hardwood Plywood Emission Performance of Today’s Resins What are the Sources of FormaldehydeEmissions in California? Best Available Control Technology Evaluation ARB is required by law to reduce emissions through application of BACT or a more effective control method considering what is technologically feasible and cost effective ATCM specific - technolog