What is the basis of the VOC criteria used for product certification?
The California Office of Environmental Health Hazard Assessment (OEHHA) has an active program to develop chronic toxicity guidelines for air pollutants. The program uses widely accepted procedures developed by the U.S. EPA and includes extensive peer review and public comment. Only toxicity data are used in the assessment. To date, the program has developed Chronic Reference Exposure Levels (CRELs) for 78 chemical substances, a number of which can be analyzed by the specified methods and are potentially emitted by building products (www.oehha.ca.gov). The CRELs are concentrations that assume long-term exposures and include a number of conservative uncertainty factors. These guidelines provide a strong scientific basis for the FloorScore program. For a product to qualify for certification, its estimated VOC concentrations for classrooms and offices must not exceed one-half the CREL concentrations under the assumption that other products in a building also may be sources of the same comp
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