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A new standard for investigating indoor air quality problems in residential buildings has been published by ASTM International.

Standard D-7297 contains guidelines for an initial assessment of possible indoor air quality problems and a subsequent three-phase process for finding the sources of any problems, according to the group.

A phase-one walk-through is followed by more extensive, phase-two investigations of airflows in the house, heating and cooling systems, potable water supply and other possible sources of contaminants. The third phase entails detailed measurements of air quality to determine the types of contaminants, including volatile organic compounds (VOC's), pesticides and dust.

Originally known as the American Society for Testing and Materials, ASTM is a voluntary standards development organization.

Standard D-7297 is available from ASTM International at www.astm.org.