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DEVELOPMENT OF ALTERNATE PERFORMANCE STANDARD FOR RADON RESISTANT CONSTRUCTION BASED ON SHORT-TERM/LONG- TERM INDOOR RADON CONCENTRATIONS - VOLUME 2: APPENDICES
Citation:
Williamson, A., S. McDonough, AND C. Fowler. DEVELOPMENT OF ALTERNATE PERFORMANCE STANDARD FOR RADON RESISTANT CONSTRUCTION BASED ON SHORT-TERM/LONG- TERM INDOOR RADON CONCENTRATIONS - VOLUME 2: APPENDICES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/8-91/210b (NTIS 92-115292), 1991.
Impact/Purpose:
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Description:
The report gives results of a study of short- and long-term variations in radon concentration in about 80 houses in Florida. The study involves comparative sampling using the most common radon measurement technologies during the past year. he study, providing the most detailed database of which we are aware, addresses the time variation of indoor radon concentrations in a significant number of occupied houses having moderately elevated radon concentrations. n these study houses, the degree of variation of radon varies roughly in proportion to the long-term mean concentration, with a coefficient of variation within a calendar quarter of about 25% of the quarterly mean, and a coefficient of variation within a year of about 35% of the annual mean. his pattern of variability supports the use of multiplicative models to fit the variation and to predict intervals of confidence for long-term averages based on short-term measurements. he study indicates a distinct seasonal effect on the average radon, with quarterly averages relative to the annual average increasing in the order of spring (82%) summer (93%) fall (97%) winter (123%). hese models have been used to develop threshold values for the performance criteria of the proposed Building Standard for Radon-resistant Construction for the State of Florida.