Development of Alternate Performance Standard for Radon Resistant ConstructionBased on Short-Term/Long-Term Indoor Radon Concentrations. Volume 1. Technical Report

摘要

The report gives results of a study of short- and long-term variations in radonconcentration in about 80 houses in Florida. The study involves comparative sampling using the most common radon measurement technologies during the past year. The study, addresses the time variation of indoor radon concentrations. 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 variationwithin a year of about 35% of the annual mean. The 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. These 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.