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USGS · 70013737

A tentative protocol for measurement of radon availability from the ground

A. B. Tanner
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Abstract

A procedure is being tested in order to determine its suitability for assessing the intrinsic ability of the ground at a particular site to supply radon (222Rn) to a basement structure to be built on the site. The mean migration distance, multiplied by the measured radon concentration gives the "Radon Availability Number' (RAN). Measurements at sites of known indoor radon concentration suggest that RANs below 2 kBq/m2 (5x104 pCi/m2) indicate little chance of elevated indoor radon and RANs above 20 kBq/m2 (5x105 pCi/m2) indicate that elevated indoor radon is likely. The range of uncertainty and the point-to-point and seasonal variations to be expected are under investigation. -from Author

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A. B. Tanner. 1988. A tentative protocol for measurement of radon availability from the ground. https://pubs.usgs.gov/publication/70013737

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USGS1987

Relation of long- and short-term atmospheric sulfur concentrations to sulfate deposition in New York State

Records from 1965-80 indicate an annual decrease of 1.9% in sulfur dioxide emissions upwind of New York, an annual decrease of 1.5% in atmospheric particulate sulfate concentration in New York, and an annual decrease of 2.0% in sulfate-deposition rate in New York. Sulfate-deposition rates in bulk sampling in New York during 1965-80 were approximately 40% of the average sulfur-emission rate for the Northeast. Sulfate-deposition rates in bulk and wetfall collectors were nearly equal and were five times greater than in the dryfall collector. Scavenging ratios for sulfate averaged 8.9 ?? 105; those for sulfate plus sulfur dioxide averaged 4.6 ?? 105. Sulfate concentrations in wet deposition averaged more than twice those estimated from published regional-scale washout equations, whereas those in dry deposition averaged only 22% of those computed from deposition velocities of 0.1 cm/s for sulfate and 1.0 cm/s for sulfur dioxide. Discrepancies in the dryfalls are attributed to inefficiency of dryfall-collection equipment. -from Author

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