radon

Modelling houses as two coupled chambers, namely, the living area and basement, predicts more accurately the total indoor radon source flux from building materials and geology than a one-chamber model in houses with disparate radon concentration

Concentrations of airborne radon ranging from 0.05 to 135 pCi/L were found in houses in Maine. Track-etch cups were placed in five positions for 100 houses to determine integrated average radon concentrations over the period October 1980 - May

The indoor air of 60 residences in and around a Maryland suburb of Washington, DC, was monitored in a pilot study to determine residential radon concentrations. In each residence, a radon grab sample was acquired in the living room, and, if possible, in the basement. Infiltration rates were determined by tracer gas dilution. To help standardize sampling conditions, each home remained closed up for 8 hours prior to sampling and during analysis. Over 60% of the residences sampled showed air infiltration rates below 0.6 air changes per hour.

The expectation of elevated 222Rn levels in modern homes that have low air interchange rates with the outdoor air led to a survey of both conventional and solar homes in northeastern New York State. As a group, homes that are more airtight ha

Two bi-level houses in Gaithersburg, Maryland, USA, of identical design and construction were studied to determine the relationships among air exchange, energy consumption, and indoor pollutants. The experimental house was retrofitted and equip

This literature survey contains references pertaining to the physical properties of radon and its daughters, instrumentation for their measurement, health effects, surveys and measurements, and regulatory information.

Summarises the issues discussed at the Indoor Air '84 conference in Stockholm. The main topics include sick buildings, organic compounds, formaldehyde, combustion products, and radon.

To elucidate any connection between high radon concentrations and low-infiltration houses, the 222Rn concentrations and infiltration rates have been measured concurrently in US houses. Three housing surveys have been undertaken: one in energy-efficient houses located throughout the US and twoin conventional houses in the San Francisco area and in Maryland. In each of the groups surveyed, no clear correlation was observed between 222Rn concentrations and infiltration rate, although each parameter varied over a wide range.

Describes a five month study which measured radon concentration, air exchange (ventilation) rate, weather and radon source parameters in a house near Chicago. Factors influencing radon entry rate were investigated. Discusses the measurements presented, noting some patterns in the data which are hard to explain. Applies two models for radon entry rate to high and low airborne alpha activity at the sump.

Gives basic facts about indoor air pollution for homeowners. Lists common indoor air pollutants and guidelines for generally acceptable levels of selected air contaminants. Some suppliers of measurement equipment are mentioned.