A survey of indoor radon in saraburi province.

ABSTRACT

A study of indoor radon was carried out on 188 different building in 3 districts (Amphurs Kangkoi, phrabudhabat and Baanmoh) of Saraburi Province in Central Thailand, using an activated charcoal canister for gaseous collection and a gamma spectrometer for analysis of the samples. The survey revealed the presence of radon gas inside al the buildings investigated, ranging in concentrations from 4.00 to 33.66 Bequerels/cubic metre. The safety threshold for indoor radon, according to the U.S.Environmental Protection Agency, is 4 pCi/l (equivalent to 148 Bq.m-3).