Are underdwellings at risk from elevated levels of radon? An examination of radon levels in 201 houses in Hebden Bridge

摘要: Underdwellings are a style of housing found uniquely in Yorkshire. They constructed with the back wall built into ground, and might therefore be at risk or elevated radon concentrations. There approximately 400 such dwellings Calderdale. A survey 201 houses Hebden Bridge was undertaken to determine whether underdwellings risk, gain general indication levels by an examination 'worst case' properties (underdwellings within 20 m geological fault line). Passive detectors were placed for period 2 months (73 underdwellings, 78 control houses, 29 overdwellings 21 'fault' houses). Correction factors dwelling characteristics applied ascertain how much variation unrelated groups. have significantly higher concentrations than group, leading expectation 1% being above action level. Overdwellings had lower concentrations, level linear relationship associated underdwelling. The levels, but these became nonsignificant when correction applied. mean concentration group almost identical NRPB West