Radon gas is now considered to be a health hazard when found in excessive amounts in the builtenvironment. The levels of radon vary greatly, with some geographical areas having very highlevels. In the United Kingdom, Northamptonshire was declared an Affected Area in 1992, and itwas at this stage that our group first started studying radon levels and the steps taken to reducethem.The radon levels both before and after remediation were studied, together with the number ofoccupants of affected rooms, and their pattern of occupation.
Moulds are a health concern. High levels of moulds in a building environment are to be avoided. Some species or high concentrations of mould are a serious health risk, and must be dealt with if we want to maintain healthy indoor environments. Gives New York City remediation guidelines, and lists methods to control mould growth: 1) Repair indoor and outdoor water leaks, 2) Clean and disinfect smooth surfaces, 3) Clean and dry other materials or remove them, 4) Discard porous contaminated materials, 5) Control moisture sources (e.g.
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