re: Ann: High Grade Gold Intersected at Elain... saw this para...

re: Ann: High Grade Gold Intersected at Elain... saw this para on wikipedia (re uranium mining)

suppose it's OK now re: high levels

"Since that time, ventilation and other measures have been used to reduce radon levels in most affected mines that continue to operate. In recent years, the average annual exposure of uranium miners has fallen to levels similar to the concentrations inhaled in some homes. This has reduced the risk of occupationally induced cancer from radon, although it still remains an issue both for those who are currently employed in affected mines and for those who have been employed in the past.[28] The power to detect any excess risks in miners nowadays is likely to be small, exposures being much smaller than in the early years of mining.[29]"

end

cheers (ex holder - but about to jump back!)