Louise Power <power_lou...@hotmail.com> wrote:
>You know=2C when I worked at Carlsbad Caverns=2C one of the techs came thro=
>ugh several times a day with a device that sampled the air for radon. There=
> were four separate areas in the Caverns which were monitored--entrance pas=
>sage=2C interior rooms around the Queen's Chamber=2C The Big Room=2C and th=
>e lunchroom and elevator shaft. They all had different levels of radon and =
>employees were scheduled for different areas on a rotating basis=2C and the=
>n had work topside for a week=2C e.g.=2C visitors' center=2C nature walks=
>=2C bat flight talks=2C et al. We had to keep track of our number of hours =
>underground in each location. They were very conscientious of how much rado=
>n we were exposed to. I know there is radon in all or most caves. Correct m=
>e if I'm wrong=2C Don=2C concentration depends a lot on air flow. In some p=
>arts of the country=2C people have detectors in their basements. Considerin=
>g my history of cancer=2C I think I'd give serious consideration to going i=
>nto caves with known high levels.
When did you work at CaCa? When I worked there in 1970-71, I
don't recall that any radon monitoring had yet been started. During the
winter, a draft of cold outside air falls into the lower part of the
entrance, moves down along the floor of the Main Corridor and into the
lower part of the Big Room, then warms and recirculates back outside along
the ceiling. I would expect radon levels to be very low along the tour
route while that cold-trap circulation is going on. Did the people doing
the monitoring say how significant were the levels they found?
--Donald
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