NavList:

   

Reply

George-
 While the Broolyn CUNY page is unprofessional, you might want to look at Q 
and S as described again, and I believe you will see where their formula is 
intended to go. They describe S based on the floor space, so as to describe 
how many micrograms of mercury boil into into the cubic atmosphere of the 
room, from the planar surface of the floor. It is very much a similar term of 
micrograms boiled off the planar floor surface, micrograms in the cubice 
volume of the air, and micrograms going out with every air change.
 AFAIK room air changes are described as by the hour in the US, so that air 
flow rate would be cubic meters per hour in a normal environment. Room air 
may change from 1x-6x per hour with the former being a well insulated (aka 
"sick home") space and the latter being a nicely fresh one.

Even the formula they give just doesn't include all the constants they have on 
hand, or need. But there is nearly enough meat on the page to work out the 
rest.

We would need to assume the room is a standard 8 feet (2.6m) in height, as 
that is the standard residential or office ceiling height in the US. Now, we 
have square meters of floor space and cubic meters of air volume meshing.

And the rest becomes a simple exercise left for the reader.

Ah, poor CUNY, this won't do their reputation any good.

   

Reply