posted on Jun, 17 2010 @ 07:07 PM
reply to post by drkid
Benzene concentrations in the region of 1,000 parts per billion!
By my reckoning, that is 1 part per million
(which is the accepted scale for occupational hazard testing).
While I'm not saying concentrations of that level couldn't have some health effects over a very long period of exposure, within my line of work,
where Benzene exposure is fairly common, the chemical specific regulations allow for two different exposure limits;
TWA 1 part per million (Time Weighted Average, essentially the concentration in which it is safe to work 8 hours a day every day throughout your
STEL 5 parts per million (Short Term Exposure Limit, the concentration at which you should not be exposed for more than 15 minutes at a time)
So, flicking back into the sensationalist parts per billion scale, anything in the region of 1,000 ppb is nothing to worry about, whilst anything
approaching 5,000 ppb is worrying.
Over-egging the pudding again AJ.
[edit on 17/6/10 by cheesyleps]