Re: Gas pipeline safety- Radon-222 dose vs. holdup in transit??

[NSSIHOU@aol.com]

In todays world, much of the countries natural gas is treated in proximity to 
the point of production to remove the Butane, Propane, Propylene, Ethylene, 
etc. for sale at a far higher value than what natural gas sells for. Many of 
these gases distill in the same temperature range as Radon gas. As a result 
much of the Radon ends up as a constituent in these gas streams. Some 
refiners and producers of polethylene and polypropylene have built storage 
systems such as underground storage caverns specifically to hold these gases 
for at least 30 days to eliminate the Radon problem. Where such storage 
caverns are not available, the decay may take place in the large storage 
tanks at Propane distributors. 

If you locate the EPA document you are seeking, you should keep in mind that 
the Radon may now be much lower than in the 70's. 

And don't be surprised at the levels you find on the Propane storage tanks at 
your local distributor. 
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