Thanks to Lahargis for pointing to this article:
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0/09/2005
"Authorities Respond To Missing Chlorine Tank"
http://www.keloland.com/News/NewsDetail5440.cfm?Id=0,43096
10/09/2005
Authorities Respond To Missing Chlorine Tank
"On Friday...we told you about a search going on in O'Brien County...Iowa...for a 150 pound tank of chlorine.
"Thanks to response from the community, authorities say the tank has been recovered in nearby Clay County but the investigation continues."
ARTICLE SNIPPET #2: "The cylinder was taken directly off a feeder line in this well pump house. When it was stolen, the cylinder was holding about 135 pounds of chlorine. Authorities say that's enough to pose a serious health risk."
ARTICLE SNIPPET#3: "Vander Veen says they still don't know if or how much chlorine was taken from the cylinder."
When I was the night operator for the county water & sewer district, I handled Cl all the time- it's nasty stuff.
One of the original WWI poison gases, it's always proved a two-edged sword when tried as a weapon- as likely to harm your guys as the enemy.
It is very deadly if the victim inhales a concentrated dose, but the problem has always been delivery of the stuff. And, being a gas, it dissapates fairly rapidly. That said, in an enclosed space, it's bad stuff.
I wouldn't be terribly worried about it, but it would be nice it they could account for it.