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Old 09-10-2010, 11:27 AM
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Exclamation Hey Bay Area people, Hope everyones OK!!!

http://news.yahoo.com/s/ap/us_large_explosion

Just saw pictures of this, this morning. Pretty scary. I hope everyone, and your family's are OK!!









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Old 09-10-2010, 11:42 AM
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I saw that, too. Wow, what a blast. I can't imagine what that would have looked like first-hand.
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Old 09-10-2010, 02:00 PM
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Fire burned at 1200 degrees!!

Residents complained about a really bad gas smell weeks ago and gas company investigated but apparently found nothing...obviously, it WASN"T nothing!!!
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Old 09-10-2010, 06:34 PM
Pooka
 
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I don't know anything about this first hand, but based on a lot of years of dealing with this sort of thing....

Natural Gas has no smell. Coming right out of the ground you might smell something, but that would be faint traces of H2S. After the sulfur is knocked out of oil and gas products Natural Gas has NO smell.

So what is it you smell when you 'smell' gas? The chemical that is added to you can smell the gas is called Captan, or sometimes Kaptan, or sometimes Dimethelcaptan. It is added to consumer gas; it is not added to mainline gas, so if the mainline was leaking it is doubtful anyone would smell it.

If PGE could not detect a leak with a gas analyzer then they might have thought it was a freshly paved asphalt street which smells much the same as Captan.

If the gas was leaking in a house near the 24 inch line that blew it is possible that the house blew first and that took out the consumer line which then blew up too close to the 24 inch main line.

All of this is, of course, guesswork on my part. It will likely be two years before everyone knows what took place since that is about how long an investigation like this usually takes.
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Old 09-10-2010, 07:12 PM
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Quote:
Originally Posted by Pooka View Post
The chemical that is added to you can smell the gas is called Captan, or sometimes Kaptan, or sometimes Dimethelcaptan. It is added to consumer gas; it is not added to mainline gas, so if the mainline was leaking it is doubtful anyone would smell it.
How does it get added to the consumer line if it's not already in the mainline?

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