This incident. Reporter the long delay in shutting down the gas was a critical factor in the mass destruction of san bruno and suggests that shutoff valves are inadequate, even for this much smaller line, just 12 inches, line 118b. Now, with the fire out, officials at fresno fire are monitoring the atmosphere and other conditions there to make sure that nothing spreads in terms of grass fires and that all of the air is clear and safe. Thats the latest that we know right now. Tom, can you put that number in perspective for us, how long it took hem to shut it off . What would be a good number . Reporter well, i mean, if you have shutoff valves that are close by, that could be within seconds or certainly within minutes. The problem is sometimes these valves are miles apart. So imagine having a 12inch line, let alone a 30inch line thats got hundreds of pounds pressure per square inch over miles. Once that line is ruptured, what happens . That gas has to vent to the lower pressure atmospher
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