Yes,

A FLAME SAFETY LAMP and An EXPLOSIVE METER are paramount
prior to entering any enclosed space not being ventilated.
But I Bet they are both expensive.

You test first with a tube put down into the void
with the explosive meter then go down
with the flame safety lamp lit.
If the flame safety lamp pops there is an explosive atmosphere
if the lamp goes out there is not enough oxygen.
I used to use these in the Navy aboard ships at sea.
Then there's the Red Devil blower to clear it out.
Quite involved if you want to stay alive.

You might take a canary with you in a cage ?





-----Original Message----- 
From: Randall Pratt
Sent: Wednesday, November 10, 2010 3:49 PM
To: psnlist@..............
Subject: Well





Hi,



With all the talk of using a well I just want to remind everyone to be careful of gas in the well.  My extended family history 
includes a father and 2 sons overcome and suffocated by gas while trying to rescue each other during a well repair on the farm. 
The old ladder may be the least of your worries.



Randy

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