i would assume a combo of methane and whatever other gasses get trapped in the tank, although thats a guess. i have never delt with on farm confined spaces only through my job and i was always kinda nervous going down below street level and always took way too much time to ventilate and purge and always kept my gas meter close by. they had a double fatality in a manhole years b4 i started working at that job and any manhole work was atleast a 2 person operation until recently b4 i left, now they say its ok to go into a confined space with 1 person, thats just asking for trouble imo atleast with 2 people 1 person can call 911 if theres an emergency, while if your alone and something happens it may be awhile b4 someone notices your missing.
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Today's Featured Article - Dad's Old Silver King and Joe Capalco - by Woody E. Diehl. My father, Charles Diehl, grew up in the Elsworth, Ohio area during the Depression on a small working farm. I never saw the place, nor was I around during his early years. What I know about those hard times comes from listening to Dad and his old pals reminisce from time to time. One of the old timers that would sit with Dad and chew the fat about the 'good ole days' was Joe Capalco. Joe wasn't like most of my Dad's friends. He rarely worked that we knew of. Always had plenty of time
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