OT exploding septic tank

Heyseed

Member
Well that is what I don't want. I have a lot of very tall weeds (like 5 foot tall) over my tanks, liquid and solid. Is there a danger of the methane in the tanks to ignite/blow up if I burn off the weeds. It is about 60 yards from the house, downhill. We hay that field and the kid mowing has hit the tanks twice in three years, even with a four foot post on each side with surveyors tape. I'm going to build a fence around them and hope that keeps him off them.
 
Only if there is enough oxygen in there to support a flame. Not really sure but I don't think so. I'm going to wait and see what everyone else says.
 
Doubt it. Dad put a steel pipe in under the bathroom for the sink and tub that ran right in to the line for the septic. I took a torch and cut a hole in that so I could drop some inch and a half PVC through it and nothing happened.
 
Perhaps you could spray the weeds or weed eat them.

However to your question: The flammability limits for Methane are 5% lower to 15% higher (percent by volume). Mixtures within this range are explosive, mixtures outside this range are not explosive.

CO2 is heavier than air and is sometimes used as a purge gas when working on fuel tanks etc. Without a purge and measurement you are assuming some level of risk
 
We used to go and help a lady who was in her late 80s at the time and lived in a mobile home. Whenever she would send one of us to go around the back side of the trailer for something she would tell us to be careful of the septic tank because she had heard that a child had fallen into one and drowned. Hers was made of concrete and seemed pretty solid but we always told her we would be careful.
Zach
 
I heard once about a fellow who fell into a septic tank. He yelled, "Fire!". Pretty soon a fire truck drove up and a fireman put a ladder down to the fellow.

After he'd climbed out, the fireman asked him why he'd yelled "Fire" when he fell into a septic tank.

He asked, "Who'd have come and pulled me out if I'd hollered "Sh!t?".

I know it was a serious question, but I couldn't resist it.
 
I don't know about the explosion danger, but I dropped the right rear wheel of my 630 JD through the top of one that I didn't know about in my mother's yard. She had city sewer, and the tank was abandoned before she bought the house. And wouldn't you know that it went in just right to give me and the tractor a nasty high pressure bath. Disgusting situation! I'd avoid driving over one if I knew it's location.
 

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