How to decommission septic tank

My house has been connected to the sewer for many years. I would like to put an above ground pool in the back yard, but there is an old septic tank there and I'm concerned that it could collapse under the weight. What is the proper way to decommission the tank and about how much would that cost? Getting a large truck to the tank is not a problem.
Thanks Dante
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Dante M. Catoni wrote:

Just have a back hoe come in, remove the lid, then fill it with gravel and relandscape the area.
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wrote:

He may not need a back hoe. Septic tank servicers routinely gain access to the tank by using a big pry bar. Sand will do the same as gravel and is easier to work with. Red
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wrote:

Yes, and when you are ready to apply leverage to the bar, strike the top of the tank next to the plug with a 8# hammer. Not hard, though. You just want it to pop the conical plug out of its seal and break dirt and crud loose. Repeat as necessary, but never do it hard, or you could fracture the top and have more problems. Sand or gravel? I'd use cheapest. They will both do fine.
MHO
Steve
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