Eric in North TX wrote:
On Jun 19, 9:45 am, "John D99" wrote:
I've got a standard concrete septic tank setup. I recently dug down
about 10 - 12 inchs to uncover the two inspection / maintenance
holes, whcih are about 20 inches in diameter.

My question: is there any problem in not re-filling the holes so I
can have easy access next time I want to check the tank to see if
it needs a pump-out?

Can I expect a lot of odor in the hot months if I don't cover the
thing with dirt?

I would just fill it with sand, that way you could easily dig it out
if you need access, without the potential for odor and liability.
Liability might take the form of a curious child (we lost one locally
to an uncovered septic tank), or someone falling due to the hole in
the yard.

Brick around the tank lids up to just under the soil level. Keep the
original lids in place and add a precast sidewalk slab as a new lid over the
bricked up opening. Cover with some loose soil untill you need access again.