In article , mstrspy says...

I have one of those neighbors. Couple of weeks ago I posted here about
an old abandoned sepic tank caving in. I filled it with bolders,
stones and sand. It is solid so no one will fall in. My neighbor told
me that I should have called clean harbor an have it removed at a huge
cost. The truth is that there is nothing to remove. The steel tank has
disintegrated. There has been no sewage in this tank for over 60
years. Why is this considered a health hazzard? If I try to sell my
house my neighbor will probably mention it to any prospective buyer
(or the person who eventually buys it). I'm not sure how he found out
about it. By the way, I live in New Hampsire. Not sure what the laws
are regarding this.

Then find out what the laws and ordinances are. You might actually be OK. Then
you can educate your neighbor, and that will be the end of it.

Otherwise, fix it. It would have to be disclosed anyway, in NH?

Banty