I'm not sure if it included removal. The old system is at least 60 years old, pretty incredible. I believe its only a single "steel" tank.
I'm guessing a pretty good size backhoe is needed for the amount of excavating that needs done for the tanks and how do they set the tanks, can the hoe do that or are they usually set off the truck when delivered.
I considered (briefly) renting equipment and doing this part myself, now I think I'll just get several quotes, ask a lot of questions and go from there.
Thanks for all the comments and suggestions.
Curt