I've got 6 power poles on my property and every few years the county contracts with a tree company to come out and trim the trees and vines around the lines and poles. It's a huge company with over 2,000 employees across several states (Trees Inc).

There were four trucks and 10 employees on my property over the last two days. I took the foreman around on the Ranger to show him where the lines were, where he could and couldn't go and specifically pointed out the septic and leach fields. I said "Stay on this side of the tree and you'll be fine." I told two more people that this morning as one was about to drive right on top of it.

Long story longer, today when I came back from an errand I watched a MASSIVE truck with a chipper behind it driving all over the leach field and coming within 5' of the actual concrete pad and tank.

They were backing out and promptly left the property as they were done. The foreman texted me saying "We're all done, thank you!" I wrote back saying "Man, your boys were driving all over my leach field and came within 5' of the tank!" He replied "Sorry, I'll tell them to be more careful next time."

What I know about leach fields could be written on a matchbook with a grease pencil but I know you're not supposed to drive heavy equipment on it. There doesn't appear to be any visible damage to it but I don't know for sure that the drain lines beneath aren't collapsed now. There are shallow ruts where the big ass truck was driving around and I took pics so you can clearly see he was on the field.
I want to call the company and complain but I don't know what I should be asking for. Should I ask them to pay for an inspection of the field? Or should I just let it go and assume everything's ok?