How to test for broken septic pipe

It's been a few years, but I believe when Verizon ran their fios line they may have come in contact with my drain field feed line....for lack of proper term.

A couple years ago, we had a few evergreen trees die at or near the same time, along with the top of the yard remaining moist longer after a rain.

I thought nothing of the damp lawn since that's where the long driveway drains, and it will somewhat dry out after a few days. But looking at the trees, then the slightly damp area of the lawn, they are all in line with where they trenched with the digging being at the highest part of that imaginary line.

I'm not saying they damaged the line, but it's possible. Is there a way I can test that the dampness is coming from my liquid holding tank and not just the ground not draining as fast?

 

IMO - best way to check it out is to have a camera sent down the pipe to inspect it for damage. Plumbing/septic contractors will likely have the equipment to do this, or you might be able to rent it.

 

First step would be to uncover the D box. This will tell you what may be going on..

Then pump the tank and have the laterals cameraed if issues are found.

Often its just a clog at the D box and effluent is just going down one lateral...

 

I know they use dye to see if septic fields are leaking but I dont know where or what the material is!

 

Thanks for.the replies...actually if it's leaking, then it's about halfway to the drain field.

I have about 150-175' from the holding tank to the drain field.