Stinky subject
Up in Fremont with a well built septic system, that you have to dig a bit to even find the access cover to the septic tanks, no pumping needed in 16 years so far.
At the shop, system had a grease trap, and the MDEQ dropped in a stab well right behind the drain field to monitor ground water quality. That was a yearly expense for pumping and testing, but the place use to service vehicles and even if they only washed them, needed the extra stuff.
Working at a wastewater facility the past few days
