I'm going to be measuring the scum and sludge layers in my tank this weekend following the instructions here, http://www.co.thurston.wa.us/health/...stBrochure.pdf
My tank as a pre-treatment tank before the aeration tank. Should I take my measurements in the pre-treatment tank or the main aeration tank? I'm thinking the aeration tank.
Also, just curious, when they come out to pump this septic system, will they be pumping out both the pre-treatment and aeration tanks? That's what would make sense to me.