Step sludge and residue with a sludge judge to verify pumping requirement

https://yenkee-wiki.win/index.php/Dependable_Septic_Tank_Emptying_and_Installation:_Smart,_Cost-Saving_Techniques

Step sludge and scum with a sludge judge to verify pumping need, then blend contents gently to suspend solids so the vacuum truck removes both layers, avoiding obstructions and early refilling.