Monitor trap performance with depth measurements of FOG and solids

https://wiki-nest.win/index.php/The_Ultimate_Guide_to_Grease_Trap_Cleaning_for_Commercial_Characteristics_and_Busy_Kitchens_94159

Screen trap efficiency with depth measurements of FOG and solids, triggering pump-outs at 25% capacity to maintain performance, prevent nasty odors, and satisfy most municipal pretreatment standards.