Screen trap performance with depth measurements of FOG and solids

https://sticky-wiki.win/index.php/The_Ultimate_Guide_to_Grease_Trap_Cleaning_for_Commercial_Residences_and_Busy_Kitchens_12557

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