Monitor trap performance with depth measurements of FOG and solids

https://source-wiki.win/index.php/Grease_Trap_Service_Basics:_Keeping_Food_Service_Operations_Clean_and_Code-Compliant_31439

Display trap efficiency with depth measurements of FOG and solids, triggering pump-outs at 25% capacity to maintain efficiency, avoid foul odors, and fulfill most local pretreatment requirements.