Screen trap performance with depth measurements of FOG and solids
https://atomic-wiki.win/index.php/Partnering_with_a_Grease_Trap_Company:_Daily_Preparedness_and_Regulatory_Compliance_for_Food_Services_62183
Display trap efficiency with depth measurements of FOG and solids, setting off pump-outs at 25% capability to maintain efficiency, avoid foul odors, and satisfy most municipal pretreatment standards.