Monitor trap efficiency with depth measurements of FOG and solids

https://blogfreely.net/daylinrugk/h1-b-how-a-grease-trap-companies-keeps-restaurants-compliant-and-ready-for-r5y1

Screen trap efficiency with depth measurements of FOG and solids, setting off pump-outs at 25% capability to maintain effectiveness, avoid foul odors, and fulfill most community pretreatment requirements.