After years of apparent trouble-free service, aging sludge collector mechanisms run the risk of catastrophic failure due to unobserved wear and incremental degradation. When failure occurs, even a temporary repair requires unbudgeted costs associated with extended downtime and government fines, not to mention availability of parts and challenges associated with labor. Plan for maintenance and correctly restore system reliability through Brentwood’s Polychem Solutions Tank Evaluation Program, established to assess the remaining life of chain and flight systems and components through proprietary tools, data collection, software, and 40 years of expertise in rectangular clarifier equipment.