• Clean all problematic areas on at least a quarterly basis. Additionally, the entire system should be cleaned annually. Investigate problem sources to stop/prevent inflow.
• Conduct periodic spot checks to eliminate cross-connections that are tied into sewer systems and can create additional flows.
• Rehabilitate/upgrade pump stations and other facilities in order to accommodate current and future flows. Pump stations should be equipped with redundant equipment such as backup pumps and backup generators as well as providing for emergency overflow storage. “Proactive facility enhancements can greatly reduce the likelihood of potential overflow situations,” said Russell.
• Control inflows and infiltrations (I/I), which can cause overflows and bypasses as well as sewer system deterioration.

In order to reduce and/or eliminate I/I, locate and analyze the potential sources through manhole inspections, smoke testing, cleaning and closed-circuit television inspections, dye testing, and observation of ponding during storms. Once problem areas are identified, corrective actions such as bolting down loose manhole lids and installing moisture barriers can be implemented.

“By conducting regular system inspections, hot spots can be quickly identified and effectively remedied before an unfortunate and costly spill occurs,” concluded Russell.