BACKGROUND: The City of Akron CSO Retention Tank No. 2 is an underground storage tank serving a Combined Sewer Overflow (CSO) system within an industrialized area on the south side of Akron in Ohio.
The project included rehabilitating a large concrete storage tank (180 feet wide, 180 feet long and 30 feet deep or 972,000 cubic feet), buried approximately 8 feet below ground with new maintenance-friendly applications, including lighting. Past efforts to illuminate the underground storage tank failed within months of their initial installation.
CHALLENGE: “During our design process, it is standard practice for the City of Akron to look for innovative products and ideas for our projects that provide a long-term solution, with minimal maintenance. When designing a lighting system for our underground tank, typical lighting systems installed in sewage tanks corrode and quickly fail,” said Michael J Teodecki, Design Division Manager, City of Akron.
They needed a system that would live for the next 30 to 50 years or longer inside what was essentially a sewer. Electrical lighting systems in this particular environment weren’t feasible. A natural lighting system was thought to be a better approach.
“Past efforts to artificially light the space used for temporary storage of sanitary waste were unsuccessful. During frequent rain events, the tank fills with combined sanitary sewage and storm water which led to lighting shortages and ultimate failure of the system. Without lighting, the City’s maintenance forces cannot affectively clean the tank after its use.” R Tony Burgoyne, Project Manager, GPD Group