Fix one problem and unmask another. That was the sequence by which engineers of the Metropolitan Sewer District of Greater Cincinnati discovered an egregious odor problem in an interceptor line. The solution to the problems surprised district engineers.
The problems were in a 54-inch reinforced concrete pipe. Quite a lot of water infiltrated the line after a hole developed over time. When the hole was located and repaired, the water level fell and the flow of water slowed. That’s when something else was detected: the rotten-egg stink of hydrogen sulfide.“We inadvertently created an odor problem,” says Andy Mackowiak, a business analyst
