to perform video inspection, complete detailed analysis and prepare an emergency evacuation plan in the event of failure. But five years later, the Lorain interceptor failed, and Westlake retained URS Corp. The interceptor had been cleaned and thoroughly inspected at the 40-year mark. Once established, MIC works from the inside out to destroy concrete integrity in as little as a few years. The acid attacks concrete directly, turning it into crumbly calcium sulfate (gypsum). The gas feeds colonies of Thiobacillus bacteria, which excrete sulfuric acid some strains of Thiobacillus can thrive in acid concentrations as high as 7%. Turbulence-combined with organic waste, warm temperatures and oxygen-leads to high concentrations of hydrogen sulfide gas. drops to keep flows moving quickly, which unfortunately creates a great deal of turbulence. In Westlake, the south-north trunk lines dump directly into the interceptor and are constructed with 24-in. Interceptors also are particularly prone to microbiologically induced corrosion (MIC), an insidious plague of concrete sewer systems. “We simply could not allow a problem to develop.” MIC Drop “There are about 70,000 people depending on our system,” Kelly said. The arrangement is efficient and has many advantages, but it has a few weaknesses as well for one thing, a failed interceptor could affect all of Westlake. trunk lines serving the entire city drain northerly into the interceptor. The interceptor in question was built in the 1960s and runs from west to east along Westlake’s northern limits, increasing in size from 36 to 60 in. “It forced the evacuation of several dozen homes for months, and we realized we'd better take a closer look at our system, because we have a similar interceptor arrangement in Westlake, and our pipe is about as old as theirs,” said Westlake Director of Engineering Robert P. The city of Westlake, Ohio, got an interesting ‘wake up call’ in 2006 when a sanitary sewer interceptor line in nearby city of Lorain failed dramatically.

Cccp project safe