More Testing in the Private Property I/I Investigation Saves Money in the Rehab Process-City of Westlake, Ohio
The City of Westlake, Ohio has a program to remove Inflow and Infiltration (I/I) from both their public and private property segments of the sewer system. Specifically, the private property program uses residential dye testing to identify houses that have downspouts that contributes water into the sanitary sewer system. Historically, houses that test positive are scheduled for rehabilitation using a lateral liner from the mainline sewer to the house. A liner is inserted into the sanitary lateral which prohibits any stormwater or groundwater from entering the lateral. During the installation of the liners, it was found that a more detailed testing of the house would have shown that the deficiencies could have been corrected with cheaper, spot repairs or other methods of rehabilitation may have been more effective. The more detailed testing included dye testing as many downspouts as possible on the home being tested, and using two Closed Circuit Television Camera for the inspection The sanitary pipe layout is also identified to provide a more detailed knowledge of how the sanitary and storm pipes cross over each other. The CCTV cameras were installed in both the storm and sanitary sewer and advanced to the lateral of the test house.
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Document Type: Research Article
Publication date: 01 January 2009
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