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USEPA RESEARCH ON INFILTRATION/INFLOW CONTROL
Citation:
Lai*, F AND R Field*. USEPA RESEARCH ON INFILTRATION/INFLOW CONTROL. Presented at WEF 2001 Collection Systems Odyssey: Integrating O&M and Wet weather Solutions, Bellevue, WA, 7/8-11/2001.
Description:
From the late 60's to early 80's, the USEPA conducted a series of research, development, and demonsration projects on the characterization, cause and consequence, and control of infiltation/inflow (I/I) in both sanitary and combined sewers. The research effort was driven by the need to support the construction grants program which included the abatement of stormwater I/I that resulted in excess flows to the municipal treatment plant and caused polluted overflows. These research projects focused on I/I detection methdology and instrumentation, preventive installation, structural materials, and construction and corrective techniques. This paper will present the results of past EPA I/I research efforts, many of which significantly advanced the state-of-the-art and assisted the practicing engineering community in sewer system evaluation and rehabilitation, both reactively and proactively. It will address: 1) state-of-the-art problem assessment; 2) pressure sewer systems; 3) polymers to increase sewer carrying capacity; 4) sealing methods and materials for sewer rehabilitation; 5) demonstration and evaluation of Insituform; 6) trenchless sewer installation by the "plowing in" method; 7) house lateral rehabilitation; and 8) impregnated concrete pipe to increase corrosion resistance and strength.