COLE is a leader in the identification, quantification and remediation of Inflow & Infiltration (I & I). Through the use of state of the art flow & rainfall monitoring, smoke & dye testing and modelling, we are able to determine the location of I & I sources and accurately estimate their contribution and impact on both local and trunk sanitary sewers systems.
Collecting reliable and uninterrupted monitoring data is a cornerstone of our data analysis at COLE and key to understanding the state of the sewer system. We accomplish this by using telemetry on all of our units to deliver the data to a secured server for review by COLE staff and client staff as required. This allows for one of our multiple sets of fully qualified field crews to address any issues soon after they occur. In addition, our experience in the installation and maintenance of flow and rainfall monitoring equipment ensures that when large storm events occur our equipment will be prepared to capture all of the data.
Once the flow and rainfall data has been analysed and an area has been identified as having a significant I & I response, source identification can begin. This is typically done with smoke & dye testing and resident surveys. In the past few years our crews have helped to identify several hundred I & I sources that have allowed municipalities to significantly reduce wet weather flow within their system. All teams are equipped with tablets that capture data on a lot by lot basis and store the data online immediately for review by our project managers.
With high quality flow and rainfall information and knowledge of the location and type of I & I source a very detailed model can be prepared and calibrated with high confidence that what is being predicted is likely happening in the field. This allows for a thorough understanding of the system as well as the impacts of proposed remediation measures.