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Metropolitan Council Grant Proposal <br />1996 I/I Investigation Project <br />City of Little Canada <br />Project Description <br />The City of Little Canada proposes to investigate <br />infiltration /inflow (I /I) in their sanitary sewer system with the <br />assistance of a Grant Program for I/I offered by the Metropolitan <br />Council. The City's proposal is to investigate portions of two <br />sewer districts which were identified to have high I/I based on a <br />1983 study. These areas in district 3 and 4 are some of the oldest <br />residential areas of Little Canada which received sewer service in <br />the early 1960's. <br />This project will investigate all manholes, clean and inspect all <br />sewer lines and inspect all homes for sump pumps in the two <br />designated areas of Sewer Districts 3 and 4. Please refer to the <br />enclosed map. These areas flow into a 15 -inch trunk sewer which <br />connects to the Metropolitan system at the Old Lake Gervais Lift <br />Station into the Lake Gervais Interceptor. <br />Sanitary sewer bypasses are not a problem in the Little Canada <br />sewer system. <br />Scope <br />The project scope will involve 6 tasks to complete a thorough <br />inspection of I/I sources in the designated study areas. The <br />project tasks are as follows. <br />1) Send Notices to All Residents - City staff will prepare and mail <br />letters to all residents in the study area. Letters will explain <br />sewer system inspection efforts leading up to an inspection of <br />homes for sump pumps connected to the sanitary sewer system. <br />2) Inspection of All Manholes - City Public Works will inspect all <br />manholes in the study area using a standardized I/I inspection <br />form. <br />3) Clean Sewer Lines - City Public Works will clean in preparation <br />for TV inspection. <br />4) TV Inspection of Sewer Lines - City will contract with a TV <br />inspection firm selected from a cost comparison of three qualified <br />bidders. Selected firm will inspect sewers and provide a TV <br />inspection report documenting all I/I problems and defects. <br />5) Sump Pump Investigation - Inspection contractor will investigate <br />all homes in the study area for sump pumps. A notice will be sent <br />to all residents prior to the inspections. <br />Page 43 <br />