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City of Roseville <br />March, 2008 <br />as necessary. Manholes located in easements or off paved road areas can be large sources of direct inflow and <br />should be inspected for flooding potential and damaged rings, Sump Pumps are also considered a direct <br />inflow source and they will generate a significant flow spike so a survey in these areas will provide some useful <br />information as well as providing a "complete" inspection. <br />Inflow defects that are identified should be repaired as soon as feasible after identification to reduce the <br />inflow as much and as quickly as possible. This will reduce the MCES treatment charges as well as assist in <br />further evaluation of the system since other defects may become evident when some of the flow is removed. <br />These investigation recommendations are a starting point and problems identified or defects noted may <br />require additional investigation or other unique investigative techniques. The results of each procedure should <br />be reviewed and evaluated to determine the next step in the investigative effort. <br />VIII, Schedule <br />A. 2008 Plan <br />o Insta(I additional flow meters for peak wet weather period to attempt to capture several rainfall <br />events <br />o Calibrate pumps at Dale Street Lift Station (#4), Galtier Lift Station (#5), Cleveland Lift Station <br />(#9), and Fernwood Lift Station (#13). <br />o Evaluate flows from each lift station area and calculate parameters such as those in Table 5. <br />o Smoke test area around Fairview Avenue ,Snelling Avenue, and Hwy 36. <br />o Conduct physical survey of manholes located in "off-road" locations <br />o Complete rehabilitation of any identified manhole inflow sources <br />o Televise a portion of the collection system <br />o Experiment with televising sewer service lines in 10 - 20 locations <br />2009 Plan <br />o Continue flow metering sub- areas as necessary to isolate sources <br />o Conduct sump pump surveys of 33 % of the sewer service area. <br />o Conduct physical survey of manholes located in "off-road" locations <br />o Complete rehabilitation of any identified manhole inflow sources <br />o Follow up on sewer service line inspection based on experience from 2008 <br />o Continue flow evaluation <br />C. 2010 Plan <br />o Conduct sump pump surveys of 33% of the sewer service area <br />o Continue flow evaluation <br />o Consider sewer replace programs if defective services are identified. <br />D, 2011 Plan <br />o Conduct sump pump surveys of remaining sewer service area <br />o Compiete any remaining rehabilitation projects <br />Page 11 of 12 <br />