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1&1 4/10/2008 Page 2 like to install a monitor at Lift Station 11, and possibly some other lift stations, to record exact run times of the pumps. (For example, be able to tell that a pump ran from 1:00 p.m. to 1:04 p.m., and again from 1:15 p.m. to 1:20 p.m.) Staff will calibrate the lift stations at the same time the flow meters are installed. Manhole inspection and rehabilitation proiect: Public Works staffwill inspect 147 manholes identified on the attached map. Staff will compile information from all ofthe completed inspections and determine which manholes need rehabilitation and/or repair. Manholes needing minor work, such as the installation of a chimney seal or replacement of a casting, will be completed by Public Works crews. Manholes needing major structural rehabilitation will be contracted out. Staff anticipates that this project would be ready to advertise in early summer; this project will be brought back to council to authorize advertisement for bids. Smoke testing: Smoke testing is one way to determine ifthe 1&1 is the result of Infiltration (ground water) or Inflow (sump pump or storm sewer connections). This is the most efficient and cost effective way to locate and identify the number of rain leaders from buildings that are connected to the sanitary sewer. Smoke testing involves forcing smoke. filled air through the sewer line. The smoke will fill the main line plus any connections following the path of the leak to the ground surface revealing the location and source of the problem. At this time, the consultant recommends the following areas, also identified on the attached map, be included in smoke testing: the area flowing to Temporary Meter 3 (the Glenarden neighborhood) and the area flowing to Lift Station #11 (northwest comer of the City.) Develop and begin sump pumP inspection program: City staff has contacted Mounds View, New Brighton and Little Canada requesting information on their sump pump programs. We have begun to receive responses and information from these cities. Bonestroo has also provided an estimate to assist the City in developing a program and training staffto complete inspections. Staff will continue to compile this information and present a proposed program to the City Council for approval. Sanitary Sewer televising and lining proiects: Public works crews are continuing to televise the City's sanitary sewer lines. The videos will be reviewed, and sanitary sewer mains identified as good candidates for lining will be combined into a sewer lining project. We anticipate this project to be a joint project with the City of Roseville, as they also are planning a sewer lining project for 2008. FINANCIAL IMPLICATIONS All costs for this additional study will be paid for using sanitary sewer funds budgeted for inflow and infiltration reduction; $100,100 was included in the 2008 budget for these purposes. The findings of each step will be brought to the City Conncil once the additional study is complete. The consultant costs are $15,000 to assist City staff with the additional study, plus $3,300 for assistance with the development of a sump pump program.