06-10-1996 Council Agenda - Laserfiche WebLink

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Projects targeted to produce a metropolitan benefit will receive higher priority than those where a metropolitan benefit is unlikely. Removal of I/I which previously resulted in sewage bypasses would be an example of a project with metropolitan benefit, in that loading to the conveyance and treatment facilities would be lessened and a potential public health hazard would be eliminated. A project to increase the capacity of the local system for the above example would not however be considered an example of a metropolitan benefit. If a project is submitted that cites an elimination of historic bypasses, the application must include a copy of a "MPCA Report Form(s)" which documents the bypass(es). Another example of metropolitan benefit is a project designed to reduce high peak flow rates, resulting from I /I. The 1992 "Systemwide Infiltration /Inflow Evaluation" by the former MWCC is one source of information on communities where peak flow rates are estimated to be above average. Since the aforementioned report did not include information regarding estimated Rain Derived I/I (RDI /I) or Groundwater Infiltration (GWI) for the cities of Minneapolis, St. Paul or South St. Paul, applications from these communities will need to include documentation of their RDI /I and GWI. Other communities may also submit their own information demonstrating high peak flow rates and groundwater infiltration rates for specific project areas. Priority ranking will be given for those communities which were characterized in the "Systemwide Infiltration /Inflow Evaluation" report has having both potentially excessive rain dependent I/I (RDI /I) and groundwater infiltration (GWI). Attached is Exhibit A, a copy of communities identified as having potentially excessive RDI /I and GWI in the 1992 Systemwide I/I Study. Priority ranking will also be given for those communities located within the service areas of the Blue Lake, Metropolitan, and Stillwater wastewater treatment facilities. These treatment facilities were identified in the "Systemwide Infiltration /Inflow Evaluation" study, as benefiting most from I/I removal. Loan recipients will need to demonstrate that they already have an understanding of the source of the I/I and how it can be effectively reduced. Peak rates of inflow have a greater impact on metropolitan wastewater facilities than the long term effect from average rates of groundwater infiltration. Therefore, projects designed to immediately reduce peak rates of inflow will receive higher priority than those designed to eliminate the average rate of groundwater infiltration. After completion of the project, the Community will be responsible for certifying that the project has maintained its intended purpose of I/I reduction. As part of the loan application, the Community is requested to propose the method for certifying the project. The method of certification will be reviewed, negotiated and included in the agreement. Two such Page 4 Page 24