01/26/1998 Council Packet - Laserfiche WebLink

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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 first be given for those communities having an identified I/1 Goal, then secondly to those communities which were characterized in the "Systemwide Infiltration/Inflow Evaluation" report as having high wet weather peak flow ratios. Priority ranking will also be given to those communities which were characterized as having both potentially excessive rain dependent I/1 (RDI/I) and groundwater infiltration (GWI). Attached is Exhibit A, containing a listing of all communities served by the MDS, ranked by wet weather peak ratios with those having identified I/I goals given priority over those communities having no identified goals. Also attached is Exhibit B which identifies those communities having potentially excessive RD/I and GWI in the 1992 Systemwide I/1 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 1/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. Loan applicants will need to estimate the annualized volume of I/I targeted for removal by the project, and will need to provide the basis of the estimate. After completion of the project, the Community will be responsible for certifying that the project has maintained its intended purpose of 1/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 methods of certification would be to document the condition of the project by means of televised inspections or by visual inspections. The certification shall be signed by an Engineer registered in the state of Minnesota. The general criteria are summarized below. Higher priority rankings will be assigned for projects characterized by items from the top of this list. Lower priority rankings will be associated with items from the bottom of the list. Proposed Project Ranking Criteria for Loans (Descending Order of Priority) Estimated total of 1/I reduction as result of project is either greater than 30 MGY, between 15 MGY and 30 MGY, or between 5 MGY and 15 MGY Page 4