2020-09-09 CC Minutes - Approved

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City of Centerville Council Meeting Minutes September 9, 2020 1. None. V. PUBLIC HEARINGS 1. Draft Well Head Protection Plan, Part 2 Mr. Mark Janovec was introduced by Administrator Statz. Mr. Janovec, Stantec, Senior Scientist stated that approximately a year ago he presented Part 1 of the Well Head Protection Plan and now he is presenting Part 2 of that same Plan. Mr. Janovec reviewed a presentation with Council and stated that it is required by all public water suppliers in the State of Minnesota who get their water from ground water aquifers or from wells to submit their Plan to the Department of Health every 10 years. He stated that the idea is to identify where within the source that you are receiving your water (aquifer) you get your water from within a 10 year time of travel. He said that way if there is any contamination that would impact the aquifer the City would know that you are at risk of pumping that into your wells which in turn goes into your water supply system. He stated that it also assists in identifying the vulnerability of the aquifer that serves the wells that the city utilizes. Mr. Janovec reviewed a computer model (Figure #1) of the City of Centerville which identifies where water is received from the City’s wells and stated that a good portion of Centerville is covered by the Well Head Protection Plan but is also includes the cities of Lino and Hugo. He stated that the entire City is within the City of Lino Lake’s Well Head Protection Plan. He stated that the entire City is within a Well Head Protection Plan due to that. He also stated that the City’s primary well is Well #2 with Well #1 being an emergency backup. He explained that the red line is water that will be pulled into Centerville’s well from the aquifer in a one year time of travel and the blue line is water that will be pulled into Centerville’s well from the aquifer in a 10 year time of travel (this is what needs to be managed). He stated that the black line follows visible boundaries on the land surface such as roadways or parcel boundaries which is the Drinking Water Supply Management Area (DWSMA). That is what will be managed with this plan. He stated that the aquifer is moderately vulnerable which means that there is some geological protection between the land surface and the aquifer that does protect the City’s drinking water source. He also stated that the chemical data from the well shows that there may be some younger water that is infiltrating down to the aquifer and that because it is not known if the protective layer is completely encompassing that area, it is what determines the vulnerability. He reported that the Part 2 planning process identified what are the potential sources within the DWSMA that could impact the well (private wells and storage tanks in the area). He stated that Stantec has identified 202 wells within the area and 9 storage tank sites. He reported that they also looked at what has happened in the area in the past which uncovered that there had been 20 spills that were noted by the PCA and that all were considered closed. Mr. Janovec stated that there are four (4) main goals of the Well Head Protection Plan: continue providing high quality water that meets state and federal drinking water standards; practice prevention strategies (Best Management Practices) for properties containing potential contaminant sources to avoid adversely impacting the quality; work cooperatively with nearby local units of government including Anoka County, adjacent communities and state agencies on regional aquifer protection actions; and build awareness of well head protection goals among and disseminate Page 2 of 12