2023.05.23 CC Packet - Laserfiche WebLink

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2 2 extends into Fridley and Columbia Heights to the west, St. Anthony to the south, Mounds View to the north, and Arden Hills and Shoreview to the east while the Well 12 DWSMA is entirely within the New Brighton city limits. The vulnerability of the uppermost source water aquifer in the Primary DWSMA ranges from Low to High (Figure 1). The aquifer vulnerability in approximately 82 percent of the area in the Primary DWSMA is classified as Moderate while approximately 10 percent of the area in the Primary DWSMA has an aquifer vulnerability classification of High. The remaining area (approximately 7 percent of the area in the Primary DWSMA) has an aquifer vulnerability classification of Low. The aquifer vulnerability classification throughout the entire Well 12 DWSMA is Low (Figure 1). Part 1 of the Plan was approved by the Minnesota Department of Health on August 3, 2022. This document comprises Part 2 of the Plan amendment and includes the following information: • A review of data elements identified by the Minnesota Department of Health as applicable to the DWSMA. • Results of an inventory of potential contaminant sources within the DWSMAs. • A review of changes, issues, problems, and opportunities related to the public water supply and the identified potential contaminant sources. • A discussion of potential contaminant source management strategies and the goals, objectives, and action plans associated with these management strategies. • A review of the Wellhead and Source Water Protection evaluation program • New Brighton’s alternative water supply contingency strategy specified in the City’s Local Water Supply Plan that was previously submitted to and approved by the Minnesota Department of Natural Resources. The potential contaminant source inventory (PCSI) was performed in accordance with Minnesota Department of Health (MDH) requirements. Potential sources of contamination that could affect the source water aquifers were identified during the PCSI. The PCSI identified potential contaminant source locations in the Primary DWSMA but did not find any potential contaminant source locations in the Well 12 DWSMA. Potential contaminant sources identified in the Primary DWSMA include wells, storage tanks (including properties where leaking underground storage tanks had been located), hazardous waste generators, aggregate mining locations, dump and spill sites, chemical storage sites, properties where Class V wells may be or may have been present, and sites where contaminants have or may have been released (some of these sites are not included in the other potential contaminant source categories). The goals and objectives of this Plan will focus on reducing the potential contaminant pathways to the source water aquifers that may be provided by private wells, educating property owners and water supply users, and working with surrounding governmental units whose jurisdictions overlap the DWSMAs to ensure, to the extent possible, proper management of the portions of the DWSMAs that extend into these other jurisdictions. The City has identified the following goals for implementation of this Plan: