Agenda - Council - 02/26/2019 - Laserfiche WebLink

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layer, shallow bedrock valleys, and (especially) the elevated tritium levels in the City wells indicate that shallow groundwater contamination will reach the City wells. In fact, the MDH has determined that Ramsey wells 3 and 4 are vulnerable to shallow groundwater contamination (Steve Robertson, MDH Hydrologist, 651-215-1322) and requires the City to address all potential contaminant sources in its wellhead protection plan (Art Persons, MDH Planner, 507-292-5138). This does not mean that a leaking underground storage tank would likely cause the water from the City well to rapidly become unfit to drink. It means that in a system to uniformly evaluate the vulnerability of public water supply wells — Ramsey wells 3 and 4 require more attention to contaminant sources than other wells. Recommendation (of the commenter): 4. The statement in the Summary of Environmental Impact (page 19-3) should be modified to reflect the above comments. Response: The Summary of Environmental Impact in Item 19 has been changed to reflect the comment. Comment 8.20: Discussion of this important drinking water protection program should be focused in this document instead of distributed throughout the sections of the AUAR. Recommendation (of the commenter): 5.The discussion regarding wellhead fundamentals should be consolidated with discussions in other sections and placed in the water use section/item. Response: Discussion of wellhead protection program fundamentals was expanded and consolidated into the Wellhead Protection section of Item 13. However, discussions of wellhead protection relevant to Items 19 and 20 remain within those Items. Comment 8.21: The statement on page 13-2 regarding MDH approved wellhead protection plans is not accurate. Currently, the City is completing the second half of its wellhead protection plan that addresses wells 1, 2, 3 and 4. Well 5 is not part of the City's developing plan because it was constructed and activated after a wellhead delineation project commenced. A separate wellhead delineation project will have to be performed for Well 5 and likely addressed as a plan addendum with other City wells constructed in the next two years. Recommendations (of the commenter): 6. The statement regarding the City's wellhead protection plan should be modified to reflect the above information. 7. Information regarding the location of the anticipated additional well should be included in the AUAR. Response: The paragraph on page 13-2 has been modified as follows: 34-17