2020-09-09 CC Packet - Laserfiche WebLink

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5.1 Introduction As partof the City of Centerville’s wellhead protection planning process, an inventory of potential contaminant sources was conducted within the delineated drinking water supply management area (DWSMA). The purpose behind this inventory was to develop a database listing potential sources of contamination that may affect the public water supply wells for the City of Centerville. The results of this effort provide the City with information about contaminant sources identified in theDWSMA. Wellhead protection planning strategies can be directed in a manner that will deal with any potential sites before they become a problem or a threat to Centerville’sdrinking water supply. 5.2 Land Use Following ascoping meeting held with Minnesota Department of Health (MDH) staff in April 2019, the Cityproceeded to locate informationabout land and water use within the delineated 10-year DWSMA for Centerville’s wells. Any data which was relevant to the City’s wells, the quality of the water being drawn into the wells, or land and groundwater uses around the wells was considered important in determining any potential threat to the water supply. The following criteria were used: 1. All areas must be inventoried as to the types of land and water uses, as discussed below. 2. All areas within the DWSMA delineation require an inventory of wells or other borings or excavations that penetrate bedrock-confining units. 3. All areas must be evaluated for the presence of storage tanks, including tanks containing fuels, solvents, or other chemicals. 4. Known spill and leak sites will be inventoried within the DWSMA.While this isn’t required in the Scoping Decision Notice, this was included in the plan to give a good understanding of where spills have occurred in the past and to determine if certain properties may pose a continuedrisk of contamination. Each of these elements is described separately below. 5.3 Parcel-Specific Land and Water Uses Understanding land use is important in determining key areas for concern in managing a wellhead protection area. For example, knowledge about the location of future commercial development in relation to the DWSMA may reveal a need to closely manage the activity within more sensitive areas. Additionally, any parcels that currently pose a potential threat to the City’s water supply need to be highlighted to increase awareness of any concerns. Current and future planned land uses for Centerville, Lino Lakes, and Hugo are shown in Appendix B, based on the respective comprehensive plans forthose cities.A large percentageof the parcels in Centerville’sDWSMA are shown to beresidential ranging from higher density residential to single familyresidential. A mix of commercial, public/institutional, and industrialis also present in smaller percentagesin the Centervilleand Hugo portions of the DWSMA. The portion of the DWSMA in Lino Lakes has a larger percentage of commercial and industrial land uses planned, particularly along the I-35 corridor. Commercialor industrialland uses have the greatest potential to contain point 11 193803358 Stantec Consulting Services, Inc.