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sources of contamination (storage tanks, hazardous waste generators) while residential land uses have a greater potential for non-point source pollution from lawn and garden applications. Land uses are unlikely to changesignificantly over the 10-year lifetime of this plan, since large portions of theDWSMA arealready fully developed, with the exception of areas along the I-35 corridor which are identified as experiencing expansion or commercial and industrial land uses by 2040. Careful cooperation with neighboring communitieswill be important to ensure that these planned uses do not have an impact on the aquifer(s) serving municipal wells for Centerville, Lino Lakes, and Hugo. 5.4 Wells An important component of the potential contaminant source inventory was the location of any known wells within the DWSMA. Since wells may penetrate confining layers that normally protect an aquifer, they are potential pathways for contaminants to rapidly enter the aquifer. A search for active and unsealedwells was undertaken for the entire DWSMA. The following sources were used to identify wells in the DWSMA: 1. Minnesota Geological Survey’s County Well Index (CWI) 2. Personal interviews with City staff 3. Site reconnaissance 4. Aerial photos In general, information from the CWI and the City of Centervillewas used to identify known wells, while the information from the MDH was used to document abandoned or sealed wells. City staff and site reconnaissancewas useful in identifying locations for the identified wells. The results of the well search indicated that there are 202 known wells currently in the DWSMA for the City of Centervilleincluding the municipal supply wells. A listing of these wells is provided in Table A-1 in Appendix A and their mappedlocations are depicted in Figures 2A and 2B.More wells are likely to exist within the DWSMA, but haven’t been identified due to the incomplete nature of the available databases. Management strategies willbe implemented as part of this plan to help obtain more information about the actual number and status of wells within the DWSMA. Another type of well that is inventoried as part of the Wellhead Protection Plan is Class V injection wells. These wells include shallow disposal wells and automotive drains that are not connected to municipal sewer service. At present, no knownClass V injection wells were found within the DWSMA, but the lack of a comprehensive database for these wells makes them difficult to verify. 5.5 Point Sources An important component of the potential contaminant source inventory was to look for any point sources within the DWSMA that might be a threat to the quality of Centerville’swater supply. For a 12 193803358 Stantec Consulting Services, Inc.