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'--~ the aquifer units used by the City's wells (Prairie du Chein and Jordan), exhibit confined hydraulic conditions. As a result, these elements influence the aquifer on a regional scale which is outside the scope of this plan. Use of Wells The City's wells provide ample water volume for current demand using peak demand controls during high water demand. Additional wells and system infrastructure may be necessary if (or as) development proceeds. Consideration will be given to construction of future wells to a depth that draws water from a non-vulnerable aquifer. Monitoring and maintenance will continue for the upkeep of the wells. Quantity and Quality of Water There is a sufficient quantity of groundwater available to supply the City's system in the foreseeable future. However, long-term groundwater availability is not taken for granted and must be evaluated periodically to determine if City or regional issues develop. The quality of water from City wells meets the criteria of the MDH for drinking water. The City will continue to cooperate with the MDH to monitor its well water quality to identify any developing issues. The wells will continue to be used as groundwater quantity and quality monitoring points. Land Use in the DWSMAs The majority of land within the City's DWSMAs is single- and multi-dwelling residential use. The commercial and industrial land use represents the majority of potential contaminant sources within the DWSMAs including petroleum storage tanks, hazardous waste generators, and contamination cleanup sites. The parcels classified as exempt include State, County, and City operated facilities that may include potential contaminant sources. Groundwater Use in the DWSMAs City wells represent the dominant use of groundwater in the DWSMAs. Other users include private home wells, commercia! and industrial ....vells that do not have significant impact on the availability of groundwater for the City wells. Commercial, industrial, and other public water supply high capacity wells draw sufficient volumes of groundwater to possible impact on the City's WHPAs and were considered during delineation of WHPAs. Changes in groundwater use by other wells may impact the configuration of the City's WHPAs. The availability of groundwater to City wells is not considered to be impacted by other wells within the DWSMAs, but monitoring of static and pumping water levels may be utilized to determine trends in groundwater availability. July 3,2007 DRAFT CentelVille Wellhead Protection Plan (Part 2) Page 10