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Local Water Supply Plan—Centerville Projection Method Describe the method used to project water demand, including assumptions for population and business growth and how water conservation and efficiency programs affect projected water demand: The total per capita water demand average was approximately 83 gpcd between 2010 and 2015. A per capita demand of 100 gpcd (2012 gpcd from a hot, dry summer) is the recommended value for projecting future water demand, evaluating current infrastructure, and improvement planning. The projected maximum day demand was calculated based on a maximum to average day demand ratio of 3.0.The maximum day demand ratio has averaged 2.6 from 2010 to 2015, but was 2.98 in 2014. E. Resource Sustainability Monitoring—Key DNR Benchmark Complete Table 8 by inserting information about source water quality monitoring efforts.The list should include all production wells, observation wells, and source water intakes or reservoirs. Additional information on groundwater level monitoring program at: htp://www.dnr.state.mn.us/waters/groundwater section/obwell/index.html Table 8.Information about source water quality monitoring E (�=Nml Well 1 ❑ production well ❑ Routine MDH ❑ continuous ❑SCADA 511091 ❑observation well sampling ❑ hourly ❑grab sampling Q emergency ❑ Routine water ❑ daily ❑ steel tape standby well utility sampling ❑ monthly ❑ stream gauge ❑other ❑ quarterly ❑ annually Well 2 Q production well 0 Routine MDH ❑ continuous ❑SCADA 512748 ❑observation well sampling ❑ hourly Q grab sampling 0 Routine water Q daily ❑steel tape utility sampling Q monthly ❑ stream gauge ❑other ❑ quarterly Q annually Water Level Data A water level monitoring plan that includes monitoring locations and a schedule for water level readings must be submitted as Appendix 2. If one does not already exist, it needs to be prepared and submitted with the WSP. Ideally, all production and observation wells are monitored at least monthly. Complete Table 9 to summarize water level data for each well being monitored. Provide the name of the aquifer and a brief description of how much water levels vary over the season (the difference between the highest and lowest water levels measured during the year) and the long-term trends for each well. If water levels are not measured and recorded on a routine basis, then provide the static water level when each well was constructed and the most recent water level measured during the same season the well was constructed. Also include all water level data taken during any well and pump maintenance. Add rows to the table as needed. 9 54