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Centerville 2040 Comprehensive Plan <br /> <br /> <br />the year) and December to February (representative of a dry portion of the year) were <br />determined. It was determined that the wet monthly average flow (March-November) was 8.11 <br />mg, and that the dry monthly average flow (December- February) was 7.63 mg. Thus, on <br />average, I/I contributes roughly 0.47 mg monthly (roughly 6% of base flows). The peak flow for <br />the City of Centerville is 10.00 mg in May 2017, which is roughly 31% of base flows. <br />Potential sources of I/I could include: <br />Groundwater infiltration in low areas around lakes within the City, <br />Underground springs that may contribute to groundwater infiltration, <br />The increasing frequency of high-intensity rain events in the region that contribute <br />inflow, especially when the 100-year high-water level is exceeded, and <br />Compromised sewer lines and manholes. <br /> <br />GOALS, POLICIES AND STRATEGIES TO ADDRESS I/I <br /> <br />There are several strategies that the City uses to address I/I. First, Centerville uses its code to limit <br />I/I. The City prohibits sump pumps, foundation drains and rain leaders from being connected to, <br />and/or discharged into, the sanitary sewer. City Code, section 150.30 states: <br />ted. It shall be unlawful for any owner, occupant or user <br />of any premises to direct into or allow any stormwater, surface water, groundwater, roof <br />runoff, pond overflow, well water or water from residential, industrial or commercial air <br />Other mechanisms used to limit I/I include links dispersal of educational material relating to I/I. <br />For instance, the City's website, social media feeds and newsletter provide information on I/I <br />prevention and mitigation. The City also provides brochures about the subject in the front lobby <br />of City Hall. <br />Should issues relating to I/I arise, the City will implement measures such as: <br />Targeted flow monitoring, <br />Sump pump inspections based on flow monitoring results, <br />Wet weather televising of vulnerable areas, and <br />Follow up, including cast-in-place concrete lining of leaky areas identified by TV <br />inspection. <br /> <br /> Page 88 <br /> <br /> <br />