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Comprehensive P l a n z o z z <br /> (DRAFT 03/18/22) <br /> Source:MassGIS Public Water Supplies <br /> Zone I is used to designate the protective radius required around a public water supply well or wellfield. <br /> Mashpee has 23 Wellhead Protection Areas designated in Zone I (MassGIS, 2021). DEP Zone 11 and public <br /> water supply (PWS) data are closely linked. Wellhead Protection Areas are important for protecting <br /> recharge areas around public water supply groundwater resources (MassGIS, 2021). Mashpee has 12 <br /> Wellhead Protection Areas designated in Zone 11 (See Map—X.X) (MassGIS, 2021). In the absence of an <br /> approved Zone 11, DEP has adopted the Interim Wellhead Protection Area (IWPA) as the primary, <br /> protected recharge area for PWS groundwater sources (MassGIS, 2022). Mashpee has 11 Interim <br /> Wellhead Protection Areas(See Map—X.X)(MassGIS, 2021). <br /> Water Resource Risk and Protection Zones Map is needed in this section. We will map this information <br /> through MassGIS Data. <br /> Further information is needed in this section regarding Groundwater. We will gather this information <br /> through stakeholder interviews and GIS analysis. <br /> 4.2.10 Threats <br /> A variety of land uses, and human activities pose a threat to the town's natural resources. This section <br /> presents the most notable threats to the natural resources in Mashpee. <br /> Uinrnainaged Stourvrn ater Runoff <br /> Stormwater is rainwater or melted snow that runs off streets, roofs, pavement, and other impervious <br /> surfaces as well as lawns, woodlands, and other more pervious areas as they become saturated. As the <br /> water flows over these surfaces, it can collect pollutants and sediment that can contaminate water <br /> bodies. Stormwater is addressed by federal, state, and local regulations. The United States <br /> Environmental Protection Agency (USEPA) has determined that municipal separate storm sewer <br /> systems (MS4s), a drainage system in an urbanized area, are a major pathway for the introduction of <br /> pollutants to waterways and are a leading cause of the impairment of ambient water quality, for both <br /> fresh and coastal waters (United States Environmental Protection Agency). Through the National <br /> Pollutant Discharge Elimination System(NPDES)under Section 319 ofthe Clean Water Act,the U.S. EPA <br /> regulates stormwater from MS4s. The Massachusetts Department of Environmental Protection <br /> (MassDEP) is delegated by USEPA to administer the program in Massachusetts. In 2016, EPA issued a <br /> final NPDES general permit for discharges of stormwater from small MS4s in Massachusetts (the MA <br /> MS4 Permit)(United States Environmental Protection Agency). <br /> Mashpee is currently subject to MS4 jurisdiction in Massachusetts. Under this law, MassDEP requires <br /> subject communities to develop stormwater management program plans (SWMPPs) to address six <br /> minimum control measures. The six minimum control measures required in the SWMPP are addressed <br /> in Mashpee's Stormwater Management Program (Tighe&Bond, 2019): <br /> • Public Education and Outreach <br /> • Public Participation <br /> • Illicit Discharge Detection and Elimination <br /> • Management of Construction Site Runoff <br /> westonandsampson.com 10 Weston <br />