01/15/2019 BOARD OF SELECTMEN Agenda Packet

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removed outside of the watershed or treated to the levels required based on the MEP modeling results. – Collection system expansion (Main Street/Route 130) Subarea T to Site 4. -- Collection system expansion to Subareas A and C (Seconsett and Monomoscoy Islands). – Collection system expansion to Childs River watershed portion of Subarea H. ® End of Phase compliance reporting—consider updating MEP Model runs (landuse and hydrodynamic models) and MEP calibrate with water quality and benthic flux sampling as needed. This schedule represents one possible future where the PPA is forced to implement traditional infrastructure to serve those areas outside of the Quashnet River Watershed where shellfish aquaculture is being pursued to reduce nitrogen loadings within the affected bays. Development of MOUS with neighboring towns will be necessary to establish a potential phasing strategy based on each town's specific needs. Towns may address other "neighborhoods" within the watersheds based on each individual town's planning efforts and approach. Monitoring and modeling efforts at the five-year intervals will be necessary to establish the extent of nitrogen removal following shellfish aquaculture implementation. ES.8 Next Steps Due to the long duration and complexity of this project as well as the inclusion of a number of different stakeholders who are critical to the success of achieving the TMDLs, there are several items that will need to be addressed following the submittal of the plan. This is a function of several different initiatives that are proceeding concurrently with this project, most notably: • The ongoing 208 Planning Process going on through Barnstable County and the Cape Cod Commission. • Joint Base Cape Cod and Mass Development evaluations of the existing utilities (electrical, water, sewer, etc.) at the existing base and ownership discussions regarding these utilities. • Town of Barnstable Nutrient Management Planning efforts Town-wide, as they are related to the portions of Cotuit within the PPA. • Town of Falmouth Comprehensive Wastewater Management Planning efforts related to the "South Coast' embayrnents including Waquoit Bay. • Town of Sandwich Comprehensive Planning efforts and future development projects being evaluated. • Commonwealth of Massachusetts planning efforts related to the use of alternative approaches and technologies related to nutrient removal (primarily on Cape Cod, Southeastern Massachusetts, and Buzzards Bay). With this in mind, there are several key steps/decisions/directions in wastewater and nitrogen management planning that will help in the completion of the Recommended Plan and its implementation over the next several decades. 8612001 A Town of Mashpee sewer Commission ES-17 Final Recommended Plan/Final Environmental Impact Report