01/15/2019 BOARD OF SELECTMEN Agenda Packet

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1 U I fa I v=l – New Seabury recharge facilities construction to support treated effluent from Mashpee Commons and Site 6. – Barnstable and Sandwich to begin provisions to address their remaining portions of the Popponesset Bay Watersheds. • 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. • Coordinate with 208 Plan and potentially run CCC MVP tool in conjunction with MEP Model runs to check on updated water data and possible adaptive management approaches. • Determine additional evaluations of existing wastewater treatment facilities leading into next phase of proposed improvements. 2032-2036: Phase 4 • File Notices of Project Change and DRI modifications (as necessary) to inform (and gain approval from) the environmental review process on the agreements and funding that will allow the next steps to proceed. • Upgrade of Cotllit Meadows and Wampanoag Village to improve nitrogen removal performance (dependent on MEP modeling results and permit requirements). • If shellfish propagation continues to lag or is not advancing as fast or to the levels anticipated: -- Site 6 facility expansion with associated sewer extensions to serve Hamblin/Jehu Pond areas of Mashpee. – Collection system expansion to Site 6. Collection system expansion on Creat Neck Road North to Mashpee Commons, Collection system expansion for Hamblin and Jehu Pond Areas, upgrade/expansion of New Seabury WWTF. • 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. • Coordinate with 208 Plan and potentially run CCC MVP tool in conjunction with MEP Model runs to check on updated water data and possible adaptive management approaches. • Determine additional evaluations of existing wastewater treatment facilities leading into next phase of proposed improvements. 2037-2041: Phase 5 • File Notices of Project Change and DRI modifications (as necessary) to inform (and gain approval from) the environmental review process on the agreements and funding that will allow the next steps to proceed. • If shellfish propagation continues to lag or is not advancing as fast or to the levels anticipated: – Remaining wastewater nitrogen from Barnstable (B-37 and parts of B-38) and Sandwich Subareas (Sand-4, -5, and -6) within the Popponsesset Bay watersheds will need to be 8612001.4 Town of Mashpee Sewer Commission ES-16 Final Recommended Flan/Final Environmental impact Report