11/08/2021 CONSERVATION COMMISSION Minutes

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3 Select Board Minutes November 18,2021 Presentation and Review of Phase 1 of the Wastewater Management Plan: Sewer Commission Chair: (continued) The areas selected for Phase II are based on their ability to connect to Phase I and the removal of nutrients from both Popponesset and Waquoit Bays as well as the treatment of sewage that would flow into Mashpee-Wakeby, Santuit, John's and Ashumet Ponds. Phase II has a design flow from all 5 areas of 1,051,000 gallons per day. Flows from Phase I including sites 2A through 2D, (838,000 gpd)would be piped to the (modular) treatment plant at the Transfer Station to be constructed under the Phase I program. The Site 4 Wastewater Treatment Facility in Phase I is currently designed to have capacity for an annual flow of 120,000 gpd. Therefore, modifications to the Comprehensive Nitrogen Management Plan are necessary to address the dire need to remediate Mashpee waters. The new and amended plan to be submitted to the DEP and MEPA for approvals is entitled the 2021 Mashpee Clean Water Plan. The schedule is deemed aggressive and necessary. In moving forward,the Select Board was requested to place an article on the May 2022 Town Meeting warrant to provide for 25% schematic design to begin Phase II. Estimated cost assumptions are forthcoming. The Town having use of available funding would not need borrowing authorization for costs associated to the initial schematic design. It was noted the October Town Meeting authorized the funding of a diagnostic study of Mashpee- Wakeby Pond to determine nutrient mitigation, water quality management practices and public access improvements. Results of this study will be used to support the acquisition of state SRF funds for the sewering around the lake. With approval of the 25% schematic design authorization, it is anticipated the Town would follow a similar schedule as in Phase I and apply for SRF funds in August with receipt of notification of a potential grant award in January 2023. This would be highly advantageous, and allow for the ability to fast track the project to conceivably move forward to construction authorization at the May 2023 Town Meeting. A conceptual timeline would consider project commencement in 2025 with connection to those within the lake areas in 2025. To bring forth the most advantageous financing option for affordability,the Town would apply for state funding 0% interest loans. It was noted the Phase 1 project is designed as a modular facility for expansion for future phases. Costs are based on decisions made during design and would be used in the development of Town appropriations. The timeframe is realistic to move aggressively with approvals to be made as the Town moves forward. With successful Phase I bidding, it is hopeful the Town would move forward to secure a contractor in late spring with construction to commence in the early summer of 2022.