11/09/2023 COMMUNITY PRESERVATION ACT COMMITTEE Minutes

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4 Community Preservation Committee Minutes November 9, 2023 APPOINTMENTS & HEARINGS Review of Project Alications to be considered for the Ma 2024w Slsecial Town Meeting The Community Preservation Committee is in receipt of (4) applications to be considered for the May 6, 2024 Special Town Meeting. Two applications were reviewed on this date. The additional submittals will be reviewed at the next meeting. Ashle�Fisher Dm rectormof Natural Resources. Pro ect„Ashumet Pond WNutrient _Inactivation _....__ Treatment: Change of Name: Ashumet Pond Rehabilitation andµwRestoration Proiecte Ashley Fisher, Director of Natural Resources was in attendance to review the Ashumet Pond Rehabilitation and Restoration project to restore water quality. Ashumet Pond is noted to have a long history of nutrient impairment stemming from a phosphorus enriched groundwater plume emanating from the wastewater treatment facility located at the military base in the early 90's. The clean-up effort of the base thereafter resulted in the construction of a new wastewater treatment facility re -directing the discharge away from Ashumet Pond. Other treatments were initiated at the groundwater interface abutting the pond. Phosphorus is a nutrient for plants, including algae, which depletes the water of oxygen. The Town of Mashpee has been working with Joint Base Cape Cod (JBCC) for 20 plus years to address the phosphorus issue. Two aluminum sulfate treatments have been made in the pond to capture the phosphorus. A third nutrient inactivation treatment is requested to further reduce the phosphorus from the bottom sediments, and to reduce the public health risks associated to the cyanobacteria blooms. The Town of Mashpee is currently engaging with JBCC through an Environmental Service Agreement to potentially share 50% of the cost, a reimbursement for the additional treatment proposed to not exceed $1,000,000, based on the cost of the solution. The CPC funding request is $675,000. However, costs are not fully known at this time. Factors such as an additional shellfish survey may be required. Aluminum sulfate is a salt that is water soluble and it is mainly used as a coagulating agent in the purification of drinking water and wastewater treatment facilities. It binds with a wide range of particles from clay and sand sediments to nutrients such as nitrogen and phosphorus.