04/03/2023 SELECT BOARD Minutes - Laserfiche WebLink

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Mashpee Select Board Minutes April 3, 2023 APPOINTMENTS & HEARINGS Discussion wand„Possible Aproyal of ReIuest to Authorize the Use Unrestricted Town Owned Propely,,,walong Johnson Road for Nitrggen Aggregation as Allowed by Title V Regulations to bewCredited to,474 Main Street/3-1 Ashumet Road to Facilitate wA,ff,,,,ordablewHousing in Excess of Nine Bedrooms Joao.Jun�lueira, Calaewide Construction: Town Manager Rodney C. Collins recommended the Select Board table this matter to conduct further due diligence on this matter. Motion made by Selectman Cotton to table the above referenced agenda topic as recommended. Motion seconded by Selectman O'Hara. VOTE: Unanimous. 5-0. Roll Call Vote: Selectman Weeden, yes Selectman Cotton, yes Selectman O'Hara, yes Selectman Sherman, yes Selectman Wyman -Colombo, yes Opposed, none Department of Natural Resources Presentations: U11 e on the „Mashpee Wakeb y Dia�ost c Stud y; Ed,Eichner�,MTMDL Solutions School of.Marine Scienceand w tv of,Massachusetts Dartmouth: Technolo �, „(SMAST Umversi _ ... , .. The Select Board met with Ed Eichner, Principal from TMDL solutions and the School of Marine Science and Technology at UMass Dartmouth to give an update on the progress of the first year of sampling for the Mashpee Wakeby Diagnostic Study. Dissolved oxygen and temperature profiles were taken last year on a continuous basis, every fifteen minutes. In addition to the water column monitoring in each basin, the Diagnostic Study and Management Plan outlines the entire population of phytoplankton surveys including cyanobacteria, the sediment survey in each basin, the stream outflow, rooted plant and mussel (endangered species) surveys and their locations, and the watershed assessment including nitrogen and phosphorus concentrations during certain conditions. The study will also survey stormwater, and locate septic systems to determine if they are contributing to the water column. The information on the contributors and options as well as costs acceptable to the community for clean water will assist the study in moving forward with the development of the Management Plan. The dissolved oxygen (DO) profile in 2022 shows impairment and the absence of oxygen in both the Wakeby and Mashpee basins. This suggests a higher sediment oxygen demand in the Wakeby basin when comparing it to the Mashpee basin. Due to its location in the watershed the Wakeby basin receives more nutrient impaired groundwater. How the conditions develop will be realized with the water column data. Different approaches would be considered if the impairments are due to sediment and/or watershed conditions. Good information leads to good policy. Refined data will give the fullest picture of variations. It was suggested that data from 2019(pre-covid) be incorporated into the study. With the pandemic there has been an increase in home sales and rentals that may affect TMDL's. In addition to nitrogen and phosphorus, PFAS is a concern. Drought conditions are also a factor to incorporate into the review.