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Town of Mashpee Conservation Commission <br /> 16 Great Neck Road North <br /> Mashpee, MA 02649 <br /> aluminum dock materials on freshwater pond conditions, including concerns regarding aluminum degradation <br /> and water quality impacts in acidic freshwater environments. <br /> Commission members also discussed the proposed vinyl sheet pile wall, with explanation provided that vinyl <br /> was selected due to its durability, stability, and long-term resistance to degradation. Additional concerns were <br /> raised regarding the proposed replacement walkway, drainage patterns toward the pond, and the need to <br /> utilize permeable pavers and trench drainage systems to reduce stormwater runoff toward the resource area. <br /> The applicant's representative agreed to revise the walkway proposal accordingly. <br /> Further discussion addressed inconsistencies in the submitted plans and narrative regarding wall dimensions, <br /> inland bank disturbance lengths, and overall wall configuration. It was stated that varying measurements had <br /> been provided in different sections of the application materials, including references to 50-foot, 54-foot, and <br /> 60-foot wall lengths, as well as differing return wall dimensions. The applicant's representative stated that the <br /> discrepancies would be reviewed and clarified in revised submissions. <br /> Following discussion, the applicant requested a continuance to June 11, 2026, in order to provide revised <br /> information responsive to Commission comments and outstanding questions. <br /> MOTION: To continue 17 Sunset Circle to June 11, 2026. <br /> Motion by: Sandi Godfrey Seconded bv: Seana Pitt <br /> Vote: Motion passed unanimously by roll call vote. <br /> Steve Cook, Paul Colombo, Sandi Godfrey, Seana Pitt <br /> NOI 31 Nick Trail, 31 Nick Trail, LLC. Proposed raze the existing single-family dwelling and <br /> construct new dwelling. (Representative: Grady Consulting, LLC) (cont. 4.2/4.23) <br /> 43- <br /> 3408 <br /> It was stated that the existing structure had been constructed in 1953 and did not comply with current floodplain <br /> standards. Representatives reviewed revisions made in response to prior Commission comments, including reductions in <br /> lawn area,installation of additional native plantings prepared by a registered landscape architect, addition of dry wells, <br /> reduction in patio size, and conversion of the proposed patio to a pervious surface. It was further stated that the <br /> proposed septic system design had been reviewed and confirmed by the engineer who designed the original system. <br /> Extensive discussion followed regarding nitrogen loading calculations, groundwater protection standards, and <br /> interpretation of state and local regulations applicable to the project. Concern was expressed regarding the amount of <br /> nitrogen calculated to be generated from the lot and whether the proposed project complied with groundwater protection <br /> objectives within a DEP wellhead protection zone. Discussion addressed the distinction between state Title V standards <br /> applicable to increased septic flow and the Commission's authority under local wetland bylaws to evaluate cumulative <br /> adverse groundwater impacts. It was asserted that the project involved replacement of an existing dwelling without <br /> increased septic flow and that the proposed septic system complied with applicable state requirements. It was further <br /> argued that the project would improve existing conditions through flood compliance upgrades and installation of <br /> updated wastewater treatment components. Additional discussion addressed differing interpretations of nitrogen <br /> standards and whether local regulations imposed stricter groundwater protection requirements than those established <br /> under state Title V regulations. It was stated that the project's nitrogen calculations exceeded certain state drinking <br /> water thresholds cited during discussion, while representatives for the applicant maintained that those standards were <br /> not applicable because the project did not involve increased wastewater flow. It was further stated that the <br /> Commission's local bylaw addressed significant and unacceptable cumulative adverse effects rather than fixed <br /> numerical nitrogen thresholds. Discussion also referenced prior quarterly Commission discussions concerning nitrogen <br /> attenuation, groundwater protection, and limitations associated with existing nitrogen calculation methodologies. <br /> 9 <br />