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Town of Mashpee Conservation Commission <br /> 16 Great Neck Road North <br /> Mashpee, MA 02649 <br /> There was also brief discussion about the numerous boulders lying in the water. The Agent recommended <br /> conditioning the approval to require their removal, explaining that although the area would never return to its <br /> former coastal beach state due to the existing bulkhead,reducing artificial debris would still improve nearshore <br /> conditions. Mr. Dibb agreed to that condition and noted that any suitable stones could be reused in the <br /> reconstruction. <br /> Commissioners then debated whether temporary safety measures—such as caution tape or warning signs <br /> should be installed until construction begins. It was determined that since the property is private, such <br /> measures would be left to the homeowner's discretion. <br /> MOTION: To close an issue at 22 Triton Way with the conditions to <br /> give the both the proposed and previous plans to CZM to review and <br /> remove and reuse any boulders that may be in the water. <br /> Motion bv: Richard Sahl Seconded bv: Sandi Godfrey <br /> Vote: Motion passed by unanimous vote. <br /> (Steven Cook, Sarah Thornbrugh, Paul Colombo, Sandi Godfrey, <br /> Richard Sahl) <br /> NOI 41 Seconsett Island Road, Patricia Thompson. Proposed installation of I/A septic system. 43- <br /> (Representative: Cape & Islands Engineering, Inc.) 3357 <br /> (Mr. Colombo recused himself, noting that the property owners were personal friends.) <br /> Mr. Dibb explained that the small lot left limited options for a septic system upgrade. The existing dwelling, <br /> located very close to the road, was positioned as far as possible from the resource areas. The proposal involved <br /> replacing an outdated leach pit with a MicroFAST Innovative/Alternative (IA) nitrogen-reducing septic <br /> system. The plan included a new pump chamber and force main routing wastewater around the southern side of <br /> the house to a new leach field set at the maximum feasible distance from the resource areas. <br /> The new system would maintain a four-foot separation to groundwater—the minimum allowed under state <br /> regulations for IA systems—and meet all other Title 5 vertical separation requirements. The system would be <br /> slightly raised but would not require retaining walls or structural fill. Mr. Dibb said the project had been <br /> reviewed by the Board of Health, which granted variances for the proximity to the coastal bank and property <br /> lines, determining this layout to be the "best feasible alternative" for the constrained site. <br /> He reported that the current leach pit appeared to be failing, as it was nearly full of water and likely within <br /> the groundwater table. The proposed upgrade, he said, would significantly reduce nitrogen loading from <br /> approximately 18 kg to 13 kg per year and improve site conditions without expanding the existing two- <br /> bedroom dwelling. Supporting documentation included nitrogen and buoyancy calculations, as well as a <br /> dewatering plan using hay bales and filter fabric to manage groundwater during installation. <br /> Mr. Dibb emphasized that access to the rear of the lot would be limited, requiring temporary disturbance to a <br /> small area beside the house. The construction area would be fully restored afterward, and existing vegetation <br /> including a six-inch tree near the limit of work—would remain undisturbed. He concluded by stating that the <br /> project offered a substantial environmental improvement while staying within the site's severe spatial <br /> constraints. <br /> 24 <br />