Conservation commission approves RDA for upgraded septic system at 42 Lake Drive

Matthew Punchin of SK Design presented an RDA to replace a failed septic system at 42 Lake Drive and described Title 5 constraints, proposed components and site limitations. He said the house will remain a three‑bedroom residence; the proposal uses an alternative 'Jack' treatment tank with aeration and media for pretreatment, a pump chamber and a pressure‑dosed low‑flow distribution system into a mounted septic field constructed with Title 5 sand and a 2–3 foot mound.

Punchin explained site constraints: a well in front of the property constrains placement and the system must remain at least 100 feet from the well, leaving the back‑yard as the viable area for the septic mound. He said erosion control measures (silt fence, straw wattles) will surround the work area during construction and that temporary machine access will be required. On costs, Punchin offered a rule‑of‑thumb estimate he uses with clients: "assume a septic system costs 10 grand per bedroom nowadays," and noted the alternative tank and pump equipment add to the cost.

After questions about grading, dewatering and whether town sewer might be available, a commissioner moved to approve the RDA and a second was given. During roll call, commissioners indicated assent and the commission approved the filing. Commissioners also later approved a standard three‑year extension for a Sparks property order of conditions.

The commission recorded no further conditions in the meeting transcript; staff will prepare permit paperwork and certificates of compliance as usual. "We have received Tritown Health approval," Punchin said, noting local health board confirmation of treatment suitability.