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Commission approves denitrifying septic replacement for Alexander property; Board of Health already approved plan
Summary
Collins Civil Engineering presented a gravity-fed denitrifying system to replace a failed Title 5 system; commission closed the hearing and approved the project with standard order conditions after questions about test pits, buffers and endangered-species screening.
Peter Lyons of Collins Civil Engineering told the commission that the proposed replacement for a failed Title 5 system at 2 A Street uses a gravity-fed denitrification unit (rated 600 gallons per day) and a roughly 12.8×25 ft leaching field. Lyons said the leaching field will be at least 58 feet from the nearest wetland to the northeast and 103 feet from the southern resource; all work will be located on existing lawn and will largely return to lawn conditions when complete.
Lyons said the Board of Health has approved the design. Commissioners asked whether work had begun (Lyons said only test pits and staking) and whether the property is in an ACEC; Lyons read a plan note that the site is not in an ACEC and said the risk to native species is low. The applicant described sedimentation control (12‑inch straw waddle) around the paved driveway access.
After questions about access, endangered-species screening and the limits of grading, the commission closed the hearing and voted to issue the standard order of conditions provided by the conservation agent. The chair reminded the applicant not to start work until they receive documentation from the agent.
The permit decision authorizes replacement of the failed septic system with the proposed denitrifying gravity system, subject to the standard conditions the agent provides.
