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Board accepts settlement‑tank modification at 107 Stuart Neck, approves once‑a‑year testing at 10 Portwood
Summary
After hearing technical research, the board approved adding a third settlement chamber at 107 Stuart Neck instead of an IA/UV mandate; the board also granted a homeowner's request to reduce testing for an innovative treatment system to an annual August test.
The Dennis Board of Health voted to accept a modification to previously approved septic plans for 107 Stuart Neck Road after engineering research showed an added settlement chamber could reduce suspended solids and provide viral attenuation without chlorination.
Bob Carey (speaker 8) told the board his outreach to suppliers and experts indicated a third 1,000‑gallon settlement tank after the existing two chambers would significantly improve suspended‑solids settlement and obviate the need for a chlorinating disinfection unit in that setting. Carey said the parcel is large, nitrogen loading is low and the proposed additional tank would avoid potential biomat damage from chlorine. The board voted to accept the modification and to eliminate the prior condition number 8 while keeping other conditions in place (motion and memorandum dated 09/04/2024).
Separately, the board approved a request from homeowner Greg Galanis (speaker 13) at 10 Portwood to reduce testing and service requirements for an innovative and alternative treatment system. After reviewing test data staff described as “excellent,” the board granted reduced testing to once a year in August but maintained regular service requirements and recommended the owner have tests done before seasonal closure each year.
The board asked applicants to file updated final plans and indicated staff will verify compliance with the conditions before permitting or occupancy.
