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Tilton board restores groundwater and soil testing in solar zoning ordinance after extended public exchange
Summary
After a lengthy presentation by project consultants and extended public comment, Tilton trustees voted to amend the draft solar zoning ordinance to reinstate baseline groundwater and soil testing and to require testing before and after construction. Consultants argued the science shows limited risk from galvanized pile alloys; residents and some trustees pressed for testing and monitoring language to remain in the ordinance.
Trustees spent the largest portion of the meeting on a proposed zoning ordinance and municipal review of a utility-scale solar proposal. Company representatives and consultants presented technical material about modern utility-scale solar construction and galvanized pile materials; one presenter described extensive industry experience and pressed that the scientific record does not support large-scale zinc migration from properly installed galvanized piles.
Residents raised repeated concerns about groundwater and potential zinc migration, noting a local zinc mine and high seasonal water tables in parts of the project area. A geologist introduced in the meeting as Mr. Dunn advised that background testing is important to establish pre-construction water quality, and recommended documenting conditions before construction. Multiple trustees and residents urged that testing requirements be restored to the ordinance and that the developer commit to baseline and post-construction sampling and to reasonable monitoring. The board moved to add the stormwater and soil/water testing language back into the draft ordinance and approved an amendment that leaves the amended ordinance unsigned until editorial changes are finalized.
A company technical representative said the firm would accept testing if required but also cautioned about the practical limits of attributing long-term water-quality changes to a single new installation in an aquifer that receives regional inputs. The board recorded the amendment by motion and roll call and instructed staff to update the ordinance text to reflect the changes discussed.
