The Norwood Conservation Commission voted on Jan. 8 to close an enforcement order concerning an oil sheen observed at Hawes Pond after the responsible party, WT Ridge, completed investigative work requested by the commission and staff.

Conservation staff reported WT Ridge conducted inspections of pipes and catch basins on the company’s property and did not identify an on-site source for the oil sheen. Staff said WT Ridge found some sediment and tree roots in a pipe leading from a sports field — a location outside WT Ridge’s limit of work and under town maintenance jurisdiction — but no conclusive source for the sheen on the pond.

Based on WT Ridge’s investigative report and staff review, the commission voted to close the enforcement order. Commissioners voted in favor to close the matter.