Planning board approves Audi dealership addition after engineer assures protection of existing sewer pipe

The Planning Board approved a site plan for an addition and repaving at 252 Andover Street (Audi) after the applicant’s engineer described construction safeguards for an existing reinforced concrete sewer pipe that runs near the addition footprint. Engineer Rick Salvo said the 42‑inch reinforced concrete pipe and a downstream 60‑inch segment are robust and that the proposed building footings would not undermine the pipe. Salvo told the board the contractor will expose and flag the pipe in the area within roughly three feet of the footing and will hand‑excavate near the pipe to avoid undermining it. The engineer also agreed to add extra erosion controls, including another row of compost socks at the limit of work and construction fencing, and to equip catch basins with protective fabric (“salt sacks”) during construction so excavation fines do not enter the storm system. Salvo said the addition is being built over an existing paved parking area and that CM and B will provide a contingency plan should any unforeseen damage occur to the pipe. After the engineer described the mitigation measures and said the soils and spread footings do not indicate a settling risk to the pipe, the board voted to approve the project with the condition that the petitioner address and resolve four items in a late Department of Public Services memo dated July 17, 2025. In discussion, staff noted this matter would return to Conservation Commission for conditions related to some of the off‑site work prior to construction.