The most critical agenda item was the proposed expansion of Costco Wholesale at the Newbury Street location. The project, presented by wetland scientist Joseph Orzel and supported by engineer April Fero, involves significant structural modifications, including the extension of the existing warehouse by 12,300 square feet on the south end and 20,000 square feet on the north end. These expansions partially encroach into the 100-foot buffer zone, raising questions about environmental impacts and compliance with local regulations. Orzel clarified that the work would occur within previously developed and degraded areas, emphasizing that the existing conditions are primarily paved.

A notable component of the proposal is the plan to reduce impervious surface area by approximately 3,000 square feet through the installation of landscaped islands in the parking lot. This reduction is intended to enhance drainage and overall environmental management. Commission members sought clarification on the design and purpose of these landscaped areas, questioning the rationale behind the planting plans. Orzel assured the commission that the drainage improvements would be substantial, with new catch basins and water quality units to be installed.

The commission expressed concerns about the implications of increased drainage capacity due to additional parking and the project’s adherence to regulatory standards. Orzel reassured the members that the project aims to improve the site’s drainage compared to existing conditions. He detailed the current and proposed drainage systems.

The meeting included a discussion on the maintenance of the stormwater basin, referencing a prior order of conditions. The commission emphasized the importance of maintaining these systems to prevent environmental degradation.

Another topic was the timing and coordination of the demolition of existing structures, such as a gas station and former restaurant, which are part of the broader project. The commission expressed apprehension regarding the management of debris and excavation materials, particularly their potential impact on local wetlands. While demolitions are outside the jurisdictional resource area and have received site plan approval, the commission underscored the need for erosion control measures to prevent contamination.

The commission requested a more definitive construction and demolition schedule, along with detailed erosion control plans. It was confirmed that an overall erosion control plan had been submitted and approved, incorporating provisions for filter bags and sediment basins. Despite the approval, specific timelines for demolition activities remain undetermined.

Public concerns were raised about the environmental impact of underground structures, such as septic systems or fuel tanks, during demolition. The potential for contaminants to migrate to wetlands was acknowledged, with the commission committing to ensure adherence to protocols that prevent such occurrences.

The commission confirmed plans for regular site visits to oversee erosion control measures and address any emerging issues. Following thorough discussions, the commission moved to close the public hearing and approved a waiver allowing work within the 50-foot no-build zone. An order of conditions for the project was granted, with provisions for the commission to be notified prior to commencement of work.

In addition to the Costco proposal, the commission addressed other agenda items, including a request for a certificate of compliance for a property on Dodav Drive. The applicant agreed to remove a sport court, reestablish grass, and install a pollinator garden as part of their compliance efforts. An enforcement order was issued to ensure these actions are completed before the certificate is reviewed, with a public hearing continued until April 2026.

The meeting also reviewed a request for a certificate of compliance for a property on Water Street, which was closed out as the project had been redirected with no work commenced. Additionally, a request for determination of applicability for new gas service installation at the same location was discussed, resulting in a negative determination.