Towamencin advances stricter data center ordinance with 1,000-foot setback, addresses noise concerns

Towamencin Township Supervisors have unanimously voted to advertise a significant amendment to their recently adopted data center ordinance. The proposed changes introduce a stringent 1,000-foot setback from residential areas and "sensitive receptors," alongside more rigorous requirements concerning utility capacity, noise levels, emergency preparedness, and facility decommissioning. This action paves the way for a public hearing and potential adoption of the updated regulations.

The initial ordinance, passed on April 29, permitted data centers by conditional use in the LI Limited Industrial zoning district, setting basic standards. The new amendment incorporates recommendations from various bodies, including the Montgomery County Planning Commission and township residents. Officials emphasize that these stricter rules are a proactive measure, designed to establish comprehensive protections before any specific data center project is formally proposed within the township.

Key provisions of the amendment include mandatory use of public utilities with proof of sufficient capacity, submission of an energy usage plan detailing electricity demand and sources, and efforts to reduce reliance on new electric generation. It allows for wind and roof-mounted solar power but prohibits private on-site electrical generation, except for emergency backup generators, which are barred from "peak shaving" or supplying the wider grid. Residents like Barry Kenyon and Joe Silverman voiced concerns about this restriction, suggesting a need to allow small modular nuclear reactors or other private power systems to alleviate grid strain. Supervisor Kofi Osei, however, noted that allowing nuclear generation might be beyond the scope of a local zoning ordinance without a specific applicant.

Noise remains a critical focus, with the amended ordinance setting strict limits of 45 dBA during daytime and 40 dBA at night, along with C-weighted standards (60 dBC/50 dBC) to address low-frequency sound from cooling equipment. Applicants will be required to conduct pre-construction sound modeling and post-construction studies every two years. Residents like Joe Silverman also suggested researching a dBZ standard for individual frequency bands. Other requirements include comprehensive emergency response, electronic waste, and thermal impact mitigation plans, as well as specific parking mandates and decommissioning provisions, with Vice Chair Vanessa Gaynor advocating for a decommissioning bond. Supervisors have requested further research into dBZ requirements, generator testing limits, and bonding for future amendments.