Planning board delays decision on proposed medical cannabis cultivation at 482 Waterville Road, asks for air, waste and water documentation

The Town of Norwalk Planning Board continued its review of an application to convert a former storage/chicken-barn at 482 Waterville Road into a wholesale medical cannabis cultivation facility, saying it needed more documentation on air emissions, hazardous-soil disposal and local water supply before it could find the proposal compliant.

Staff summarized the application: the owner proposes to convert two levels of an existing three-level storage building to medical cannabis cultivation for wholesale only, to use an existing residence on the property to house some workforce, and to provide up to eight registered caregiver spaces. The proposal triggered site-plan review because it is a change of use from storage to cultivation and involves chemical-handling and waste considerations, staff said (Staff member).

Neighbors and several board members raised questions about chemical-handling and disposal after reviewing an SDS included in the application that used the word “danger.” A resident asked where spent growing media and empty chemical containers would be disposed of; a board member said the town needs to know before it accepts the application. Staff suggested the board could make a soil- and waste-disposal plan and a current contract with a qualified disposal vendor a condition of approval (Resident; Committee member; Staff member).

The board also flagged air-pollution and ventilation concerns. Members asked the applicant for manufacturer documentation or an industry-standard analysis that quantifies whether the fertilizer or nutrient products used in concentrated form could become airborne at levels that exceed statutory exposure limits, and whether the proposed carbon filtration and heat-pump exhaust would reliably prevent offsite emissions. One board member asked for documentation from the product manufacturer or an OSHA/exposure-limit summary; board members suggested the possibility of outdoor monitoring or an interlock to shut down exhaust if levels exceeded thresholds (Committee member; Resident).

Water availability and wells were another open item. The applicant reported two existing wells on the property and said condensate from heat pumps would be reused; neighbors and members requested a written report from a well professional mapping the two existing wells, confirming capacity and showing distances to adjacent wells before the board revisits groundwater-related findings (Committee member; Presenter).

After discussion, motions to find some criteria compliant were withdrawn so the applicant could provide additional information. The board requested at minimum: (1) manufacturer statements or exposure data for the nutrient/chemical products used, (2) a written soil/waste-disposal plan plus a contract with a qualified hauler, (3) a written well/water-resource report from a licensed well professional and mapped well locations, and (4) contact/ownership details for the LLC managing the site to ensure a deliverable point of contact. The board agreed to continue the application to its next regular meeting on Aug. 6 to allow the applicant time to supply those materials (Staff member; Chair).

What happens next: the applicant agreed to seek manufacturer documentation and to identify a waste-disposal contractor; the board will expect the contracted disposal plan, well report and filtration/ventilation documentation in advance of the Aug. 6 meeting so members and the public can review the materials. No final vote or approval was recorded at this meeting.