Question and Submission History

Carpenter Hill Power is a battery storage facility, not a power plant that needs a continuous supply of water to generate electricity. Each battery unit has its own liquid cooling system. The project is not expected to need an ongoing supply from Charlton's drinking water system for normal operation. Cooling and water use details have not been published. The hydrology and stormwater studies are committed and will be published, and a groundwater monitoring program is committed.

Keeping the water supply and its quality protected. Normal operation is not expected to draw on the town's drinking water. Plans for erosion control, stormwater management, and groundwater monitoring are being developed. Spill containment is planned, and firefighting water is to be captured on site, not released to groundwater or drainage areas. The detailed hydrology and stormwater studies are still being completed and will be made available when they are.

Compensation. The draft Community Benefits Plan proposes that the project pay to test eligible private wells within 1,000 feet of the work limit, and that if a test shows a change linked to the site, the project pay for bottled water within 48 hours and for treatment or a replacement well. This is a draft and not yet a commitment. No promise has been made on electricity costs or accessibility. The draft plan is the place to define what counts as a negative impact, and comments on it are open into 2027.

Water use, wastewater, and chemical storage. Water use details have not been published. The facility is not a power plant and is not expected to need an ongoing supply from the town's drinking water for normal operation. Wastewater and chemical storage information has not been published. The only significant liquid in each battery unit is the coolant in its cooling system, and the coolant type has not been specified. The hydrology and stormwater studies are committed and will be published.

Stormwater, wells, and aquifers. The design being developed uses basins sized for storm events, with a commitment to no net increase in runoff and no wetland fill. A hydrogeologic study with a well inventory is underway. The draft Community Benefits Plan proposes testing wells within 1,000 feet of the work limit, with baseline testing before construction and retesting during and after it.

Emergency response. The Emergency Action Plan is being built with Charlton Fire and will be reviewed by an independent reviewer the town selects and the project pays for. It is not published yet.

Independent review and monitoring. The Energy Facilities Siting Board conducts the state review, which includes public hearings and environmental review. An independent third-party review of the Emergency Action Plan is committed. A separate independent review of the groundwater study has not been committed. Groundwater monitoring at the site is committed, with its terms in writing before construction. The state's Intervenor Support Grant Program, up to $150,000 per group for each proceeding, can pay for expert witnesses.

Financial assurance and accountability. A decommissioning bond is required before construction and stays with the project through any change of ownership. Pollution liability insurance is to be carried during construction and operation, and Massachusetts law keeps cleanup responsibility with the site's owner. Permit conditions bind any future owner. The decommissioning bond covers removal and restoration so the cost does not fall to the town.

The process. The project is in the state's required pre-filing engagement phase, with public meetings, a Citizen Advisory Committee, published records, and a comment period on the draft Community Benefits Plan that runs into 2027. Every comment receives a written response. A cumulative impact analysis, which looks at what is already in the area, is part of the state process and is in preparation.

Data center. No, this is not a data center. Carpenter Hill Power is a battery storage facility. It stores electricity from the grid and releases it when demand is high. It does not generate power or burn fuel. The only data processed is for monitoring and controlling the operation of the system.

Air, water, and noise. In normal operation the facility gives off no smoke or emissions. Water use details have not been published. The main sound in operation is a steady hum from the cooling units, inverters, and transformers, and the sound study is in progress.

Light and views. A lighting plan has not been published. Night sky, screening, and noise for close neighbors are Community Benefits Plan topics under discussion. The equipment is under 10 feet tall and set back from homes, and existing trees are kept for screening where possible. It is still industrial equipment on a rural parcel.

Taxes. The town is expected to receive standard property taxes or a payment in lieu of taxes negotiated with the town. Tax and assessment research is in progress, and no figures have been published.