Document Library
Every public project document in one place, searchable, categorized, and written in plain language. Every document includes a "Why this matters to you" summary.
Project Site Plan
Engineering site plan showing the layout of Megapack units, access roads, setbacks, fencing, stormwater features, and landscaping within the 15-acre BESS area.
Why this matters to you: This shows exactly where we will place everything on the property, and how far it sits from neighbors.
Critical Issues Analysis
A comprehensive early-stage assessment of the site to identify any critical environmental, structural, or regulatory constraints before development.
Why this matters to you: This shows the due diligence performed to ensure the site is actually viable and safe for a project of this scale.
Site Elevation Map
Topographical map detailing the elevation changes, grading requirements, and natural contours of the Carpenter Hill site.
Why this matters to you: This helps you understand how the facility will sit on the landscape and how natural terrain might provide visual screening.
Preliminary Wetlands Index
Initial mapping and assessment of wetland resource areas on and adjacent to the property.
Why this matters to you: This shows exactly where sensitive water resources are located so you can see how the project is designed to avoid them.
Site Aerial Map
High-resolution aerial imagery overlay showing the project footprint in relation to surrounding properties, roads, and vegetation.
Why this matters to you: This gives you a real-world, bird's-eye view of the property so you can see its exact context within the neighborhood.
Tesla Megablock / Megapack 3 Technical Specifications
Detailed technical data for the Tesla Megablock / Megapack 3 battery energy storage unit, including dimensions, capacity, safety features, and performance specifications.
Why this matters to you: This is the product data sheet for the actual equipment that would be installed on Carpenter Hill.
NFPA 855: Plain Language Summary
A plain-language summary of the National Fire Protection Association Standard 855 for battery energy storage system installation, covering siting, fire suppression, ventilation, and emergency response requirements.
Why this matters to you: This standard is the fire safety rulebook for battery storage. This summary explains what it requires in terms anyone can understand.
UL 9540A Testing: What It Means
Explainer document describing UL 9540A fire safety testing for battery energy storage systems, what the test evaluates, and what the results mean for the Carpenter Hill project.
Why this matters to you: UL 9540A is the gold standard for battery fire safety testing. This explains what it tests and why it matters.
Emergency Response Planning Framework
Framework for the site-specific emergency response plan being developed with Charlton Fire Chief Rob Barton, including incident command, notification, and mutual aid protocols.
Why this matters to you: This outlines how Charlton Fire will respond if there's ever an incident, and the training they'll receive.
2024 Climate Act (Chapter 239): Summary
Plain-language summary of the 2024 Climate Act's provisions for energy facility siting, including the new consolidated permit process under the EFSB.
Why this matters to you: This is the state law that created the permit process this project is using. Understanding it helps you know your rights.
980 CMR 16.00: Consolidated Permit Regulations Overview
Overview of the EFSB's 980 CMR 16.00 regulations governing the consolidated permit application process, pre-filing requirements, and community engagement obligations.
Why this matters to you: These rules govern the project and outline the requirements for community engagement.
Medway Grid Battery Project (Approved Reference Project)
Official Massachusetts Energy Facilities Siting Board (EFSB) docket and approval information for the Medway Grid Battery Project, a successfully permitted facility.
Why this matters to you: This provides a real-world example of a similar battery storage project that has already successfully navigated the full state approval and permitting process.
Cranberry Point Energy Storage (Approved Reference Project)
Official Massachusetts Energy Facilities Siting Board (EFSB) docket and approval information for the Cranberry Point Energy Storage facility.
Why this matters to you: This provides another real-world example of a large-scale battery storage project that has successfully navigated the state approval and permitting process.