Combustion turbine schematic

Confidential Client – Combined Heat & Power

Services Used
At a Glance Client
Design/Build Engineering Firm (Direct), Global Manufacturer (Indirect)

Project Size
5 MW Natural Gas Turbine/Heat Recovery Steam Generator; 9 MMBtu/hr Duct Burner; 2 x 600 HP Natural Gas Boilers; 500 kW Black Start Emergency Generator



A global manufacturer faced growing demand for efficiently produced electricity and steam to serve its Massachusetts campus. The campus houses the company's manufacturing, warehousing, and corporate offices, and is supported by approximately 1,000 employees. Additionally, in 2019. the company set an ambitious corporate responsibility goal of achieving carbon neutrality by 2050. To address both concerns, the manufacturer underwent a renovation project to upgrade its electric and heating infrastructure. This included replacing older boilers with a gas combustion turbine, which is a lower emitter of carbon dioxide and nitrous oxides.


Epsilon Associates led the state air permitting for the project by preparing a non-major Comprehensive Plan Application (nmCPA), a type of air quality permit, for the Massachusetts Department of Environmental Protection (MassDEP). The process, which started in 2020 and resulted in permit issuance in 2021, involved conducting noise and air dispersion modeling to mitigate any potential risk of air and noise pollution affecting the surrounding community.

Epsilon additionally assisted in the air permitting strategy for the replacement of the older boilers with a more efficient gas combustion turbine.


The upgraded infrastructure, which Epsilon provided permitting assistance for, is poised to significantly reduce the site's energy use carbon emissions, which will aid in the company's wider carbon neutrality goals. It will also more efficiently distribute energy and steam.

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