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New Hampshire Department of Environmental Services

Media Center

DATE: October 8, 2019
CONTACT: Jim Martin, (603) 271-3710

Public Hearing on Draft Air Permit for Air Pollution Control Equipment at
Saint-Gobain Performance Plastics and Information Meeting to Provide Update on
Southern New Hampshire PFAS Investigation

Concord, NH – The New Hampshire Department of Environmental Services (NHDES) invites the public to a public hearing on a draft air permit related to the installation and operation of air pollution control equipment at Saint-Gobain Performance Plastics Corporation in Merrimack.  Following the conclusion of the public hearing, NHDES staff will provide an update on the Saint-Gobain site investigation activities and the response to assessing drinking water impacts relative to the new Per- and Polyfluoroalkyl Substances (PFAS) drinking water standards (MCLs) and Ambient Groundwater Quality Standards (AGQS). Residents from all of the impacted communities (Bedford, Litchfield, Londonderry, Manchester and Merrimack) are encouraged to attend. 

Public Hearing and Meeting Information:
Tuesday, November 5, 2019, 6:00 p.m.
James Mastricola Upper Elementary School (JMUES) All-purpose Room
26 Baboosic Lake Rd, Merrimack, NH 03054

Background on draft air permit:
NHDES has prepared a draft air permit along with supporting documents related to the installation and operation of air pollution control equipment at Saint-Gobain Performance Plastics Corporation, 701 Daniel Webster Highway, Merrimack, New Hampshire. Pursuant to RSA 125-C:10-e, Requirements for Air Emissions of Perfluorinated Compounds Impacting Soil and Water, Saint-Gobain submitted an application for the construction and installation of a regenerative thermal oxidizer as best available control technology for emissions of perfluorinated compounds and precursors.

As a requirement of the air permit regulations, NHDES published a public notice inviting comments on the draft permit in the New Hampshire Union Leader and the Merrimack Journal on October 4, 2019. Written comments filed with the Director in accordance with Env-A 621.06, and received no later than 4:00 PM on Monday, November 18, 2019, shall be considered by the Director in making a final decision.  Written comments on the draft permit can be submitted by mail at the address below or sent via email to Catherine Beahm ( All comments received prior to the deadline will receive the same thorough consideration. Attendance at the public hearing is not required to submit written comments.

A public hearing on the draft air permit has been scheduled for Tuesday, November 5, 2019 at 6 p.m. at the James Mastricola Upper Elementary School. Due to the special nature of the hearing, the Commissioner has designated a Hearing Officer to preside at the hearing. The Hearing Officer will ensure the orderly presentation of public comments and will ensure that everyone who wishes to comment will be allowed.

The application and draft documents are on file with the Director, New Hampshire Department of Environmental Services, Air Resources Division, 29 Hazen Drive, P.O. Box 95, Concord, NH 03302-0095, (603) 271-1370. Information may be reviewed at the office during working hours from 8 a.m. to 4 p.m., Monday through Friday. Documents related to this action can also be accessed electronically through the One-Stop Data and Information portal at the following links:

Application: Adobe Acrobat Reader Symbol
Draft Permit: Adobe Acrobat Reader Symbol
Draft Permit Application Review Summary: Adobe Acrobat Reader Symbol
Draft Calculations: Adobe Acrobat Reader Symbol
Modeling related to the Permit Action: Adobe Acrobat Reader Symbol and Adobe Acrobat Reader Symbol
Public Notice: Adobe Acrobat Reader Symbol

For more please contact Jim Martin, NHDES Public Information Officer at or 603 271-3710.



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NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

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