Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Saint-Gobain Stormwater Sample Data Submitted

Saint-Gobain recently submitted data for samples collected as part of the Stormwater and Surface Water Source Investigation. The submittal can be viewed here: http://www4.des.state.nh.us/IISProxy/IISProxy.dll?ContentId=4744493. [The blog post “Elevated Levels of PFAS in Stormwater at the Saint-Gobain Facility (Fourth Post in a Series)” posted on September 27, 2018, provides a general overview of the Stormwater Investigation Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Sampling at Other Properties (Eighth Post in a Series)

(This post is the eighth in a series describing the Site Investigation activities that are taking place or will be in the areas around the Saint-Gobain facility.) A preliminary Groundwater Management Zone (GMZ) was outlined in the March 2017 Consent Decree between Saint-Gobain and the State of New Hampshire. This preliminary boundary is based on Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Stormwater System Improvements Planned at Saint-Gobain Facility (Seventh post in a Series)

(This post is the seventh in a series describing the Site Investigation activities that are taking place or will be in the areas around the Saint-Gobain facility.) Stormwater generated at the Saint-Gobain facility is collected in a below ground piping network and discharged at an outfall on the Merrimack River. Water has been observed discharging Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Dust Accumulating on Exterior of Condo Complex Tested for PFAS (Sixth Post in a Series)

(This post is the sixth in a series describing the Site Investigation activities that are taking place or will be in the areas around the Saint-Gobain facility.) NHDES representatives sampled a gray soot-like substance accumulating on exterior window sills and thresholds of the Webster Green Condominiums in Merrimack, NH on April 12, 2018. Analytical results Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Fish Tissue Sampling Requested Around Saint-Gobain Facility (Fifth Post in a Series)

(This post is the fifth in a series describing the Site Investigation activities that are taking place or will be in the areas around the Saint-Gobain facility.) Based on discussions with NH Fish and Game, NHDES understands that Dumpling Brook (located south of the Saint-Gobain facility) is considered a “high-quality wild brook trout stream” due Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Elevated Levels of PFAS in Stormwater at the Saint-Gobain Facility (Fourth Post in a Series)

(This post is the fourth in a series describing the Site Investigation activities that are taking place or will be in the areas around the Saint-Gobain facility.) Testing completed in 2017 indicated the presence of PFAS in stormwater generated at the Saint-Gobain facility and in samples collected from nearby surface water bodies.  Saint-Gobain is completing Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Dye Test at Stormwater Outfall on Merrimack River (Third Post in a Series)

          (This post is the third in a series describing the Site Investigation activities that are taking place or will be in the areas around the Saint-Gobain facility.) Stormwater from the Saint-Gobain facility is conveyed in underground piping and discharges to the Merrimack River at a stormwater outfall east of the Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Elevated Levels of PFOA Detected in Groundwater Adjacent to the Saint-Gobain Facility (Second Post in a Series)

(This post is the second in a series describing the Site Investigation activities that are taking place or will be in the areas around the Saint-Gobain facility.) At the request of NHDES, Saint-Gobain sampled three monitoring wells that were previously installed on the property immediately adjacent to their facility (703 Daniel Webster Highway). The sample Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Site Investigation Activities Around Saint-Gobain (First Post in a Series)

For the past 2½ years, NHDES’ focus in this investigation has been to identify immediate receptors who might be drinking contaminated water, and get them an alternate water source, primarily through a connection to a public water system. While the work to extend several public waterlines is under way, we are also focused on Saint-Gobain Read More

Final Proposal Packet, including Summary of Public Comments with NHDES Responses, June Technical Report, Cost and Benefits, and AG Letter

Welcome

Welcome. This website will be used to update interested parties on NHDES’ current investigation into the presence of Per- and Polyfluoroalkyl Substances (PFAS) in New Hampshire. You can access our previous webpage for archived information:  https://www.des.nh.gov/organization/commissioner/pfoa.htm.