Guidance for Waste Sites

The NHDES Hazardous Waste Remediation Bureau first requested that waste sites begin sampling for PFASs as part of groundwater management permits and the investigation of certain contaminated sites in November 2016. The types of sites included:

  • All active hazardous waste sites managed by the NHDES Hazardous Waste Remediation Bureau (HWRB) (including, but not limited to, sites with active New Hampshire Groundwater Management Permits and New Hampshire Groundwater Release Detection Permits, and federal Superfund sites).
  • All sites undergoing environmental site assessment activities for which the results will be reported and submitted to the Waste Management Division (WMD) for review, such as Brownfields sites, including, but not limited to, sites with a history indicating that industrial processes may have used PFAS-containing products, and sites where Class B firefighting foam [e.g., aqueous film forming foam (AFFF)] may have been used for training exercises or to extinguish a fire.
  • All landfills (lined, unlined, active, and/or closed) that are subject to groundwater monitoring requirements.

In May 2017, waste sites were asked to complete an initial screening for the presence of PFAS per the provisions of the NH Code of Administrative Rules, Chapters Env-Or 600 and Env-Or 700. The purpose of this sampling is to determine whether any drinking water sources may be at risk associated with releases from the site. A letter which clarifies which sites need to test for PFAS was issued in October 2017 (PFAS Sampling Clarification Ltr 10_19_17).

Sampling Guidance

NHDES has provided guidance documents for facility/property owners, consultants and analytical laboratories. Because of the potential presence of PFASs in common consumer products and in equipment typically used to collect groundwater samples, special handling and care must be taken when collecting samples for analysis.

Sampling and Analysis FAQs
Sampling restrictions
Direct Contact-Based Soil Screening Value for PFOS
Direct Contact-Based Soil Screening Value for PFOA
Laboratory list and testing protocols
Guidance for Recommended Follow-up Actions
Hazardous Waste Remediation Bureau Master Quality Assurance Project Plan (QAPP)
Reporting data to the NHDES Environmental Monitoring Database (EMD)
USEPA Technical Advisory for Labs