PFAS TestingBack to News
July 26, 2019
Most, if not all of you, are aware by now that the DNR has identified 125 wastewater facilities across the state and requested that they perform PFAS testing (at their own cost) of influent and effluent. We have obtained permission to re-print a statement prepared by Wisconsin Rural Water Association (WRWA), and have incorporated it below. This statement incorporates to large extent the positions of the Wisconsin Municipal Environmental Group (MEG) as well. Subsequently, we believe this statement offers valuable guidance to our member facilities.
Our industry’s primary concern is processing wastewater to produce a clean effluent, effectively free of chemicals that can harm the population or the environment. While we believe that more testing is required before labelling PFAS the toxin that many have already, that testing must be performed to rigorous standards with robust methods that have been developed carefully before being approved for use in the laboratory. The only approved method for PFAS at this time (EPA Method 537.1) is designed for testing drinking water. We cannot make sound decisions in the absence of methodology designed for our unique matrix and strict adherence to universally adopted quality control requirements and acceptance criteria.
We also find that a number of critical technical issues are not being discussed include,
· Who is going to do the testing, since no lab is certified in Wisconsin (certification is not even currently offered)?
· How would a lab do the testing when there are NO methods applicable to wastewater?
· How many of these labs are even thinking that much of their equipment, tubing, vial caps, and reagent bottles are made of PTFE? (PTFE, brand name Teflon is itself a PFAS chemical)
· Given the previous concern, how much of PFAS testing performed to date is subject to contamination from the lab itself?
WRWA Alert to Members-Do Not Test for PFAS
Update on Recent PFAS Regulatory and Legislative Activities
Wisconsin Rural Water Association*
July 24, 2019
Regulation of PFAS compounds is quickly moving forward in Wisconsin at both the legislative and administrative rule levels. In response, public sector organizations, including WRWA, are working together in a coalition to represent the interests of municipal water and wastewater utilities. The group’s goals are to advocate collaboratively for science based PFAS standards, educate the public about PFAS, and communicate our concerns to DNR, the Legislature, and the Governor’s office about the potential high cost to municipal utilities of complying with the proposed PFAS ground water standards. WRWA is working collaboratively with the other groups in the coalition, including the League of Municipalities and Municipal Environmental Group (MEG) – Wastewater. WRWA has adopted the recommendations suggested by both groups below.
State Agency Regulatory Developments. On June 21, 2019, the Department of Health Services (DHS) recommended to the DNR that the groundwater quality standard for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) be set at 20 ng/l which is 20 parts per trillion (ppt). DHS also recommended a combined preventative action limit (PAL) of 2 ppt. The 20 ppt standard is significantly lower than the health advisory of 70 ppt established by the United States Environmental Protection Agency (EPA), and the PAL of 2 ppt establishes a near-zero discharge standard for groundwater despite the fact that these compounds already exist in groundwater. These are recommendations for standards that will need to go through the rule making process, which will take some time. Nevertheless, DNR is referring to these standards in the interim.
It is also important to emphasize that the standards recommended by DHS are groundwater standards; they are not surface water or biosolids standards. Surface water and land application each have different exposure pathways and different fate and transport factors than groundwater could result in a different standard. If the groundwater standards are applied to surface water and biosolids they could challenging implications for municipal wastewater treatment plants. With respect to biosolids, for example, the imposition of a limit of or approaching 2 ppt would likely foreclose the ability of many if not all plants to land apply their biosolids. DNR is moving forward with studies to develop standards for surface water, but development of this standard is a ways off.
State Legislative Developments. There are also currently a number of bills legislators have introduced relating to PFAS:
· SB 109/AB 85. Imposes a 90-day timeframe for the establishment of groundwater quality standards for PFOA and PFOS. Because DHS already released standards for these compounds on June 21, this bill is not likely to proceed at this point.
· SB 302/AB 321 Requires DNR to establish and enforce standards for a wide range of PFAS. This would include standards for drinking water, surface water, solid waste, soil and sediment, among other things. No hearing has yet been scheduled on this bill, which was introduced by Senator Miller (D-Madison) and Rep. Taylor (D-Madison). No Republican legislators are listed as co-sponsors.
· SB 310/AB 323. Rep. Nygren (R-Marinette) and Sen. Cowles (R-Green Bay) introduced this bill, which prohibits the use of firefighting foams that contain intentionally added PFAS in training.
Federal Legislation. At the federal level, amendments have been added to the National Defense Authorization Act that would require EPA to issue national regulations for PFOS and PFOA and establish a number of requirements regarding drinking water. A version of this bill recently passed in the House.
Recent Correspondence from DNR to Municipal Wastewater Treatment Facilities
DNR’s Request. On July 22, DNR began sending correspondence to about 125 municipal wastewater treatment facilities with industrial pretreatment programs and/or industries expected to be sources of PFAS discharge requesting that these facilities sample and analyze influent and effluent for PFAS. If facilities conducting such sampling and analysis obtain results showing PFAS at or above 20 ppt in the influent or effluent, DNR recommends they conduct a review of industrial users to identify potential sources of PFAS. DNR is also recommending source reduction efforts after PFAS sources have been identified. It is important to note that DNR is, at this point, requesting voluntary sampling and analysis.
Recommended Media Response. If you are asked for comment by the press or customers in the short term, we recommend the following response: “We are in the process of evaluating the Department of Natural Resources’ request. We have not made a commitment as to sampling at our facility at this time. We will continue to work with the Department on a long term response to this issue.”
Recommended Long Term Response 1. If you have a known source of concentrated PFAS from manufacturing, or a spill from materials or products such as firefighting foam, efforts should be taken to prevent those sources from entering the sanitary sewer or groundwater. This will likely include working with DNR to establish a plan for source reduction measures.
Recommended Long Term Response 2. We recommend that municipal wastewater treatment facilities without a known source of PFAS contamination do not conduct sampling and analysis for PFAS compounds at this time. Among the reasons for this recommendation are the following:
· As the letter from DNR recognizes, there are no EPA-approved methods for PFAS sampling and analysis of wastewater. Without standardized, approved methods, sampling results will not provide certainty or clarity as to the actual amount of PFAS in a POTW’s wastewater. One role of municipal wastewater facilities in the water reclamation process is to provide reliable, science-based information to DNR and its customers. Sampling and analysis without standardized and approved methods does not advance this role.
· There is no standard for surface water or land application. Obtaining a test result that has no standard to measure against is not meaningful information. The 20 ppt standard recommended by DHS is a groundwater standard that is not transferrable to surface water or land application standards. Analyzing wastewater influent and effluent against a groundwater standard will result in misleading information.
· Municipal wastewater treatment facilities are not original sources of PFAS, do not add PFAS to waste streams during the treatment process, and do not have the capability to remove PFAS during the treatment process. For those communities without a known source of PFAS, the PFAS in wastewater is likely to be coming from a wide array of domestic and industrial dischargers that may have a limited ability to reduce the amount of PFAS in their wastewater discharges.
For these reasons, Wisconsin Rural Water Association recommends that municipal wastewater treatment facilities without a known source of PFAS contamination do not conduct sampling and analysis for PFAS compounds at this time. We recognize that every community will have unique circumstances it must evaluate when making this decision, and we would be happy to discuss those circumstances or any questions further at any time in this process.
*Wisconsin Rural Water thanks Municipal Environmental Group (MEG) - Wastewater for assistance in drafting these recommendations.
Wisconsin Rural Water Association