An EPA validated method, Method 537.1 was developed to replace Method 537 and is commonly used for drinking water compliance. In addition to analyzing for the 14 compounds covered by Method 537, Method 537.1 also analyzes for four replacement PFAS*, including 11Cl-PF3OUdS, 9Cl-PF3ONS, ADONA, and HFPO-DA.
*Replacement PFAS are short-chain, potentially less toxic PFAS compounds used to replace PFAS with known toxicity, such as PFOA and PFOS.
Method 533 expanded the number of short-chain PFAS compounds that can be analyzed for in drinking water samples. Method 533 does not replace Method 537.1, but together, the tests can be used to analyze for 29 PFAS compounds. Method 533 is also commonly used for drinking water compliance, and both Methods 533 and 537.1 will be required for UCMR 5 compliance.
Published as final in June of 2021, Method 8327 is designed for non-potable waters, including surface water, groundwater, and wastewater. Pace® will begin offering this method in early 2022 and will seek certification when it becomes available. However, as currently defined, Method 8327 has a number of limitations, and we will continue to offer PFAS by Isotope Dilution and Draft Method 1633.
Published in August of 2021, Draft Method 1633 closely resembles PFAS by Isotope Dilution and can quantitate 40 compounds across a wide range of solid and aqueous matrices. Method 1633 will likely replace all laboratory-specific SOPs as well as state and DOD-specific guidance and methods. Method 1633 will also play a vital role in the EPA’s efforts to study, monitor, and regulate PFAS in nearly all matrices and regulatory programs except drinking water.
OTM (Other Test Methods) are EPA test methods that have not yet gone through the agency’s rule-making process, but are urgently needed to support agency initiatives. OTM 45 was issued as draft in January 2021 by the EPA’s Emission Measurements Center (EMC) to promote consistency and best practices when sampling and analyzing PFAS in stack emissions. Pace® uses OTM 45 to analyze stack emissions for its industrial clients.
We’re certified/accredited by NELAC, ISO, DOD, DOE, and in every state with a PFAS lab certification program.
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We can test for PFAS in both solid and aqueous matrices, including potable and non-potable waters, soils, and biota.
We’re on the leading edge of science, working with EPA, DOD, ASTM, and others to develop new methods for analyzing PFAS.