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DNR lab-cert program to adopt EPA Method 1633a for most PFAS testing outside drinking water
Summary
At the Jan. 23 Remediation and Redevelopment External Advisory Group meeting, DNR lab-cert staff said the department is moving to EPA Method 1633a for PFAS analysis in non-drinking-water media, expanding reported compounds and tightening quality controls; labs and data systems will need updates.
Tom Trainer, laboratory certification program, Department of Natural Resources, told the Remediation and Redevelopment External Advisory Group on Jan. 23 that the DNR is moving to EPA Method 1633a for PFAS testing in media other than public drinking water.
Trainer said EPA 537.1 and EPA 533 remain the approved methods for public drinking water; the 1633a method covers about 40 PFAS compounds and will expand the set laboratories report from the roughly 33 compounds previously used under Wisconsin guidance. He said seven compounds are newly reported under 1633a and that many laboratories have already started reporting to the new method or will do so…
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