On February 2nd, Pace® delivered a live webinar titled “A Deep Dive into the Third Revision of Draft Method 1633.” This webinar was widely attended, and as anticipated, we received a number of questions using the Q&A feature on the portal. Since there were too many questions to answer in the time allotted and the questions received are relevant to the entire PFAS stakeholder community, we decided to create a downloadable FAQ.

Even as EPA Draft Method 1633 goes through revisions, it’s already become the go-to method for many regulatory programs. For example, the U.S. EPA strongly encourages Draft Method 1633 for NPDES (National Pollutant Discharge Elimination System) permitting. The Department of Defense calls for Draft Method 1633 when testing AFFF (Aqueous Film-Forming Foam) and F3 (Fluorine-Free Foam) for PFAS. At least twelve states have even updated their lab accreditation programs to include Draft Method 1633.

A Closer Look: EPA Draft Test Method 1633