Free Lesson: The #1 Device Performance Mistake that puts your certification at risk

Watch this 10-minute lesson and learn the simple fix most radon professionals miss — pulled straight from the NRPP-approved course. You'll learn

  • How MS-QA 2023 defines duplicate frequency — and the threshold most pros unknowingly miss
  • The difference between duplicates and cross-checks, and when each one is required under the standard
  • What the Lower Limit of Detection really means
  • How to use the QC chart template you already downloaded to track and evaluate your duplicates automatically

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Jason Sadowski, CIH

Health Physicist & Certified Industrial Hygienist with 15+ years helping radon professionals build audit-ready QC systems.