https://19january2021snapshot.epa.gov/radiation/what-derived-concentration-guideline-level-dcgl_.html
What is a Derived Concentration Guideline Level (DCGL)? | Radiation Protection | US EPA
Sep 1, 2020 - The Derived Concentration Guideline Level (DCGL) is a radionuclide-specific surface or volume residual radioactivity level that is related to a concentration...
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