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Part 20 TENORM guidance development

The Colorado Department of Public Health and Environment is developing guidance for implementation of 6 CCR 1007-1 Part 20 – Registration and Licensing of Technologically Enhanced Naturally Occurring Radioactive Material (TENORM). Part 20 became effective on January 14, 2021 and enforceable on July 14, 2022. The guidance will include, at a minimum, the following topics:

Draft Pipe characterization guidance and tools for comment:

Stakeholder engagement

Monthly public forums will be discontinued beginning September 2023. Public forums will occur on an as-needed basis for relaying Part 20 news, changes, or other important topics. 

Information for those meetings will be posted below as well as sent out through our existing email notification system (signup available below). 

If you have any questions regarding Part 20 in the meantime, please review the information and FAQ available in our guidance documents above or contact Maggie Schnettler at maggie.schnettler@state.co.us. 

Sign up for email alerts / Regístrate para recibir alertas por correo electrónico

Useful tools

TENORM registration form

SW-846 data evaluation (An Excel spreadsheet; please download and open with Excel to review)
This spreadsheet allows an entity to enter in TENORM concentration data to determine the upper confidence limit of the data and number of samples needed to demonstrate compliance with regulatory limits or other thresholds.

SW-846 data evaluation - expanded version to accommodate up 250 sample results (An Excel spreadsheet; please download and open with Excel to review)

Site specific background determination (An Excel spreadsheet; please download and open with Excel to review)
This spreadsheet allows an entity to enter in TENORM concentration data to determine an adequate site specific background.

Decision-making flowchart for compliance with Part 20

Summary table of Part 20 registration requirements

EPA guidance SW-846 Chapter 9

Compliance notices

Water Treatment Stakeholder Compliance Notice