C-8-101 - RRNC Practices: An Industry Discussion (CERTI-500 / NRPP 135)

This course is comprised of two separate sessions recorded at the U.S. EPA, Region VIII’s Radon Stakeholder’s Meeting in Denver Colorado in April 2010.
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This program discusses current practices and alternatives to the installation of radon control techniques in building construction and incorporates valuable comments from seasoned mitigation contractors, engineers and school maintenance personnel who attended this highly interactive program.

There is approximately 8 hours of coursework, including video, publications, and online quizzes that are taken as you progress through the course (not timed and may be taken unlimited times).  There is no time limit for taking the course, and even after completion you continue to have access to the course in order to refer back to resources.

CERTI students also have access to business tools such as sample contracts, and warranties.  We are also available by phone during and after the course for any questions concerning the course or radon situations you come across on the job.

Note: your name, email address and an indication of passage of this course may be shared with national or state certification agencies for verification of completion.

Course Includes:

  • Video
  • Online Quizzes
  • Downloadable Course Certificate
  • 8 Category 1 CE Credits


  • Download/Streaming - No course materials will be shipped - everything you need is available to access and download online.


Tuesday, 29 December 2020
Rich said: I enjoyed the back and forth with the attendees. It made it more interesting hearing from professionals in the industry actually doing the work.
Jesse Graybear
Tuesday, 08 December 2020
Robert said:
Meagan Shear
Friday, 04 December 2020
Michel said:
Jason Wheeler
Thursday, 03 December 2020
Don said:

It's nice to be able to do these on line, even for a 83 year old guy that's a little behind on computer skills.

You need to sort out the people that have building experience and people who have no on the job experience.

You do a good job of that.

James B Hahner
Sunday, 29 November 2020
John said:
Dan Derbes
Thursday, 27 August 2020
Wolfgang said:

I appreciate the simplicity of the course structure (video / document followed by a quiz) and thought the material was presented in a helpful and stimulating way.

Steve Kosbau
Tuesday, 26 May 2020
Joey said: I recommend this course 5/5
Robert King
Tuesday, 26 March 2019
Gary said:


Murray Dyck
Saturday, 19 January 2019
Tim said:

Clear and concise.

Steven B. Kurtenbach
Saturday, 22 December 2018
Marur said:

I am very satisfied with the course materials and contents as well as the video presentation of topic 1 thru 4. Listening to the highly technical discussions among the professionals who are directly involved in the installation of Passive and Active sub slab Radon Resistance system has enlarged my knowledge to a higher level.

Anna Gross
Monday, 29 October 2018
David said:

Great refresher

Stephen A. Donnelly
Monday, 30 July 2018
Mark said:

The instructor is very well spoken, commands the class room well. Easy to watch and stay along with him.

Tuesday, 08 May 2018
Michael said:

The course format is easy to follow and can be done one section at a time.

Michael Andert
Thursday, 29 March 2018
Brett said:

The course was informative about appendix F, some of the video was too long, but all information was useful in practice!

Mike Walther
Saturday, 10 March 2018
John said: I recommend this course 5/5
Ryan Riley
Friday, 23 February 2018
Walter said:
Brett Fyfe
Tuesday, 12 December 2017
Bill said:

Basic but a good overall refresher course.

Dave Jackson
Sunday, 12 November 2017
Roger said:

Informative, good suggestions

Tim Keuski
Saturday, 22 July 2017
Jim said:

As always, very good information.

Sean Gavin
Thursday, 13 July 2017
Justin said: I recommend 5/5
Ken Swanson
Thursday, 15 June 2017
Craig said:

Very god refresher course.

Glenn Montague
Tuesday, 14 March 2017
John said:

The course was excellent as usual. I have been taking training courses from Mr. Kladder since 1995 when he was with the WRRTC. He has acquired more knowledge as have I over the years. He has always developed, produced, and presented material in a manner that is easy to comprehend and remember. 

The discussion of the material by attendees yields valuable information just as it always has. I recommend CERTI to everyone I know in the radon business and contractors who plan to build structures that are radon resistant.  

Richard Henry
Saturday, 11 March 2017
Jeff said:

Actually had some beneficial info for a mitigator with 17yrs experience.

Timothy Roberts
Thursday, 16 February 2017
Matt said:

Good refresher course.

Monday, 30 January 2017
Aaron said:

Very good refresher.

Monday, 30 January 2017
Aaron said:

Very good refresher.

Monday, 30 January 2017
Kyle said: I recommend this course
Adam N. Will
Wednesday, 14 December 2016
Mark said:

I felt that the course info. was beneficial, although it's 6 years dated now.  It would be nice to have another "topic" addressing the changes since this was filmed.

Mack Carr
Thursday, 01 December 2016
c. said:

Materials are easy to use and understand.

Michael Hensley
Tuesday, 25 October 2016
Rick said:

Answered and clarified many questions I had about the installation of radon systems in new homes.

Jason Willard
Wednesday, 12 October 2016
Jim said:

Very informative.

Jeffrey Green
Friday, 30 September 2016
robert said:

Course was informative.

Curtis Whitworth
Tuesday, 30 August 2016
Craig said:

My compliments to Doug for am easy to watch and informative course. The attendees also had good info to share.

Craig MacDonald
Friday, 26 August 2016
Peter said:

Enjoy the format

Peter Fazekas
Tuesday, 07 June 2016
Michael said:
Michael W. Jasper
Thursday, 18 February 2016
Wayne said:
Wayne Bailey
Friday, 05 February 2016
Gerardo said:

Excellent learning procedure, to young mitigators like my self.

Thank You.

Gerardo Leonel Giron
Saturday, 30 January 2016
Timothy said:

May be the best course I have taken. Very practical Information.

Timothy Paul Wessel
Thursday, 28 January 2016
Adam said: I recommend this course
Adam Beck
Sunday, 27 December 2015
Michael said: I recommend this course "5"
Michael F. Fiorelli
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