"In the world of radon testing and mitigation, there is a very short list of professionals with the qualifications and certified professionalism of Mark Zeller."
- Jeff Searcy
The Searcy Team
Home Real Estate
Lincoln, NE 

"The work was completed in just a few hours.  Most importantly, the radon levels were drastically reduced in our basement rec room."
-Dennis Zabel
 Daykin, NE

"I am totally satisfied with Mark Zeller's work.  I told the editor in the newspaper...and the local TV station did an interview and it was on the news the next night. "
- Jim Lambert
Hastings, NE 

"Mark was very reliable, informative, and explained the process step-by-step and did a very nice clean job installing our radon mitigation "
- Andrew Kelly
Lincoln, NE