GroundRosterDuane JohnsonLicensed
| License number | RME 544 |
| License type | Radon Mitigation Professional |
| License status | Active, Colorado DORA licensed |
| License expires | May 31, 2027 |
| Based in | Crested Butte, Gunnison County, Colorado 81224 |
"Based in" is the city and county of the address on the business's license record. That can be a mailing address; it doesn't tell you where the business works.
How to verify this license
We publish the license details exactly as they appear in the official licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #RME 544 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.
Checked against Colorado DORA radon license file, last checked 2026-11-02. See the issuing agency.
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