GroundRosterWilliam DahlstromLicensed
| Company | American Radon Systems |
| License number | RNM2018212 |
| License type | Radon Mitigation Professional |
| License status | Active, IEMA-OHS licensed |
| Based in | Tinley Park, Illinois |
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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 #RNM2018212 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.
Checked against IEMA-OHS radon license index, last checked 2026-11-02. See the issuing agency.
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