Square One Radon LLC is a radon mitigation provider based in Grand Junction, CO, credentialed by CO DORA; NRPP. Services listed on its website: Commercial / multifamily, New construction (RRNC), Radon testing, Real estate / fast turnaround.
Colorado
United States
CO DORA RMT license 7 (Rob Anthony Hartop; Radon Mitigation Professional; expires 05/31/2027) | NRPP 111165-RMS (Rob A Hartop; Radon Mitigation Specialist; expires June 30, 2028)
Commercial / multifamily; New construction (RRNC); Radon testing; Real estate / fast turnaround
https://apps2.colorado.gov/dora/licensing/lookup/generateroster.aspx (roster RMT, downloaded 2026-11-02) | https://nrpp.info/listings/bl-13774.html
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