C-NRPP · CRMT-201836

Byung Sung Lee

RadonClean

Latest credential check on this page: September 14, 2026. Each record carries its own date. Canadian sources and verification.

Credential number: CRMT-201836
Credential body: Canadian National Radon Proficiency Program (C-NRPP)
Status: Current in the source on September 14, 2026. Certification, not a provincial licence.
Valid through: July 1, 2028
Service: mitigation
City: Markham
Province / country: Ontario, Canada
Phone: (416) 898-8127
Official source: C-NRPP public finder · Check CRMT-201836

Enter CRMT-201836 in the official certification check and match the name and expiry before hiring. Certification belongs to the person named here.

Fig. 1 — Markham, approximate. Pin marks the official Canadian Geographical Names Database city reference point, not a business address or service area.

Map source: Natural Resources Canada — Markham. Contains information licensed under the Open Government Licence – Canada.

Radon mitigation in Markham

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