C-NRPP · CRT-201319

John Ainsley Marshall

JAM (2005) Enterprises

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

Credential number: CRT-201319
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: testing
City: London
Province / country: Ontario, Canada
Phone: (519) 709-0673
Official source: C-NRPP public finder · Check CRT-201319

Enter CRT-201319 in the official certification check and match the name and expiry before hiring. Certification belongs to the person named here.

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

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

Radon testing in London

Report a correction with this C-NRPP number.