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Guy SpencerLicensed

Licensed radon professional based in Carol Stream, DuPage County, IL

Company	VSI Radon Reduction Corp.
License number	RNM2010210
License type	Radon Mitigation Professional
License status	Active, IEMA-OHS licensed
Based in	Carol Stream, DuPage County, 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 #RNM2010210 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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