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Ronald MelchiorLicensed

Licensed radon professional based in Walnut Creek, Contra Costa County, CA

License numberRME 588
License typeRadon Mitigation Professional
License statusActive, Colorado DORA licensed
License expiresMay 31, 2027
Based inWalnut Creek, Contra Costa County, California 94597

"Based in" is the city and county of the address on the business's license record. That can be a mailing address; it doesn't tell you where the business works.

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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 #RME 588 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Checked against Colorado DORA radon license file, last checked 2026-11-02. See the issuing agency.

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