ProfessionalsBusiness profile
Kerrigan, John - Rhis, INC.
Wilmington, DelawareTesting and mitigation
2 Pennsylvania state licenses verified against the Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection list, last checked September 25, 2026.
Credentials
Licenses and certifications
2 credentials are on file for this business, each exactly as the issuer's list printed it.
These are Pennsylvania licenses, and the business address is in Delaware.
Radon411 has no Delaware record for this business. Before hiring it for a home in Delaware, check what Delaware asks for. What Delaware requires
Pennsylvania state licenses (2)
Issued by the Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection, not by NRPP or NRSB. Radon411 last checked the list on September 25, 2026. No expiry date is on the record.
| Holder | License | Number | Status on the list | Verified | Check with the issuer |
|---|---|---|---|---|---|
| No holder named · Mitigation | Mitigation | No. 1882 | DEP certified radon mitigation firm | Verified September 25, 2026 | Verify 1882 with the Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection (opens in a new tab) |
| No holder named · Testing | Testing | No. 1882 | DEP certified radon testing firm | Verified September 25, 2026 | Verify 1882 with the Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection (opens in a new tab) |
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