Entry № 100021

Anthony F. Marioni

Radon Specialist, Inc.

Last verified September 14, 2026. Methodology

Credential number
100021
Credential body
NRPP
Status
current Certified. Current in the source file.
Services
mitigation
City
New Castle
County
Not on the source file
State
Delaware
Phone
(302) 834-7100
Source
https://nrpp.info/listings/bl-21.html
Fig. 5Each pin is a current listing at the Census city or county centroid on the file, approximate. Pins that share a place are spread so you can click them. Not street addresses.

§ 5.1

Places on the source file

Claim or update this listing. A claim cannot add someone who is missing from the official file.