The Delaware Division of Public Health requires that persons measuring and testing for radon be certified by AARST-NRPP or NRSB. The Delaware Division of Public Health's Radon Program lists Certified Radon Testers on their website at http://www.dhss.delaware.gov/dhss/dph/hsp/hhinsideradon.html. To become certified, inspectors are required to have:
Become an InterNACHI® Certified Commercial Property Inspector. The online training and certification are free for members.
Visit Certified Commercial Property Inspectors Association (CCPIA) for additional commercial inspection training and resources.