NRSB RMS case studies

NRSB RMS · Put your knowledge to work in context.

The Radon Measurement Specialist (RMS) credential is issued by the National Radon Safety Board (NRSB), an independent certifying body that has been certifying radon professionals for over 20 years. RMS certification is formal recognition of professional excellence based on qualifications, high ethical standards, and continuing education in radon services. The NRSB RMS case studies are 5 cases and about 2,589 words.

Real-Estate Test Invalidated by Open Window and Poor Placement

On a tight real-estate deadline, you place a continuous radon monitor (CRM) in the finished basement family room of a 1970s ranch. The CRM sits on a bookshelf 5 ft above the floor, 8 in from the exterior wall and 2 ft from a sliding window.

566 words, about 3 min 2

QA Review: Duplicate, Blank, and Spike Failures in One Charcoal Batch

At annual QA review for a small measurement firm, you examine 120 charcoal short-term tests, 12 duplicates, 6 field blanks, and 3 spikes. One duplicate pair from a basement reads 4.6 and 7.8 pCi/L.

492 words, about 2 min 3

Duplex With Shared Foundation: One Unit Tested, Two Units Occupied

You are hired to test the left unit of a side-by-side duplex built on a shared poured slab with a common basement divided by a partial cinderblock wall. Gaps at the top of the wall and a single shared sump connect the two sides.

548 words, about 3 min 4

Post-Mitigation Test Interrupted by a Six-Hour Power Outage

On March 3 an active soil depressurization (ASD) system is installed in a split-level home with a basement and a crawl space. On March 5 you start a 48-h post-mitigation CRM test in the basement, 20 in above the floor and 3 ft from the exterior wall.

484 words, about 2 min 5

Private Well With High Water Radon and Elevated Basement Air

An owner of a rural home with a private drilled well calls after a 48-h basement CRM test reads 14.8 pCi/L; a first-floor 48-h test reads 3.1 pCi/L. The family showers, washes laundry, and uses the well for all domestic water.

499 words, about 2 min