NRSB RMT case studies
NRSB RMT · Put your knowledge to work in context.
The NRSB Radon Measurement Technician (RMT) certification is a credential issued by the National Radon Safety Board to people who have been trained and certified in the fundamentals of radon testing. It suits technicians who deploy and retrieve measurement devices in homes and buildings under a measurement protocol, and who want third-party recognition of that training alongside any state radon program requirements. The NRSB RMT case studies are 5 cases and about 3,183 words.
1The Seller Aired It Out: A Short-Term Real Estate Test Mid-Transaction
A 48-hour continuous radon monitor (CRM) is running in the finished basement of a split-level home during a real estate transaction. Placement follows your SOP: lowest livable level, 20 inches above the floor, 3 feet from exterior walls, 4 feet from the sump pit, out of the HVAC supply stream.
678 words, about 3 min2QC Failures in a 24-Canister Apartment Batch
Your company's QA plan requires one field duplicate for every 10 field devices, one field blank per batch, and one spiked device per 20 field devices. Acceptance criteria: duplicate relative percent difference (RPD) of 36% or less, or an absolute difference of 0.5 pCi/L or less; field blank at or below 2 times the lab's MDC of 0.3 pCi/L; spike recovery 85–115%.
681 words, about 3 min3Post-Mitigation Verification With a Seven-Hour Fan Outage
A sub-slab depressurization system is installed in a home with a pre-mitigation 48-hour average of 8.9 pCi/L in the basement family room. The contractor starts the fan Monday at 4:00 p.m.
620 words, about 3 min4School Testing on a Summer Budget: 24 Detectors for 40 Rooms
A K-8 school requests radon testing before a bond vote. The building has 40 ground-contact rooms: six classrooms and a gym on a below-grade basement level, 20 classrooms on a slab-on-grade first floor, and 14 rooms over a crawl space.
606 words, about 3 min5A Long-Term Detector That Moved to the Garage
A homeowner with a prior 48-hour result of 5.8 pCi/L in the basement orders a 91-day alpha track detector. You place it in the basement bedroom where she sleeps, on a shelf 5 feet above the floor, away from the exterior wall, and log a start date of March 3.
598 words, about 3 min