NRSB RMS

It is a multiple choice exam delivered online and available 24 x 7. It consists of 100 multiple choice questions, the examinee has 2 hours to complete it, the passing grade is 70%, and it costs $120. Schedule through the NRSB digital exam information and scheduling pages.

Yes. Initial RMS certification requires that you take and pass an NRSB-approved 16-hour Initial Measurement Course. The exam itself is a separate step, and your application is submitted with a copy of the NRSB Exam score report and the certificate of completion from the initial course.

With 100 questions in 2 hours you average about 72 seconds per item, so pace matters as much as depth. Start with the free NRSB Certification Exams Study Guide, then work through measurement fundamentals and the standards your state recognizes. Your QA plan must list the standards you follow, so know them well.

Running out of time on later questions, and weak recall of device and quality-assurance details. If you use CRMs or electret ion devices, the certification process also demands calibration reports for every device, a proficiency test, and copies of customer reports - candidates often underestimate these documentation requirements.

The NRSB source page does not publish a retake policy, so confirm directly with the NRSB before assuming you can reschedule immediately or at a reduced fee. Plan to pass on the first attempt: the exam fee is $120 and the application cannot proceed without a passing score report.

The certification fee is $125 for 1 year or $200 for two years, paid when you submit the Initial Measurement Specialist Application. That is separate from the $120 exam fee and from any charge for the 16-hour initial course.

Renewal requires taking and passing NRSB-approved continuing education courses, completing 8 CE credits per renewal year, submitting current calibration reports for every CRM and electret ion device used, and for electret ion devices submitting either a proficiency test for each type or blind spiking results, plus customer reports.

The NRSB recognizes all ANSI/AARST radon standards in addition to the previously recognized EPA and ASTM standards. A certificate holder must follow the standards recognized by the state in which they conduct business, and their QA plan must list the standards being followed. Some states run their own certification or registration programs.

No. Mitigation is covered by the separate Radon Mitigation Specialist (RRS) credential. RMS holders who also read electret ion devices and generate customer reports should note that companies using electret ion devices must also become an Accredited Radon Laboratory.