Testing of Commercial/School/Multi-Family Buildings

Eff. October 9, 2009

  • According to 422.130(g)(1)(8), “The on-site presence of the Licensed Radon Measurement Professional providing supervision is required for all radon measurement activities at schools and commercial buildings”.
  • Think about it:
    • This means if a Technician is on a commercial site, he/she requires DIRECT supervision of a Prof licensee.
    • No longer allows for the general supervision of a Technician solely on a commercial/school/multi-family site.
  • Let’s review the commercial testing protocol in its entirety.  IL 32 Admin. Code 422.130(g)
  1. School and Commercial Building Measurements. Professional licensees shall submit standard operating procedures for the performance of school and commercial building measurements.
    1. Initial measurements shall be short-term measurements of at least 48 hours to 90 days, depending on the device used, and shall be made in all frequently occupied rooms in contact with the soil, whether the contact is slab-on-grade, a basement, berm, a room above a crawlspace or any combination.
      • Frequently occupied rooms include classrooms, offices, conference rooms, gymnasiums, auditoriums, cafeterias and break rooms.
      • Testing need not be conducted in infrequently used areas such as storage rooms, stairwells, restrooms, utility closets, elevator shafts or hallways.
      • A minimum of one detector shall be placed per every 2000 square feet of open floor area.
      • Schools and commercial buildings shall only be tested for radon during periods when the HVAC system is operating as it does normally when the buildings are occupied, even if the testing occurs when school is not in session or during long holidays.
    2. All frequently occupied rooms shall be tested simultaneously.
      • The licensee shall ensure that the teacher or frequent adult user of the room being tested is aware of the detector.
      • The licensee shall perform and document a surveillance of the building to determine the rooms needing testing prior to placement.
    3. Follow-up measurements shall be performed in every room with a short-term, initial measurement result of 4.0 pCi/L or greater. Refer to Appendix A.
    4. During both initial and follow-up measurements, the HVAC system shall be operated normally.
    5. The Radon Measurement Professional licensee shall recommend in writing to the school or commercial building management, owners or representatives that a decision to mitigate not be based on initial measurement results.
    6. School and commercial building measurements shall be performed in accordance with subsections (a) and (b) of this Section.
      1. School and commercial building measurements of less than 96 hours duration shall be performed under closed-building conditions as described in subsection (b)(1) of this Section.
      2. Duplicate measurements shall be performed and shall represent 10 percent of all the detectors deployed, or a maximum of 50 detectors, whichever is less, within the building.
      3. Blank measurements shall be performed and shall represent 5 percent of all the detectors deployed, or a maximum of 25 detectors, whichever is less, within the building.
      4. A Device Placement Log and Floor Plan shall be finalized for each school or commercial building in which radon or radon progeny measurements are made. All measurement devices, including duplicate measures and blanks, shall be noted on the Device Placement Log and Floor Plan by serial number.
    7. Requirements for Specific School and Commercial Building Designs
      • A) Slab-on-Grade Design. Measure all frequently-occupied rooms in contact with the ground.
      • B) Open-Plan or Pod Design. If sections of a pod have moveable walls that can physically separate them from other sections, measure each section separately. If moveable walls are absent or inoperable, measure the pod as one room placing detectors every 2000 square feet.
      • C) Crawlspace Design. Measure all rooms directly above an enclosed crawlspace.
      • D) Basement Design. In addition to measuring all frequently-occupied basement rooms, measure all frequently occupied rooms above the basement that have at least one wall with substantial contact with the ground.
    8. The on-site presence of the Licensed Radon Measurement Professional providing supervision is required for all radon measurement activities at schools and commercial buildings.