Stanfield School District Radon Test Results

January 24, 2019

Dear Stanfield School Parents, Teachers, Staff and all Building Occupants:

As part of the Oregon Health Authority’s Healthy and Safe Schools Plan, all Oregon schools are required to test for radon by January 1, 2021.

To ensure all Stanfield schools are safe and healthy, and to meet the new OHA mandates, the District placed test devices at Stanfield Secondary School and District Office on November 26, 2018.  The test devices were picked up on November 29, 2018, and immediately shipped for testing.  Results were received from the lab on December 4, 2018.

The District also placed the test devices at Stanfield Elementary School and the Maintenance Barn on January 14, 2019. The test devices were picked up on January 17, 2019, and immediately shipped for testing. Results were received from the lab on January 24, 2019.


  • Stanfield School District buildings are all safely under the 4.0 EPA action level.


  • Radon---A gaseous radioactive decay product of radium.
  • Blanks---Measurements made by analyzing unexposed (closed) detectors that accompanied exposed detectors to the field.  The School District use of blanks is to assess any change in analysis result caused by exposure other than in the environment to be measured.  Background levels may be due to leakage of radon into the detector, detector response to gamma radiation, or other causes.
  • Duplicates---Duplicate measurements provide a check on the precision of the measurement result and allow the user to make an estimate of the relative precision.  Large precision errors may be caused by detector manufacture or improper data transcription or handling by suppliers, laboratories, or technicians performing placements.  Precision error can be an important component of the overall error.  The precision of duplicate measurements is monitored and recorded as quality records.
  • Spikes---Measurements used to assess the accuracy of a lab analysis and/or how accurately detectors supplied by a laboratory (i.e. test kit manufacturer) measure radon.  “Spikes” are test kits that have been exposed to a known concentration of radon in a chamber approved by the National Radon Proficiency Program (NRPP) or National Radon Safety Board (NRSB).  Spikes must be performed by a separate laboratory, then sent for analysis with the bulk samples.  The process for completing this aspect of a radon measurement effort’s Quality Assurance/Quality Control plan is laid out in the Radon Test Placement Strategy and Protocol Checklist.

For more information about radon, please see the linked flyer.

For any questions regarding radon testing or results in our district, please contact Frank Longhorn, designated Radon Coordinator, at (541) 449-8766.


Frank Longhorn

Facilities Manager

Department of Operations

Release Date