RadNet Air Filter Inquiries
A RadNet air filter inquiry is not a response to a known radiological emergency.
A RadNet air filter inquiry is initiated when there is potential for a release of radioactive materials to the air that could result in the presence of airborne radionuclides at low concentrations. A RadNet air filter inquiry may also be initiated if low concentrations of radionuclides have been detected in the U.S., or by an international agency.
| Date | Description of Event | RadNet Modifications | Findings | |
|---|---|---|---|---|
| 6/14/2020 – 6/26/2020 | In consideration of reported detections of man-made radionuclides in the atmosphere in northern Europe in mid-June 2020, the EPA temporarily modified procedures for RadNet air monitor filter screening and analysis. |
The gross beta air concentration screening level for air filter analysis is temporarily reduced to 0.01 pCi/m 3 . Air filters with beta air concentration values above the temporary screening level will receive gamma spectrometry analysis. |
View all air filter monitoring results. |
No man-made radionuclides were detected as part of this inquiry. |
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Gamma spectrometry analysis is being performed on air filters collected during the indicated date range from seven selected air monitoring locations, regardless of gross beta air concentration values. |
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| 11/7/2018 – 11/16/2018 | In consideration of California’s Woolsey Fire and its proximity to the closed Santa Susana Field Laboratory, the EPA temporarily modified procedures for RadNet air monitor filter screening and analysis. |
The gross beta air concentration screening level for air filter analysis is temporarily reduced to 0.015 pCi/m3. Air filters with beta air concentration values above the temporary screening level will receive gamma spectrometry analysis. |
View all air filter monitoring results. |
No man-made radionuclides were detected as part of this inquiry. |
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Gamma spectrometry analysis is being performed on air filters collected during the indicated date range from five selected air monitoring locations, regardless of gross beta air concentration values. |
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| 4/11/2018 - 5/1/2018 | In consideration of a breached drum of radioactive material at the Idaho National Laboratory site, the EPA temporarily modified procedures for RadNet air monitor filter screening and analysis. |
The gross beta air concentration screening level for air filter analysis is temporarily reduced to 0.015 pCi/m3. Air filters with beta air concentration values above the temporary screening level will receive gamma spectrometry analysis. |
View all air filter monitoring results. | No man-made radionuclides were detected as part of this inquiry. |
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Gamma spectrometry analysis is performed on air filters from selected air monitoring locations, regardless of beta air concentration values. |
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Transuranic analyses for alpha-emitting radionuclides will be considered if releases to the atmosphere outside of the containment are indicated. |
N/A | |||
| 9/24/2017 - 10/31/2017 | In response to detections of very low amounts of ruthenium-103 and ruthenium-106 by various European air monitoring agencies, EPA temporarily modified procedures for RadNet air monitor filter screening and analysis. |
The gross beta air concentration screening level for air filter analysis was temporarily reduced to 0.02 pCi/m3. Air filters with beta air concentration values above the temporary screening level received gamma spectrometry analysis. |
View all air filter monitoring results. | The concentrations reported for ruthenium-103 and ruthenium-106 are all below the detection limit for those radionuclides. |
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Gamma spectrometry analysis was performed on air filters from selected air monitoring locations, regardless of beta air concentration values. |
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