Radon data and time-lapse photos collected outside the Pinenut uranium mine, Arizona, 2015-16

Two Saphymo AlphaE radon (Rn) detectors, with a measurement range of 0.54 picoCuries per liter of air (pCi/L) to 270 nanoCuries per liter of air (nCi/L), were deployed from October 2015 thru May 2016 in publicly accessible areas adjacent to the Pinenut uranium mine located in northern Arizona. One monitor was installed in close proximity to the mine vent and a second monitor was installed in close proximity to the ore pile. In late December 2015, a third AlphaE Rn detector was deployed adjacent to the ore-pile monitor. Measurement frequency was 3 times per hour and a time-lapse camera was installed in close proximity to the ore pile to record relative size and activity of the ore pile during mining and early reclamation. Because of size limitations, the photos from the time-lapse camera are not included in the data release. Instead, information from each photograph was summarized in a separate data file included in the data release. A meteorological station was installed at the site and recorded wind speed, wind direction, and precipitation during the study period. Three Saphymo AlphaE Rn detectors were evaluated against a laboratory grade RAD7 spectral alpha counter in a controlled environment to verify field monitoring results. The RAD7 was factory calibrated to a NIST standard prior to testing. A NIST traceable Rn-222 activity sample of granite was used as the Rn source for all testing.

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