As part of ongoing safety measures, Evergreen Public Schools has been conducting voluntary radon testing in buildings. The testing is not required by state or federal laws. Even though Clark County has significantly lower naturally occurring radon levels than other areas of the state, it does have above average levels, so it is prudent to conduct periodic tests.
Starting in late January 2017, district staff began taking initial short term measurements for radon at multiple sites. Several test results indicated levels of radon slightly higher than the EPA’s action level of 4 pCi/L, so the district hired an outside professional radon contractor to provide follow-up testing and diagnostics to determine the appropriate radon reduction technique, which may include bringing in additional outside air or removing barriers to improve ventilation. When a room’s initial result is only slightly elevated above 4 pCi/L (e.g., between 4 and 10 pCi/L) the EPA recommends long-term follow-up measurements, preferably taken over the entire nine month school year to best represent the average radon concentration for the school year in that room.
The professional radon contractor is now continuing the process of on-going testing throughout the district schools. Results of the tests conducted by the professional radon contractor will be posted below as they are completed, as well as any mitigation status.
An informational sheet about radon, as well as the prevalence throughout Clark County, is provided here (English, Russian, Spanish). Health officials recommend families conduct home tests given the area’s geographic location and soil composition.