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Air Quality

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. Health officials recommend families conduct home tests given the area’s geographic location and soil composition.

 

Test Results

Test Locations  Test Date Average Radon Level (pCi/L) Action Taken 
Marrion Elementary - Room 106  June 5, 2017 1.3 - 3.3 Mitigated
Sifton Elementary
Gymnasium and attached offices 
March 9, 2017
March 27, 2017 
4.0 - 11.1
1.5 - 3.4

Mitigated
Crestline Elementary - Room 107C  March 10, 2017 4.2 Mitigated
Orchards Elementary - Music Room   March 10, 2017  0 Mitigated
Riverview Elementary April 10, 2017   No actionable levels detected   
Fishers Landing Elementary April 10, 2017  No actionable levels detected  
Columbia Valley Elementary April 10, 2017   No actionable levels detected  
HeLa High School April 10, 2017  No actionable levels detected  
Wy'east Middle School April 10, 2017   No actionable levels detected  
Mill Plain Elementary School  June 5, 2017 1.5 - 3.9 Mitigation in progress
Mountain View High School - Small Gym April 28, 2017 1.3 - 8.8 Mitigation in progress
Hearthwood Elementary School April 12, 2017 4.1 Mitigation in progress
Fircrest Elementary School April 12, 2017 .6 Mitigated
Ellsworth Elementary School April 12, 2017 .7 - 2.7 Mitigated
Burton Elementary School  April 21, 2017 No actionable levels detected  
Illahee Elementary School April 21, 2017  No actionable levels detected  
Shahala Middle School  April 21, 2017  No actionable levels detected  
Cascade Middle School April 21, 2017  No actionable levels detected  
Endeavour Elementary School April 21, 2017  No actionable levels detected  
Harmony Elementary School April 21, 2017  No actionable levels detected  
Pacific Middle School April 21, 2017  4.0 - Technology Education Room  Mitigation in progress 
Legacy High School April 21, 2017  No actionable levels detected  
Evergreen High School April 21, 2017  No actionable levels detected  
Burnt Bridge Creek Elementary School  May 1, 2017 4.1 - 13.6 Mitigation in progress
Image Elementary School  May 1, 2017 No actionable levels detected  
HeLa High School May 1, 2017 No actionable levels detected  
Pioneer Elementary School May 1, 2017 No actionable levels detected  
Frontier Middle School May 1, 2017 No actionable levels detected  
49th Street Academy May 1, 2017 No actionable levels detected  
Cascadia Technical Academy May 1, 2017 No actionable levels detected  
Covington Middle School - Fitness Room May 11, 2017 4.8 Mitigation in progress
York Elementary School - Room 144 May 11, 2017 7.2 Mitigation in progress
Heritage High School - Room 471 May 11, 2017 5.5 - 13.7 Mitigation in progress
Union High School May 11, 2017 No actionable levels detected  
Sunset Elementary School May 11, 2017 No actionable levels detected  
Silver Star Elementary School May 11, 2017 No actionable levels detected  
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