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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 (English, Russian, Spanish). Health officials recommend families conduct home tests given the area’s geographic location and soil composition.

 

Test Results

Test Location Specific Location Test Date Average Radon Level Mitigated Status
Marrion Elementary Room 106 5-Jun-17 1.3-3.3 Yes Permanent Mitigation System Installed
Sifton Elementary Gym and Attached Offices 7-Apr-17 1.2 - 2.1 Yes Permanent Mitigation System Installed
Crestline Elementary Custodial Office (107C) 10-Mar-17 4.2 No Maintenance evaluating fan speed for existing radon mitigation system
Orchards Elementary  Music Office and Room 15-May-17 0 Yes Temporary Mitigation System in operation, permanent system to be installed by end of September
Riverview Elementary    10-Apr-17 No actionable levels    
Fishers Landing Elementary   10-Apr-17 No actionable levels    
Columbia Valley Elementary   10-Apr-17 No actionable levels    
HeLa High School   10-Apr-17 No actionable levels    
Wy'east Middle School   10-Apr-17 No actionable levels    
Mill Plain Elementary School Front Office 5/19/2017 1.2 Yes Permanent Mitigation System to be installed 9/13/2017
  100 15-May-17 1 Yes Permanent Mitigation System to be installed 9/13/2017
  103 15-May-17 1.3 Yes Permanent Mitigation System to be installed 9/13/2017
  109 May 15, May 19, May 22 3.9, 3.1, 1.6 No Additional testing to begin in October when heating season resumes
  Staff Lounge 10-May-17 0.5 Yes Permanent Mitigation System to be installed 9/13/2017
  201 12-Jun-17 1.5 No Additional testing to begin in October when heating season resumes
  204 19-Jun-17 3.5 No Additional testing to begin in October when heating season resumes
  301 10-May-17 0.4 Yes Permanent Mitigation System to be installed 9/13/2017
  304 10-May-17 0.5 Yes Permanent Mitigation System to be installed 9/13/2017
  Library 15-May-17 1.9 Yes Permanent Mitigation System to be installed 9/13/2017
Mountain View High School Small Gym 5-Sep-17 2.4 No Temporary Mitigation System installed 8/29/2017, evaluation in progress
  Auditorium 12-May-17 1.3 Yes HVAC system was adjusted
  Staff Lounge 12-May-17 2.2 Yes HVAC system was adjusted
  Student Center 12-May-17 1.6 Yes HVAC system was adjusted
  Wrestling Room 12-May-17 1.3 Yes HVAC system was adjusted
Hearthwood Elementary Library Office 5-Sep-17 2.2 No Temporary Mitigation System installed 8/29/2017, evaluation in progress
Pacific Middle School Woodshop/Tech Ed 7-Aug-17 0.2 to 0.5 No Concrete slab crack sealing complete 7/2017, additional retesting in October of 2017
Fircrest Elementary Library Office 12-Apr-17 0.6 Yes HVAC system was adjusted
Ellsworth Elementary Gym and Classroom 101 12-Apr-17 0.7 to 2.7 Yes HVAC system was adjusted
Burton Elementary   21-Apr-17 No actionable levels    
Illahee Elementary   21-Apr-17 No actionable levels    
Shahala Middle School   21-Apr-17 No actionable levels    
Cascade Middle School   21-Apr-17 No actionable levels    
Endeavour Elementary School   21-Apr-17 No actionable levels    
Harmony Elementary School   21-Apr-17 No actionable levels    
Legacy High School   21-Apr-17 No actionable levels    
Evergreen High School   21-Apr-17 No actionable levels    
Burnt Bridge Creek Elementary Music Room 5-Sep-17 2 No Temporary Mitigation System installed 8/29/2017, evaluation in progress
  Forum 5-Sep-17 2.2 No Temporary Mitigation System installed 8/29/2017, evaluation in progress
  Media Center 5-Sep-17 0.95 No Temporary Mitigation System installed 8/29/2017, evaluation in progress
  Room 205 5-Sep-17 1.8 No Temporary Mitigation System installed 8/29/2017, evaluation in progress
Image Elementary School   1-May-17 No actionable levels    
Pioneer Elementary School   1-May-17 No actionable levels    
Frontier Middle School   1-May-17 No actionable levels    
49th Street Academy   1-May-17 No actionable levels    
Cascadia Technical Academy   1-May-17 No actionable levels    
Covington Middle School Fitness 11-May-17 4.8 No Ventilation adjusted, retesting to commence in October of 2017
York Elementary School 144 11-May-17 7.2 No Ventilation adjusted, retesting to commence in October of 2017
Heritage High School Band Room 11-May-17 6 No Temporary Mitigation System installed 9/11/2017, evaluation in progress
  Auditorium 11-May-17 5.5-13.7 No Temporary Mitigation System installed 9/11/2017, evaluation in progress
Union High School   11-May-17 No actionable levels    
Sunset Elementary School   11-May-17 No actionable levels    
Silver Star Elementary School   11-May-17 No actionable levels    

 

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