Concern: Mount Hebron High School: September 23rd, 2019 (CXMHHS2019000116)

Room 204 & 202
Date of IEQ Report Form
Date of Report
November 5th, 2019
Odor concerns in both rooms.
IEQ Investigation Process

Identify deficiencies that may impact IEQ and/or sources of odor concerns. Typically includes the following depending on the nature of concern, but not limited to:

  • interview/questionnaire of concern individual(s)
  • inspection above drop ceiling (condition of roof deck, pipe insulation, return air plenum)
  • inspection of ventilation system (operation of variable air volume box and outdoor air dampers, check controls, measurements of carbon dioxide, temperature and relative humidity, sources near outdoor air intake, measure return and supply air volume, cleanliness of coils, liner and condensate pan)
  • inspection of exterior
  • inspection below drop ceiling (housekeeping, sink and floor drain traps, signs of past and present moisture concern via visual and/or moisture meter, mold growth, ensure connection of current and capping of abandoned sanitary vents, odorizers, excessive plants and fabric items, identify potential pathways, and measure volatile organic compounds, carbon monoxide, and lighting)

Date(s) of Assessment:  September 23 and October 1, 2019

A notable and/or unusual odor was not detected during the visits.  Visits consisted before and during the operation of the ventilation system.

The dedicated outdoor air handling unit serving these rooms was not operating on the initial visit.  Outdoor air is introduced to dilute odors from general occupancy and prevent the feel of stuffiness within the room. 

The air handling unit was corrected on the day of the initial visit and was working during the second visit.

The base cabinets in room 202 were dry as determined with the use of a moisture meter (wood setting).  However, one section in 204 was determined to be slightly wet.  An odor was not detected within the cabinet section.  The source of the moisture was addressed this past summer by addressing window flashing details.  The moisture is thought to be residual and has not dried out.

The area above the drop ceiling was acceptable.

Mold growth was not observed on inspected surfaces.

On the initial visit, Room 202's temperature was 73 degrees Fahrenheit (F) and relative humidity was 44%, while Room 204's temperature was 75 degrees F and 53% relative humidity.

Corrective Actions
September 23rd, 2019

Dedicated outdoor air unit (ERU 3) was repaired.

October 4th, 2019

Based on the Office of Environment's assessment of the base cabinets along the exterior wall of room 204 (slight wet and isolated), the removal of the cabinets and shelving to do further evaluation will be done during an extended school break (winter or spring) so not to disrupt use of the classroom.

Tracking Number