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 19, 2023
The temperature (65.7 degrees Fahrenheit (F)), relative humidity (50.9%), and carbon monoxide (0.0 parts per million (ppm)) readings were acceptable for an early morning visit (prior to occupancy).
The carbon dioxide was considered elevated for an unoccupied classroom (1,450 ppm).
Carbon dioxide readings were collected in other portables at the school for comparison. These readings were much lower (around 400-500 ppm) and would be expected (some portables were occupied or had been occupied by staff).
A "wood" odor very consistent with other HCPSS portables was encountered.
A moldy/musty/damp odor was not sensed.
No visible mold was observed on surfaces.
No elevated moisture was detected in the walk-off mat.
No elevated moisture was detected in the drywall, specifically near the doors/windows.
Areas above the drop ceiling were assessed. No obvious indications of leaks/moisture intrusion were identified.
Due to the elevated carbon dioxide, the Office of the Environment believed that the outside air dampers may not be functioning properly.
Building Maintenance (Heating Ventilation and Air Conditioning (HVAC)) assessed the unit and found that the outdoor air damper actuator was in need of repair.
The odor sensed was likely related to the portables construction (plywood). The odor was likely exacerbated due to the lack of outside air, which would provide dilution.
A work order was created for Building Maintenance (HVAC) to assess the portables HVAC unit. The actuator for the outside dampers needs to be replaced. The part is currently on order. Once received Building Maintenance is to complete the repair.