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 13, and 19, 2024
September 13, 2024
The Office of the Environment collected temperature (75.3 F), carbon dioxide (480 ppm), and relative humidity (59.0%) measurements from the area of concern. The Office of the Environment also collected temperature (74.5 F), carbon dioxide (479 ppm), and relative humidity (60.5%) from the air coming out of the supply diffuser. The measurements were acceptable.
No elevated moisture was identified in the carpet via a moisture probe.
Areas were screened with a thermal imaging camera. No thermal anomalies indicative of moisture intrusion were identifed.
No olfactory or visible signs of mold were observed within the space.
No evidence of active/historic leaks were observed above the drop ceiling.
No evidence of rust was observed on metal roof decking.
September 16, 2024
The Office of the Environment emailed school staff about when the smell was strongest to assist in identifying the source.
School staff indicated that the smell was no longer present and that staff would follow up if the odor returned.
September 19, 2024
The Office of the Environment collected additional temperature (76.3 F), carbon dioxide (495 ppm), and relative humidity (63.0%) measurements from the area of concern. The readings were acceptable.
No malodors were identifed.
Conclusion/Further Action
The humidity concerns reported may be associated with certain outdoor weather conditions (temperature, humidity, dew point) that primarily occur in the Summer. The condition may no longer be present due to regional changes in outdoor weather. The Office of the Environment will place a data logger within the area of concern next Summer to monitor the indoor humidity.