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: January 8, 11, and 22
The odor was described as "sweet" and "yeast" however, during the Office of the Environments visits no such odors were present. Only a faint odor typical of a gymnasium.
A faint odor was present with the schools mechanical room. It was reported that the Building Maintenance (HVAC) had recently introduced propylene glycol into the cooling system (a common chemical used as anti-freeze in mechanical equipment). The chemical would have been introduced in the mechanical room, which adjoins the gymnasium.
A similar concern occurred last year. Last year's concern coincided with the introduction of propylene glycol into the cooling system.
The Office of the Environment has requested to be present the next time propylene glycol is being introduced to examine work and storage practices that may be causing odor concerns within the school.