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 of Assessment: June 8,2021
An odor was noted in the mechanical room below the stairs where the sewer ejector pit is located.
The odor resembled sewer gas, not mold.
No mold growth was observed on the items stored within the space.
There is also a floor drain within the room that appears to be dry.
The room contains an exhaust fan that is controlled by a switch on the wall. The exhaust fan was off at the time of the assessment and was turned on after the condition was observed.
The odor may be related to the ejector pit (hence the exhaust fan) and/or due to the dry floor drain trap.
Custodial was instructed to charge the floor drain with water. This creates a barrier and does not allow the backflow of sewer gases. The floor drain should be charged regularly/as needed (monthly or quarterly) depending on site conditions.
Building Maintenance automated the exhaust fan so that the switch cannot accidently be turned off.