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: September 9, 2021
Mold growth (between one and two square feet) located on the drywall, directly behind the freezer.
There are two freezers against the wall. One freezer (where the mold growth was observed) was directly against the wall. The other freezer had approximately 6 inches or more of clearance between the freezer and the wall and no mold growth was observed.
The cause of the mold growth was the freezer being placed too close to the wall causing condensation from the freezer to be wicked by the drywall.
The Office of the Environment recommended that Building Maintenance cut out the impacted drywall and if possible consider a non-permeable barrier (such as plastic) along the wall to prevent the freezer(s) from coming in contact with drywall. Building Maintenance had a contractor onsite when the request was made (same day as the assessment) and the contractor was directed to remove the impacted drywall.
Administration is to inform staff to attempt to leave at least six inches of space between the wall and the freezers (even if plastic is installed). This gap will also assist with air flow.