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: December 12, 2022
The space consists of two cubicle areas finished with drywall, carpet squares, and a drop-ceiling.
The Heating Ventilation and Air Conditioning (HVAC) system consists of an Air Handling Unit (AHU) within the penthouse that delivers air to an induction box (above the ceiling) which is then connected to a single supply air diffuser for the space.
The supply air diffuser was checked qualitatively and was delivering air to the space.
The temperature (70.5 degrees Fahrenheit (F)), carbon dioxide (491 parts per million), and carbon monoxide (0.0 ppm) measurements were acceptable.
Relative humidity (27.5%) could be considered slightly low, however HCPSS does not humidify indoor air as it can introduce other clinical health concerns (humidity fever) and it is not the industry standard for this region. This humidity level is consistent with other HCPSS facilities at this time of year.
No malodors were sensed within the space.
Various surfaces were assessed for mold growth. No mold growth was observed.
The carpet was probed with a moisture meter. No elevated moisture was detected.
The drywall was probed with a moisture meter. No elevated moisture was detected.
Horizontal surfaces such as the cubicle walls and metal shelving had moderate to heavy dust accumulations. Additionally a mirror with wooden trim (brought in by staff) also had heavy dust accumulations.
An artificial flower was observed on a desk.
Dust accumulations were also observed on the wall (adjoining the Superintendents Area). The deposits were in close proximity to the supply diffuser and became less dense as distance increased from the supply diffuser.
Areas above the drop-ceiling were assessed. No odors, mold growth, or signs of moisture intrusion were observed.
A "pile" of fiberglass was observed below the induction box that serves the space. No other fiberglass was observed in the area (sometimes fiberglass is placed on-top of ceiling tiles). It is likely the fiberglass observed is left over from an insulation project and should have been discarded.
The Office of the Environment cannot definitively identify the cause of a health condition, however two potential exposures include:
- It is possible that fiberglass/fiberglass dust was disturbed and entrained in the induction box and delivered to the space at the time the health concern was noticed. Fiberglass dust exposure symptoms can include irritation (reversible response) to the eyes, skin, nose, throat, and difficulty breathing.
- The general dust deposits on horizontal surfaces and/or on the wall may have been disturbed and become airborne causing irritation and/or an allergic response.
A work order was created to remove the fiberglass insulation that is located below the induction box. The ceiling tiles within a three-foot radius of the induction box will be replaced. "Cheese-cloth" will be placed on the supply diffuser to capture any residual fibers (to be removed after approximately a week). Work is to be conducted with the HVAC off and the space unoccupied.
After the fiberglass is removed from above the ceiling, Custodial Services is to dust horizontal surfaces and the effected wall (planned for December 16, 2022). Additionally, the Custodial Carpet Crew is to clean the carpets the evening of December 16, 2022.
Note that items brought in by staff are not Custodial Services responsibility. Items such as the wooden mirror are to be regularly dusted by the staff member who brought them in. Additionally, it is recommended that the artificial flower be removed as these items readily collect dust and are difficult to clean.