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: October 5, 2023
The portable is finished with drywall, floor tile, and a drop ceiling. Wood framing and fiberglass insulation are located above the drop ceiling.
No mold or musty odors were identified within the portable upon entering. The odor sensed was very typical of other HCPSS portables of similar construction and is associated with "newer" wood and fiberglass.
Various surfaces were assessed for mold that would have resulted from elevated summer humidity. No mold growth was identified. The humidity at the time of the assessment was 46.8%.
A data logger was placed in the space to measure temperature, humidity, and carbon dioxide. The temperature and humidity readings were acceptable. Carbon dioxide would be considered elevated.
Carbon dioxide is used as an indicator compound to determine is sufficient outdoor air is being delivered to a space. Outdoor air is important as it dilutes contaminants that are produced in the indoor environment, such as odors released from people and the natural off-gassing of building materials and furnishings. It is these other contaminants that lead to indoor air quality problems such as odors and "stuffiness." Carbon dioxide is not generally found at hazardous levels in the indoor environment.
Building Maintenance (HVAC) checked the outside air dampers for proper operation and reported the dampers were operational.
The thermostat fan setting was moved from the "auto" position to the "on" position. The HVAC unit's fan will continuously run, instead of cycling on and off. This will bring in additional outside air. This fan setting is acceptable when outdoor relative humidity is not elevated (i.e. fall/winter), however the HVAC department will need to change the fan setting next Spring/Summer to avoid elevated humidity in the portable. Building Maintenance checks the portables for proper Summer operation each year and would be responsible for changing the thermostat setting back to the "auto" position.
The Office of Building Maintenance (HVAC) has provided two portable air purifiers for each portable. Ensure the unit is running as it will assist in diluting odors (carbon filter) and removing nuisance particulate that naturally occurs through ventilation currents and occupant movement.