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 11, 2022
The space consists of block wall, floor tile, an area rug, and a drop ceiling. The room has six supply diffusers and two filtered return vents.
The temperature (70.1 degrees Fahrenheit (F)), relative humidity (42.5%), carbon dioxide (407 parts per million (ppm)), and carbon monoxide (0.0 ppm) were acceptable.
The room has been historically impacted by mold growth on surfaces in the summer due to the spaces Heating Ventilation and Air Conditioning (HVAC) system (constant volume units are prone to providing elevated humidity under certain weather conditions (Summer)).
The room was re-assessed for mold growth on surfaces due to high humidity in the Summer. No mold growth was observed.
No moldy/musty odors were sensed.
A ceiling tile with mold on it (indicative of a leak) was identified below a Variable Air Volume (VAV) box in the ceiling. The ceiling tile was removed and replaced with new upon discovery.
The ductwork up and downstream of the VAV box was affixed with access panels. The inside of the ductwork was viewed via the access panels (up/down stream of the VAV). No mold growth, odors, or concerns were identified within the duct work.
The filters in the return grilles were assessed and were in good condition (recently replaced in August 2022).
Dead bugs were observed in the light fixture within the bathroom.
The Roof Top Unit (RTU) that serves the space (RTU-6) was assessed:
- The outside air dampers were open.
- The filters, coils, and drain were acceptable.
Custodial Services was asked to submit a work order to Building Maintenance regarding the leak and clean the dead bugs from the light.
Building Maintenance (HVAC) indicated that RTU-6 and 7 (serves Room 131, similar construction) will be modified with a dehumidification sequence of operation to reduce the potential for elevated indoor relative humidity and subsequent mold growth (primarily a concern June-September).