Concern: Wilde Lake High School: April 17th, 2023 (CXWLHS202300027E)

Room 234
Date of IEQ Report Form
Date of Report
Individual has a concern regarding a general health symptom.
IEQ Investigation Process

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: April 21, 2023

The temperature (72.1 degrees Fahrenheit), relative humidity (46.9%), carbon dioxide (476 parts per million (ppm)), and carbon monoxide (0.0 ppm) were acceptable. 

Housekeeping practices were acceptable. 

Various surfaces (with an emphasis on wooden surfaces) were assessed for visible mold growth. No visible mold growth was observed.

No chemical or musty odors were identified. 

Rust stains (likely from file cabinets) were observed near the entrance of the classroom. These appear to have been waxed over and do not represent a concern.

Various moisture readings were collected from drywall and casework (readings taken 1-3" from the floor). No elevated moisture was detected. 

It should be noted that a leak previously occurred in this classroom, impacting casework. The Office of the Environment was involved in the response and confirmed impacted materials had been dried. For more information see IEQ Concern #CXWLHS2022000217.

The supply vents were qualitatively assessed. Each was functioning.

The return vents were smoke tested. Each was functioning.

The Science Preparation Room was also assessed:

  • No concerns were identified with chemical storage practices.
  • The supply and return/exhaust vents were qualitatively assessed. Each was functioning. 
  • No odors were identified.
  • The pressure differential was positive compared to Classroom 234. The preparation room should be negative with respect to the classroom. This will minimize/eliminate incidental odors from preparation from migrating into the classroom space. 

The Heating Ventilation and Air Conditioning (HVAC) unit (Air Handling Unit-6) that serves the space was assessed:

  • The outside air dampers were open.
  • The filters were in place and condition was acceptable. No bypass was observed.
  • No concerns were identified with the coils or drain pan. 
Corrective Actions
April 25th, 2023

Building Maintenance (HVAC) will utilize a testing and balancing contractor to address the pressure differential between the classroom and the preparation room. 

Tracking Number