Concern: Lisbon Elementary School: June 20th, 2019 (CXXLES20190000E8)

Room 116 and Room 122
Date of IEQ Report Form
Date of Report
July 18th, 2019
Posters were removed from the block walls and mold was observed on the wall.
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(s) of Assessment: June 25, 2019

No mold growth was observed during the assessment as it had already been cleaned/disinfected.

The pictures indicated each area of impact was approximately one square foot.

Areas above the drop-ceiling were acceptable.

The windows were inspected by the Office of the Environment and Building Services. No concerns were identified with the windows.

The thermal screening of the walls was conducted. No thermal anomalies indicative of moisture intrusion were detected.

The whiteboards were removed from the walls to inspect the backsides for mold growth.

The mold growth may have occurred due to thermal differentials between the wall and the room and lack of air movement behind the posters.

It should be noted that humidity may have also played a role in the formation of mold behind the posters. The Office of the Environment and Building Services (HVAC) are currently working to place humidity data loggers at Lisbon Elementary to monitor summer humidity conditions.

Corrective Actions
June 20th, 2019

Custodial Services was instructed to clean/disinfect the mold growth off of the block walls and posters.

July 22nd, 2019

Administration can consider directing staff not to place posters on the exterior wall on that side of the building.

Tracking Number