Concern: Mount Hebron High School: August 17th, 2023 (CXMHHS202300029C)

Portable 145
Date of IEQ Report Form
Date of Report
Suspect mold growth reported by Building Maintenance (HVAC).
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: August 17, 2023

Black staining/dirt and debris was observed around the supply diffuser vents (ceiling). 

The thermostat was checked and the settings were acceptable (temperature set point in the mid-70's and fan running intermittently).

Various surfaces were assessed for mold growth. Mold growth was observed on a wooden cabinet and two metal filing cabinets. The mold growth was limited and sporadic and appeared to be in the "early" stages of growth (limited impact). 

Given the limited amount, the Office of the Environment cleaned/disinfected upon discovery. 

A definitive cause was not identified. It is possible that the thermostat was set incorrectly during the Summer and had been changed prior to the Office of the Environment visiting the site. 

It should also be noted, that the Office of the Environment assessed the remaining portables at the site. No additional mold growth was identified. 

Corrective Actions
August 17th, 2023

A board-approved restoration contractor performed a precautionary cleaning of materials within the portable (desks, chairs, cabinets, etc.). Additionally, areas around the supply diffusers were cleaned and encapsulated. 

August 23rd, 2023

Proper operation of the HVAC unit was assessed by Building Maintenance and no deficiencies were identified. 

Date Closed
Tracking Number