Concern: Bonnie Branch Middle School: August 17th, 2018 (CXBBMS2018000003)

Portable 36
Date of IEQ Report Form
Date of Report
October 4th, 2018
Mold growth was observed on chairs, desks, and other miscellaneous surfaces.
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)

The Office of the Environment identified relative humidity mold growth within Portable 36 on August 17, 2018.

The thermostat's fan mode was set in the “on” position as opposed to the “auto” position. The fan for the HVAC unit ran continuously, adding outside (humid) air into the Portable. The thermostat cover had been removed.

The HVAC unit was assessed and appeared dirty. The air filter was over one-year old.

Corrective Actions
August 21st, 2018

A board approved restoration contractor cleaned/disinfected surfaces within the portable. The contractor operated two air scrubbers equipped with High Efficiency Particulate Air (HEPA) filters during the cleaning. The air scrubbers were left in place and operating for approximately 1-day after the cleaning. Preventative maintenance (including a filter change) tasks and a general cleaning of the HVAC unit that services the portable were also completed by a Building Services (HVAC) contractor. The thermostat cover was replaced to deter tampering with the units operation.

Date Closed
Tracking Number