Concern: Hollifield Station Elementary School: August 27th, 2021 (CXHSES20210001E7)

Portable 71
Date of IEQ Report Form
Date of Report
Relative humidity mold was identified in Portable 71.
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 26, 2021

Relative humidity mold was identified on various surfaces to include select shelving and instrument stands.

The cause of the mold growth was extended elevated relative humidity due to the portable's thermostat operation (fan mode: on). Building Maintenance (HVAC) has set the HVAC units in the portables (system-wide) to this setting as a response to COVID-19. This setting will cause elevated indoor humidity and possible subsequent mold growth in the Spring/Summer due to the Mid-Atlantic's climate (humid).

Corrective Actions
August 27th, 2021

A board-approved restoration contractor cleaned/disinfected the space. An air scrubber (HEPA filtration) was operated within the space during the cleaning. A dehumidification unit was also installed and will be left in place until approximately October. 

It should also be noted that the Office of the Environment recommended portable dehumidifiers for portable classrooms system-wide. A system-wide roll-out of portable dehumidifiers began the weekend of August 28.

Tracking Number