Concern: Marriotts Ridge High School: October 9th, 2020 (CXMRHS202000018D)

Auditorium Hallway
Date of IEQ Report Form
Date of Report
Building Services (HVAC) reported possible mold growth on the back-side of a drywall ceiling while repairing a leaking gasket on a hot water line.
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(s): October 8, 2020

Mold growth (approximately 20 square feet) was confirmed by the Office of Environment.

The mold growth was located in the ceiling cavity on the backside of the drywall ceiling.

Elevated moisture readings were also detected in the vicinity of the growth.

The cause of the mold growth was the leaking gasket.

Building Services (HVAC) reported that the leak had been corrected on October 9, 2020.

Corrective Actions
October 13th, 2020

A board-approved restoration contractor removed the impacted drywall (mold and/or wet) within a negative pressure containment. The contractor arrived to re-install drywall on October 14 and noted the origin of the original leak was still active (slight dripping). Building Services (HVAC) returned to perform additional maintenance, and permanently correct the leaking flange. Drywall was installed after the leak had been permanently corrected.

Tracking Number