Concern: Centennial Lane Elementary School: September 4th, 2018 (CXCLES201800002A)

Location
147, 150, and 156
Date of IEQ Report Form
Date of Report
September 17th, 2018
Concern
There have been 3-4 flooding occasions that have impacted classroom 156.

Note: The Office of the Environment has recently transitioned to a new Online IEQ platform (as of August 2018). The new platform does not allow the back-dating of IEQ concerns. This concern is inappropriately dated September 4, 2018. The concern should be dated May 29, 2018.
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)
Findings

The Office of the Environment responded to a flood event on May 26, 2018. The flood event impacted room 147 (office), 150 (storage closet), and 156 (classroom).

Carpet fans were placed to dry impacted carpet.

Cove base was removed from impacted walls to facilitate drying. 

Holes were drilled into impacted drywall to facilitate drying.

It was reported that the leak primarily occurs during "large" rain events.

While investigating the cause of the leak, mold growth was discovered behind drywall in rooms 147 and 150 (the rooms are adjoining). There is a pipe chase located in the vicinity of the mold growth. The pipe is associated with a roof drain that outlets below the building's slab.

Building Services assessed the pipe for leaks and none were observed.

Building Services used a remote camera to assess additional piping in the vicinity of Room 156. No concerns were identified.

The source of the leak may be occurring beneath the building's slab. Destructive testing (removal of the floor) is required to further assess.

Corrective Actions
May 21st, 2018

A board-approved restoration contractor removed the mold impacted drywall in rooms 147 and 150, under a negative-pressure containment. 

June 15th, 2019

Building Services plans to perform destructive sampling of the concrete slab in an attempt identify the source of the leak during the 2019 summer-break. The date listed is an estimate.

Closed
No
Tracking Number
CXCLES201800002A