Indoor Environmental Quality - Credit 5

Indoor Chemical & Pollutant Source Control (1 points)

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Design to minimize pollutant crosscontamination of regularly occupied areas

Employ permanent entryway systems of at least 10 foot long (grills, grates, etc.) to capture dirt, particulates, etc. from entering the building at all high volume entryways.
Where chemical use occurs (including housekeeping areas and copying/printing rooms) sufficiently exhaust each space to create negative pressure when the doors are closed. Provide segregated areas with self closing doors and deck to deck partitions with separate outside exhaust at a rate of at least 0.50 cubic feet per minute per square foot, no air re-circulation and maintaining a negative pressure of at least 5 PA (0.02” of water gauge) on average and 1 Pa (0.004” of water gauge) at a minimum when the doors to the rooms remain closed.
In mechanically ventilated buildings, install new air filtration media in regularly occupied areas prior to occupancy. These filters must provide a minimum efficiency reporting value (MERV) of 13 or higher. Filtration should be applied to process both return and outside air that is delivered as supply air.
Provide containment for appropriate disposal of liquid waste in spaces where water and chemical concentrate mixing occurs.

Incidental concrete application: The likely involvement of concrete in achieving this Credit is the need to cast in the necessary recesses for installing walk-off grilles at important entrances.