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Fire & Water - Cleanup & Restoration

Understanding Decontamination Chambers

2/14/2018 (Permalink)

There are 2 types of decontamination chambers we typically add on to a contained and contaminated space:

  • Clean Room - Where PPE is stored and workers suit-up (donning PPE)
  • Pass Through - Where workers remove their PPE (doffing PPE)

We will typically use a combination of 1-3 decontamination chambers, depending upon the extend, degree, and type of contamination, also taking into consideration the available space, type of building, and the occupants. For example 3 chambers might be advisable when the occupants of the structure pose a higher risk for health effects (e.g. if somebody has asthma), while only 1 chamber might be called for when decontaminating part of an empty warehouse.

Single Decontamination Chamber is a multi-purpose room used for donning and doffing PPE, as well as storage, double bagging, and other functions.

Double Decontamination Chamber would include a Clean Room and a Pass Through.

Triple Decontamination Chamber would include a Clean Room, a Shower, and a Pass through.

Each decontamination chamber would also be under slightly negative air pressure, compared to the adjacent chamber. We typically measure negative air pressure using a manometer, measuring relative pressure in inches of water, using the units of wc (water column). In order to maintain negative pressure, we would like each chamber to have 0.02 - 0.04 wc less than the previous chamber.

EG:

[Clean Room][Shower][Pass Thru][Contaminated Area]

[ -0.02 wc][-0.04 wc][-0.06 wc][-0.08 wc]

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