Understanding Decontamination Chambers
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.
A Single Decontamination Chamber is a multi-purpose room used for donning and doffing PPE, as well as storage, double bagging, and other functions.
A Double Decontamination Chamber would include a Clean Room and a Pass Through.
A 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.
[Clean Room][Shower][Pass Thru][Contaminated Area]
[ -0.02 wc][-0.04 wc][-0.06 wc][-0.08 wc]