Usually this stress is 0.25 inches of water column, but might be lifted or reduced as the method needs. Isolators must be periodically leak tested to be certain their integrity and stop escape with the decontamination agent. Leak testing can be done by a variety of approaches which includes https://tailinscitech.wixsite.com/tailinscitech/post/applications-and-benefits-of-tailin-containment-isolator-for-handling-high-potency-materials