Related Experiment Video
Updated: Aug 12, 2026

Safety Precautions and Operating Procedures in an (A)BSL-4 Laboratory: 1. Biosafety Level 4 Suit Laboratory Suite Entry and Exit Procedures
Published on: October 3, 2016
Finding the right approach. What do you mean, this is a non-permit required confined space?
1EHS Compliance & Training Programs for specialty Technical Consultants Inc, Oakland, CA, USA. bbrown@stcenv.com
Abstract:
While not a big fan of the non-permit confined space designation, I have come to believe the approach can work if done properly. However, it is this author's opinion that the designation of a confined space as non-permit required in any work environment should be the exception rather than the rule. The up-front determination that a space is "non-permit-required" should necessarily consume more time and resources than assuming the space is "permit-required" because so fewer controls are in place. Most certainly, this decision must be based on the knowledge that no hazards are present or have the potential to develop, rather than on "convenience" or "resource limitations"; assumptions should never play a part in the decision. Attention to proper evaluation of confined spaces, documentation of actual conditions over time, and communication to those entering the spaces are all critical components of a safe confined space entry program, whether the space be permit-required or not.
Related Concept Videos
Personal Protective Equipment
Design Consideration
The factor of safety is another key aspect...
Cardiopulmonary Resuscitation II: ACLS Airway Management
Survey Safety
Taping Over Different Ground Profiles
Optimization Problems

