Sometimes, safety rules can be impractical. This can happen if the safety measure compromises the experimental intent, for example, or if it protects against a hazard that is not actually present in that specific case. Excessive cost can be a reason to vary from standard safety practices as well.
When it is necessary to omit a standard practice, it is often possible to craft solutions that offer equivalent safety. This can involve anything from simply getting permission from Health, Safety, and Environment (when there is no actual hazard) or completely re-evaluating the experimental design and construction with the help of a safety professional.
Contact Dan Kuespert, Lab Safety Advocate, for assistance in identifying solutions and getting permission to vary from JHU requirements.