Arc Flash Boundary (ARC) - is the distance at which an electrical arc can flash. outward, which may endanger employees working on electrical equipment. Flash Protection Boundary (FPB) - theJcalculated safe working distance from. electrical equipment which would not expose the employee to the hazards.
One advantage of freeze drying is that food preserved in this method can last longer than food preserved in virtually any other way. Freeze dried foods, if stored properly, can last for years, even decades, and taste exactly as they did the day they were bought fresh.
Freezer burn is not a safety issue. Simply put, it's damage caused by the surface of the food drying out from exposure to dry freezer air which affects color, texture and flavor. Since the process happens at below freezing temperatures, bacteria growth is not a problem.