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.
1 Freezing spinach diminishes its health benefits. The way to get the best from the leaf is to buy it fresh and eat it the same day.  Do place spinach on your organic shopping list, because the leaf tends to be sprayed heavily with pesticides that dont come off with normal washing.