Standoff distances are the minimum distances that must be maintained between a potential explosives hazard and other structures or locations to mitigate the effects of an explosion. They are based on factors such as the quantity and type of explosives, the expected blast overpressure, and the desired level of protection.
In the case of an earth covered magazine with 100000 lb high explosives, the standoff distance to the station administration building would be determined by a number of factors, including:
* The type of explosives being stored (e.g., TNT, RDX, etc.)
* The net explosive quantity (NEQ) of the explosives being stored
* The construction type of the magazine (e.g., earth covered, concrete bunker, etc.)
* The desired level of protection for the station administration building (e.g., partial protection, full protection, etc.)
Once these factors have been determined, the appropriate standoff distance can be calculated using a variety of methods, such as:
* The DoD 6055.9-STD method
* The Army TM 5-1300 method
* The NFPA 654 method
The calculated standoff distance is then used to establish a safety zone around the magazine, within which no structures or activities are permitted. This helps to ensure that the risks associated with an explosion are mitigated to an acceptable level.
