The next priority is to units that recently left contaminated areas. The third priority is to units deployed in forward areas. Class III Class III supply is critical in NBC environments. More frequent unit moves increase consumption. Emergency resupply of isolated units may be by air.
Storage tanks protect bulk petroleum to a large degree.
However, caution must be taken to reduce contamination on tanks. Class V Resupply is done at night as much as possible. Ammunition support elements are responsible for decontaminating ammunition under their control, though deliberate decontamination may require additional support. If the situation requires the issue of contaminated stocks, the standard NATO NBC marker will be used. After issue, the user performs required decontamination.