Matrix provided the structural, mechanical, and electrical engineering necessary for providing a dry storage, unloading and empty drum magazine storage for an existing P2O5 drum filling operation. Phosphorus Pentoxide is very hygroscopic forming hot phosphoric acid when it encounters water. Therefor packaging with wet drums stored outside caused a significant problem. The design consisted of a semi-trailer unloading dock where trailers could remain parked while keeping mobile dry drum storage out of the weather and could be unloaded as packaging campaigns dictated. Gravity conveyor magazines were designed so that an operator could unload enough drums out of the truck trailers for. This arrangement also saved labor since it eliminated "double handling" of the drums.