Reading the report indicates that whoever filled the drum showed a fundamental lack of basic chemical knowledge.
Your don't -ever- store nitric acid (whether as acid or neutralised) on or in anything carbon based. In this case they had a mix of nitric acid and acid salts, neutralised with triethanolamine, in PVC bags, with an adsorbent layer of ground dessicated wheat husks.
So many things to go wrong, but the obvious is the risk of producing nitrocellulose = bang
Biting the hand that feeds IT
