As part of a product manufacture process, dry sodium hydrosulfite and soda ash are combined into a hopper from which they are repackaged. Due to quality control concerns, an 8,000 pound batch on the afternoon of 6/26/2014 was set aside by operators fur further evaluation. The material was temporarily divided and placed into four "super sacks" (a woven polypropylene container) and was left in the hopper building. On the morning of 6/27/2014, an employee arrived at approximately 0500hrs and discovered a while plume of smoke eminating from the hopper building. The contents of at least one super sack had cumbusted and impacted an adjacent sack.
