Over the years I have posted several articles about hazardous materials being unloaded to the wrong tank. And it seems that each time I do I get several e-mails stating how rare these events are and that I am being an alarmist. So I thought I would post a section of a PHMSA Investigation Report from an incident where Sulfuric Acid was unloaded into a tank with Hydrochloric Acid. The host facility knew what was in the tank; however, they did not inform the driver of the tank contents. The acid tank was NOT labeled and things go downhill from there. Count the number of failures from this listing of the events leading up to the gas release…