When we responded to the call, we found 96 cans were bulging. This chemical can become extremely dangerous if stored improperly for extended periods of time due to the formation of explosive peroxides. We did this by exploding them in a controlled fashion vs. waiting for them to explode in the school. We received a call about a garage where racing tires and methanol had been left by a former occupant. This situation would not appear dangerous to the common eye but it was to us.
Methanol is an extremely flammable liquid.
We have been called by numerous schools to remove potentially explosive Picric Acid from their labs. There are many similar cases, all of which would not appear to be dangerous to a layman. Fortunately, we got there first and recognized the hazards present.