[PowderMonkey]

"Officials suspect cleaning chemicals in the restroom are to blame, but a specific cause had not been determined, Simmons said."

If cleaning agents are involved, they were brought together (ammonia and bleach) by someone who knew what would result. If by accident, they should have found a dead employee slumped over his bucket and mop.

[no-to-illegals]

Since there is a pungent odor associated with mixing these types of chemicals, then difficulty breathing, a question of why was the McD not evacuated and authorities not called sooner? Anyone know? Did someone attempt to empty a container where the chemicals were supposedly mixed? Have any witnesses been spoken with?

[wintertime]

If cleaning agents are involved, they were brought together (ammonia and bleach) by someone who knew what would result. If by accident, they should have found a dead employee slumped over his bucket and mop.
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Good point! You win the “Mr. Monk Award” of the year!

[discostu]

When I worked at McD there were at least 4 occasions when guys accidentally mixed bleach and ammonia. None of them wound up doing more damage than giving the person in question a viscous headache, but they all did it in large rooms too. It would be easy to do on accident and walk away, like to clean a toilet (dump them in the toilet and let them get some soak). It’s a tempting mixture for the uninformed cleaner, they both have very desirable cleaning properties, generally the 2 best cleaners in the building. And you don’t generally have the brightest and best working in fast food.