<<Disclaimer:  Verify this information before applying it to your situation.>>

Grain dust in the air should be considered in discussions with
companies that process multiple grains. Two examples:

I know a well respected celiac who walked through a rice flour mill
while they were also processing wheat flour.  She had a definite
celiac reaction and never finished the tour.

A company that produced a snack bar that was labeled GF, recieved
numberous reports of celiac problems after a nearby  machine was used
to produce a snack bar with oats.

In the snack bar situation, the danager was greater because of the
number of bars eaten in a short period by several celiacs.  Their
primary source of food while driving for several hours.  The bar is
currently off the market after the removal of the GF label.

Michael Jones, Internet [log in to unmask]
Living a wonderful life, gluten-free.