: I work in a shop which is 35 x 40 feet. I have built numerous cedar strip
: canoes etc. etc. I have started building hardwood strip hull & ribbed
: kayaks with treated canvas top, but I'm getting in trouble with WHMIS
: because of the dust. I have been doing this kind of work for over 25
: years.

: I believe in an open door policy which is an 8 x 10 garage door on each end
: of my shop. When I am ripping hardwood both doors are wide open to get rid
: of the dust. I have asked & asked but nobody can give me the parts per
: million before sawdust becomes explosive with the flow through ventilation
: that I have. Why is this not safe?

: Parts per million (what would it look like?) I have no idea, I would like
: some information because I cannot afford a dust extraction system.

: Thank you. Jake

Why wait? Spend a weekend and clean that up. It can easy your mind and creat a easier and cleaner work area. Besides, you would less likely lose your small tools or bits when you put them in the saw dust. Cleaner is better!