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One other important point is that not all the particulate emission is asbestos. The major fugitive emissions at the minesite are thought to be mainly rock dusts. No analysis results of asbestos vs. non asbestos amounts are known at the present time.

If we assume only 5% by weight of all emissions f rom all sources are actually asbestos, then the annual estimates appear to be in agreement with national asbestos emission inventory data (Canada 1970 estimated 16293 tons from mining and milling.) The other 95% is rock dusts & fuel particulate, but mainly the former.