Document a1qOOza3p9G4qQB7dVpOoerYb

WRG C0Cr95 April 9. 1964 Mr. C. A. Pratt, Vice President Western Mineral Products Company l725 Olson Highway Minneapolis 22, Minnesota dear Cap: I have a copy of your letter of April 2 written to J< A. Kelley, together with copy of letter to you from Or. V. E. Park. Following are answers to the questions esked by Or. Park. 1. The percentage of treootlte In the ore (concentrate) varies depending on the feed to the ml 11 at the time It Is produced. With the circuit we now have In our mill. It would be prac tically nil on our 03 and #4 sixes. On the 01 slxe there would be somewhat more but the percentage would still he extremely low. The greatest quantity of asbestos would ordin arily be found In the fl slxe, and It Is our opinion that this would average less than IX. It is true that on occasion, how ever, It might be Slightly higher than this. 2. The follow-up survey on the blanket X-Ray conducted In 1959 has not been dona. It Is possible that this will be done this Sumner. 3. The employee mentioned died In February !S&0. We have no more Information on this man which would be of Interest or value. No autopsy was conducted. Or. J. M. Cairns, Libby, Montana, was his local doctor. He was In the Montana State Hospital, Galen, Montana, from February 11 to March 20, 1959* Perhaps some further in formation would bo available from these sources. This Is all of the available Infonaatlon on these questions. Vf Mr. C. A. Pratt Page Two April 9, 1964 Mt feel we have made progress on the dust problem locally, both In our llllng operation which affects our people, end In the concentrates which are shipped out. We have a dedusting unit at our loading station Wilch operates when our Material Is being loaded. A ccnblnatlon of there being fewer fines in our concentrates because of all ling changes and removal of dust when the product Is shipped, which formerly went Into the car. should result In a cleaner product to our customers. Very truly yours ZONOUTE DIVISION W. A. GRACE A CO. 8y: E. 0. Lovlck EDL/Jbg c.c. J. A. Kelley 1 51*490**