Document 0J4wzVonB1n4eK0JXzDMwr4dx

20 NO LI TE DIVISION W. R. GRACE & CO. E. D. lovlck LIBBY. MONTANA TELEPHONE 2B3-4IS Hy I, 1969 W. C. Nordin ifittr Kostic, R. J. Kujawa, J. 0. Rlggleman The April 1969 dust counts* taken April 29* 1969* for the Dry Mill floors are tabulated below. During the sampling period there was a sweeper on the 4th floor and a dust source was being repaired on the second floor. During the sampling period the wind was 4-12 MPH from the south* temperature was 44F end the barometer read 29*92. Floor 6 5 4 3 Half Deck 2 Dust Counts iSBSSfl 12.3 78 133 7.1 8.8 8.2 6.8 WCNordln/Jbg 15163039