Document MJm34n5zEmnv4OjbDbE2wzQ9a

.4 GRACE ZONOLITE DIVISION W. R. GRACE A CO. E. 0. Lovlck January 4, 1969 oms V. C. Nordln ^Htar Kostlc, R. J. Kujawa, J. 0. Itlggleman 036<80'.3 Due to the extreme cold during the last part of December, the Deceober .dust counts were postponed until today. Since the mill has been In operation for almost two full days. It should have reached a state of equilibrium In regard to airborne dust. There were large plies of ore on the dry mill floors during the sampling period due to plugged chutes and other equipment. The temperature was I8F, wind was 1*2 MPN from the northwest, and the barometer read 30.60 during the sampling period. ,v- *-?> 6 5 4 3 Half Deck ' 'v" 1 Dust Counts fmpocf) 9.8 5.4 5.6 3.4 7.8 1*4 r WNordin/jbg 15163037 >