Document qkMXbyjy97mZoRnMd7kM5E23q

O' -1TH I CONFIDENTIAL J. A. Krochta - Manville Environmental Control Department Research & Engineering Center May 22, 1969 ________________ PLAINTIFFS Iexhibiti Manville Textile Plant Special Survey_____ On Saturday, May 17, special dust counts were taken in the Carding and Twisting Departments. Selected areas were sampled before and after correction for comparison of results. Hie results of the sampling areas as listed in G. L. Swallow's schedule of May 5, 1969, are as follows: Test No. Location Reading Fib/cc >5 m la Card tender for #10 Card-equipped 1.9 with new enclosure lb Card tender for #11 Card-without 3.5 enclosure 2a Card room stocker new bag & box 6.8 blend feeder 2b Card room stocker - Manual feeding 11.4 by the standard old method 3a Aisle side of #10 Card-equipped 3.6 with automatic fly conveyor 3b Aisle side of #11 Card-not equipped 5.7 with automatic fly conveyor 4-la Twister operator for 05 twister (north side). During wet process 3.2 4-2a Twister operator for#6 twister (south side). During wet process 4.4 4-lb Twister operator for 05 twister (north side). During dry process 14.7 4-2b Twister operator for 06 twister (south side). During dry process 11.4 J. A. KrochCa - Manville 2- May 22, 1969 All samples were taken by the Membrane Filter Technique. The J-M accepted standard by this method is 6 fib/cc. Aisle samples 3a and 3b were station samples while the remaining tests were personal samples. The Card Room Stocker tests were obtained only during the actual feeding process. Twisting by the wet process showed a marked decrease in the visible du6t concentration around the twisting frames. EJB/aa H. B. Moreno - GIIQ cc: C. J. DeBiase - Manville File: E. M. Fenner C E.