Document Ddm4ZyBzxbjnm6jX4zw9MwEBn

June 21 1977 APPENDIX I Procedure for Measurement of Airborne Concentration Respirable Particle ARP A 9 oz containeorf powder is placed in a mechanical device shaken vertically at a fixed rate to deliver about 1 gram of and powder The shaker is located within a closed chamber so that any airborne dust is contained within the chamber and is rapidly dispersed and uniformized by means of a small circulating fan The airborne dust is sampled with a 10mm nylon cyclone at a 1.7 min flow sized particles rate The cyclone separates out and delivers them to a TS1 3210A the respirable quartz crystal mass monitor for weighing The concentration of respirable particles as mg in the chamber is monitored and printed out every 10 sec ' @' The the The peak ARP concentration and the average ARP concentration for first two 2 minutes after shaking are measured and recorded peak concentration is normally reached in the first 10 sec following shaking i The number of shakes and the powder delivered from the container . are also recorded as data R. S. Russell ee me er nok . Protected Document to Protective Order JNJTALC000089023