Document 4J85xL1LJK0QbX2qe5Ew9nzOx

THE DISCOVERY COMPANY UNION CARBIDE CORPORATION MINING & METALS DIVISION P.O. BOX 579 NIAGARA FALLS, N. Y. 14302 TEL: 716-278-3376 September 4, 1974 Mr. R. Favero Plant Manager Georgia-Pacific Corporation Marietta, GA 30060 Dear Mr. Favero: Enclosed is the report of our findings on the air samples collected at your plant on August 7, 1974. We believe the report to be self-explanatory, however, if you have any questions or wish to discuss the results further, please do not hesitate to contact either Jack Walsh at our Atlanta, Georgia sales office or me at the above address. We look forward to serving you. Very truly yours E. J./Kleber Customer Service Representative EJKrcjb Enclosure CC: Mr. J. E. Walsh AIRBORNE FIBER COUNTS for Georgia-Pacific Corporation Marietta, Georgia September 4, 1974 Samples Collected By: J. E. Walsh Union Carbide Corporation Samples Analyzed By: E. J. Kleber Union Carbide Corporation Union Carbide Corporation Mining and Metals Division Niagara Falls, New York OBJECTIVES Monitor airborne asbestos fiber at Georgia-Pacific Corporation, Marietta, Georgia, a manufacturer of joint cements. OPERATION MONITORED Air samples were collected August 7, 1974 during the makeup of two batches of ready-mix tape joint cement. Personal breathing zone samples were collected from the operator (Larry James) during the addition of asbestos and other dry ingredients. EQUIPMENT AND PROCEDURE Sampling and dust counting were carried out in accordance with OSHA Regulation 1910.93a, using the Bayer, Zummalde and Brown method for counting asbestos fibers by phase contrast microscopy (Bureau of Occupational Safety and Health, Feb. 1969). Battery-powered air pumps (M.S.A. type) calibrated to 2 liters per minute were used to collect personal breathing zone samples on millipore membrane filters of 0.8 micron porosity. Fiber counting was performed on a Vicker's phase contrast microscope utilizing a Porton reticle for sizing and field definition. TEST RESULTS Reported as fibers greater than 5 microns in length per cubic centimeter of air sampled. A fiber is defined as a material having an aspect ratio greater than 3:1. SUMMARY OF FIBER COUNTS Sample No. 1-41 J-15 H-l 7 1-17 Sampling Time 5 min. 7 min. 7 min. 4 min. Description Personal - Operator (Larry James) during addition of 212 pounds Canadian 7RF9 and 87.5 pounds "Calidria" Asbestos SG-210. Personal - Operator during addition of all other dry ingredients in batch. Personal - Same description as 1-41 on next batch. Personal - Same description as J-15 on next batch. Fibers/cc >5M 15.7 3.1 20.9 5.8