Document peJw7jmNyNaQz7Zv48KxaVB07

RE: GARLOCK, INC. RESEARCH PROJECTS SUMMARY (Prepared by Carl A. Mangold, CIH) Ref: Gaskets, wps (and others as noted) October 1997 DATE__________ TITLE & DATA___________________________ 1. October 1982 (Mangold) Actual Contribution of Garlock Gasket Materials to the Occupational Exposure of Workers. a. U.S. Navy - 1978 PSNS Report - basis & review b. Hand Punching Machine Punching Machine Shearing [Average .02 fibers/cc, 8 hr TWA Machine Nibbling for all operations tested] Flange Gasket Process c. Cities d. Clothing Average .01 to .02 fibers/cc Up to 1.4 fibers/cc from clothes 2. December 1982 (Mangold) Actual Occupational Exposure to Airborne Asbestos Released by Garlock Spiral Wound, Braided and Encapsulated Gaskets. a. Breathing Zone (Bz) Average .004 fibers/cc, 8 hr TWA b. Background Average .004 fibers/cc, 8 hr TWA 3. March 1983 (Mangold) Asbestos Fibers in the Ambient Air in the Greater San Francisco Bay Area. Cities: S.F, Oakland. Vallejo - Average .02 fibers/cc over 5 days. 4. November 1983 (Mangold) The Actual Contribution of Asbestos Fiber Exposure During Gasket Removal from Pipe Flanges Aboard Ship. a. USN Gypsy Average .03 f7cc, 8 hr TWA b. Off-Shore 1 Average .02 f/cc, 8 hr TWA c. Remote locations Average .02 f/cc, 8 hr TWA d. About 40 to 50% Garlock gaskets were found when flanges were opened. 5. December 1983 (Mangold & Wendlick) Ambient Asbestos Fiber Levels in the Metropolitan Areas of Norfolk-Portsmouth-Newport News, Virginia. a. Four Sample Locations b. Five Days of Sampling c. Average .01 to .02 f/cc, 8 hr TWA 1 6. September 1985 (Mangold) The Actual Release of Asbestos Fibers from New, Used and Flanged Garlock, Inc. Asbestos Gasket materials. a. Five day trials each in a 10' x 10' x 10' enclosure. b. Intact Gaskets Average .002 free c. Newly Cut Gaskets Average .005 free d. Old Used Gaskets Average .006 free 7. June 1987 (Mangold) Asbestos Composition of Garlock, Inc. Braided Gasket Materials. (Valve Packing Study) a. Styles 733 Black & 5862 White Garlock, Inc Valve Packing. b. Breathing zone samples did not exceed .005 free. c. Composition data shows 40 to 60% Chrysotile 8. July 1986 (Mangold) Comparison of the Tyndall Phenomena to the Actual Concentration of Airborne Asbestos Fibers in the Breathing Zone of Workers. a. Visible fibers are not directly related to asbestos fibers of toxicological significance. b. The Tyndall Effects cannot be used as a measure of exposure to tiny fibers unseen by the eye. c. Viewing fibers in a box with strong light does not relate to actual occupational exposures. d. Estimates of airborne fiber concentrations are not possible. 9. January 1989 (Mangold) The Actual Contribution of Airborne Asbestos Fibers to the Occupational Exposures of Bystanders during Selected Processing of Encapsulated Gaskets. (8 hour time-weighted Average) Cutting with a Circular Cutter Bz .005 free Bystr .003 free Gasket Cutting with Hand Shears Gasket Cutting with Ball Peen Hammer Scribing of Gasket Materials Opening of Old Flanges and Removal of Asbestos Gaskets (USN Gypsy) (some gaskets 40 years old) Bz .005 free Bystr .004 free Bz .005 free Bystr .005 free Bz .005 free Bystr .003 free Bz .005 free Bystr .001 free 2 6. Flange Face Scraping with a Putty Knife Bz .005 f/'cc Bystr .001 f/cc 7. Hand Wire Brushing of Asbestos Gasket Residual from Flanges Bz .007 f/cc Bystr .003 f/cc 8. Power Wire Brushing of Flange Faces Bz Bystr Notes: 1. Bz = Breathing Zone of Worker 2. Bystr = Bystander 5 to 10' from Worker .009 f/cc .001 free 10. January 1992 (Mangold & Gay) Garlock Packing Removal and Installation from Valves. (8 hour time-weighted average for 8 valves) a. Operator # 1 (Carl Mangold, CIH) Bz .014 f/cc b. Operator # 2 (Robert Gay, PhD Bz .009 free c. 5' away from operation (4 locations) Bystr .005 free d. 1 O' away from operation (4 locations) Bvstr .004 f/cc 3