Document ym1YBNX0Qz5Or6GzvNBNxmOy3

composition drake shops I LEAD & ASBESTOS EMISSIONS INTO THE ATMOSPHERE DURING BRAKING January 30 , 1978 R. H. Alber Sales Manager ANCHOR Brake Shoes Ryckman Edgerley Tomlinsonand Associates, Environmental Engineers, conducted a study of lead and asbestos emissions from ANCHOR Brake Shoes on 09/02/76. Mine Safety Appliance's gravimetric samplers were placed at . three locations around the American' Steel Foundries railroad wheel dynamometer in Granite City, Illinois. - Appropriate filters were used and analyses were performed according to procedures recommended by the National Institute of Occupational Safety and Health (Phase contrast microscopy for asbestos and atomic absorption spectroscopy for lead) Testing conditions were designed to give the greatest possible exposure situation. A series of 90 MPH stops were made using a wheel load of 21000 pounds and a 6000 pound brake shoe load. The total material loss during these tests were 382 grams. These were exaggerated conditions since the normal AAR Official dynamometer test results in losses of about 60 grams of brake * shoe materials. Locations monitored included: 1. The operators console 2. 15 feet downwind from the shoe 3. 30 feet downwind from the shoe (The wind is generated by a pedestal fan cooling the shoe/wheel contact area) Results of the analysis of test samples collected were: Location I 2 3 No. of Tests 9 4 8 Lead mg/m^ Result 0.044 0.100 0.036 OSHA Max. 0. 200 0.200 0. 200 Asbestos fibers/ml 0.052 . 0.080 0-036 Result 2.0 2.0 2.0 OSHA Max. COMPOSITION DRAKE SHOES LEAD & ASBESTOS EMISSIONS INTO THE ATMOSPHERE DURING QRAKING WEST CHICAGO P age 2 CONCLUSIONS: The critical locations monitored indicated airborne concentrations well below the permissible O.S.H.A. standards. Since these tests were much more severe than normal braking conditions, the expected lead and asbestos emissions into the atmosphere should be even less than these safe amounts. R. D. Fleck Director Research and Develooment RDF:meo ?.S. O.S.H.A. Material Safety Data Sheet to follow. cc : D3W . JD? FILE BOOK