Document gaykgL4wKJgZr2aMOa4aEQgqQ

* <* C v l istuusMniiK E. I. du Pont de Nemours & Company INCMPOftATKO Wilmington. Delaware 19898 POLYMER PRODUCTS DEPARTMENT R. M. H. A. W. E. R. W. H. L. FILE: PLAINTIFF'S SHEPHERD! SMITH V I EXHIBIT DUP-1832 THOMAS, | MORROW, immRF ADAM, BOD 1442 S-Al September 23, 1980 TO: FROM: J. F. DOUGHTY - WASHINGTON WORKS L. F. PERCIVAL p WORK WITH BRAKE LININGS Re: Attached In the attached note you requested a recommendation for personal protective equipment to be worn for protection against asbestos containing dust while replacing brake linings. No special protective clothing should be required, if monitoring results con tinue to show asbestos levels to be below OSHA and ACGIH limits. However, the two samples reported in the attachment are probably not enough to adequately characterize exposures, and more sampling is recommended. It is important to stress good personal hygiene habits (i.e., washing hands etc.), and also periodic checks on filters at the vacuum exhausts. After checking with several departments, Washington Works and Sabine were the only two sites that I was able to locate who do their own brake work. Haskell and ESD personnel had not previously addressed potential asbestos exposures from brake work. However, at my request, Dr. R. W. Morrow of Haskell contacted specialists at NIOSH who recommended that we rely on monitoring results using the standard analysis to help set protective equipment needs. Through S&FP Division contacts, I phoned G. Kortsha of General Motors who also backed NIOSH recomnendations. Mr. Kortsha said that they recommend rinsing the brakes out with water as a simple method that was as effective as vacuuming out the brake dust. Either method should be effective. As you indicated in your note, several articles have been recently published that have speculated about possible harmful effects from extremely small asbestos "fragments" ground off brake lining during use. These "fragments" are too small to be detected by standard asbestos counting analytical procedures. Any hazard from this source has not been defined enough to warrant special precautions. LFP/s ab Attachment There s a world o' things we ra doing something aoout DU 041586 DUP 0962126 I-4J NfV t 10 DMUMlib E. I. du Pont de Nemours & Company P. O. Box 1217v Parkersburg, W. Va. 26101 POLYMER PRODUCTS DEPARTTMMEENNT \ CC: W. A. Bower E. P. Whltzer H. H. Iovelady T. H. Spencer August 22, 1980 TO: L. F. PERCIVAL WXLMHGTON FRCM: J. F. DOUGHTY WASHINGTON.WORKS Oir-nXL WORK WITH BRAKE LININGS Washington Wbrks wculd like an official reaarmendation concern ing the proper personal protective equipment to be worn while replacing brake linings. We will be adopting a policy of vacuuming the drums and shoes to remove dust. Two air samples taken under normal work conditions even without the vacuuming have shown 0 fibers. However, the attached articles, one of which you sent vis, shew that there still may be a hazard. We do not have a basis on which to decide if we need: no further protection, sene protection, or ocnplete protection. Other locations which do their own vehicle maintenance vrork would probably also be interested. DUP 0962127 JFD:mah Attachments There's a world of things we re doing something about DU 041587