Document KJYje7GyMp2gp9kQ9vb4nZJj0

tmtMIMI E. I. DU Pont de Nemours & Company no Wilmington, Delaware 19898 legal department October 16. 1984 Docket Officer Docket No. H-033C Rood S-6212 U.S. Department of Labor Third Street and Constitution Ave., Washington. D.C., 20210 N.W. Re: Occupational Safety and Health Administration Proposal to Revise 29 CFR 1910.iooo - Asbestos Po6t-Hearing Brief of E. I. du Pont de Nemours and Company Dear Sir: In the pre-hearing comments of E. I. du Pont de Nemours and Company (Du Pont) re the- above-referenced proposal, the company requested to submit for the record a study it was conducting on workplace protection factors for elastomeric half-mask and single use respirators. The study was begun in 1983 and was not completed in time to present at the public hearings in June and July. The study is now finalized and is attached as exhibit A to these comments. The authors of the study are Stephen W. Dixon. Supervisor. Industrial Hygiene. Haskell Laboratory for Toxicology and Industrial Medicine, and Thomas J. Nelson. Coordinator, Industrial Hygiene, Finishes and Fabricated Products Department. Because the authors are considering publication, we would appreciate limited distribution of the study. The Du Pont Respirator Study In the Du Pont respirator 6tudy, workplace protection factors for elastomeric and single use half-mask respirators S99 DUP 0907323 SC-DP-07825