Document aBR37Xkgm1bDjpKoOjK25vnB9

WF < UCi L. A DEPARTMENT OF HEALTH. EDUCATION. AND WELFARE PUBLIC HEALTH SERVICE CENTER FOR DISEASE CONTROL f NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH ROBERT A. TAFT LABORATORIES 4676 COLUMBIA PARKWAY. CINCINNATI. OHIO *3*26 October 9, 1979 Mr. Einar D. Home Technical Director Occupational Health Safety Products Division/3M 230-B 3M Center Saint Paul, Minnesota 55101 Dear Einar: On behalf of John Crable, Larry Doemeny, Chuck Geraci, Mary Lynn Woebkenberg and myself, I want to thank you and your co-workers for taking the time to meet with us on September 25. We found the exchange of information quite useful, as I hope you did. Because of our meeting, we are able to liberalize our recommendation on NIOSH's use of the Organic Vapor Monitor #3500. Due to the discrepancy over methylene chloride, our immediate recommendation will be to encourage use of the OVM #3500 for those compounds which have a complete set of data to verify, among other properties, the capacity, recovery coefficient and the upper exposure limit at high humidity of the badge for the compound. These data may come from a variety of sources which include your laboratories as well as ours. In general, my recommendation will involve increased usage for compounds with moderate to low vapor pressures and moderate to low TLV's. Conversely, I will continue to take a conservative approach with high vapor pressure, high standard compounds. As new compounds qualify, the use of the monitor will be expanded. For this reason, I am asking you to send qualification information to Dr. Charles Geraci and Ms. Mary Lynn Woebkenberg as it becomes available. Please keep in touch on this matter, as together we can do a great deal to promote the use of accurate and precise diffusion monitors in field industrial hygiene. Sincerely yours, A)<SLAfisjo^m, Walter M. Haag Director, Division of Physical Sciences and Engineering 008^70