Document YGG22aMOkMngm0DgVB0p04jLO

ASBESTOS DUST SEMINAR AGENDA SEPTEMBER 11, 1973 - NEMOURS 3419 1. Recommended Sampling Techniques: Minimum number to establish dust level during demolition. What Textile Fibers routine jobs exceed TWA or ceiling limits. 2. Status of Non-Asbestos Containing Thermal Insulation. Periodic Information Bulletins. 3. Smoking and Eating in Work Areas Where Asbestos is Handled. 4. Legal Requirements for Protective Clothing. b. Physical Separation of Insulation Shop from Adjacent Areas. G. Legal Requirements for Dual Lockers, Change Rooms, Laundering, Etc. 7. Damage to Body Organs Other th%n Lungs Caused by Asbestos. 8. Recent OSHA Plant Inspections. 9. Review of Experience with Respirators (Disposable, Supplied Air, Etc. 10. Engineering Recommendation on Portable (Hand Carry and Roll-Around) Vacuum Cleaners. New Items With asbestos-free materials here, should we be sampling, protecting, etc., against other insulating dusts such as glajss, silicates, and diatamaceous earths ? Would the levels released require use of down draft tables and other dust control shop devices ? Definition of a "toxic material. " ' ''K New vacuum exhaust in regard to the ANSI Bulletin. . Is exposure to mineral wool dust considered a problem? U1211/s 9/G/73 DUP 0903252 J OS 8 98 SC-DP-04450 MEETING PARTICIPANTS CHATTANOOGA J. L. McCLANAHAN MARTINSVILLE G. D. CAMPBELL F. L. BRYANT SEAFORD R. W. CALHOUN SPRUANCE W. J. VENABLE CAMDEN B. E. RANSOM J. F. WATSON WAYNESBORO E. M. O'DONNELL CAPE FEAR M. E. SAB LA COOPER RIVER KINSTON R. P. COON E. L. LONG W. S. McMAHON OLD HICKORY H. B. BARRETT G. B. KIRKPATRICK CHESTNUT RUN R. D. LANDSBERG D. R. RODDEN RBH/sss 9/6/73 DUP 0903253 JO8899 I '/ \ ASBESTOS DUST SEMINAR TENTATIVE AGENDA SEPTEMBER 11. 1973 NEMOURS 5419 Recommended Sampling Technique:: Minimum number to establish dust level during demolition What Textile Fibers routine jobs exceed TWA or ceiling limits Physical Separation of Insulation Shop from Adjacent Areas Legal Requirements for Protective Clothing Legal Requirements for Dual Lockers, Change Rooms, Laundering, Etc. . Smoking and Eating in Work Areas Where Asbestos is Handled Recent OSIIA Plant inspections Status of Non-Asbestos Containing Thermal Insulation. Periodic Information Bulletins Review of Experience with Respirators (Disposable, Supplied Air, Etc.) Damage to Body Organs Other than Lungs Caused by Asbestos Engineering Recommendation on Portable (Hand Carry and Roll Around) Vacuum Cleaners RBlI/sss 8/24/73 DUP 0903254 J OS 902 TENTATIVE PARTICIPANTS CHATTANOOGA J. L. McCLANAHAN MARTINSVILLE G. D. CAMPBELL SEAFORD R. W. CALHOUN SPRUANCE W. J. VENABLE or T. J. HAMPTON CAMDEN B. E. RANSON J. F. WATSON WAYNESBORO E. M. O'DONNELL CAPE FEAR M. E. SABLA COOPER RIVER KINSTON R. P. COON ? OLD HICKORY H. B. BARRETT G. B. KIRKPATRICK CHESTNUT RUN J. D. REICHLEY RBH/ssc 8/24/73 DUP 0903255 J 08903 TEXTILE FIBERS ASBESTOS DUST SEMINAR OF TUESDAY. SEPTEMBER 11. 1973 The current status of asbestos-free insulating materials continues to be brighter, but the progress from your last meeting, in July, 1972, has been slow and painful. You nay recalL that at the time of the previous meeting we had only two calcium silicate insulations that were asbestos-free and only one of those was satisfactory for use on austenitic stainless steel. At this time, fortunately, all of the calcium silicates we have listed in Engineering Standards SN100M are asbestos-free. There are five brands of Code 102, the uninhibited calcium silicate, and two brands which are approved for Code 102.1 for use on austenitic stainless steel. " There are two more brands that will be added to the inhibited calcium silicate listings under Code 102.1 by the end of this year. They are Johns-Manville's Thermo-12 and B<ScB Insulation, Inc's. "Pamsil", which is a Du Pont development. This will help us considerably in getting back to our previous prin ciple of using only the inhibited brands for all applications to avoid field mix-ups. At the time of the last meeting, I was pushing a high quality mineral wool by the U. S. Gypsum Co., known as K-fac. This can be inhibited by the fabricator by dipping it in sodium silicate solution. DUP 09032S6 J 08869 2 Asbestos Dust Seminar 9/11/73 It seems that this material took on so strong in the asbestos-free calcium silicate shortage,that U. S. Gypsum had to turn off their their industrial thermal insulation program. They were way oversold. U. S. Gypsum is still supplying all the needs of their first two fabricators, Atlas Insulation of Pittsburgh, Pa. and Starr-Davis of Greenboro, N.C.; but they have stopped promotion to any other fab ricators. I'd like to mention here that all of the mineral wool brands listed in Du Pont's Codes 114 and 114.1 are asbestos free. Johns-Manville still does not have an asbestos-free substitute for * their Marinite, which is l)u Pont's Code 130, Asbestos Board, and they hold no hope for one in the foreseeable future. There are no other manufacturers products which even approach Marinites physical characteristics. From Du Pont's standpoint however, there are no needs where Marinite is the only material that will suit. We can and are engineering around this material. All of the Insulating Cements, Code 502, and Insulating and Finishing Cements, Code 502.1 listed in Engineering Standards are asbestos free ``36. Our single greatest asbestos material problem at this time is finding an equivalent substitute for woven asbestos or "A" cloth. DUP 0903257 Gome of your people have been helping the Thermal Insulation Standards J 08870 3 Asbestos Dust Seminar 9/11/73 Subcommittee evaluate a product known as "Porterlag" by the II. K. Porter Company. In the trad^ it is known as a rewettable glass cloth. It is a glass cloth that is coated with a rewettable adhesive by the manu facturer (I have a small fitting cover that is covered with Porterlag No. 205, a 15 ounce treated glass cloth). These rewettable cloths must be protected from moisture or the adhesive will soften and come loose. This material is useable with hot side temperature to 800F. It is certainly not equivalent in strength or abuse resistance to "A" cloth, but where plant rulings eliminate the use of asbestos-bearing materials it is our best alternative so far. In summary, we are in good shape for asbestos-free insulations and accessories with the exception of woven asbestos cloth-and asbestos listing tape. George E. Lang/blm September 12, 1973 xsa DUP 0903258 J 08 871