Document 3NrX5ovv8a9y3X2EJm509j4qD

FILE NAME: Union Carbide (UC) DATE: 1971 Dec 7 DOC#: UC358 DOCUMENT DESCRIPTION: Memo RE Toxicology Update - "I ik t e ::n a l MINING AND essrs. fg ftfemt} DWa'oil Iseeftal R . . G. L. B. L. ;'."?ALS Byrnt Di ckson [ nga 1I s DIVISION E. J. Kleber T. P. Norris H. B. Rhodes essrs. CP7 tv F . H. L a r r i s o n P. V/. McDaniel E. A. Pi ersaI I J . W. Raw I i ngs * P 0. BOX 579, NIAGARA FMIS. MEW YORK 1430? ,, December 7, 1971 pal CALlDRtA Asbestos - Marketing OrtgUeting Ppt Research and Development Department A im n d ij b f l ir M i td jid Toxicology Update The f o llo w in g in form a tio n is presented in an attempt to prepare you t o answer customer q u e s t i o n s w i t h some degree of n t e l I i g e n c e . There a r e s t i l l many g r a y a r e a s but t h e government a g e n c i e s i n v o l v e d a r e t a k i n g some a c t i o n . The Envi ro nm ent al P r o t e c t i o n Agency (EPA) is r e s p o n s i b l e under the Clean A i r Act fo r non-occupat iona i exposure c o n t r o l . They have j u s t i s sue d proposed s t a n d a r d s which i n c l u d e no T L V ' s f o r any p l a n t , mine or m i l l e m i s s i o n s . They ar e proposing t h a t f a c i l i t i e s use fa b ric f i l t e r s to prevent emissions to the atmosphere. The Depart ment of Labor th rou gh the O c c u p a t i o n a l S a f e t y and H e a l t h A d m i n i s t r a t i o n (OSHA) is r e s p o n s i b l e f o r o c c u p a t i o n a l exposure. They " depend" on HEW and the ACGIH ( A me r ic an C o n f e r e n c e of Gover n ment I n d u s t r i a l H y g i e n i s t s ) f o r g u i d a n c e in e s t a b l i s h i n g T L V ' s I ( T h r e s h o l d L i m i t V a l u e s ) and a s s o c i a t e d i n f o r m a t i o n . The p r e s e n t TLV f o r a s b e s t o s is p u bl is h ed in the Fe deral R e g i s t e r , Volume 36, No. 157 - F r i d a y , 'August 13, 1971 as 2 mppcf ( m i l l i o n p a r t i c l e s per c u b i c f o o t ) or 12 f i b e r s g r e a t e r than 5 mi cr on s per m i l l i l i t e r of a i r . The ACGIH has recommended the l a t t e r v a l u e be lowered to 5 f i b e r s and t h i s may become e f f e c t i v e in May 1972. The AFL-C10 has j u s t r e q u es t e d t h e Department of. Labor t o t a k e emergency a c t i o n and lower t h e v a l u e t o 2 f i b e r s g r e a t e r than 5 microns per m i l l i l i t e r of a i r . Based on our b e s t a v a i l a b l e and c u r r e n t i n f o r m a t i o n , t h e r e a r e two r e s p i r a t o r s whi ch we can s ug ges t our cu st ome r s use f o r a s b e s t o s d u s t . These ar e the W i l l s o n Model No. 1009 w i t h R-520 f i l t e r and ^,SA No. 66432 w i t h Type "H" U l t r a - F i l t e r s , d e s c r i b e d in a t t a c h e d s h e e t s . Both of t h e s e a r e approved by t h e Bureau of Mi nes f o r h i g h l y t o x i c d u s t s w i t h T L V ' s l e s s than 2.4 mppcf. These a r e on the Bureau of Mines Approval L i s t 2IB in t h e i r Information C ir c u l a r 6436, d a t e s 12/31/63. We should d i s c o n t i n u e recommending the _ W i l l s o n No. 600A, which has been used a t the -plant. The p l a n t w-i I ! p r o ba bl y change t o one of the above. P L A IN T IF F 'S EXHIBIT U C -1546 We f e e l t h a t t he two s ug ges te d masks w i l l r e a d i l y conf orm t o even t h e most s t r i n g e n t new r e g u l a t i o n s . ' A t t a c h e d is the l a t e s t I s s u e we have of t h e F e d e r a l R e g i s t e r which l i s t s T L V ' s . A s b e s t o s I s in T a b l e G-3 a l o n g w i t h amorphous s i l i c a C a b - 0 - S I ) and o t h e r m i n e r a l s . T h i s l i s t may be of v a l u e i f your customers have questions about other m a t e r ia ls . There i s general agreement on t h e f o l l o w i n g : 1. A s b e s t o s i s an i m p o r t a n t m i n e r a l n e c e s s a r y t o t he Ameri can economy. I t s use w i l l not be o u t l a w e d . 2. Asbestos is a c o n t r o l l a b l e occupt Iona 1 hazard, not considered a serious hazard to the general pub!ic. 3. A s b e st o s bound in r e s i n o r s i m i l a r compounds o r systems does not c o n s t i t u t e a hazard. 4. A s b e st o s can c a us e lung damage and may, e s p e c i a l l y in c o mb i n a t i o n w i t h some o t h e r s u b s t a n c e , be associated with cancer. ` We a r e p r o ce ed i n g as r a p i d l y a s p o s s i b l e t o d e ve lo p an a c t i o n p l a n . At t h e r e q u e s t of many cu st o me r s we a r e p r e p a r i n g a b o o k l e t o r r e port for public dissemination. This wi l l o u tlin e Corporate .views on t h e g e n e r a l s u b j e c t of a s b e s t o s t o x i c o l o g y . None o f t he i n f o r m a t i o n i n t h i s l e t t e r s houl d be c o n s i d e r e d as C o r p o r a t e p o l i c y and you shoul d t r e a t i t a c c o r d i n g l y . Jo h /cb Attachments