Document rBV7vpBJaEerdnyVd4LkY2KG0

FILE NAME: Union Carbide (UC) DATE: 1969 Apr 3 DOC#: UC167 DOCUMENT DESCRIPTION: Internal Report - Asbestos Toxicology Report with Cover Letter Noting Changes in Threshold Limit Value M essrs: C. B e n ja m in T. F. F ranges B. E. G odard J. L. M yers J. A. Riddle N. J. S e t t e r J. T . Sinclair J. R. Stickney W. S. Young A pril 3, 1969 Medical Department A sbestos --------------- . v p r ? *::; 3 UC.C. VUV Pi-ASTiCS Gentlemen; Both b ecau se of changes in regulations and av ailab ility of d a t a d e v e l o p e d a f t e r t h e i s s u a n c e of o u r r e p o r t i n 1964, Dr., D e r n e h l and I have revised the asbestos m em orandum , A copy of the revision is enclosed. The m ajor changes are the decrease in the Threshold Limit Value f r o m 5 m illio n p a r ti c le s p e r cubic foot of a i r to 2 m illio n p article s p er cubic foot of air. (There is also a pro v isio n for a n o th e r m e th o d of counting but it does not a p p e a r ap p licab le to our short fiber asb e sto s. ) We b riefly discuss m e so th e lio m a s, but data is too s c a n ty as yet fo r a d efinite policy to be e s ta b lis h e d . It is w orth m entioning that the A m e ric a n C onference of G overnm ental In d u s tria l H ygienists c o n sid ere d in 1968 a r e q u ir e m e n t that airlin e re sp ira to rs be required for all contact with crocidolite asbestos. The reso lu tio n did not p a s s , but m a y com e up again in future m eetings. Any questions or com m ents will be welcome. Very truly yours, KSL:lk Enclosure '-'(J ' K. 'S. ' L a n e , M./lD. " Assistant Medical Director UCC 020786 a s b e s t o s p r o d u c t i o n -were p r o n e t o a e v e x o p a *ano; c l s e a s e . m ^rr.c, t m . s conci...^nn ce-cam-e c c . t t e s a s m o /.as r a t ^o lOC^o s o;j 0 ^o *j L> .O 01 C. Sd o 3 vOS ovU.OO .V_ c<*1 i Ui d;*Cx A J Ox t/1 v t o n c o u i c t o r e w r t r a s : ; s t o s w i t h o u t G e v i l o o s e n i f d u st co n c e n tra tio n s were kenl below a Dean g an o r a j.i y a c c o o v o ;Ox /vCi not s c e s t o s i s i f he i s exposed to no more th a n 0 n l _ l i c r per cubic foot of a i r , even i f th is exposure ccn- a i s e n t i r e w o rk in g l i f e t i m e . A lth o u g h no ca; 3 a re known to have o c c u rre d when e x p o su res have ita in e a a t or oelov/ t n r s im it w ~ - i.s ~ , /d iu c .1 n-.rv'i i . - -- '-' } a e v e l , ^n o /.Ct.iii p v n r c n t h e U. S . A . ) h a s sets r*. *~ .i X V >- * * h 0 0 r over ^ i x c i 1T.Y f o r a s b e s t o s to c le s per cubic f oot in an e f f o r t to in c r o r in .c o r p o r a te s i n t h e l i m i t . The U. S. at of Labor has already issued a re g u la tio n under i-H ealy Act p la c in g th e TLV fo r a sb e sto s a t 2 -a rtic le s per cubic foot for public co n tra cts in ay have J u r is d ic t io n . This c o n c e n tra tio n of dust a l l y no t v i s i b l e in th e averag e work a re a u n le s s a UCC 020787 b . c_- b v.. v..-. - ^ c ; . . l. - c v v ; - j i i vjt. ..Vb ... 0 0 L> VCyX y ,, j_ c; j- ^ c l _o n '-nnnt: rcrr. o - i u rtxxxxon p a r t i c l e s a once i t v i s i b l e in *0 - -h . i t . 1 0 0 > ^X v iC in .-: vy> : *w <-> C . d ' ' V *5" '.- V SC\ `-^1 ' 1. T , T ' - ; i ' 1C 1 sy Vy... C l a. \ 1 y v CL o *--. c~: * cancerous turners, e s p e c ia lly --b . .U - . ^ p ^ 2 CL h / C3 V X *w. ^ h* / * -^. 1 asbestoses. R ecently.there > boon r e p o r t s o f sonie c a n c e r s c c c u r n n g , ._n _l...^_vx g.^ca,_is _.c ov^. y3 u 0 v S wu5 0.0 C_j O u x. n- o1 ha ve n o t d e v e l o p e d c l i n i c .'.'w ' Jv' Xo b tO iCV U'u v iiiOk>_/ city-lynor i oi c >ynci ^ ^ s 0 Oa VO 0 0 0:0 OoSOCiOOOC v d_." ^ -U_,, _ - J Cf * 0 1 - - -- W O iOO-L I a. Xri JUii- - ^n e x 3oov.ros \S7ClU. L*.0..1 v s iI j. xc an i>x y nos o s e n n o t e s t*o t a v* 0 o 3 uOS ) c s u r e i n r e c e n t y e a r s . ?hec v h i i a r a t h e r few in nurtber to cate., nay occur m 1:^.0 v/xvn m s oOo ios o _ onxy 3^xa>n^ e x o c s u r <13^ ci...o. h as twenty to fo rty ; d kJ - -Ud - -- ' _1Cl L/ vl b*. vVj_ O- i.*0 b 0 y . . C i . X ly : .a-. S , c a r d e r , there is ~ ruenxly -or. one d a t a a v a i l a b l e i t . r s t h a t t h e TLV o f 5 :t?p; rst ares c t h e 1 ioraa, a r c i t : ^ i:Oo _lOat 0noU.ti-i uC t r O wdC 1 ouxte ooss ib le that 2 b??i ;t , e i t h e r . R e sea rch on ' Control of asbestos dust rxc oi i s or. o re s o r e n e c e s s a r y , ;u: ; rrocs are /and a rd o n e s a p p l i c a o i . e 00 custy oprtio: include closed flo w systems,, UCC 020788 UCC 020789 c oa ^o O ' C C C V. 0 \j o \ O V o . - j C. C i 0* iraca O U i. j/ / r- o: a::y .G I. U. ci 0 G S3.J. 0 J vaaacine yc par c ~ia'a^ a r la s Coroora' -ion UCC 020790