Document Xzy6Kyz7Oqy6v2zaXB7DL45Bx

FILE NAME: Sherwin Williams (SW) DATE: 1973 Mar 12 DOC#: SW006 DOCUMENT DESCRIPTION: Internal Report - Asbestos Exposu During Preparation of Joint Cement with Cover Letter rl LIBERTY m utual P.O. Box 19623,3200 Maple Avenue, Dallas, Texas 7S219 TeL (214) Riverside 1-S081 March 12, 1973 Hr, &, D, Mcliflrty, Plant Manager The Shervin-Willlaas Company 2802 M iller Road Garland, H Dear Mr, McLartyi Attached ie a re jJo rt recently completed by Mr, Floyd Penney, our In d u strial Rygienist, on the Bloc Tex operation, i . Hr, Penney* a report-deals only with the asbestos expomire to the aiployae mixing the basic ingredients o f Bloc Tax on tha th ird n o o r. is you can see from h is rep o rt, additional controls would a " o T S S ^ S t f 0'51'3 contlnue M la s ab0"to s * <* S1i 1i a1l s 3180 used ** **" * I bavo asked th a t Mr. Penney schedule a survey soaetims in tha near future to measure th is ex- Sincerely, Ken Brock lo ss Prevention Department KB/vl oci Mr. B ill Jenkins, Personnel D irector ' Mr. L. J . Kachelein, Director o f Corporate Safety Mr. J . R. Skinnar, Corporate Director of Insurance ) LIBERTY M UTUAL INSURANCE COMPANY IISCRIY MUTUAL FIRE INSURANCE COMPANY - HOME OFFICES: BOSTON . EQUAL OPPORTUNITY EMPLOYERS LIBEP.TY LIFE ASSURANCE C O m p n n y q r 5, DC 000470 1 SHERWIN-WILLIAMS COMPANY GARLAND, TEXAS ASBESTOS ZXPC3L7L5 : during PREPARATION OF JCILT CEMENT DC 000469  '-irj aHERWiN-VTLLTAMS jARL/J;o . T'rjCA? EST71_I>'?037RZ d-.rlr.s"ICjv jf _v; -,j ' r;MFNT C" * ')7r . sir s-;t:Cj w.-.- ej j sr.eiT. r::> jin.-. cRen* cd^lrd :_> ;;:t- M i,r..o ijtes.;0) m e BOo; nicerj?.a cczi:..r;.. or' t,.*, -53,; . a 'a t :r. of for concentrations COKflVc 7'.'7 Center:*-rations of as':<6o Co lx. liic C.'r :tm ii.g ;.c;.e o f tr.e b a t: problem i f fne exDosu re were :-o.v.i./::.7 i'-T^wg t; fe an; ccncsr.~r atio n , which occurs d.;rii.g tr-. d u ro i..j o - p r e s t o s , tould during f arse i r - `r.e e;.` i r t in g re d ie n t dunce:: --6dtC m due to a t e f ..1.1CaL t r Ofcl-.l : e in era- icr. Judgi. ** vnich we;re found d u n ,;g me ncur m i i . Mlf/CTfea of iamoli;,:? Sr C i t is ct-.tcua th a t t,-.: o '.c rj i-rr. o s:! i;.g _imit t ouid be exceeded were a i l added at oi.e time y Ti.-.g 0 pcs SIC 11; ty tr.at t:.io p a rric V.1;t r r - ? i- - t -?s re was disc o sio .' t uo' 11J *00:. re asj.- vilTOU ifor would be a re-term maximum .:f be determined l time to add the r.s concentrations 7 observation, : tne asbestos regarding the asbestos. Seme c f ir.e ta lc s vfclf r. were a : idee :: q u a n titie a of asbestos ir*` ;riad'i.\. evaiuated i s to be u se j fox1 i t : Z t *r-. *. according to p re se n t i .fiorr.-i'n o ii : 0 r.a-- cien fo'j xid 1.0 CO, .r. ai.ee cer o lan '. uce-re s'icr. ^1 tr.e r.ore:.Ti :u m tarda a t oc tain significant ta lc s nave been ter p lan ts. DC 000471 RECOMMENDATIONS ' As long as a sb esto s is in Bloc T , approved r e s p ira to ry p r o te c tio n should oe worn. N uisance-type dust re s D ira to rs are n o t s u ita b le . 2 ` IfcS 5Xh,U5t Ver' a l a " " be p e rio d ic a lly cleaned o u t. t0 "" " " > -- r is attached should A spot check shoved tn at one exhaust duct ' opening a t the second flo o r c a re r (below the Bloc Ter clogged a ua; haavily he ex.,au3t v e n tila tio n system has some poor design fe a tu re s : a- Seme branch d u cts e n te r the main a t a 90 an g le. The angle should be about 30o, and never over 5. b, Branches should e n te r the main a t gradual expansions, n t h one inch change in diam eter to every fiv e inches . in length of the expansion- e. See attach ed drawings f o r p ro p er duct design. . The s e l l hoods yhere appty bags a re stacked should be in c re a se d in height because the bag, are stacked about twice the height of the p resen t ekh.ustventilated enclosures Whenever s p illa g e o f in g re d ie n ts (e s p e c ia lly a sb esto s) o c c u rs, i t should be cleaned up before someone can wa!k in i t and cause d is p e rs io n in to the atmospheres -3 - DC 000472 <) DISCUSSION P o te n tia l Health Hazara* o f A s h p i t . . inhalation of asbestos dust f .bers cm a3best<jais> se rio u s and P o te n tia lly d is a b lin g co n d itio n vhieh a f f e c ts th e 1 ,,,,6S. o ,t ,, e f f e c ts o f a se rio u s n a tu re have come to lig h t in re c e n t y e a rs . e current lim it fo r asoestoe perm its exposure to average d a ily concentrations Of f iv e f ib e r s p er m i l l i l i t e r o f a i r and a c e ilin g c o n c en tra tio n o f ten fib e rs Per m il li li t e r fo r fifte e n Bi,,u te periods, not to exceed fiv e such periods per d*y. Only f ib e r s g re a t,.- t h r i v e m icron, (approxim ately 1/1,000 of an inch) are counted during ^ te rm in a tio n of the concentrations. Tt has bean estimatad th a t f o r each f ib a r g ra a te r than fiv a microns one can assume approxim ately 100 fib e rs of sm aller a i t , . In 19 7 6 , th e d a lly average c o n cen tratio n v iH ba reduced to too fib e r, per m il li li t e r , the interim Period intended to g iv . in cu stry time to provide engineering co n tro ls uhich iU achieve the future limi t , Controls ' Adequate v e n tila tio j is necessary to c o n tro l the dust from the o p e ra tio n , a t each the m ixers. Observation in d icated th a t control vaa n o t-s u ffic ie n t a t the mixer Udere BXoc Tex . being made. Tb, a . t i r e v e n tila tio n ayatam should be careiU U y checked to determine adequacy o f a i r H o c r a t .s to provide t b . necessary duet capture e ffic ie n c y . The system should bo checked p e r i o d i c a l , f o r .uch conditions M d" Ct " Par"U 0" ' on t h . t o blades, ) DC 000473 r e s t r i c ti o n s in the c ro 5S- Se c tio n a l a re a due to damage by fo rk tru c k s (se v e ral auch lo catio n s observed), e tc . good duct design. The attached drawings show p rin c ip le s of Besides the ex h .u st ducts to the mixer covers, th ere are brasches to small hoods where e .p ty bege a re p laced and fla tte n e d . Becau.e the beg, atach.d n e a rly twice the h eieh t o f th e hood, much dual i a forced in to the a i r . Thia tan be co rrected b , in c re a s in g the s i t e of the hood o r by removing, the bags from the hood when i t i s f i l l e d . The o p e ra to r of the Bloc Tex m ixer va5 not wearing a r e s p i r a t o r , although*he was exposed t= c o n sid erab le d u s t. C onsidering th a t one 'b rea th es about one m illio n m i l l i l i t e r s o f a i r p e r hour, th e a i r sampling in d ic a te d t h a t he would be exposed t= estim ated 7,300,000 fib e rs per hour ( fib e rs g re a te r than fiv e microns ir. len g th ) and about 100 tin e s t h is number when considering ' s h o rte r f ib e r s , i t i s th e re fo re necessary f o r every employee who i s exposed to asbestos tc wear a r e s p i r a t o r approved by the U.S. B ureau.of Mines fo r pneumoconiosis-producing d u sts. FLP.-jl February 22, ` 973 Floyd ; Penney - - 'V ' Senior In d u stria l Hygienist 1 -5- DC 000474 Method of Sampling: Method of A nalysis: AIR SAMPLING DATA C ollected on m illip o re membrane type kk l i t e r s per minute sampling ra te . By phase--c o n tra st microscope. Sample Number 2 3 Location ' 3.Z. (breath in g zone)of man during 80 m inutes o f batch prep aratio n o f Bloc Tex. * Sampler was worn or man. B.Z'. beside man (hand held sampler) during same peridd. . At desk about 10 f e e t from mixer. papers i t tU O Fibers per M illilite r (g reater then five m ic ro n s * ________ - , . - . . '-5 r e n te r than n*veMicrons*?1 ^ o r ^ i e h t T asbf s .t s is fiv e f ib e r s p e r m i l l i l i t e - ( fil -Ibers per ave^ e - A c e ilin g lim it of*ten times per day. The fiv e f f r I t f nuV erlo d s' not to exceed f i? e in 1976. I - er lim it u lU bG reduce= to two f ib e r s p er m i l l i l U e r tUJ C, -6- DC 000475 o-:c rS'DL'STRIAL VENTILATION I I g: k| frc r e g: ; 8 e? DC 000476 j 3 DESIGN PftOCEDUIE ,(j- J I icm tJa jjj, ob cm h 6 DC 000477