Document B5NdZqjz27pVXEeYa812dRbr4

MAGNITUDE U? I.EAD BXPOotJRIS IN MARIcN, INDIANA PLANT OP ANACONDA WIRE AND CABLE COMPANY Ai r sam ples were taken In th e Immediate v i c i n i t y o f a m e ltin g po t In h io h s crap le ad from c a b le s as b e in g m e lte d* D e ta ile d o b s e rva tio n s e re made over a pe rio d o f an ho ur and a h a lf In order to n o te the o o n dltlo n a hioh e re moet fa vo ra b le fo r tide d i s t r i b u t i o n o f p a r t i c u la t e le a d oompounds in the atm os* phe re . I t so happened th a t th e end o f one s h i f t and th e be gin n in g o f an o th e r cams du rin g th e s e o b s e rva tio n s . This p e rio d in vo lve d th e rem oval o f dro s s from th e m e ltin g p o t , an o p e ra tio n h lo h o ccurs onoe per d a y, and which In vo lve s much g r e a te r d is s e m in atio n o f dust than th at a s s o cia te d *l t h any o the r procedure . Air samples were token from s e v e r a l p o in ts about the p o t, a t th e h e ig h t o f th e o p e r a to r ^ f a c e , du rin g the pe rio d o f normal o p e ra tio n . These samples e re com posited in to Sample 1 . Another a e r i e s o f sam ples , s im ila r ly combined as Sample 2 were o btain e d durin g the f i l l i n g o f the p o t and d u rin g the rem oval o f the d r o s s . The a n a lys i s o f th e s e sam ples yie ld e d the fo llo w in g r e s u l t s * Sample #1 .2 1,^ 4 0 .0 m l. co n tain e d 0 .0 0 2 mg/ Fb e q u iva le n t t o 0 .0 9 rag. per cu . m e te r. Sample 2 1,6 3 5 .0 m l. co n tain e d 0 .0 0 6 mg. Pb e q u iva le n t to 0 .28 mg. per cu . m e te r. The va lu e s fo r p a r t i c u la t e le ad in atmosphere are u s u a ll y e xpre s s e d in terms o f 10 cubio m aters o f a i r , and on th is bas is i t la cu rre n tly aocepted th at values in excess o f 5 m ill Igr2a por 10 c u b le m ate rs nre u n s afe * Tome e o rke ra g i v e Un fitly lo s e r valu e s lo some ln s ts n e e s as lo s - n 1**> m illigra m s par 10 c u b ic me to rs * The e vid e n ce * however* lo ve ry good in in dicatin g th at busto exposures as loe as th at involved in b re th ln g a i r c o n ta in in g 2 a l-li g r a m a o f lo ad per 10 cu ble m e te rs * e re s ub* s t a n tla lly s a fe fo r a ll workers re gard le s s o f e u s e e p tlb lli ty fa c to rs * On t h i s b a s i s o f com parison the va lu e s o bs e rve d in the v i o i n i t y o f th e po t may be re garde d as i n d i c a t i v e o f s a f e t y * In th at th e b a s ic le a d oonoe^fcratlon has appeared to be in the neighborhood o f 1 m i l l i g r a s per 10 c u b i c m e te rs * w h ile th e b r i e f p e rio d ic expoeure* during dro s s ln g end s h o ve lin g i s o f the order o f 2 *5 to 3*0 m illigra m s pe r 10 cu b ic m e te rs * Jiy e x p e rle n e e in Industry loads no to b e lie ve th at th is degree o f exposure does not indues s u ffic ie n t lead absorption to cause lead poisoning* Th is con c l us i on i s f u l l y v e r i f i e d by the re s t^ lta o btain e d In the e xam in atio n o f 2 em ployees whose work has In vo lve d d a i l y exposure to such lead as la re gu la rly d is trib u te d in to the atao s * phere around the p o t* N e ith e r o f the two workmen showed any c l t n i o a l eviden ce of o ccu patio n al le ad abso rptio n * n e ith e r had a le ad H u e * d e s p ite the pre se n ce o f co n d itio n s In the nouth (pyo rrho ea) uhioh are fa vo ra b le to th e deve lo pm e nt o f le ad d o p o s lts in th e gum t i s e u e * N e ith e r o f theta showed any blood changes (anemia or s t i p p l i n g ) s u g g e s tive o f le a d a b s o rp tio n * N e ith e r o f them had abnormal q u a n ti ti e s o f lo a d i n t h e i r blo o d and u rin e * I e rrlt u ye r had 0 .0 U mg* per l i t e r o f u rin e * and 0 *0 3 ^b pe r 10 0 grama o f whole blo o d* w h *'e John Difcs le r had 0*03 Tb per l i t e r o f u rin e and 0*033 a s * i*b pe r erama o f whole blo o d* These are q u i te w ith in th e lim i ts o f va lu e s found in p e r fe c tly normal persons w ith no o cc u p atio n al expo sure to le a d compounds* I co n clu d e , th e r e fo r e , from the co m bin e tlon o f th e s e d ata, th at the o ccu patio n al co n ditio n s stu died a t th is time are n o t such as to e n t a i l th e r i s k o f le a d p o is o n in g In workmen I t l e als o n y o pinio n th at tha co n ditio n s de scribed as in axiate n o e a t th e time o f th e p l a i n t i f f *e employment, w h ile pro bably in vo lvin g somewhat gre a te r e xpo s ure then th a t which o ccurs a t p re a a n t, were n o t s u f f i c i e n t l y d i f f e r e n t In type or magnitude to J u s t i f y an opinion th a t le a d po is o n in g would have r e s u lte d from th e e xpo s u re Good c l i n i c a l e vid e n c e would be re q u ire d , th e r e fo r e , to co n vin ce me th a t th e p l a i n t i f f had le a d p o is o n in g a t th e t i r e i t waa claim ed th a t he had By good o l l n i o a l e vide n ce I mean th a t c h a r a c to r i s ti e symptoms, a s s o c ia te d w ith le ad l i n e o f the gums, pe rh aps , and c e r t a i n l y w ith e xo e a alve numbers o f "s t i p p l e d 0 red blo o d c o r p u s c le s , s h o u ld have been pre s e n t The pre s e n ce o f ab normal q u a n titie s o f le n d in th e u rin e or blo o d or in bo th a t th a t t i 'O , would have been co n vin cin g, w h ile the lack o f such e vlde n oe Is a serious fa u lt in the p la in tiff*# o lain Returning to the s u b je c t o f "s t i p p le d " e r yth r o c yte s ( re d bloo d c o rp u s c le s } I t la n e ce s s ary to dem o n s trate th e pre s e n ce o f abnormal numbers b e fo re s i g n i fi c a n e # can be a ttu o bed to th e phenomenon "s t i p p l e d " e ryth ro c yte s o ccur in th e blo o d o f normal perso ns up t o ton o r more por f i f t y m icro s co p ic f i e l d s , and th e y arc found In in cre a s e d numbera In a wide v a r i e ty o f co n d itio n s which have nothing w hatever to do with le a d abao rptten Th e ir pre s e n ce , w ith o u t re fe re n ce to numbera, or without knowledge o f o th e r conoom ltant ohanges in th e blo o d, la wholly without diarnoofclo s ign ifica n ce Signed Ro be rt A. KKHQS In- ha 4a i'