Document 108xa3039Kmj11RzqGzYaej95

M on saflto U o3, n p ! s igrr ,a a kO lM IO H . G. J . HeEvan - N3A - M j n z . iuutc > ( '( I - l TO A p ril 13, 1977 FILE cc: J . C. M cPhillips-B 3SD j. s. MKtaif-Banr - M. E. M iller-B 3S B R. H. M iller-B 3SB R. G. P o tter-B 3 S B F. A. Provomy-B2SC D. P . Roman-N2B R. A. Stohr-B2SA P . A. Tiem ey-N 3A E. F. W ilcauskas-B3SC Summary o-*l\e H e a rin g s a t M ichigan D epartm ent o f A g r ic u lt u r e , A p ril 1 2 , 1977, re g a rd iM D o w C hem ical's re q u e s t fo r l i f t i n g th e su sp e n sio n on Dowicide EC-7 ( p u r i f i e d PENTA)i n M ich ig an . The S ta te of M ichigan o rd ered a susp en sio n of p en tach lo ro p h en o l use on March 1 1 , 1977, and on M arch 2 8 , Dow r e q u e s te d a h e a r in g to l i f t th e s u s p e n s io n on t h e i r p ro d u c t, Dowicide EC-7. EC-7 i s a p u r i f i e d p en ta in which th e d io x in le v e l and presumably o th e r im p u ritie s have been reduced. D r. D onald R. I s l e i b c h a ir e d th e h e a r in g . At th e o u t s e t o f th e m eetin g D r. George W hiteheat, M ichigan Departm ent of A g ric u ltu re , presented a chronology of th e pro blems a s s o c ia te d w ith s e v e ra l h erd s of c a t t l e which le d up to th e ir im posing th e ban on p e n ta . T h is p r e s e n t a t i o n wa3 v e r y b r i e f and co u ld n o t be c o n s id e re d a s a vigorous defense o r ju s ti f ic a t io n fo r Imposing the ban. Dow th e n p re s e n te d t h e i r c a se on why th e ban sh o u ld be l i f t e d on EC-7 . Dow*3 argum ents were In fo u r c a te g o r ie s : T oxicology; A n a ly tic a l; Use Technology; and Economic Consequences. They had s e p a ra te w itn e sse s p re s e n t in each o f th e se fo u r a r e a s . T h is m ain argum ent was t h a t D owicide EC-7 d id n o t p r e s e n t an immi nent hazard in the S ta te of M ichigan. TOXICITY D r. P e rry J . G ehring, D ire c to r o f Dow's T o x ic o lo g ic a l L a b o ra to ry , d is c u s s e d d a ta on la b o ra to ry te s ts comparing th e to x ic ity of te c h n ic a l v ersu s p u rifie d p en ta, c o n c lu d in g t h a t a l e v e l o f 50 ppm maximum t o t a l d io x in s i n EC-7 ty p e m a te r ia l elim in ated any to x ic response in th e ir most s e n s itiv e la b o ra to ry te s ts - ra b b it ea rs and chick edema. Dr. Gehring then re la te d the observed e ffe c ts noted in the LeMunyon h e rd to known e f f e c t s o f d io x in s . T h is p a r t o f h i s p r e s e n ta tio n was s t r i c t l y second hand, most o btained from d iscu ssio n s w ith th e s ta te in v e s tig a tin g group who o b serv ed th e LeMunyon h e r d . The o v e r a l l t h r u s t o f t h i s p r e s e n ta tio n was th a t p en ta w ith m inim al le v e ls o f d io x in would e lim in a te the problem s observed in M ichigan cows. D r. G eh rin g a l s o rem arked t h a t th e LeMunyon s i t u a t i o n a p p ea red to be an u n u su al case in th a t th e re was ev id en ce o f an o ily f ilm exuding from the t r e a t e d wood and I n d ic a te d t h a t t h i s i s n o t ty p i c a l p e n ta t r e a t e d wood. R egarding th e 50 ppm l i m i t needed f o r no e f f e c t l e v e l s , he s t a t e d t h a t ab o u t 40 ppm was o c ta c h lo r o d io x in s , .9 ppm was h e x a , and th e b a la n c e was h e p ta and f u r a n s . I M . t o * '7J -U JTO9 7D *rP-- CONFIDENTIAL SUBJECT TO PROTECTIVE ORDER. 019324 2- - ANALYTICAL D r. Rudolph H. S t e h l , DowTs A n a ly tic a l D epartm ent, d is c u s s e d a n a l y t i c a l methods f o r EC-7. Dow u s e s GC f o r a n a ly s is o f c h lo ro p h e n o ls and LC f o r c h lo r in a te d d io x in s . Dow a n a ly z e d m ilk sam ples from th e s ix farm s whose m ilk had been q u aran tin ed and, although one sample appeared "su sp ic io u s", the n e t conclusion was t h a t th e y c o u ld n o t f i n d e i t h e r p e n ta to a d e te c ta b le l i m i t o f 5--10 ppb or dioxins to a d e te c tio n lim it o f 20-25 ppt in any o f the m ilk sam ples. D r. S te h l a l s o d is c u s s e d Dow's q u a l i t y c o n tr o l p ro c e d u re s f o r d io x in s in com m e rc ia l EC-7 and in d ic a te d th a t they o nly an aly ze fo r d io x in s and n o t f o r o th e r im p u ritie s , e . g ., f u r a n s . In answer to a q u estio n on which ch lo ro d io x ln isom ers Dow used a s s t a n d a r d s , D r. S te h l s t a t e d t h a t t h e i r GC/MS m ethod d e t e c t s a l l isom ers more o r l e s s e q u i v a le n t ly ; o f th e 10 p o s s ib le hexa is o m e rs , s i x ha'd g iv e n e q u iv a le n t re s p o n s e by t h i s m ethod. He a l s o s t a t e d t h a t th e y h ad b een u n ab le to f in d any te t r a c h l o r o d i o x i n s in any p e n ta , te c h n ic a l o r r e f i n e d , down to a le v e l .5 to 1 ppb. USE TECHNOLOGY D r. R o b ert L. J o h n so n , S e n io r R esearch S p e c i a l i s t f o r Dow, d is c u s s e d th e d if f e r e n c e betw een D owlclde 7 an d EC-7 . EC-7 I s e s s e n t i a l l y 100Z c h l o r i n a te d p h e n o ls , w hereas Dowicide 7 i s a b o u t 96Z. EC-7 has a h ig h e r t e t r a c h lo ro p h e n o l c o n te n t i n o rd e r to in su re s o lu b ility . Dr. Johnson discussed a lte rn a te s to p en ta; c reo so te s, and a r s e n i c a l s , i n d i c a t i n g th e d f ic ie n c e s o f each o f th e s e a l t e r n a t e s . He a l s o d i s cu ssed th e wood t r e a t i n g I n d u s try in g e n e ra l, m entioning t h a t i t was e s tim a te d t h a t wood t r e a t i n g sa v e d $5 B i l l i o n p e r y e a r and t h a t t r e a t e d wood would l a s t seven y e a r s o r m ore, com pared to two y e a rs o r l e s s f o r u n tr e a te d wood. He a ls o d is c u s s e d t h e i r a n a l y s i s o f wood from th e LeMunyon farm i n w hich th e y found 6 to 15 ppm o c t a c h lo r a d i o x in s , 6 to 7 ppm h e p ta c h lo r o d io x in s and 0.5Z p e n ta ; a l l based on th e w eig h t o f th e wood. On th e b a s is o f th e se d io x in c o n te n ts r e l a t i v e to th e p e n ta c o n te n t, D r. Johnson m a in ta in e d t h a t th e wood on th e LeMunyon farm c o u ld n o t have been tr e a te d w ith EC-7. D r. Johnson s t a t e d t h a t a lth o u g h Dow had a s p e c i f i c a t i o n o f 30 ppm maximum on o c ta -- ch lo ro d io x in s, th e ir pro d u ct a c tu a -ly was f a r lower th an th i s le v e l. Regarding th e s o lv e n ts u se d w ith p e n ta , D r. Johnson in d ic a te d t h a t Dow had .no knowledge o f the to x ic ity o f most o f th e so lv en ts which were h ig h b o ilin g petroleum p roducts con ta in in g s i g n i f i c a n t am ounts o f a ro m a tic s . He d id in d i c a t e t h a t Dow recommends th e use of m ethylene c h lo rid e as a so lv en t and th a t i t s to x ic ity is known; b u t th a t most wood t r e a t e r s u sed h ig h b o ilin g p etro leu m based s o l v e n t s . ECONOMIC CONSEQUENCES Mr. M arvin E . W ln q u is t, Dow's B u sin ess Manager f o r P e n ta , r e p o r te d t h a t Dow sto p p e d producing Dowicide 7 in December *75, and sin c e th a t tim e have only produced Dowicide EC-7. He s t a t e d t h a t an a d d i tio n a l s te p was needed to produce th e EC-7 m a te r ia l and t h a t t h i s added a p p ro x im a te ly 10 to 15Z to th e c o s t o f p e n ta . He a l s o s a id th a t very few people had been w illin g to pay e x tra fo r the p u rifie d p ro d u ct. Mr. W in q u ist rev iew ed th e h i s t o r y o f Dow's concerns ab o u t d io x in s s t a r t i n g in th e 1 9 6 0 's w ith th e p ro d u c t 2 ,4 ,5 - T . Dow's EC-7 p la n t has been on stream s in c e mid 1973 CONFIDENTIAL 5UEJECT TO PRCTir^Vt ORDCt . 0 0 7 0 ^ 7 1 'PCP- ' C19325 3- - He s t a t e d t h a t Dow had p re v io u s ly e x p re s s e d a w illin g n e s s to li c e n s e t h e i r te ch n o lo g y fo r producing th e p u rifie d penta to o th e r penta producers, but th a t none of the o th e r producers had in d ic a te d a d e s ire to lic e n s e . The o th e r p ro d u cers were m entioned as R eich h o ld , V u lcan and M onsanto. He e s tim a te d t h a t i t would p ro b a b ly ta k e o th e r p ro d u c e rs two.' to th r e e y e a r3 to come on stre a m w ith a p u r i f i e d p r o d u c t, once th e y d e c id e d to p ro d u ce such a m a te r ia l. He a l s o in d ic a te d t h a t Dow c o u ld su p p ly enough EC-7 f o r a l l o f th e M ichigan re q u ire m e n ts . Mr. James T racey , an A tto rn ey , re p re se n te d Reichhold and V ulcan fo r th e h e a rin g s. Both b e fo re and a f t e r th e h e a rin g , he contended i t was in a p p ro p ria te f o r th e S ta te to a c t on the p e titio n o f one producer, but th a t according to th e s ta tu e s under which th e S ta te suspended penta on an emergency b a s is , th ey were re q u ire d to hold a p u b lic h earin g to p resen t the reasons fo r imposing th e .b a n . The S ta te H earing O ffic e r h eld th e h e a rin g in any ev en t, but w ill probably re s o lv e th e q u e stio n o f th e S t a t e 's o b l i g a t i o n s to p r e s e n t th e case f o r th e s u s p e n s io n . He d id in d i c a t e to Mr. .Tracey t h a t he co u ld re q u e s t a j u d i c i a l review o f th e h e a r in g . The H earing O ffic e r concluded th e h e a rin g by s ta tin g th a t he would stu d y th e evidence p resen ted by Dow and make a recom m endation to th e S ta te D epartm ent o f A g r ic u ltu r e on w h eth er th e ban sh o u ld be l i f t e d f o r an EC-7 ty p e p ro d u c t. The h e a r in g l a s t e d from 1:0 0 P.M. to 3:40 P.M. GJM:nk