Document zdo32JmDqR6kMwa6o1ML79eLn

^ Monsanto t HV/ . MOM IN.Ml 4 iOCATlOHI R . Rictl&rd Research Center i TO May 13, 1969 AROCLOR - ANALYSIS IN PESTICIDE RESUMES'---------------------- !------------- (Visit to Prof. 0. Wldmark U. of Stockholm - May 5, 1969) File . S, R. Keller A-Lab "E. Wheeler EWHEE E. Tucker Res. : H. Bergen- HBERd D. Olson W. Kuhn DOLSO WKUHN R. Kountz RKOUN R. Davis RDAVI P. Benignus/J. BryantpBENI J. Fallon JFALL Q. Thompson QPHOM R. Weiss RWEIS L. Stark LSTAR J, Sprlngate JSPRI Farrar Res. 1 W, Waychoff WWAYC C. Paton' CPATO R. Baxter - RUABON ' Wldmark was finding . . Cls and Cle chlorinated biphenyls from extraction of salmon and from extraction of waste sewage sludge. ^ k r;.V Ibw t&V and Cle chlorinated biphenyl .Some Clio - ........ ' '.- . No Cl*x and Cl*a , " " I..-.-W^epcldolmsloacgrkoisrrhtesasspisoenxdaemsxainrmoeuidngin2hg0ly0t0htseoarm<Cslepoalpehaseronfruon5md0 Sothrceo.ABtlraaonltcidclo.,*rST1e8yh5e4.i,r rAen.southltesr .agrreouap-o"f ' tit disiofmfeerresnftouancdcoirndinngattuoreW*alrdemanrokt'sthkneowsalmedegrea. tios avs in eitherrAroolor N W18ld5m^ aorkr Chalodphbeenen50in. co. n, vta*.ct V"wi-th....tr' ansformer manufacturers in Swede. n. *" They reported very low loss of chlorinated biphenyls, an occasional j*pill. ; Wldmark kept hitting at marine paints as' a source of ,the product. ' ' He wanted Monsanto to restrict sale to those closed system applications. , Hs asked if the economic value of PCB's was worth the bad publicity which would come to Monsanto. _ We countered with a question. What products would he recommend as sub` stitutes? What kinds of synthetic compounds are biologically acceptable? Would he help establish a safe tolerance level of synthetic compounds in wild-life? HONS 098104 He reported that he had not Isolated or found much chlorinated biphenyl with 1 through 4 Cl atoms. This might be because Aroclor 1242 and below ,1s more biodegradable; (or It could be due to the analytical Isolation and separation methods; or perhaps Aroclor 1242 is less exposed In the world.; Wldmark Is dedicated to better and more accurate analysis. He is In sympathy with most of the ecologists demanding elimination of chlorinated pesticides. H1b knowledge of scientific evidence and its requirements makes him slightly hesitant In condemning Aroclor itself or demanding Its total eclipse. Keller and Wheeler should have a more complete report. Wldmark reported not finding chlorinated naphthalene, chlorinated paraffin, chlorinated benzene, chlorinated terphenyl. He thought he had Identified and accounted for 80# or more of the lipid soluble extractable chlorine containing compounds. Based:on these remarks of Wldmark we might consider alternate products and actions. "- What 1b the Cls and Cle content of Aroclor 1242? ._ The Aroclor 1242 has 31S* dlchloro, ' 5trlchloro . ' . 16% ;tetrachloro . - ' .The Cls ^content must be very ..low In our present material. If--* Aroclor 1242 Is Indeed biodegradable we might restrict UBage " to minimize and control Its ^concentration In nature to acceptable ' levels. ,, ' ' - . However, the use of -Aroclor 1248, 1254 and 1260 would seem to . require further restrictions in exposed Bystems. " Scott Tucker reported that Aroclor 1242 could be .destroyed by HNOs/HaSOs treatment. Wldmark may or may not have-been destroying . Aroolor 1242 before his analysis. : ' We could also expect that Clstf might go undetected based on. ' . Wldmark's evidence; and apparently chlorinated paraffin and chlorinated terphenyl have so far escaped detection or are ab sent In the tissues of birds or fish. Again, Keller and Wheeler should have a more complete report. mo . W. R. Richard rfVfWttiiiife v'nit MOMS 098105 "%ie 1 Aroclor - Biodegradation RUABON VISIT I talked with R. Baxter, J, H. Malnprlze and R. A. Lldgett at Ruabon. They had reviewed the literature and had received ',samples of Aroclor from St. Louis, isomers 24', 44 22'4'4' and Aroclor 1242, 1254, and 1260. We asked that they examine these for microbiological degradation. R. A.' Lldgett said he would have to .develop an analytical method. I would hope that collaboration with Scott Tucker on-method or on actual sample analysis could speed this up. We would like some Indication of blodegradablllty, especially on Aroclor" 1242. W. R. Richard T 'tV . .f,.) *QNS 098106