Document ppNV1nbDj3VgxGr2gZkgK0NJ6

fy ^ ' | Monsanto i &ar* * MrtNINCt i i TO . > R. Richard - Research Center May 13, 1969 " AROCLOR - ANALYSIS IN PESTICIDE KESIMEff : (Visit to Prof. 0. Widmark U. of Stockholm - May 5# 1969) Pile . , ' ,, p. Keller A-Lab `E. Wheeler EWHEE E. Tucker Res. 2 H. Bergenv . KBERQ D. Olson D0LS0 W. Kuhn R. Kountz R. Davis WKUHN RK0UN RDAVI ` P. Benlgnus/J. BryantpBENI J. Fallon JFALL Q, Thompson QTH0M R, Weiss L, Stark RWEIS LSTAR J,, Springate JSPRI parrar Res. 1 W, Waychoff WWAYC C. Paton CPAT0 R. Baxter - RUABON < Widmark was finding . . . . ' .. .. Cls and Cle chlorinated biphenyls from extraction of.salmon and ... . from extraction of waste .sewage sludge, . . jj.* ' ' " ' '"ig:.;; "' -ToW^V'-. and..Cl# ^chlorinated biphenyl. ' ^Booe -Clio . v. : VKo Cl*i Hand ciaa^:V.;M.' /; '' W:V, --' . / ' -" ' I'.r.^This-corresponds "roughly to ^Clophen .50 or Aroclor 1254. . . f^.^he isomers' found in nature ware. <not .the . same .ratios as in either rAroclor jf-^ias^jor Clophen 50... . .v.v.,V-. . . ... . /-"'Widmark'iias examined 2000 samples from the.Baltic^e#, - Another "group ^f i,,^oologiatB is examining the ea isrpund Scotland.'.'^rhelr>reaults are a r?''.V bit different according to .Widmark'.s knowledge; . - . _ . / ' . . ' . !..i'Widmark had been in contact-with transformer manufacturers.in Sweden/ !> ' They reported very low loss^of chlorinated biphenyls,,an occasional.Tspili, .. . Widmark kept hitting at marine paints as A Aour.ee of .the product*. .* ' He wanted Monsanto to restrict sale to those closed system applications. . ' He asked If the economic value of FOB'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? . HARTOLDMON0025184 He reported that he had not isolated or found much chlorinated biphenyl with 1 through 4 Cl atoms. This might be because Aroclor 12^2 and below is more biodegradable; (or it could be due to the analytical isolation and separation methods; or perhaps Aroclor.12^2 is less exposed in the world.) '. Widmark is dedicated to better and more accurate analysis. He is in sympathy with most of the eoologists demanding elimination of chlorinated pesticides. His knowledge of scientific evidence and.its requirements makes him Blightly hesitant in condemning Aroclor itself or demanding its total eclipse. Keller and Wheeler should have a more complete report. Widmark 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, ori these remarks of Widmark we might ^consider alternate products and actions. .. " ' What is the Cls and Cle content of Aroclor 1242? The Aroclor 1242 has diehloro, < . ' . .. 55^ trichloro ' ' -i']' ,tetraohloro ;;The Cls .content must be very ..low in our present material. If Aroclor 1242 is Indeed biodegradable we might restrict usage to minimize and ^control rits ^concentration in nature to acceptable , levels. . . However, the use of Aroclor 1248, 1254 and 1260 woyld seem to ' ..'require further .restrictions -in exposed systems. V-'Boott Tucker-reported-that "Aroclor 1242 could be .destroyed by . - 'HNOs/HeSO* treatment; Widmark may or may not have "been destroying . Aroclor 1242 before his analysis. ; '. .' ` We could also expect that Clatf might go'undetected based on. * . Widmark's-evidence; and apparently chlorinated paraffin and chlorinated terphenyl haveao far escaped ^detection or are ab- ..sent in the tissues of birds or fish, .v Again, Keller and Wheeler should have a more complete report. ms .. . W. R. Richard ... ., 009836 HARTOLDMONOQ25185 I Aroclor Biodegradation rRUABON VISIT I talked with R. Baxter, J, H. Malnprlze and R, A. Lldgett at Ruabon. They had reviewed the literature and had received sampleb 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,' Lidgett 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 biodegradability, especially on Aroclor'1242. BS ^;r': ; ' -* .* h'J- i` Vt l ' . . . t' V tv.'-'. W. R. Richard . .*** .* * .! >* , \i . -v>` . s.' VycV.V. X . k.. . ' . TRAN 009837 HARTOLDMON0025186