Document X8xZDnYDMDjk9ozM3a782QVVw

*f Monsanto O 0 , . ><' R< g Keller - Technolosv..D-JUUULtnent - South SeennUtr .>> ATI i October 20, 1970 vuieT PURANS IN AROCLOR PRODUCTS at'CftlKCt - TO : V. 1. Papageorga General Office W. ft. Richard - CO Perrtr^iffr. 1 ft. S. Bergen - GO I. F. Wheeler - GO M. W. Dietrich - Res. 1. M. leery - Res, 2 E. S. Tucker - Res. 2 ft. ft. Munch - ftee. 2 J. F. Hiiuu - ftea. 2 The attached report by Dr. Mleure shove that Aroclar T242, 12421, 1254 and 1260 eontaina no detectable polychlorinated dibenxofurana. Arodor 5442 contains detectable tetrachloro- dlbehsofuran at 1-3 ppa. Coapetltlve Frodelec Fbenoclor . DP6 eontaina considerably aor e dlbensofurana. On thla basis, the Aroclor 1200 series sent for feeding. ...... , studies at Bio-Test appear a free (<1-5 ppa) of fur an ;Cl- contdalnants which night biaa the results. Zt will be noted, however, that these products do contain varying aaounts of ' polychlorinated naphthalenes. Would toxicity results froe feeding etudlee be affected by these lapurltles? * * Polychlorinated anthracene or phenanthrone and tetrachloro- dlbensofuran lapurltles found In Aroclor 5442 probably explain why the Rational Water Quality Laboratory at Duluth, Minnesota finds that Aroclor 5442 la auch aora toxic to Daphnla than any of the FCB's. The report doesn't aentlon it, but no polyehlorodibenso-pdloxlns were found In any of the products. The detection Halt is an astlaated If5 ppa depending on the specific iapurlty and product Involved. db Attachaent Bub 0, ^ J4 . ft. K. Seller EXHIBIT r-7>?7 sfi'. 10 . > T"/ ~ ^ |u*4 4a ^ tv ^ . <UiUp . II MV ti aa#Xu -t* juJ: *-{r MAE 054132 WATER PCB-SD0000003878