Document 0gym063RdrVD3dgb9Yxz39ojV

umi/ss Jill hovembur, 1927 Mr. A. liioliordson, iihell Clioniools, lime toll Laboratory, Sittingbcumo, Kant. Saar hr. ldoliaxdson, I an clod to acknowledge rocoipt of your helpful lotter of 2nd liovenber oonooming your experlmonta on tlie pooolbla oocurrenoe of i>olycliloricatcd biphenyls In marine birds and thoir eggs. liow that it aoena oertoin tliat oontsi.;ination by chlorinated biphenyls is taking place ve are koon to follow up and determine Just how a:id whore the contamination is taking place. You said ovor the telephone that you lied evidence to suggest that the leakace oooura in tlio valley of the liver V.'ithan, and I am discretely following up this lssd. however, before getting too deeply involvod 1 feel I should enquire as to the nature of the evldenoe. la it auoh as to constitute a very positive lndlotment, or does it suggest tliat tlie content ia marginally greater in tliat area than elsewhere'! Dili would clearly have on important bearing on tlio area of search. There le also tlie question of wlistlior the material deteoted by Jensen lias its origin in Soandinavia i.e. are there several sources of contamination to be located? On the question of the possible toxic effects, we are as deeply eonccmed in this particular type of contamination os your Company is in inseetieiuca, and as you soy tliore is always the tendency for public bodice to exaggerate the hazard and for vooal members of the publlo to create olarr. end despondency. Perhaps you oould comment on the relative abundanoe of (a) inaeetloldos (b) ohlorinatod biphenyls and give your view as to whether the oonter.t of (b) Is contributing much . to the hazard. Personally I believe that the overall hazard from theoo ohlorinatod material* lias beer grossly exaggerated, end that MUMS 090512 2 flat reoarkablo sensitivity of the test nethode has contributed in no scall csssurs in oausing alarm. Yours slnosroly, D.V.K. HA.IOT \.ould you pleaso note our trade m:.io for polychlorinated biphony:u ic A. .OCIDit. wia: HONS 090513