Document Jyn6k3rBL6qBjKyqX6ZZDRv

1 }/ 1TV7QI/SS iir, A, Kioluuxition, bholl Chonicolu, Amu tail laboratory, bittingbourno, Kent* Jid hovenbor, 1967 Door hr. Jdoliaxdaon, I ju.i lad to aolmowlodi.e receipt of your liolpful letter of Pnd bovercber conoomin;, youi' oxj-eriraonts on tlie pouoible ocourrenos of polychlorinated biphenyls in morino birds and thoir c,;;;b, h'ow that it seoiu oertain tliat contamination by chlorinated Liphei-yla in Inking , J.:ves wo ore koon to follow up and dotomi.no juut how and where the contamination io tuhin; place. You ould ovor tic telephone tliat you had ovidenoo to oug;<..rjt tliat tlio leakage oocure in the valley of the hivor Vitliaa, and I ant diSvi'ctoly following up this lead. Hovevc-r, before dotting too hoojil.y involved feel I should onquire as to tlie nature of the evidence. In it suoh on to constitute a voxy pooitive indictnont, or doeo it nugreat that the content io Marginally fjro&tor in tliat aroo than elnewlierel Tli 1 s would dourly have an important i-Marin;-: on tho aiec. of search. 'Hu>ro ia uloo tliu -|uo::tii)n of who Liar tlie material de tootod by Jenoen )<aa its origin in .ioundinavio. i.u, aro there nowrol oourceo of contamination to be looated? tin the (juoutlon of tiio poo: ibis toxio effects, we are as deeply oonoemod in thin particular Ly;* >>f contamination aa your Uon.-ony io in insectioiuoo, i-.nil an you Buy there io always tho tendency for pul-lio bodioo to oxa, .orate tho lvaziml and for vocal uombera of tho publio to create filar , and dconondency. Porhapo you could oota-iont on tho relative abundance of (a) inaootioldeo (b) chlorianled l-ipJionyln and give yo- r view aa to whether tho content of (b; io contributing much to the uc.ird. horoonully I bolieve tliat tho uvor&ll liamrd fi'oti thono ohlorinaiod materials has beer -grossly oxaggo rated, and tijvt OSW 018419 TOWOLDMONOQ54632 o -2- o the remarkable sensitivity of the tost inothods has contributed in r.o neaeure in oauein# al&xuu Your sineerely. Would you pleaso note our trade name for j*>ly chlorinated biphenyle ia AROCLOH. i/WOI DSW 018420 TOWOLDMONOQ54633