Document Lgr1vg560N7ovYE7aeydd7Qm5

IJYNH/S8 3rd i'cmmbcr, 1967 Mr. A. ltioliaidoon, bliell Chenioala, '.Ounetall Laboratory, Slttingboumo, Kent. Pear I*r. }iiohardsonf 2 an .'.lad to acknowledge rooeipt oT your helpful letter of bnd November oonoeminr your experiment* on the posoiblc occurrenoe of polychlorinated biphenyls in marine bird* and their eggs, Nov t'uit it ece.'ia oortain that contamination by ohlorinatad bipiianyla la taking place va ora kaon to follow up and daternino juet how and whara tha contamination is taking plaoe, You said ovor the tolojiiune tliat you had evidanoo tc surest Uiat tlie leakage ooouxs in tl*o vullay of tlia lvivor Withan. and I am discretely following up tills load. Hovevor, before patting too deeply involvad Z fee1 I should enquire as to the nature of the ovldenoe. In it auoh aa to Oonatitute a very positive indiotnenfc, or does it ouggest that t)i oontent lo narcinaMy greator In that tuva than elnevhere.' TVr:e would dearly have on la>'i>oxrtant boai-ln,. on the iuva of earoh. 'il.ere is also the Muontion of vhetJier the cate rial detected by Jeneen is its origin in houndinuvlt. i.u, are tiiura uovcral oouroee of eonurination to be looeted? tlw> question of tits jKie.iible toxio effeote, we ure os deeply oonoomed in this particular ty;<e of aontuMiniitlon as your bou,.tuiy lo in innoctioi.joe, and as . ou any thoro ia alveyc the tondonoy for puulic hodiue to oictyy.crate the haMird :uid for voool uomueru of tho publio to ei-ur.te alar, and docMondoacy. .orhape vuu oould couaent on U.o relative abundance of (a) ineooticidoo (b) chlorinated iiphanyln and /.lve our view as to whether the oontort of (b) iu contributing such to t.tio usard. itoreonolly I believe that tho overall lie sard from the00 onlorlnatod materials iiaa beer grossly exaggerated, and that OSW 020348 STLCOPCB4008277 tho rormrkablo sanaitivity of the toat nothod* h*a oontributod In no atmll uieaaur* in oauoing olaru. Your# tinotmljr. I '-ould ^ou plooao not# our trudo nt. for polyo.loriziatod blphony' o la /UOCLOii. ` JVKH OSU 020349 STLCOPCB4008278