Document peY7L1NB7ZkVr1nyr40Ejrvkj

LONDON "Time." Dee. 17, 1970 Science Report Pollution: Sewage killing marine life The way in which several (on* of Ihe industrial chemicals polychlor inated biphenyl*. or PCVi are heit dumped caoh year in coastal water* round Britain ia outlined in report ir>m the Freshwater Fisheries laboratory, Pitlochry* Scotland. ' It provide* the pov-'Me explana* non ot how (hit tubtuoor has been iWr 'y accumulate uffnhnre in mnicirni quantities to harm marine lla. is earned bv boot to the estuary and dumpad ia deop water, six mile* south of Cianecti Head, hie of Bute. It appears that it it in thia pro* cam that ifuantitic* of biphenyls are betn dispersed in the sea. Prelim* inary estimate* nuggett thet about a too of PCBs is bmn dumped in the Clyde estuary mis way. Similar disposal operation* foe Manchester sod London usoioatt that similar quantidae are bain Anxiety about the spread of Pi. H has frown over the past two vc*re with ihe detection oi harm* rnl IcVttft in tea bird*, aeals and other marine life. Them chemtcaU have been conmbutorv earn* of the death >'( large population* of mine mldlilr ipccics. . PCBs are produced for a wide ' variety of induamal procomee. The imm hkeK- cause of their .spread seemed to he 'he discharge of fac* ' lory effluent into river* end thence, down to eetuanev But it ha* been difficult to reconcile Out meminply straightforward event with the find ing of biphenyl auhaunoM in car* tern cam* of wildlife death. The invcuiimtHia *t PiHoehry tuned from an analysis of manna fih und modutcs in BuottiA waters that showed the kigtot residue* of PC Of to be in samples. taken from the Wnfc of Clyde. Attempts wore mode to trase dir sours* of pelhliton hy <lam inin ihe vanooft waters dtachargvd inn* the river at miarvab atow the < hdr to the centre of Ouvgmi. No dctortatda amount* ttnind: nor were any appreviehie levefa vhown Mi an examination of the elHurni from the trunk mwera tarrying the KieHt of treated waMt *ln*harped from many hundreds .*f favtnnca. In Pm report Mr. A V. Holdm ifa*Bribes bow the mvaeUganon then dumped in dt# northern Mali fee tnd the Themes estuary. . hjr. Holden suppeM* shut soma PCBs may be cnlenni the tea directly in ire* where waste <( ditfuirjNsd offshore without treat* ment, and the disposal of sludge on taod v-ould lead to PCS rcsnlucs entering the terrestrial ecoaysum by transfer through food ohaine. By Pearce Wr%l*. Mtnce Csme poodan RdwTVeL St. Deev I* worts wh* HONS 033638