Document 8538aL3RRqxpe31ej3qR87rVo

MILWAUKEE S);MTINEL MILWAUKEE,'...oC. D. 160.011 MAY 7 1969 Chemist sanoc . By Quincy Dadisman peaks" at the point where production, a phenomonon of Sentinel Staff Writer DDT should have been indicat which scientists had been un Madison, Wis. - A chemist from the university of Wiscon sin Alumni Foundation labora tory told a hearing on a p o s a 1, to bah DDT Tuei how tests are made for tl^ pes ed on the graph. . Swedisb_and British scientj^drs about two~years ago traced the false peaks to PCB's, he said. PCB's is chem aware because they had con centrated their studies on tis effects on nerve tissues. tafford and Victor J. Yannactine, jr., the attorney for the^Citizens Natural Resource i ticide. ists' jargon for polychlorinated association and the Wisconsin! Francis B. Coon, th^chief chemist for the laborai used a strip of gas chromato graph tape to explain methods used in' analyzing a coho salm biphenyls. ' --PCB's are chemicat"compounds distantly related to DDT which are used as "plasti apter of the Izaak Walton league, the petitioners for the ban, engaged in several bitter exchanges over Lofroth's testi mony. . on from a creek in Michigan. cizers" in making tires, artifi Lofroth's trip to the United The Creek, fish, caught in "Bear a Lake Michigan tribu cial rubber and various other materials, including lipstick States was financed by the En vironmental Defense Fund (EDF), a conservation minded tary,- Sept, 14, 1968, was pro and cutting oil, which is used group of which Yannacone is a vided by the chemical firms extensively in machine shops member. But Robert Mc which oppose the proposed bar to the use of DDT, he said. to cool tool edges when cutting metals. ' Connell, an assistant attorney general and the state's public Coon was called by Willard intervenor, had called him as a S. Stafford, chief counsel for > Techniques Worked Out witness. the industry task force for Coon said techniques had Lofroth's' testimony general DDT of the National Arricul- been worked out for separat ly favored Yannacone's case tural Chemicals association. ing the indicators for DDT re and examiner Maurice van "False Peaks" Coon said that chemists using the gas chromatograph had long been puzzled about "false peaks" which showed on the line traced on the graph by the indicator pen. lated compounds and PCB's and showed how this was done in the sample coho salmon. He said it reduced the indication of DDT and one of its rela tives, DDD by about 70%. The indicator for DDE, the com pound into which much DDT is Susteren several times asked, "Whose witness is he?" Staf f o r d argued from that base that Yannacone's questioning of Lofroth should be restricted to the rules for direct examina tion rather than the broader limits allowed- in cross exami The instrument, used in ana changed in living animals, was nation. . ... . lyses for minute quantities of a particular chemical in a sam not affected by the PCB sepa ration, he said. Lofroth returned to Sweden Tuesday night. . ple, is sensitive enough in , Earlier, S.-Goran Lofroth, a some cases to read to one part Swedish scientist, said that in per billion in a sample, Coon h i s opinion "it is a shame" said. that no tests of the effects of But he, said some samples DDT in human mothers' milk containing DDT showed "false were not made in 1951 When it was first detected there. Now, he said, "we don't have any controls. The whole earth is a test tube." ' . Lofroth repeated his argu ment that there should be a-t moratorium on the use of DDT; until the changes it is known; to produce in laboratory ani-i mals are evaluated as to the, possible harm to human- beings. > . No Proof of Harm ] DSW 201017 He said that there was no positive proof that DDT was harmful but that there was proof that it causes these changes, particularly in induci n g changes ^jr^liver enzyme STLCOPCB4059081