Document O3r6jbzz7Db9rNm8zqr2R3D2K

: MILWAUKEE, WISC. ' ' D. 100,011 , j MAY 'B 1969 <f\ R ses Questioned af Madison He By QUINCY DADISMAN pounds closely related to DDT. Izaak Walton league, which chromatography, to determine . ' Sentinel Staff Writer DDD is a fraction of technical petitioned for'the ban, went the accuracy of the reports. i Madison, Wis. - The natural resource department's he*aring into a petition that it ban the use of DDT in the state Wednesday burned into an in quiry into the reliability of an (squirt gun) grade DDT and DDE is the material into which much DDT is changed when it passes through a living ani mal. DDE shows up on the gas deep into the procedures used by the WARF lqb. . Model Unknown Under Yannacone's ques tioning, Coon admitted that he He said that lab workers had been aware of the possibility for confusion posed byPCB's since they were identified in Sweden in 1967 and that the hydrolysis step had been avail alyses made by a Madison lab chromatograph tape as a sepa had not used a gas chromato able since last year, if needed. oratory. . rate "peak" in the line drawn by the machine, but th peaks On the witness stand nearly for DDD, DDT, and the PCB's the entire day was Francis B. are near each other. Coon, who heads the chemis try section of the Wisconsin Coon testified that it w a s Alumni Research Foundation usual practice to modify the (WARF) Institute, Inc., labora DDT by hydrolysis, or saponi tory. , . fication (making it into a soap) The WARF lab is interna so that it can be separated tionally famous among bio from the less soluble PCB's in chemists as the place where the gals chromatograph. they send samples for analysis DDE is the fraction of DDT as a doublecheck on their own which anti-DDT forces have work. . said upsets hormone balance in graph in more than a year, that he had done .only 100 of the 15,000 or so analyses made by the lab in the last few years and that he didn't know the model of the Machines used in the lab. He said that most of the work was done by others in the lab and that he checked the chromatograph tapes for accu racy, informing some clients that further testing should be done if there were indications that PCB's were present in the Steak Cut Coon said that a steak -- a cross section of the center of the fish -- had been cut from the 'coho salmon used in the test The steak did not include the f i s h's intestine and, he said, he was uncertain whether it included any back fat. Earlier testimony indicated that .DDT tended to concen trate in fatty tissues when eat en by animals. Coon had been placed on the some species of wild birds. sample. Throughout the exchange, stand Tuesday by Willard S. Victor J. Yannacone, jr,, at In about 1% of the samples hearing examiner Maurice van Stafford, counsel for the in torney for the Citizens Natural tested, Coon said, gas chroma Susteren was kept busy ref dustrial task force for DDT of Resource- association and the tography tests were Eechecked ereeing a series of objections the. N a t i o n a i Agricultural Wisconsin division of the by another process, thin layer by the two attorneys. . Chemicals association, which opposes the proposed ban. ii Analysis Brought Coon brought with him a gas chromatograph analysis of a coho salmon caught in a Lake Michigan tributary. He testified to a series of tests made with the instrument -- which detects differences in chemical compounds electroni cally and indicates the differ- e n c e s by a wavy line of a graph -- which showed that the salmon contained DDT and some of its chemical relatives, and PCBs, polychlorinated bi phenyls. ' Some analytical chemists say the presence of PCBs, chlorine compounds used in in dustry, make analyses for DDT difficult and have resulted in confusion in evaluating studies of biological samples taken from the environment.. Coon testified that the gas chromatograph tape indicated that the salmon contained DDT, DDD and DDE, as well as traces of PCBs. DDD and DDE are com A------------------------- DSW 200985 STLCOPCB4059049