Document npp5JrDDrzrR46bE65BnO9Xom

be: Mr. H. S. Bergen Mr. T. C. Ford Dr. W. R. Richard Mr. E. P. Wheeler June 20, 1969 Mr. Robert A. Hewing Booth Newspapers Inc. SIS National Press Building Washington, D.C. 20004 Dear Mr. Moving: Your latter seeking further Information about PCB has been reealved and In tha absence of Mr. Ford, who Is on vacation, I am replying. We agree there la a possibility that same researchers may not know the difference between DOT and PCB. However, Professor Gunner Wlfeark end Boren Jensen have reported techniques that do differentiate between the two. Regarding the uaa of PCB In tlrea, the statement we sent you Indicates that "To our knowledge, PCB is not used in tires, house paint, household products, epoxy resins ox major vinyl plastics, as has been aharged." PCB Is used In certain types of marina paints. Tha water laaohablllty of these paints Is so low, however, that It seews Incredible to us that this would explain the source of PCB in the amounts that have allegedly appeared In water. 1 hope this additional Information Is satlsfaetogt Please don't hesitate to call on us If you need any further assistance. Sincerely, EVJ'.sfh Edward V. John Public Relations Manager Organic Chemicals Division MQNS 088339