Document Moba3xGRVGO9bLjZvqR6LarY7

Monsanto sc Johnson M` ' August 6, 1975 *U,,J,C' ' U.S.Steel/PCB Test hi i cm nci i TO = 1010 P. D. Craska C. Paton G. F. Fague 1010 D. L. Mellon W4A L. R. Stark W. B. Papageorge Attached please find "Monsanto Methodology for Aroclor", indicating test methods for PCB determination. As recently discussed, U.S. Steel should observe these methods with caution, as they do not necessarily apply to phosphate ester chemistries. Please-'inform them that we are finalizing a method which dlre/rl^ applies to a chemi cal matrix. IN - 10 1/72 OObfe1**6 TOWOLDMONOQ56335