Document k6v9pYGpdDrxadwjDVaaZozpn

Monsanto Monsanto Company 800 N. Lindbergh Boulevard St. Louis. Missouri 63166 Phone: (314) 694-1000 .ORGANIC CHEMICALS DMSION February 1, 1971 Dear Sir In February, 1970, we advised you of the newspaper and magazine articles indicating that polychlorinated biphenyls (PCBs) have been discovered at some points in some marine, aquatic and wildlife environments. It was claimed that the PCBs found strongly resembled chlorinated biphenyls containing 54% and 60%chlorine by weight. The quantities detected are said to be in the parts per million and parts per billion categories. Pydraul 312, Pydraul 135, Pydraul 230, Pydraul 540-A and Pydraul A-200 have been formulated with polychlorinated biphenyl. New formulations have been developed and tested to provide equal or superior performance. The new formulations will be designated Pydraul 312 A, Pydraul 135 A, Pydraul 230-A, Pydraul 540 B and Pydraul A-200-B. They are completely compatible with the old formulations and do not contain polychlorinated biphenyls'. During the next 60 days, as inventory is depleted in warehouses around the country, the new formulations will be shipped to fill your orders. If we can be of further assistance or answer any questions you might have please contact your local representative or me in St. Louis. Very truly yours C. L. Bradford Product Manager lb oob*1'''0 TOWOLDMONOQ55923