Document GKbgzZ67dKw2k5ev30DBwnYNV

cc: C. L. Bradford P. L. Slayton - 1650 October 21, 1971 Mr. Fred Qcchlogrosso National Lead Company Nuclear Division 1130 Central Avenue Albany, New York 1220fj Dear Mr. Occhiogroaao! This letter confirms our telephone conversation concerning the use of Santovac 2 is & replacement for Nolvac A. As indicated on their labels, Santovac 1 and Santovac 2 contain polychlorinated biphenyls (PCBs) of various types. As you are aware, PCBs have increasingly come under the scrutiny of various governmental agencies and scientific laboratories. In some studies, certain PCBs have been found to be persistent, an environmental contaminant and possibly injurious to certain forms of bird, aquatic and animal life. Accordingly, it is important that PCBs be kept out of the food chain. We want to remind your firm of the extreme care that must be taken by users of Santovac 1 and Santovac 2 fluids to prevent any entry into the environment through spills, leakage, use. disposal, vaporisation or otherwise. Some specific applications where these fluids should definitely not be used are in vaouum systems involving food or foodrelated products, animal feeds, pharmaceutical products, packaging materials Involving any of such items and buildings where any of these items are manufactured or stored. If your vacuum system Involves any of the mentioned applications, or if your system is such that entry into the environment cannot be prevented, you should replace Santovac 1 and 2 with non-PCB fluids immediately. Please contact your pump supplier for his recommended replacement product. DSW 017872 STLCOPCB4004417 Mr. Fred Occhlogroaso October 21, 1971 Page Two Used Santovac 1 and 2 should be returned to Monsanto Company, V. 0. Krummrlch Plant, SiUget, Illinois 62201, Attentions Supervisor Dept. 246 for proper disposal. This service is performed at cost, which la *0.03 per pound. In order that Monsanto may supply you with Santovac 2. it is necessary that we know your method of disposal of the used fluid. This is for our own information in determining approval for future use. Very truly yours. /pep R. E. Hatton Technical Manager Hydraulics and Lubricants DSW 017873 STLCOPCB4004418