Document 3QGwbL8xzNvkmJd1v442mex6n

cc: C. L. Bradford P. L. Slayton - 1650 October 21, 1971 Hr. Fred Occhlogroaso National Lead Company Nuclear Division 1130 Central Avenue Albany, New York 12205 Dear Mr. Occhlogroaso: This letter confirms our telephone conversation concerning the use of Santovac 2 as a replacement for Molvac 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 PCBa 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 riulds should definitely not be used are In vaouun 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 hla recommended replacement product. HONS 092115 Mr. Fred Occhlogroaso October 21, 1971 Page Two Uaed Sentovac 1 end 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 nay supply you with Santovac 2. it la necessary that we know your method of disposal of the uaed fluid. This Is for our own Information in determining approval for future use. Very truly yours. /pap R. K. Hatton Technical Manager Hydraulics and lubricants HONS 09211b