Document 7M1kxozQ5dgnmZ1xgV8XxkGQ6

cc: C. L. Bradford' P. L. Slayton - 1650 October 21, 1971 Mr. Fred OcchiogrosBo National Lead Company Nuclear Division 1130 Central Avenue Albany, New York 12205 Dear Mr. Occhlogrossoj ' This letter confirms our telephone conversation concerning the use of Santovac 2 as a replacement for Molvac A. Aa Indicated on their labels, Santovac 1 and Santovac 2 ,, contain polychlorinated biphenyls (PCBs) of various types. Aa 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 la 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, vaporization or otherwise. Some specific applications where these fluids should definitely not be used are In vacuum systems involving food or food* related 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 018104 STLCOPCB4004649 r Mr. Fred Occhiogroeao October 21, 1971 Page Two , Used Santovao 1 and 2 should be returned to Monsanto Company, W. 0. Krummrich Plant, Sauget, Illinois 62201, Attention* Supervisor Dept. 246 for proper disposal. This service 1b performed at cost, which is |0.03 per pound. In order that Monsanto may supply you with Santovac 2, it la necessary that we Icnow 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 OSW 018105 STLCOPCB4004650