Document 5bK77Kz80obEgwZwjEvVLG6vN

cc: C. L. Bradford P. L. Slayton - 1650 October 12, 1971 Mrt Lfla-E-- Calvin 1____ ci~'~Varlan Vacuum Division^-'-' NHC~Oparattan-.......... 160 Charlemont Newton, Massachusetts 02161 Dear Mr. Calvinli Thla letter confirms a telecon between Mr. Moore of Monsanto and Miss Eleanor Olbson of Varlan Vacuum Division on October 11 con cerning Varlan's use of 3antovac 2 vacuum pump fluid. As Indicated on their labels, Santovao 1 and Santovao 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 fourid to be persistent, an environmental contaminant and possibly Injurious to certain forma 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 U3ed 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 manu factured or stored. If your vacuum system involves any of the mentioned applications, or if your system is such that entry Into the environment can not be prevented, you should replace Santovac 1 and 2 with nonPCB fluids immediately. Please contact your pump supplier for his recommended replacement product. 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 is per formed at cost, which is $0.03 per pound. Very truly yours. DSW 018181 R. E. Hatton Technical Manager anfl T.11VnM nart* a STLCOPCB4004726