Document yr9wvaO7r8oxgEK5xYZJkbE23

co: C. l. Bradford R. A. Garcia - 1010 October 7, 1971 Mr. Ted Proffer Welsh Industries 6556 South Oak Road Vassar, Mlohlgan 48768 Dear Mr. Proffers This letter conflrma your teleeon with Mr. Moore on October 6 con cerning your firm's use of Santovao 2 vacuum pump fluid. Ae Indicated on their labels, Santovao 1 and Santovao 2 contain polychlorinated biphenyls (PCBs) of various types. As you are aware, PCBa have Increasingly come under the scrutiny of various governmental agenoles and selentlflo 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 Santovao 1 and Santovao 2 fluids to prevent any entry Into the environment through spills, leakage, use, disposal, vaporization or otherwise. Some speolflo applications where these fluids should definitely not be used are In vacuum systems Involving food or food-related products, animal feeds, pharma ceutical 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 can not be prevented, you should replace Santovao 1 and 2 with nonPCB fluids Immediately. Please oontaot your pump supplier for his recommended replacement produot. Used Santovao 1 and 2 should be returned to Monsanto Company, W. 0. Krummrlch Plant, Sauget, Illinois 62201, Attentions Supervisor Dept. 246 for proper disposal. This service Is per formed at oost, which Is |0.03 per pound. Very truly yours. /DOD R. B. Hatton Teohnlcal Manager Hydraulics and Lubrloants MONS 094130