Document nmDdL3mjqbmVQngkz79111oEX

bcc: C. L. Bradford R. A. Garcia - 1010 October 1, 1971 Mr. 3* Cherry TRW Metals Division Minerva, Ohio 44537 Dear Mr. Chorryt Thia letter confirms your telecon with Mr. Moore on September 30, concerning TRW a uae of Santovac 2 vacuum pump fluid. As Indicated on their labels, Santovac 1 and Santovac 2 contain poly chlorinated biphenyls (PCBa) of various types. As you are aware, PCBa 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 lnjurlouo to certain forms of bird, aquatic and animal life. Accordingly, It Is Important that PCBa 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 antry 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 foodrelated products, animal feeds, pharmaceutical products, packaging materials Involving any of such Items and buildings whsre 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 antry into the environment cannot be pre vented, you should replace Santovac 1 and 2 with non-PCB fluids Immediately. Please contact your pump supplier for his recommended replacement product. Used Santovac 1 and 2 should be returned to Monsanto Company, V. a. Krumrarlch Plant, S&uget, Illinois 62201, Attention! Supervisor Dept. 246 for proper disposal. This service is performed at cost, which is $0.03 pop pound. Very truly yours, DSW 017929 R. E. Hatton Technical Manager 1 m Ai T/tthr*1 r*mn+.m STLCOPCB4004474