Document 0gnoEON8wMJBo1KB2RXkgmGgx

bcc: T. L. 0 os sage/D. B. Roush R. A. Qareia - Akron - 1010 J. A. Heilala - Pittsburgh August 17, 1971 Mr. Howard Jarvis A loan Alualnua P.O. Box 912 FSiraount, Meat Vh. 26554 Dsar Mr. Jarvisi This will confirm your tslsphons oonvsrsation with our Mr. John Hsllala regarding conversion of your haat transfsr system from Thsrmlnol PH to Therwinol 55, Ms ars plsassd that you ars agrssabls to asking this change as quickly as possible. As lndleatsd In previous eorrsspondsnes dated June 8 1970 Theralnol FR is a polychlorinated biphenyl (PCB) and articles have been published indicating that PCBs have been discovered at sense points in the aarine, aquatic and wildlife environments. This eheaieal la a long-lasting, stable aaterial and its ultlaate effect in the envlronaent is not known. During the past year the FDA has posted guide lines of 5 pp in food products and 0.2 ppm In dairy products. Because alternate non-PCB heat transfer fluids are available we have taken aeesures to convert all Theralnol FR users where even the remotest possibility of food contamination exists to aaterials such as Theralnol 55 or Theralnol 66. In your oase we recomend Theralnol 55* You should drain the Theralnol FR froa your system as thoroughly as possible -- which weans removing essentially all of the FR fluid. You can then add the Theralnol 55 and resume system operation. Sane new Theralnol 55 could be used as a flushing agent to remove any residual FR left In the system. This flush ing meterial should else be drained and returned for disposal. Ms would like to remind you that Theralnol 55 le not classified as a fire resistance heat transfer fluid. Consequently, you way wish to consider the use of protective devices to sinlslsc any added fire risks. Ms suggest that you consult with the Insurer of your property relative to this matter. DSW 018233 STLCOPCB4004778 -2- Also enclosed are labels to be placed on the containers of drained FR fluid for return to the address shown. We will pay the return freight. Should you have any sealed containers of new Thernlnol FR they ean be returned for full credit but please mark the drums dearly - "for return credit". Your cooperation is appreciated. Sincerely* cs Enclosure J. J. Roder Product Supervisor Heat Transfer Fluids DSW 018234 STLCOPCB4004779