Document KJv9GZX1NmwvpKqX5xgwD11yw

P. M. Zakriski SU9Js"T Tin in Cooling Water PiSLO POINT OP OBPT. & SLOG. NO. Brecksville R & D Center, D/8506 OATS THIS LETTER March 4, 1976 We received your water samp] es and were able to complete a quick and qualitative examination. With short notice we are unable to properly schedule tin analyses for precise measurement and therefore, only the quick range finding assay can be employed. The results of our testing follow. Sample if 1 2 3 4 5 6 7 Finding not detected, <2 mg/1 tin not detected, <2 mg/1 tin 2-5 mg/1 tin not detected, <2 mg/1 tin not detected, <2 mg/1 tin 2-5 mg/1 tin 2-5 mg/1 tin These measurements were made with an atomic absorption spectrometer without precon centration or .digestion. Normally, we use.a much more sensitive but slower colorimetric procedure. However, these measurements are in the same range as the one made for John McCool in November. This analysis confirms the presence of tin in your cooling water. It will be necessary to resample and analyze in a more careful manner to properly identify areas of high concentration and the exact amount of tin present in various wash stream. I suggest you call me around the 20th of March to arrange for proper scheduling of your next sampling. T0[)b9ZZZ jb cc: J. C. McCool R. J. Coffey R. M. Sandfry R. W. McKay W. T. Gunning J. R. Shellenberger W. W. Bates W. C. Holbrook R & D Files ll!H9 I~r n f r~: m b. .-n Q [r./V.v ^ .. . -rrs^i BFG19994