Document 37ry5wEbyeLnNKNa0VMEznBox

THE MOUNT SINAI MEDICAL CENTER ONE GUSTAVE L LEVY PLACE * NEW YORK. NX 10029 Mount Sinai School ofMedicine *The Mount Sinai Hospital * . 'June 22* 1983 Eitvtreimmuf Settneaa Laboratory Cwinutp Baaie 5cimei BuJding .20 Coat 202 Strati Nt* York, Ntw York 20029 (2222 630-6272 .* . . J: Mr* Jerry Coldfarb . Scientific Coating Co., Inc. ' 177 William Street Orange, KJ ^ *' / Be; Analysis of Konokote MR--5 sanple, Lot No. 311, Trenton, NJ, for asbesti-- form mineral content. * * .... ' . . Dear Mr. Coldfarb: A sample of Monokote MX--5 has been prepared for, and analyzed by transmission electron microscopy, selected area electron diffraction, and microchemical analysis**, using energy-dispersive . X-ray analysis. The results show that mineral fibers are present in the sample which have properties consistent with asbestiform tremolite. This conclusion is based oamorphological, crystal structural and micro- imical analyses. This conclusion is further supported by a comparison with analysis of a tremolite standard # from the Libby, Montana verrdeulih* ore, from which MK-5 is derived. The MR-5 and the tremolite standard have the same ratios of Ca;Si and,Mg:Sl, as well as similarities In their contents of potassium and iron. Other mineral fibers present in HK-5 include other altsainosillcates, calcium oxide.or carbonate and titanium dioxide. The length:wldth ratios of the tremolite fibers observed are typically 10:1, and greater.- The width of the fibers is typically 0.5 micrometers, or less. This narrow width would render the fibers very difficult to be seen and identified by optical microscopy. Precise quantification of Che tremolite content of the sample is difficult. It nay be estimated that the tremolite content is on the order of 1 percent, . by volume. . . Please contact me if there are questions regarding these results. i AHR; jm Enc. Arthur N. Rohl, Ph.D. Assistant Professor^ Mineralogy EXHIBIT B