Document 06eNvygJaG5ZRXnOD536x8Mjx

FILE NAME Corning OC DATE 1965 Jan 20 DOC OC228 DOCUMENT DESCRIPTION Letter to Insurance Company RE Kaylo 4 37 . 740 an aeoy 3 me ^' ; i ae PLAINTIFF'S , EXHIEW Mr. Fred Cook Manager Safety Engineering Department Bituminous Casualty Corporation Rock Island Illinois Dear Mr. Cooks Sam Thomas has just referred your letter of January 15 1965 and copies of your two previous letters letters to me for reply Please accept my apology for the delay in response to these communications but for some reason neither of your earlier letters reached this department In answer to your question the mount of asbestos in Kayle and Kaylo 20 ranges from 12 to 16 of the total quantity of material in these products This is a relatively small amount particularly in relation to earlier forms of insulation As you know the per cent of asbestos fibers in the preformed product are significant only as it might permit an estimate of the number of borne fibers in the working environment Air samplings would provide this information but such data are most difficult to obtain particularly under the variety of conditions that a construction worker usually operates However with respect to asbestosis I will mention a few factors that may be of interest The American Conference of Governmental Industrial Industrial Bygienists an annual Threshold Limit Value for numerous materials This publishes is widely accepted in the United States The limit value for gausibdeestos is 5,000,000 particles per cubic foot and is based upon current knowledge and experience These values are subject to change as new data are obtained I m sure that you are fruiliar with this publics- tion so I will not go into more detail on the subject During a recent world symposium on the toxis nature of asbestos two interesting points were mades reporting 1. That in the broad experience of most of the docters and scientists neither symptoms nor pathogenesis are usually detected ; prior to 12 years of exposure to asbestos January 20 1963 2. That it is extremely difficult to distinguish between asbestosis and some of the other pulmonary diseases by radiographic meas alone As you know it is not uncommon for an allment or disease to be attributed to a current and known exposure purchases have been The Fiberglas Corporation does not produce asbestos but it from other sources Actually the sales of Laylo products a minor portion in the field of high temperature insulations To doubt some of the larger producers are better informed on the subject then we are and perhaps would be better able to answer your questions ' Sincerely 7. R. Edwards Director of Bealth & Hygiene a b 178