Document 18LanYbrQQp5BoG24nLnZyKm

FILE NAME Corning OC DATE 1963 Sept 20 DOC OC059 DOCUMENT DESCRIPTION Internal Memo - Methods for Evaluating Kaylo Dust vVvuTFtVU Spee <a? ' Rantred eo IS COMPANY CORRESPONDENCE ca L oO NN foe - . . H. Boynton - New York warisaz A. Lotz Granville - NETHODS FOR EVALUATING KAYLO DUST Date = . June 20 1963 Mr. Mr. , Mr. Mr. Mr. Mr. R. C. R E. A,$ O W. J B. H V. J. M. Amos - Berlin Davis - Newark York Kevlin - New Pfiefer Toledo y | ey Rhoads - Berlin Smith - Toledo Westlake Granville There are several associated problems involved in the category of Kaylo dust These can be broken into three specific problems as follows 1 The amount of dust which occurs on the surface of the material which becomes bothersome when handling the product 2. The dust becomes airborne when the product is cut or fabricated 3 The health hazard of the dust with respect to asbestosis The current OCF Test Method No. 07B is a measure of only the surface dust and does not give any indication of the other two problem areas From primary what I have been able to ascertain the dust problem with any insula- tion material is the dust that becomes airborne when the product is being fubricated This becomes a serious problem in any location where a fabrica- tion shop is set up and a large quantity of dust is being generated in a confined area This is the case in the Union Carbide Chemicals Company Institute West Virginia Insulation Fabrication Shop which I visited on tay 16 1963 I discussed the problem of dust and dust measurement with Hr Robert B. Peele the industrial hygienist They utilized a standard Just impinger for collecting samples The procedure for measuring the amount of dust is involved and requires several pieces of small equipment which we do not have in our laboratory Based on the threshold limit values of the American Conference of Governmental Industrial Hygienists the maximum allowable asbestos dust in the air where people are working is 5 millions of particles per cubic foot C air Based on the asbestos content of Kaylo this would be a lisiting value of somewhere between 20 and 30 millions of particles per cubic foot of air of Kaylo dust above which a definite health hazard would exist According to the measurements made by Union Carbide in their fabrication shop with the dust collection system in operation there was approximately four to 18 MPPCF with an average of 10 MPPCF using Kaylo However when Thermobestos is used under 400 PPCF which means that values were given to us by the same circumstances the dust count exceeds Thermobestos is a definite health hazard These Mr. Peele as Brand X rather than by their actual gazo but we know from past experience that the material is Thermobestos PLAINTIFF'PLAINSTIF 'S : Exhibit a 526 808477 .. .. H. Boynton =2- . - June 20 1963 The CCF Test Kethod shows Thermobestos to have less dust than Kaylo the night be expected as Thermobestos has molded surface areas whereas Keylo blocks I have in my are cut and bence will have files all of the details of residual saw dust on the the exact procedure that surface Union Cd follows in collecting and analyzing dust samples I am not too certain that their procedure is representative for the general case but . .t as also obvious that the present OCF Test Method 07B is not answering ver busic dust problem . I recommend that as soon as man power permits our Test Method Development Group begin the assignment of more completely evaluating the cast problem and evolving a method which comes closer to evaluating all of the facets of the dust problem This method should be made applicable to other products such as GPL etc. . % bali William A. Lotz Product Testing