Document xj8Y1B9MrQN2XdNwQqZqM1zVE

FILE NAME Corning OC DATE 1963 June 20 DOC OC265 DOCUMENT DESCRIPTION Memo - Methods for Evaluating Kaylo Dust ee ene eR ee * were ne 3 <eas] . FIBERGLAS FIBERGLAS COMPANY CORRESPONDENCE om Voajen Mr. J. H. Boynton - New York William A. Lotz ~ Granvill METHODS FOR EVALUATING KAYLO DUST Cov bead June 20 1963 Mr. A. C. Amos - Berlin Mr. R. E. Davis - Newark Toledo : Mr. Mr. A. S. O. W. Kevlin - New Pfiefer - York York Kr J. B. Rhoads - Berlin Mr. J. M. Westlake - Granville There are several Kaylo dust These can associated problems involved in the category of be broken into three specific problems as follows 2 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 bealth 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 what I have been able to ascertain the primary dust problem with any insula- tion material is the dust that becomes airborne when the product is being fabricated This becomes a serious problem in any location where a fabrica- Lion shop is set up and confined area This is a large quantityof dust is being generated in the case in the Union Carbide Chemicals Company Instituto West Virginia Insulation Fabrication Shop which I visited on May Mr. 16 1963. Robert B. I discussed the problem of dust Peele the industrial hygienist and dust measurement with. They utilized a standard dust impinger for amount of dust is collecting samples The procedure for measuring the 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 - of air Based on the asbestos content of Kaylo this would be a limiting value of somewhere between 20 and 30 millions of particles per cubic foot of air of According Kaylo dust above which a to the measurements made definite by Union bealth hazard would exist 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 the same circumstances the dust count exceeds 100 MPPCF which means that Thermobestos is a definite health hazard These values were given to us by Mr. Peale as Brand X rather than by their actual name but we know from past experience that the material is Thermobestos 01 081 1884 Mr. J. H. Boynton -2- June 20 1963 The OCF Test Method shows Thermobestos to have less dust than Kaylo which might be expected as Thermobestos has molded surface areas whereas Kaylo blocks are cut and hence will have residual saw dust on the surface I have in my files all of the details of the exact procedure that Union Carbide follows in collecting and analyzing dust samples I am not too cortain that their procedure is representative for the general case but it is also obvious that the present OCF Test Method 07B is not answering our basic dust problem I recommend that as soon as man power permits our Test Method Development Group begin the assignment of more completely evaluating the dust problem and evolving & method which comes closer to evaluating all of the facets of the dust problom This method should be made applicable to other products such as 400 etc. WAL vv William A. Lotz Product Testing 01 081 1885