Document 3Q3QnMQN750bmoJdx42w8Vnza

PLAINTIFF'S EXHIBIT j _______ .. j INTJU-COmPaNY CCRRSSPONDEN J17. 2; ;rr- K. Boynton - Kew York A. Lot* - Craaviils i-r>:::s r:-. rv-.--v-T:v: >ur.; p-. sr * June 20. 1C3 kr. R. C. Abo* - Berlin Mr. R. E. Davis - Nevirk kr. A. S. Kevlin - M* Yorky kr. 0. V. Pfisfer - Toledo^ kr. J. S. RhoiCs - Berlin kr. 8. V. Smith - Toledo kr. J. k. Testlake - Granville There re several sssoeiated problem* involved la the category of Kaylo dus1. These can be broken into three specific problems as follows: 1. Tne amount of dust wbicb oceurs on the surface of the aaterlal wr.ieh becoses bothersome when handling the produet. 2. Tr.e dust becomes airborne when the product la cut or fabricated. 3. Tne health hazard of the dust with respect to asbestosis. Tnt- current OCT Test Method Ko. b-07B Is a aeasure of only the surface d^*i anc does aot give any indication of the other two prohlea areas. From *<--. 1 have been able to ascertain, the primary dust prohlea with any Insula tion catenal is the dust that becomes airborne when the product is being i-.rieated. This becomes a serious problem is 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 la the Union Carbide Chemicals Company Institute, Vast Virginia. lasulatioa Fahricatloa Shop which I visited oa -> !, 19B2. 1 discussed the preblea of dust and dust aeasureaeat with * Robert B. Peele, the industrial bygteaist. They utilised a standard dwat ispinger for collecting saaples. The procedure for aeasuring the mount of dust is Involved and requires several pieces of saall equipment acicn we do aot have la our laboratory. ha*ed ea the threshold limit waives ef the Amerleaa Conference) of Governmental Industrial Bygieaists, the maaimua allowable asbestos dust la the air chert people are working is ft aillieas of partleles por cubic fact of air. Based os the ssbostos coateat of Ksylo, this would ho a Halting wslut af eeeeehtre hotweea 20 and 20 ail1 leas of particles per cubic foot ef air af Kayla dust abeve which a definite health basard would exist.* According to the aeasureecnts anew by Oaiee carbide ie their fahrlcatiee mhop With the dust eolleetlee systee is operaties, there was approxiestoly fo.r to IB tfKf with aa average of 10 MfKT as lag Kayle. levever, ehoa titiulistsi m uaod under the same eireumstaaces, the dust tauat eseeeds W LFXF which ecsns that Thermobest#* ie a doflalte health haaard. These vslwos eere glvea t* u* by Mr. Peele ss Brsad X rather that by their actual hare, hut ee kaov froa past experience Uat the aaterlal la Thereobestos. . H. boystoa 2 June 20, 1U T.-.e CC? Test ISetbod show* Thannobestos to have lots dust than Kaylo ba expected as Theraobastos has aoldad surface araas vberaas ibloc..* ara cut and btnca vail bava residual saw dust on tba surfaea. ; ..-.w rv files all of tba details of tba asset procedure that Union C.n.ct fello-a an collaetaaf and analysing dus; sar.plas. I aa not too cw-tiir. t.-.at tbaar proeadura is rtprasantativo for tba fantral easa, but ; also obvious that tba present OCf Tost Method M-07B is set answering i-:c oust problts. 1 reeorrend that as soon aa aan powar pars Its our Tast llatbod Croup begin tba assignment of aora eoapletely evaluating tba c.u: problas ar.d evolving a aethod which coats closer to evaluating all f*cats of tba dust problua. Tbas aatbod should be cade applicable to otter procoets such as G?L*400, ate. Willaaa A. lots Product Tastlag t VV `