Document GKpdq6R8N7aMg9pgBVm1E1Xn

tMr.cHarold -- fl&lraska^Chrls^ >$B^9ur pfc>rfoll|!l ~............ fDer;Hr.;iOUlko^P^|`. . ... &:&>**'' < * . - ' ' l. - --.r'' ' '' ?- -; --f'1 Wi^m0r-t?.,"; * This Is In response'to your recent Inquiry to our Mr. Max Dya cerning MONOBOTE Fireproofing (MK-3) which was used in 1969 at youc -College.:';"'"" V'-'Y ; This produce was a mill-nixed blend of lightweight verniculite aggre gate and air-entraining agent in a gypsum binder. As manufactured, appro ximately 14Z of asbestos was added to the product. Sales of this asbestoscontaining product was discontinued In 1973. In deciding on an appropriate course of action with regard to in-place material such as this, consideration needs to be made as to the type of pro duct used, the physical condition of the in-place material and the accessi bility of the material to physical damage and dusting. Zonolite Monokote Fireproofing (MK-3) should not be confused with those products which were formulated with higher asbestos contents (up to 502) and were air sprayed to form a low density, fluffy, lightly bound mat. By contrast, Monokote was formulated to be combined with water on the job site to produce a cementitious plaster-type mixture which set to a relatively dense and durable material, well bonded to the surface to which it was applied. Because of the "setting" characteristics of this plaster-type material, we believe that the asbestos fibers are encapsulated in the matrix, and therefore, are not subject to release into the environment. If, however, the material has been damaged or has deteriorated so chat the surface is subject to dusting or flaking, consideration should be given to either (1) removal of the material, or (2) overspraying and sealing of the surface. Enclosed is a list of sealers tested by Battelle Columbus Laboratories to meet EPA regulations. Since your concern is possible exposure to respirable asbestos fibers which might be released from the material, only on-site air sampling measure ments will determine the actual airborne asbestos fiber concentrations. Air monitoring should be done in accordance with OSHA regulations. 100*12775 ' *'> v> ^ >:' ;;K ... \ ' -v- svV*.' ;.< -t - ' '&.: v - :V-V. /"S-** rA J WMm^ ..................... .. ' . -/-;^r .' y--ujf^S0 -'- . Eaclosedtis:fa'v'>copy of the EPA guidance document "Asbestos Containing Materials''in- SchoolBuildings". This document provides much of;the back ground on the asbestos problem in this country along with general guidelines on handling;such'problems. , :, \'v .................................. Please review the enclosed and get back to me If you have any questions* '. :.**,v' vr'-; ' ."V t. ;i Sincerely,; - - '.* ^%-ULc.k^ ;..: ,-*v J "' Robert'- T. Frohlich V j Manager, Product Support RTF/jdg Enclosures * '/ CC: Mr. Max Dyal BCC: S. L. Ahern R. J. Bettacchi J. HcDougall R. A. Merther P. J. Walsh 10042776 aS UyO