Document o7NBqv1vJznzaqN2Emd6844X

GRACE 3 v(y Conitrvdion Product, Oivition W.!. Groct & Co. 62 Wtiiitcmer* Avonu* 'yCombridg>. Mon. 02140 if** *' J^ A* ..'0 0 . * ,01^*1 g^J y.$ (6171 576-1400 June 7, 1982 ^ "Mr. Larry Mickey Timkin Co. . ^ v/18^5 Dueber Ave., S.W. ft&S' Canton, OH 44706 v* t' Dear Mr. Mickey: This letter is to follow up on our 6/7/82 conversation concerning M0N0K0TE Fireproofing. Prior to July, 1973, the Construction Products Division of W. R. Grace & Co. produced a sprayed plaster fireproofing product, MONOKOTE-3. MONOKOTE-3 Fireproofing, as manufactured, was a blend of lightweight vermiculite aggregate, gypsum, asbestos fibers and air entraining agents. The product contained approximately 13X by weight of the asbestos material. The Environmental Protection Agency banned asbestos containing sprayed fireproofing and in June, 1973, MONOKOTE-3 was removed from the market. When evaluating a future course of action with regard to older asbestos containing construction materials, such as MONOKOTE-3, considera tion needs to be made of the following parameters: ~ 1. The age of the material; 2. Its physical condition in-place; and 3. The possibility of physical damage, due to accessibility. Because of the "setting" characteristic of this gypsun-based product, we believe the asbestos fibers are encapsulated in the matrix. This conclusion assumes that the material is undisturbed and has suffered no in-place damage. If the material has been subjected to external forces which have left its surface sifting and flaking, consideration should be given to either removal or encapsulation of the material with a sealer. .* Of course, the overall concern is possible exposure to respirable asbestos fibers from the fireproofing and other materials. Only onsite, breathing zone determinations will determine the exposure concentrations. Air monitoring should be done In accordance with OSHA regulations. 9- Dfe June 7. 1982 > 2- - Mr. Larry Mickey Towards understanding this situation further, I have enclosed a copy of the EPA guidance document "Asbestos-Containing Materials in Buildings". This document provides much of the background of the asbestos problem in this country, along with generalguidelines on handling such problems. Please review the enclosed and get back to me if you have any questions or require clarification on a particular point. Very truly youi's. RCE:dm Enclosure Director, Quality Assurance R. A. Merther MIC-3 History