Document n98j85BVbbxX78v2YZEoyMYOm

FILE NAME Manville JMA DATE 1966 Dec 13 DOC JMA392 DOCUMENT DESCRIPTION Report - Asbestos Environmental Problems - Status Report - Nov 1966 Brake linings at A. C. Smith Research and Engineering Center December 13 1966 environmental Problems Status Report November 1966 Packings and Friction Materials Division Study of wear products from friction materials J. Dec During the period October I through November 30 1966 the wear from the special dynamometer enclosure was analyzed in detail dust The collected results were unexpected in that asbestos fiber could be detected only by the electron microscope which indicated a maximum of 1.4 per cent by weight fibrous debris This is in contrast to about 70 per cent by weight chrysotile fiber in the original friction material David Sinclair has accounted for the difference in fiber content by suggest- ing that high surface temperatures and severe abrasion convert the asbestos mathematicaly fiber into an amorphous mineral He further demonstrates mathematically that the very high temperatures 2000F required to break down fiber to this extent could be generated at the contact surface of a friction material even during mild braking This derives from the in which the apparent temperature does not exceed 200F fact that the true area of contact in the friction couple is about one per cent of the apparent area From this work it would appear that the fear of large fiber being introduced into the atmosphere as part of quantities of the wear dust asbestos of friction materials is unfounded However the tests to determine the bio- logical effects of such dust and we are therefore not in a regardless of its fiber content are position to draw final conclusions not complete Pipe Division A. An inexpensive inner coating for TRANSITE pipe J. H. Swensen A development program Project 22 is under way to develop an Improved Soft Water Coating for Potable Water Pipe The present coating based on asphalt has become more and more unacceptable due to taste and odor problems Efforts are being directed toward a clear coating which will not affect water quality Polyterpene- type coatings have looked promising although their UV resistance now appears to be this program will less have than satisfactory A to be inexpensive and coating developed within may fill the needs for a general TRANSITE pipe coating It is hoped that the improved sofr water coating can be commercialized in the first quarter of 1967 B. Effect of water flow through TRANSITE pipe A layout of a system for studying the effects of flow and water composition on TRANSITE pipe has been prepared and an assignment has been will not placed on the Engineering Department Probably this be operational until the second quarter of 1967 system PRODUCED JM - 83 A. C. Smith -2- December 13 1966 3 Fiber Glass Insulations Residue from flow of air through fiber glass ducts etc. J. Hannes initial tests run by the Kettering Institute with Corning Fiberglas duct indicated no measurable release of fiber into the air stream Much more extensive tests are under way now in the C laboratories under the supervision of the Kettering Institute Manville duct liners and duct board are part of these tests which will include a variety of air flow conditions Complete data will not be available until about March , 1967 Building Products Division A. Degradation products of asbestos felt built roofs J. Q. Trice The Instrument Development Company of Reston Virginia a division of Resources Research Inc. is preparing a preliminary engineering drawing and specifications for equipment which they propose for the actual weathering and collection of materials Briefly the environmental chamber will consist of four components a the mechanical chamber b the radiation system c the air handling system and d the liquid handling system Detailed information will be available from the Instrument Development Company by December 15 We now believe that the actual samples for weathering will have to be prepared outside the environmental chamber because of the high concentration of material thrown from the hot asphalt and from working with the roofing felts After the samples have been prepared one will be exposed in the environmental chamber and a second exposed on the roof of the Research laboratory so that at least visual observ- ations can be made comparing the performance of the two samples Materials produced or released into three categories during the weathering process will fall a b c particulate - which will be collected on membrane filters soluble - which will be picked up by the wash water which must also be put through a membrane filter in order to collect solids which are removed by washing vaporized materials - which will be collected at the low temperature traps in the air circulating system B. Degradation products of asbestos materials A program for sampling and testing materials has been drawn up The test program will include an examination of exposed material which has been in service for many years as well as laboratory exposure of products In the case of exposed products since shingles are partially exposed and partially covered in use it is possible for us to obtain good reference samples and analyze the changes that have occurred to the exposed surface A preliminary examination after long exposure shows of some vertically the following exposed normal PRODUCED JM - 83 products A. C. Smith -3- December 13 1966 Source of Samples JM office building Manville New Jersey JM plant Nashua New Hampshire JM plant Nashua New Hampshire JM plant Nashua New Hampshire Products Dry process shingles Dry process shingles Flat TRANSITE Corrugated TRANSITE Exposure Period 1918-1964 1926-1966 1921-1966 1924-1966 1924-1966 Thickness decrease during exposure inches 0.003 to 0.020 0.001 0.006 0.012 The small amount of weathering exhibited by these up the need for very precise measurements in this products points test program 5 Flooring Division Wear products from flooring materials J. Q. Trice Experimental work has not yet been started in this program 6. General Company Research Organic material in asbestos fibers F. L. Pundsack Cape $ Blue packed in paper bags and in jute bags was obtained from the Manville Pipe Plant and the organic content extracted The blue fiber packed in jute bags contained up to sixty 60 times as much organic mate- rial as did the fiber packed in paper bags Jeffrey chrysotile packed in paper bags and in jute bags is being analyzed in the same way and data will be available soon We are working with a company named Analtech to develop methods of ing all the trace organic substances present in asbestos identify- It may be of interest to note that in 1965 in the United States approxim- ately five 5 times as much pyrene was released in the form of cigarette smoke as was contained in all the asbestos used in this country for all purposes in the same year Incidentally more than half the pyrene associated with asbestos was contained 40,000 tons of imported blue fiber in the approximately F. L. Pundsack ae CC F. J. Solon - GHQ K. W. Smith -GHQ PRODUCED JM - 83