Document Vj2gXJZ1eEpL5zdZp9r53RZzN

FILE NAME Manville JMA DATE 1976 May DOC JMA397 DOCUMENT DESCRIPTION Draft of Letter to Westinghouse RE Asbestos Fiber Roofing Products with Cover Memo Ranville Ranville Johns Johns Ranville Bak a Bak a Bak hana phn wh 3844490 3844490 ee wf. a oe t a , . abo. : a ay TS : ar rs Inn Paul Kotin From R. L. Fricklas Copies See end of correspondence Subject Date May 25 1976 Attached is through our a draft of a lotter we would like to submit local sales office to the Westinghouse Corporation They have told our local sales representative that no longer use asbestos built roofing because of hazards associated with it they will the health We consider this to be sufficiently serious that we have offered to provide discussions data and testing as indicated Please advise if this be made letter is o.k. or what changes should R. L. Fricklas CC R. D. Dickenson R. G. Ducey R. W. Rogers E. M. Fenner W. B. Reitze G. L. Swallow R. P. Filc Carter ; Chrono a) i otM t anville Sales Corporation Building Systems Division Greenwood Plaza Denver Colorado 80217 303 770-1000 DRAFT FOR WESTINGHOUSE RE Asbestos Fiber Roofing Products Since the early 1970's Manville has ducting health studies on all its products asbestos fibers been con- containing Uncontrolled release of asbestos fibers into the air constitutes a health hazard This fact is now well recognized However it is believed that a threshold level exists below which there is no health hazard OSHA established a maximum threshold level of 5 fibers cc in the early 1970's M's product areas were quickly brought down to this level and reduced below 2 fibers by 1974. This 2 fiber level exists today as the safe limit established by OSHA for occupational environments Because M is a major systems attention has production facilities well manufacturer of built roofing been focused not only on our but in our customer's workplace as For built roofing of new built roofs operations this means and in the both during tear or the application reroofing Early published results of a study conducted the National Roofing Contractors appeared in Insulation Magazine in 1972 by M and Siding- This program has continued and is still continuing The basic workforce program consists of using with the intake area near power filters on the the face Additional filters are placed upwind and downwind of the construction site Fiber below levels have been well below 2.0 0.5 fibers with two exceexceptip ons tions fibers with all cases summary attached This data shows that the fiber release is very low confirming our belief that asbestos roofing felts essentially consist of bound asbestos rather than free fibers DRAFTDRAFT PAGE TWO We are willing to provide interested parties all substantiating data to In addition M would be willing to equip the workforce on a forthcoming construction job with these test devices and to provide complete test results for analysis In addition our Medical Department would be willing to discuss this in depth with Westinghouse medical authorities to provide additional documentation if needed If further information is Environmental Coordinator Manville Greenwood phone 303-770-1000 needed please for Industrial Plaza Denver contact R. L. Fricklas Construction Products Colorado 80217