Document qdk0Lg9xd77oK47z9dGqJv2qK

FILE NAME Talc TALC DATE 1976 Oct 29 DOC TALC479 DOCUMENT DESCRIPTION Memo RE Pfizer Talc Samples JM Manville Internal Correspondence R. ws 3-05 ; To _ Lamar - " . * 7 Date October 29 1976 From M. Fenner- 1-06 Copies G. R. Kinzer - D Subject . PFIZER TALC SAMPLES 5 oo, ot -. Harold D. Stanley Jr. , Group Leader - Testing in the Minerals Pigments and Metals Division of Pfizer called me today to report their analysis results of the five talc samples you furnished them at the end of their visit on Tuesday- : August 31 | Research ID No. Pfizer Code No. Total Tremolite - % | 74340-3 CP 38-33 13-14 > RC 74340-4 CP 20-30 3-4 RC 74340-5 CP 14-35 7-8 RC 74343-1 RC 74343-2 cP 38-33 CP 14-35 10-11 The total percentagoef tremolite present in determined by ray diffractiaonnd included and particulate material the samples was both fibrous The samples microscopy were also examined by transmission electron The results of this analysis indicated that by less than 0.1 Stanley stated was fibrous the OSHA definition Mr. . they were observing an average of fi, bers . in 100 microscope fields- ' ', M. Mer EMF jh ASBESTOS IN MANVILLE PENHORWOOD TALC 9 - Samples of Manville Penhorwood talc have been o thoroughlyexamined using electron microscope techniques The minute |quantity of micron asbestiform mineral found is not statistically significant according an to tthhethee criteria employed by the U. S. Environmental Protection Agency . Talc samples were also by examined light light light light microscopy microscopy microscopy using the procedure specified by the Occupational Safety and Health Administration for determination of asbestos fibers fibers No were detected by this method - 000220