Document LngBqQgL0ZMeOzaJa21oXK73

FILE NAME Corning OC DATE 1966 Aug 9 DOC OC232 DOCUMENT DESCRIPTION Memo RE Bath Iron Works with Handwritten Notes FIBERGLAS COMPANY CORRESPONDENCE From Subject Mr. A. S. Kevlin - New York F. H. Edwards - Toledo BATH IRON WORKS Date August 9 1966 The subject company is pursuing the best course of action to solve their problems by hiring the Harvard School of Public Health as consultants They will determine the degree of exposure and recommend methods of bringing it to acceptable levels The American Conference of Governmental Industrial Hygienists a 2 Il | i Oo Aydt ; has established a threshold limit value sometimes referred to as maxi- mum allowable concentration for borne asbestos particles at 5 million particles per cubic foot of air Harris in the air should this exceed However exposures which is an average figure over an hour working exposures may be considered excessive if massive exposures not day occur at certain times of the work period even though the computed average is within the limit value 1 / i / The extent of air contamination is determined by the air sampling unit a Konimeter in this case In order to avoid expense and work the ( hygienist may assume that the collected aggregate consists only of the f UFUGNDHE coouwfonrkctouintningg htciataerczolmecte)dardous work , borne in sampling material This is seldom case Many other dusts are air- the industrial atmosphere and of course are collected by the unit I am sure that Harvard will analyze the samples for titer titer cam asbestos fiber As an example our Kaylo products are composed primarily cam of calcium silicate which is not considered a health hazard Intermixed in the calcium silicate is approximately 15 of asbestos fiber Obviously & of the dust created in the cutting or sawing of Kaylo should contain about this same percent of asbestos FUUNjDEu segregatiangsbcoellsectted segregating colected segregating It is possible that Harvard may of the A.C.G.I.H. and may suggest a lower they no doubt have data to support it not agree with the limit If such is limit value the case tera segregating the tera avoids segregating avoids the they have Because of Bath Iron's unfortunate experience I am sure that will want to take drastic measures to prevent future problems They two alternatives with a hazardous material 1 provide ventilation adequate to maintain dust levels within the recommended limits or 2 provide suitable approved respirators for workmen if ventilating equipment cannot be adapted to the operation The former method is the best because \ workers will remove the masks whenever supervision is looking the other way Asbestossobocto lung ds iseasi e after as fter years or more exposure Consequently , Ann enlightened company will pro- vide protection and we should endorse adequate health and safety programs As you know many companies are handling asbestos without health problems and they are doing it by means of good protective measures : FHE F. H. Edwards 257