Document 1gNj5JbgvYrbqBbO3EomNp7Zd

FILE NAME Kent KNT DATE 1949-1958 DOC KNT112 DOCUMENT DESCRIPTION Recommended Safe Practices - Asbestos - Hazard Classification - Mass Dept. of Labor & Industries RECOMMENDED SAFE PRACTICES vd" HAZARD CLASSIFICATION DUST VERY HARMFUL - May cause asbestosis GENERAL Asbestos is a fibrous mixture of various silicates mainly the hydrated silicate of magnesium with additional quantities of iron aluminum , sodium potassium and calcium The fibrous characteristic rather than the chemical composition is responsible for the harmful tissue changes in the lungs Industrial asbestos is chiefly derived from Canada Italy and the Transvaal . Asbestos is used in a variety of products The long fibres are used in the textile industry for the manufacture of cloth braid rope theatre curtains etc. The shorterfibres together with an agglomerating agent are used in the manu- facture of felt paper cardboard varnishes covering agents cements and rubber tires | HARMFUL May cause asbestosis a disease of the lungs in which the af- EFFECTS fected lung tissue becomes partially collapsed and fibrotic lung The unaffected tissue tends to become dilated and emphysematous The signs and symptons are cough expectoration shortness of breath weight loss and easy fatigability Occasionally asbestos corns may occur in the skin of the hands caused by penetration of asbestos fibers into the layers of the skin It takes five to ten years for asbestosis to develop Death in these cases is susually tuberculosis the result of infection of the lungs disease such as or from congestive heart MAXIMUM ALLOWABLE CONCENTRATION tion is 5 million particles of asbestos dust : _ For continuousexposure to respirable dust the maximum allowable concentra- per dubic foot of air PROTECTIVE MEASURES The asbestos dust should be controlled at the point of origin by use of local exhaust systems or wet methods The operation dispersing the dust should be isolated or enclosed or the operation so changed as to eliminate the dispersion of the dust Approved dust type respi- raters are recommended only as a last resort MEDICAL CONTROL employment physical examination including an ray of the chest should be required of all where exposure to employees excessive dust will be encountered Individuals with a history of tuberculosis should not be placed in a dusty atmosphere Periodic physical examinations including chest rays should be required at least annually of all persons employed in dusty asbes- tos operations MASS MASS LABOR INDUSTRIES MASS DEPT LABOR LABOR INDUSTRIES DIVISION OF OCCUPATIONAL HYGIENE Billetin Number 492 February 1949 RECOMMENDSEAFDE PRACTICES -_ ee om - MINERAL DATA SHEET NO 2- | Asbestos a . ee Asbestos Asbestos Asbestos Asbestos Asbestos Asbestos CONFIDENTIAL PURSUANT TO THE Asbestos Asbestos IERARDI PROTECTIVE ORDER DATEDDATED : _ JANU7A1R9Y91 HAZARD CLASSIFICATION DUST - VERY HARMFUL - May cause asbestosis GENERAL Asbestos is a fibrous mixture of various silicates mainly the hydrated .* silicate of magnesium with additional quantities of iron sodium potassium and calcium The fibrous characteristic rather than the , acsobmepsotossitiison is responsible for the harmful tissue changes in the lungs chemical Industrial chiefly derived from Canada Italy and the Transvaal ae ay ~ 7. J. Asbestos is used in a variety of products The long fibers are used in the textile industry for the manufacture of cloth braid rope theatre ~ etc. The shorter fibers together with an agglomerating agent are curtains used in facture of felt paper cardboard varnishes covering agents cements , rubtb heer matnu i-res HARMFUL EFFECTS Prolonged exposure to asbestos dust will cause in HARMFUL EFFECTS individuals a chronic lung disorder known susceptible - This condition tends to develop very slowly usually within five as asbestosis 10 - its effect upon the worker's ability to work be years and _ may slight . disease are tendency to cough and expectoration chest The first signs of . ~~. . Examination of the pain sputum may reveal called asbestos and weight loss SO, extent which show changes in varying bodies . ray films will The disease tends to are considered characteristic for asbestosis to perform work progress slowly but until late At may not interfere with a worker's ability ~~. signs of heart failure that time there may be marked shortness of breath or Some observers have reported an in suffering from increased tendency cancer patients asbestosis to lung a Mo ., CY we Skin small of the lesions occur if fibers asbestos are imbedded into the skin and cause a local foreign reaction asbestos corm MAXIMUM ALLOWABLE CONCENTRATION oy CONCENTRATION For continuous exposure to respirable dust the maximum allowable concentration is 5 million particles of asbestos > dust per cubic foot of air - > | . . Co PROTECTIVE MEASURES PROTECTIVE PROTECTIVE The asbestos dust should be controlled at the point of - . The operation origin by use of local exhaust systems or wet methods - dispersing the dust should be isolated or enclosed or the operation so changed as to eliminate the dispersion the dust tors Approved dust type respira- are recommended only as a last resort : Mo To a CONTROL pulmonary findings CONTROL MEDICAL A employment physical examination with special emphasis on and a good chest film should be required for all personnel to be exposed to asbestos dust The ray films and physical examinations should be repeated at regular intervals during the employee' . exposure in order to detect early cases oo , me . TREATMENT vd therapy recognizable There is no involvement specific should be known Workers with removed from asbestos exposure lung 090376 | Massachusetts Deportment of Labor and Industries 090376 ~ No. 718 . ' Publication Sa3854 Sa3854 Division approved by of Occupational Hygiene Supersedes No. 492 Bernard Solomon State Purchasing Revised March Agent - No. 1 1958 ~ RECOMMENCED ARE ARE PRACTICES PRACTICES HAZARD CLASSIFICATION CLASIFICATION JUST- VERY HARMFUL magnesium aluminum GENERAL ~ os og Asbestos is a fibrous mixture of various silicater mainlymainly the hydrat silicate of with additional nuantities of iron sodium potassium and calcium The fibrous characteristic rather than the ches composition is responsible for the barnful tissue changes in the lungs Indust asbestos chiefly derived from Canuda Italy and the Transvaal Asbestos is used in a variety of products The long fibres are used the textile industry for etc. The shorter fibres the banufacture of cloth braid rope theatre curtain together with an agglomerating agent are used in the 20 facture of felt maner cardboard varnishes covering agents ormente and rust - tires HARMFUL EFFECTS EFFECTS The unaffected lung May cause asbestosis a disease of the lungs in which the af fected lung tissue becomes partially collapsed and fibrotic tissue tends to become dilated and emphysematous The signs and symptons are cough expectoration phortness of breath weight loss and eas fatigability Occasionally asbestos corns may occur in the skin of the hands caused by penetration of asbestos fibers into the layers of the skin It takes live to ten years for asbestosis to develop Death in these cates is usually " the result of infection of the lungs such as tuberculosis or from congestive h disease MAXIMUM ALLOWABLE CONCENTRATION tion is 5 million articles of asbestos dust For continuous exposure to dust the maximum allowable her dubic foot of air respirat concent PROTEopCeTrIaVtiEon method The MEASURES The asbestos dust should be controlled at the scint c origin by use of local exhaust systeos or wet dispersing the dust should be isolated or enclosed or the ape so changed changed as to eliminate eliminate the dispersion dispersion the of the resort resort duate duate : Approved Approved Approved Approved : dust dust o., Pua . ble ovepe MEDICAL CONTROL employment physical examiation including an Miray Miray of dust excessive will be c enhceosutnstheorueldd be required of all employees where expoesuxreposure Individuals with a history of tuberculesip shouldchest placed in dusty atmosphere atmosphere Periodic physical examinations including chest annually rayosperation^ or should at least be required TE teres - nt least eee annually 7 of allpersnom ne s employed in not be WINDUSTRIES WINDUSTRIES OF LIBOR MASS WINDUSTRIES WINDUSTRIES WINDUSTRIES WINDUSTRIES WINDUSTRIESWINDUSTRIE LIBORLIBOR WINDUSTRIES WINDUSTRIESWINDUSTRIES * MASSDIVISIODNIVISIONOFLIBOROCCUPATIONAL HYGIENE aleefay? - $