Document aD4M3RJDjnygVggGrK590JXEX

FILE NAME: Oil Industry and American Petroleum Institute (API) DATE: 0000 DOC#: API123 DOCUMENT DESCRIPTION: Excerpt - US Dept of Labor Bulletin - Respiratory Protective Equipment I/ Protective Equipment 14 II I ft II "I U.S. DEPARTMENT OF LABOR Arthur J. Goldberg Secretary BUREAU OF LABOR STANDARDS Arthur W. Motley, Director 4 I r (2) Fibrosis-producing dusts, or other pneumoconiosis-producing dusts that are not taken up by the blood stream but remain in the lungs and may cause significant pulmonary impairment. Examples are: caosbael stos cfraelecinesdilidciaato(mqaucaerotzu,s efalirntth, bauxite sandstone, agate) (3) Nontoxic and nonfibrosis-producing particles (so-called nui sance dusts and mists) that may dissolve and pass directly into the blood stream or may remain in the lungs producing neither local nor systemic effects. Examples are: cgorattionn pfuorllen ffleoauthr ers wwoooold It should not be assumed that all nontoxic and nonfibrosis-producing dusts are necessarily harmless. Many such dusts may be irritating or are allergy-producing to susceptible persons. And extremely high concentrations of any dusts should be viewed with suspicion. thePiarrptihcyusliactael cporonptaemrtiinesa,ntins tmhareyebberocaldasgsirfoieudpsf:urther, according to (1) solid, such as dusts and fumes; (2) liquid, such as mists and fogs; and and(3p)aiantcsopmrabyins.ation of solid and liquid, such as silica-water sprays The majority of particulate contaminants are not immediately dan gerous to life; that is, days, weeks, or even years of exposure may elapse before harmful effects are noted. Notable exceptions are dusts and mists containing the organic phosphorous insecticides which, if present in high concentration, may incapacitate or even kill a man in a very short time. As in the case of gaseous contaminants, all processes pforordpuocssinibglephaartrimcuflualteexcpoonstuarmesi.nants should be thoroughly investigated Combination of Gaseous and Particulate Contaminants In addition to atmospheres containing gaseous or particulate con taminants, there are those in which both types occur simultaneously. The contaminants may be entirely different substances, such as carbon mfroomnoxthideeblaansdtedoxmidaetseroiafl,noitrrothgeeynmpraoydbuecethdebsyambelassutbinstganacneds itnheliqduuisdt 8 t 002768