Document EvLEB5Ja9pKQreVywRqzmevNL

RESPIRATOR WORKPLACE PROTECTION FACTORS FOR ASBESTOS SUMMARY AND BACKGROUND Workplace protection factors for elastomeric and single use half-mask respirators were measured during asbestos removal operations. The operations consisted of asbestos removal from a ceiling (fire proofing) and removal of pipe insulation. Theuse of vater/surfactant solutions to spray fire proofing and insulation resulted in conditions of high humidity for in-doors operations. Out-of-doors operations were also under high humidity conditions since light rain occurred on two of four days of out-of-doors sampling. Temperatures for both operations were in the 65-85'T range. The respirators were used in the context f a respirator program that followed the guidance in 29 CFR 1910.134 and ANSI Z8B.2 (1980) including proper respirator selection and fit testing. A total of seventeen volunteers participated in the study. One or two workplace protection factors were determined for each respirator for which^the fit test had been passed. The respirators tested were: - One successfully fitted elastomeric facepiece respirator chosen for comfort from six respirators (MSA Comfo II and Survivair 2000 brands - small, medium or large 6i2es). These respirators were tested using a dust, fume and mist type filter and a high efficiency filter. DUP 0907355