Document wqX3RXopq6kGO0Ro7JLJ2Qmv6

r* Respirator Committee industrial Hygiene Committee April 23, 1979 > <* Vc / .. / / V1 // RECEIVED APR 26 1979 1 e 1 " MEDICAL DIVISION //>'"< To: From: Respirator Coordinators D. T. Lefferts Building I 09 A DISPOSABLE RESPIRATORS Since returning to Chambers Works, I have reviewed many respirator approval requests. Many have been written, but a few have been J. handled by telephone. More often than not, the request centered on the 3M No. 8710 disposable respirator. I believe some general c 1 arification is in order. The 3M Company markets several NI OSH-approved disposable respira tors as weii as several resp i tutors not iiovlug N t 0 3H-app ruu 1 . 71. unapproved (net disapproved) respirators are for use for the comfort of the wearer. These unapproved respirators are for such applications as: * Protection from angoyance from grass seeds, pollen, soap powder, blood, bacteria, hair, wood slivers, etc. * Protection from annoyance from foul, vapors and gases encountered by morticians, stockyard workers, sewer and sanitation workers, etc. * -Protection from annoyance from "nuisance" or "inert" particulates at less than exposure limit concentrations. The NIOSH-approved No. 8710 respirator is approved for fiberous particulates and for particulates whi ch cause pneumoconiosis and for nuisance particulates. Some materials which are in these ap proval categories are: * Silica * Silicates (Talc, Kaolin, Bentonite, Fuller's Earth, Mica, Cement) Coal * __ G raphite (* Asbestos *7 SUcTcTe Diatomite, Tripoli, DUP 0904982 121 330 SC-DP-05885