Six models of single-use dust respirators were evaluated for NaCl aerosol leakage while being worn by human test subjects. The respirators were evaluated for their ability to fit a wide range of facial sizes, for changes in efficiency after storage in a humid atmosphere; and for consistency of protection when worn for a six-hour work shift. Results indicate that only two of the six models tested provided a protection factor of 5 to all members of a 10 person test panel. Storage in a humid atmosphere had no detectable effect on five of the models, while one showed a decrease in the level of protection offered. Throughout a 6 hour work shift, four of the six models provided a consistent level of protection, while two showed variations in the level of protection offered.
12.1.Qualifications of Responsible Persons IT 12.2.Procedures and Standards I? 12.3.Evaluation «>f Prograo Effectiveness 17 12.4. Records •»* 12.5.Methods of Staying /.breast of New Developments in the Field '* \X SI'KClAl. I»HO«I.KMS !!• 13.1.Consunications-l!» 13.2.Prescription Classes H» 13.3.Facial KaiT-t*» 13.4.Dentures *** 13.5.Protective Headgear {••' 13.6.Use in Extrcaes of Teaperaturc •'" RKKKRKNt'KS M IV ENERGY RESEARCH AND DEVELOPMENT ADMINISTRATION DIVISION OF SAFETY. STANDARDS. AND COMPLIANCE RESPIRATOR MANUAL h> Durrvl II. DOUKIHS. Alan L. Hack. Bruce .1. Held, and Willinm li. Kcvoir I. INTRODUCTION t.t Purpose Thin msintsiit ha* been prepared (<• provide technical information for contractors or the KtH-ruy Hi-M'tifih ami Development Administration (ERl)Ai on the application of respiratory proiective device* for protection against air)x>rne contaminnnis. huth radiuucSive and sumradioaclive. The various element* of a respirator program including niu-l are described to assist in twuihltshini: adeqttntc program*. 1.2. Scope Hroad cimlanri' is proviairhonie niaterialti. The cuiriance is inundwi foritse by inanuiseinent ineslahlishint: programs and by oprralinjt jHTMinnel in iinpleinentini: programs. (•uidnnce t» primarily directed to the use of respirators to prevent the inhalation of air->K»rnt' contaminant!*. I'rotevtion nuuiiiM oiher mixlw«f intake (e.g.. absorption, swnilowin»{. wound injection, etc.i is, in Ht'iicral. »«t covenil: nor is the use of pnitective equipinent for head. eye. or skin protection. When such additionul nunies of intake «r concurrent mi/rtrcls. are present they must also IK-considered; and respirator,-protective equipment must i;e coinpat'Stle with the pmieiiion chosen against the combination of hazard* encountered. 2. BASIC POLICY REGARDING USE OF RESPIRATORS 2.1. U*> Condition* Tlie primary objective of respirator programs considered in this guide is to limit the inhalation of airborne contaminants. This objective is to be accomplished first by the application of engineering controls, such a* process change, containment and ventilation; then administrative control, and finally, when .such controls are not feasible or cannot be applied, the use of respiratory protective devices. In genera), the use of respirators as a substitute far other methods of control entails both greater likelihood of accidental exposures and greater likelihood that such exposures may go undetected. It might also subject the wcarcr to additional stress and increase his risk of injury by interfering with his vision, freedom of motion, and ability to communica'e. The provision and the use of respiratory-protective devices are subject to the following considerations. 2.1.1. Routine Operations. Routine operations are planned activities that are generally repetitive and occiir with various frequencies. For such operations, potential sources of airborne contaminants should...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.