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The program covers up-to-date information on the proper procedure for selecting respirators for a particular hazard. Proper fitting procedures are outlined. Explains respirator capabilities and limitations, emergency situations, inspection, seal checks, exposure symptoms, and more.Excerpt:
Anyone wearing a respirator must be trained and authorizedby the company in several different areas such as how to put on and take offthe respirator. We call that Donning & Doffing. The process is simple, butit does require some basic knowledge which we'll now review. You are beingasked to select the respirator that provides the most acceptable fit. A mirrormust be provided to assist you an evaluating the fit and positioning of therespirator. Each respirator represents a different size and shape. And iffitted and used properly will provide adequate protection. Hold each face pieceup to the face and eliminate those that do not give you an acceptable fit. Putthe most comfortable mask on your face and wear it for at least five minutes.If you're not experienced wearing a respirator put it on and take it offseveral times to become familiar with the process. Be sure to adjust the strapseach time the respirator is donned. While wearing the respirator check thecomfort of the mask, how it fits your face, nose, and proper seal between themask and your face and cheeks. Make sure your chin fits the respirator. Checkthe strap tension to make sure its not too loose or too tight. Some respiratorshave a tendency to slip. So check the fit in the mirror and through testing ofthe fit. Move your mouth as if talking to make sure you don't break the seal orfit. Before conducting the negative and positive pressure checks set the maskon your face and move your head from side to side and up and down to ensure astable fit. Make sure there is room for eye protection and good vision. If youwear glasses the glasses cannot extend through the seal of the mask.
Conductseal checks. If you have any facial hair or sideburns that would prevent aproper seal you cannot wear or select the respirator. While selecting orwearing a respirator, and you have difficulty in breathing, you must stop andbe provided a medical evaluation before being allowed to use respiratoryprotection. To conduct a ôpositive pressure seal checkö close off theexhalation valve, and exhale gently into the face piece. The face fit isconsidered satisfactory if a slight positive pressure can be built up insidethe face piece without any evidence of outward leakage of air at the seal. Thenegative pressure test is conducted by closing off the inlet opening of thecanister or cartridges by covering with the palm of the hands, or by replacingthe filter seals. To remove the respirator you should loosen the straps, andwhile pulling on the straps, allow the mask to gently release from the faceseal. Upon removing the mask it should be cleaned, disinfected, and storedaccording to the manufacturer's recommendations.
Let's now take a look at someof the different types of respirators so you'll have a better understanding ofproper selection for the hazard to which you may be exposed. Okay, let's beginwith permissible exposure limit. PELs are exposure limits for each differentchemical. Established by OSHA, PELs may be expressed as a Time WeightedAverage, or TWA, or as a ceiling exposure limit. TLV, or threshold limitvalues, are used by industrial hygienists to express the airborne concentrateof a material to which nearly all workers can be exposed day after day withoutadverse effects. Each chemical, or airborne concentration has different TLVs.Oxygen deficiency simply means there isn't enough oxygen in the air to supportlife. IDLH is Immediately Dangerous to Life and Health. All oxygen deficientatmospheres must be considered IDLH. The word particulate means a particle ofsolid or liquid matter. Matter is divided into three states: solids, liquids,and gases. Solids are either finely divided dust particles such as fromgrinding operations, or as still more finely divided metal fume particles asgenerated when smoldering hot metals vaporize.