Page 46 - OHS, July/August 2020

PPE: RESPIRATORY PROTECTION
■ If it has two straps, pull the lower strap over the head and position around the neck.
■ Pull the top or single strap over the head and position so it is on the crown (top) of your head.
■ If provided, fit the flexible band on the nose bridge by pressing down so that it conforms to the shape of your nose.
■ Lastly, users should ensure that the mask is snug to the face and covers the chin.
■ To remove, pull the top strap off first and then the lower straps.
If using a face mask with ear loops:
■ Secure the loops behind each ear.
■ If provided, fit the flexible band on the nose bridge by
pressing down so that it conforms to the shape of your nose.
■ To remove lift both the ear loops off the ears at the same
time and then gently remove the mask from the face.
N95 Disposable Respirator
N95 respirators are tight-fitting respirators that filter out at least 95 percent of particles in the air. Please note that particle sizes vary tremendously. N95 respirators are tested by the National Institute for Occupational Safety and Health (NIOSH) to the most pene- trating size particle, which is 0.075 microns, +.02. When properly fitted and worn, minimal leakage occurs around the edges of the respirator when the user inhales.
When donning a disposable N95 respirator,3 you should follow these steps:
■ First, hold the respirator in the palm of your hand with straps facing towards the floor.
■ Next, hold the respirator under the chin with the nosepiece facing outwards.
■ Then pull the lower head strap around the neck below the ears and while holding the respirator in against the face with one hand, place the upper strap above the ears around the crown of the head.
■ Place your hands on each side of the respirator and move slightly right, left, up and down, to adjust the position of the respi- rator and achieve the most optimal fit on the face.
■ Mold the nose clip over your cheeks and bridge of the nose to obtain a tight seal.
■ Next, perform a user seal check by placing both hands completely over the respirator and take a few deep breaths and feel around the mask to ensure there is no air leaking out, indicating a good seal.
To remove the N95, the user should start by holding the respira- tor with their dominant hand to maintain its position on the face. Then pull the bottom strap over the head and while still holding the respirator in one hand, lift and remove the mask from the face.
Half-Mask Respirators
In industrial settings, sometimes workers need to use a half-mask respirator that is designed to minimize breathing of airborne con- taminants. Users should always inspect a half-mask respirator be- fore each use. If any parts are missing or damaged, replace those parts or the entire mask. If you are using a replaceable particulate filter, make sure the pad filter is in the filter cover and facing the correct direction. Then thread the filter assemblies onto the car- tridge connectors. If you are not using the replaceable filter, but
using the cartridge instead, simply thread the cartridge onto the cartridge connectors in the facepiece.
To don the half-mask respirator, follow the steps outlined in the manufacturer’s User Instructions for the respirator you will be wearing. The following steps are a general guide for one style of Honeywell half mask:4
■ Adjust the upper and lower head straps to their full outward position.
■ With one hand holding the respirator, place chin inside the chin cup and the top of the respirator over the nose.
■ With the other hand, position the cradle suspension on the center of your head. Remove any slack in the upper straps by pull- ing the two end tabs back and towards the ears.
■ Fasten the bottom straps behind the neck, making sure it is under any hair. Remove any slack in the bottom straps by pulling the end tabs back towards the front.
■ Next, tighten the upper head straps in small, equal incre- ments to ensure the top half of the respirator is tightened evenly and centered on the face.
■ Then tighten the lower head straps by pulling evenly on the end straps in the back of the respirator until the entire respirator is snug, comfortable and centered on your face.
Once the half-mask is in position, exhale vigorously and then perform a user seal check to ensure the mask is in good working order.
To perform a positive pressure seal check, place the palm of your hand over the exhalation valve so it is completely sealed and exhale gently. If there is a good seal, the facepiece will be pushed away from your face very slightly. To perform the negative pres- sure seal check, place the palm of each hand over the two filters so they are completely sealed, and inhale. Hold your breath for five seconds. If there is a good seal, the facepiece will be pulled inward toward your face.
To remove the half-mask respirator, simply unfasten the bottom straps and then loosen the upper straps. Use one hand to hold the facepiece and lift the mask off.
These face masks and respirators are just a sampling of the types of protection that may be used more frequently as everyone returns to work. While this article cannot provide donning and removing instructions for every type of respirator, the hope is that this infor- mation can get most employers and workers off to the right start.
Every worker should familiarize themselves with the required respirators and additional personal protective equipment for their worksites. For more details, workers should speak with their super- visors about specific respirators, their employers’ written respiratory protection program and additional worksite requirements.
Lynn Feiner is Sr. Offering Manager for Air-Purifying and SCBA Respiratory Protection at Honeywell.
REFERENCES
1. https://www.osha.gov/SLTC/respiratoryprotection/ 2. https://www.cdc.gov/niosh/npptl/respusers.html
3. https://safety.honeywell.com/en-us/products/by-category/respiratory- protection/disposable-respirators/one-fit-molded-cup-niosh
4. https://www.honeywellsafety.com/Products/Respiratory_Protection/ Honeywell_North_HM500_Series_Half_Mask.aspx?site=/europe
40 Occupational Health & Safety | JULY/AUGUST 2020
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