Bearded seal

Russia Lake Ladoga, 1990-93 Bearded seal, Erignathus barbatus Hair 1.4 (0.6-2.1) DW 176... 

Smith, T.G. and F.A.J. Armstrong. 1978. Mercury and selenium in ringed and bearded seal tissues from Arctic Canada. Arctic 31 75-84. 

MARINE MAMMALS Bearded seal, Erignathus barbatus, Alaska, 1963 Bone 2i°Pb Max. 2.7 AW 29... 

Bearded seal Erignatus barbatus 0.48 wet major minor minor... 

Baikal seal, Phoca sibirica, 85,440,624 Bearded seal, Erignathus barbatus, 441 Grey seal, Halichoerus grypus, 440,441,625 Harbor seal, Phoca vitulina, 440,441,466,... 

If the oxygen content of the contaminated air is deficient (refer to page 72), breathing apparatus is essential. The degree of protection required is determined by the level of contamination, the hygiene standard for the contaminant(s), the efficiency of any filter or adsorber available, and the efficiency with which the facepiece of the device seals to the user s face (this is reduced by beards, spectacles etc.). The level of comfort and user acceptability are further considerations. 

The garments used in clean areas shall be smooth, free from static charge, and shedding no fibres and particulate matters. They shall be loose and comfortable, fabric edges shall be sewed up and seams, sealed on the inside, and there shall be no unnecessary tucks and belts. The hair, beard and feet shall be completely enclosed by garments of the aseptic area, and the particles shed by the body shall also be retained. 

Full-face masks (Fig. 6.28) include protection of the eyes, as they completely enclose the face. They are excellently suitable for use with ambient air-indep>en-dent respiratory devices. Because the sealing line runs from the forehead, over the cheeks, and down below the chin, leak problems may occur with persons with a beard. This could be a prohibiting factor for this group of persons. The... 

Facial hair located along the sealing surface of the facepiece may prevent a satisfactory seal between the mask and skin. Even a few days growth of facial hair will allow contaminant penetration inside the respiratm. For this reason, beards are prohibited in petrochemical and refining sites. 

Respirators thatpurify the airby filtering require a snug fit to the face to ensure that they are effective. Unfortunately, as a person works, the contact may be temporarily broken and the protection provided by the mask diminished. Facial hair will prevent a good seal, so that bearded workers cannot be allowed to use respirators requiring a good facial seal for protection. Some... 

The half-face cartridge respiratoris the type most frequently used, especially in atmospheres in which there is little or no problem of irritation or absorption ofmaterialthrough the skin. The facepiece of most of these units is molded ofa flexible plastic orsilicone rubber, which provides a seal to the face when properly adjusted. As noted earlier, facialhair between the mask and the face will prevent the seal from being effective, and it is not permitted for a person with a beard or extended sideburns in the area of the seal to be fitted with a respirator. Accommodation for individuals who wear glasses also must not break the seal to the face. The facepieces of most... 

Thetestshallnotbe conducted ifthere is any hair growth between the skin and the facepiece sealing surface, such as stubble beard growth, beard, mustache, or sideburns which cross the respirator sealing surface. Any type of apparel that interferes with a satisfactory fit shall be altered or removed. 

Earmuffs require a perfect seal around the ear (see Figure 24.10). Glasses, long sideburns, long hair, and facial movements such as chewing may reduce the protective value of earmuffs. It is possible to purchase special earmuffs designed for use with eyeglasses or beards. 

Tight-fitting facepiece respirators must not be worn by employees who have facial hair that comes between the sealing surface of the facepiece and the face or that interferes with valve function. Respirators that do not rely on a tight face seal, such as hoods or helmets, may be used by bearded individuals. 

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