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breathing apparatus shall be worn. Air purifying respirators <br /> shall be worn only when the contaminant Is known and, the levels <br /> of contamination in ppm Is measured using a Draeger air <br /> sampling pump with appropriate sampling tube and, the measured <br /> levels of contamination do not exceed the limitations posted <br /> on the appropriate cartridge and, the measured levels of <br /> contamination do not exceed the American Conference of Govern- <br /> mental Industrial Hygienists (AGCIH) Threshold Limit Valve <br /> (TLV) or Time Weight Allowance (TWA) of the contaminant times <br /> the protection factor (PF) of the air purifying respirator. <br /> Scott has established a PF of 100 for the Scott-O-Vista face- <br /> piece, TEC shall use a PF of 50. An air supplied line <br /> breather may be used when the contaminant levels exceed those <br /> for an air purifying respirator but the contaminated area <br /> is not an IDLH atmosphere. At any time the levels of <br /> contamination cannot be determined an SCBA shall be used. <br /> All air purifying cartridges shall be disposed of daily <br /> and/or when breakthrough Is detected whichever occurs first. <br /> Air purifying respirators shall be worn for nuisance dusts, <br /> mists, and particles but shall not be worn when the odor <br /> threshold is above the TLV. <br /> LIMITATIONS; <br /> Air purifying respirators are not capable of supplying oxygen <br /> so cannot be used in an atmosphere of less than 19.5% oxygen. <br /> The use of air purifying respirators is limited to <br /> concentrations of contaminants posted on the cartridge <br /> or 50 times the PF whichever is less. Air supplied line <br /> breathers cannot be used in IDLH atmospheres without <br /> the use of an approved emergency egress system. No <br /> respiratory protection device can be used if an adequate <br /> face seal cannot be attained. No one can wear a respirator <br /> while wearing a beard, sideburns or any device such as eye <br /> glasses that could interfere with the face seal. Dentures <br /> and facial scars must also be considered. No one can wear <br /> contact lenses while wearing a respirator. <br /> RECORDS: <br /> Records shall be maintained by the safety officer of <br /> all Inspections and repairs of respiratory protective <br /> equipment. Any exposures experienced by employees whether <br /> or not wearing respiratory protective equipment shall be <br /> recorded and maintained by the safety officer. These records <br /> will be made available to the Occupation Health Physician. <br /> Personal records are available for review by each respective <br /> employee. <br /> 6 - <br />