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• Each regulator will be inspected and tested: <br />• Check that mainline and bypass valves are <br />closed <br />• Check that air outlet (exhaust) is not blocked <br />• Check positive pressure function (with system <br />connected to air supply): cover regulator <br />outlet with palm of hand, open mainline valve,' <br />and confirm stoppage of air flow after positive <br />pressure builds; close mainline valve <br />• Check regulator for leaks: blow air into outlet <br />5-10 seconds, then draw air from outlet 5-10 <br />seconds. Regulator is defective if either <br />positive pressure or vacuum can not be <br />maintained. <br />• Inspect facepiece/mask straps for damage <br />• Inspect exhalation valves (mask/facepiece) for dirt <br />or damage <br />• Conduct mask/facepiece negative pressure test <br />A person will be stationed at the closest safe <br />atmosphere point (e.g., at the entry to the hazardous <br />atmosphere area). This person will be responsible for <br />monitoring work activities, worker safety, and for <br />managing air lines entering the work area (i.e., <br />preventing kinking; preventing lines from rubbing <br />against rough or sharp surfaces. <br />A person will be stationed, at all times during work <br />activities, at the air supply unit. The function of <br />this person is to assure that air supplies do not get <br />low (supply from cylinders), or to keep the supply <br />system functioning (compressor). <br />c. Care: After use, the respirator mask/facepiece will be <br />removed and thoroughly cleaned with either a mild <br />detergent and disinfection solution, or a proprietary <br />cleaning agent. The exhalation valve assembly will be <br />disassembled and cleaned, and the entire inside and <br />face seal surface of the mask/facepiece will be <br />meticulously cleaned. The respirator will then be <br />rinsed with clean water and allowed to dry. After <br />drying, the respirator will be re-assembled, inspected <br />for deterioration or damage, and then, if in <br />. acceptable condition, sealed inside a plastic bag or <br />other appropriate, sealable container, and placed into <br />storage. <br />