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~ ~ Workers must leave the work area and replace <br />cartridges/canisters any time that breathing <br />resistance increases significantly (filter is <br />clogging). Workers must also leave the work area and <br />check the respirator fit, or replace <br />cartridges/canister, any time that contaminant odors <br />are detected inside the mask or facepiece (sorbent is <br />saturated or face seal is inadequate). <br />c. Care: After use, the respirator will be removed and <br />thoroughly cleaned with either a mild detergent and <br />disinfection solution, or a proprietary cleaning <br />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 (NOTE: <br />cartridges must not be wetted or exposed to cleaning <br />agents; removal before cleaning is advised). After <br />drying, the respirator will be re-assembled, insnected <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 />3. SUPPLIED AIR SYSTEMS <br />a. Fitting: Prior to entering a contaminated environment, users <br />will block the air hose to the facepiece/mask and <br />conduct a"negative pressure test" (see below) as <br />described in Appendix B.1. The mask/face piece will <br />be adjusted until an acceptable fit is attained. <br />b. Use: Prior to use, the respirator system will be thoroughly <br />inspected and tested. This procedure will include the <br />following: ~ <br />• The air supply system (cylinders or compressor) will <br />be inspected and tested to assure in working <br />condition; all filters will be inspected for <br />cleanliness, and all air fittings inspected/tested <br />for leakage. <br />• The entire length of each air line will be carefully <br />inspected for signs of deterioration, cuts, or <br />abrasion. Airlines will then be laid out for use in <br />a manner that prevents kinking as line is drawn into <br />the work area. <br />• Al1 fittings on each regulator will be checked for <br />tightness, and regulator-to-mask hoses checked for <br />damage <br />