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Action Levels <br />Total Organic Vapors Where Specific Potential Air Contaminants are Unknown <br />Normal Background Levels <br />= Level D protection <br />Above Background Levels <br />>0 to 5 ppm <br />Level C protection <br />Level B <br />>5 to 500 ppm <br />protection <br />>500 ppm <br />= Stop work; evacuate site; call CLEAN <br />Health and Safety Program Manager. <br />Total Particulates <br />r< <br />5 mg/M3 <br />= Level D <br />5 to 10 mg/M3 <br />= Level C, respirators equipped with NEPA <br />filters <br />> 10 mg/M3 <br />_ <br />— Level B <br />Oxygen Depletion <br />20.8% <br />= Normal background level <br />20.8 to 19.5% <br />= Continue investigation with continuous <br />monitoring <br /><19.5% <br />= Use Level B; call CLEAN Health and Safety <br />Program Manager <br />' <br />Explosive Atmospheres <br />' <br />0 to 10% LEL <br />= Normal background levels <br />> 10% LEL <br />= Stop work; evacuate site; call CLEAN <br />Health and Safety Program Manager <br />* Level B work is not anticipated in this project. <br />Training Requirements: <br />Personnel will (1) have completed 40 hours of formal training off-site prior to site entry, <br />(2) a minimum of 3 days of actual <br />field experience on-site under the supervision of a trained and <br />experienced supervisor, and (3) be medically cleared to wear a respirator (if applicable). <br />Additionally, managers and supervisors will have completed an additional 8 -hour health and <br />safety supervisor training course. <br />All training will be in accordance with 29 CFR 1910.120(e). <br />A-16 <br />