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Required Monitoring Instruments, Action Levels and Monitoring Frequency <br />Air monitoring for volatile organics is not required. <br />Particulate monitoring is not required. Re-evaluate need for monitoring if visible dusts cannot be controlled. <br />Action levels are in mg/m3 <br />< Continue working <br />Levels sustained > 5 minutes, monitor continuously and review engineering controls <br />and PPE. Proceed with caution. <br />> Stop work and contact SSO <br />LEL/02 monitoring is required. <br />LEL/02 Meter <br />0-5% LEL Continue work <br />>5-10% LEL Continually monitor, review engineering controls, proceed with caution <br />>10% LEL Stop work, evacuate, contact SSO <br />19.5%-23.5% 02 Normal, continue work <br /><19.5% 02 102 deficient, stop work, evacuate, contact SSO <br />>23.5% 02 102 enriched, stop work, evacuate, contact SSO <br />All air -monitoring instruments must be calibration checked daily, if used, per manufacturer's instructions. Calibration <br />checks, including calibration gases used, must be documented. <br />Breathing zone air monitoring using the above instruments will be performed at the following frequency: <br />Hourly <br />If manually logging air monitoring results, all results must be documented, including non -detects. <br />Compound specific monitoring is not required. <br />Indicator: <_TWA lContinue work <br />Tube nChip >TWA IStop work, review engineering controls and PPE, contact SSO <br />Compound(s): <br />Indicator tube/chip monitoring frequency: Not applicable <br />• <br />0 <br />