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x Table 7 1 b Monitoring; A� Sn� C [lection and Analysis ` ' } <br /> „ - <br /> , a <br /> Task/ Substance(s)/ Monitoring Type of Monitoring Monitoring Monitoring Exposure Required Action <br /> Operation Hazard(s) Location (separate lines for Method Frequency Limits (must be consistent <br /> each type, see Pick with Chapter 6, PPE) <br /> List at end of chapter) <br /> Soil Methane Gas Each Air Explosive Throughout 10% LEL Terminate Excavation <br /> Excavation Excavation Gas Excavation <br /> Detection Activities <br /> Device <br /> Ionizing Radiation Each Air Meter Throughout *>2 Terminate Excavation <br /> Radiation Excavation Excavation mrem/hr <br /> Activities <br /> Chapter <br /> 7 - <br /> Chapter 7 - 5 <br />