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s <br /> Table 7=1a MonI briing ®tract Reading alnstrumentatlon <br /> LY <br /> Task/Operation Substance(s)/ Monitoring Direct Reading Frequency of Action Level Required Action <br /> Hazard(s) Location Instrument and Monitoring <br /> Response Factor (see Chapter 6) <br /> (see Pick Lists at end of <br /> this chapter) <br /> Soil excavation Methane Gas Each excavated 0-100 LEL Periodically 10% LEL Terminate Excavation <br /> hole during <br /> excavations <br /> Soil excavation alpha, beta, and Each excavated RAD Periodically *>2 Terminate Excavation <br /> gamma radiation hole meter during <br /> inrerri/hr <br /> excavations <br /> Cha <br /> ha [*Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities. Action Limits may also be <br /> pte7 - 3 r determined based on the specific substances present and the monitoring equipment used for detection. Although <br /> individual chemical specific action limits may be calculated, when using non-specific direct reading equipment, one overall <br /> action limit should be defined for that piece of equipment and applied to each of the hazardous substances monitored <br /> with that piece of equipment.] <br />