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Air Monitoring <br />This air monitoring plan is for assessment only during soil vapor sampling, in a controlled helium shroud. If any <br />subsurface activity is to be conducted at the landfill then methane becomes a constituent of interest and a 4-gas <br />meter will need to be added to the program. <br />There are no atmospheric chemical, radiological, or particulate hazards on this project requiring air monitoring. <br />Air monitoring is the responsibility of the client or subcontractor.