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670 8-hour HAZWOPER Refresher for Cleanup Operations
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On-site Survey Monitoring

  • If necessary, use one or more of the following remote sensing or subsurface investigative methods to locate buried wastes or contaminant plumes:
    • electromagnetic resistivity
    • seismic refraction
    • magnetometry
    • metal detection
    • ground-penetrating radar
  • Note any indicators of potential exposure to hazardous substances:
    • dead fish, animals or vegetation
    • dust or spray in the air
    • fissures or cracks in solid surfaces that expose deep waste layers
    • pools of liquid
    • foams or oils on liquid surfaces
    • gas generation or effervescence
    • deteriorating containers
    • cleared land areas or possible landfilled areas

Knowledge Check Choose the best answer for the question.

8-5. What is one of the remote sensing or subsurface investigative methods used to locate buried waste or contaminant plumes?