What is 'in situ' remediation and why is it often preferred over 'ex situ' approaches?
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A
In situ means treating contamination after excavation and transport to a licensed treatment facility
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B
In situ means treating contamination in place without excavation, which reduces cost, site disturbance, and exposure risks during cleanup
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C
In situ refers to biological remediation only, while ex situ refers to chemical treatment
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D
In situ remediation is a laboratory analysis technique, not an actual cleanup method