Environmental
Natural attenuation as a brownfield remediation strategy in Indiana means:
APhysically removing contaminated soil
BAllowing natural biological, chemical, and physical processes to reduce contamination levels over time with monitoring✓ Correct
CImmediately excavating all contaminated material
DInstalling pump-and-treat systems for groundwater
Explanation
Monitored natural attenuation (MNA) relies on natural processes — biodegradation, dispersion, dilution, and chemical transformation — to reduce contamination to acceptable levels. It is a cost-effective remedy where appropriate.
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