Environmental
In NJ, 'natural attenuation' as a remediation approach for a groundwater plume relies on:
APumping and treating all contaminated groundwater to the surface
BNatural physical, chemical, and biological processes (dilution, dispersion, biodegradation) to reduce contaminant concentrations without active intervention, subject to monitoring✓ Correct
COnly adding chemicals to the aquifer
DReplacing the contaminated groundwater with imported clean water
Explanation
Monitored Natural Attenuation (MNA) is a passive NJ DEP-approved remediation approach that relies on natural processes—biodegradation, dispersion, dilution, sorption—to reduce contaminant concentrations to acceptable levels, with ongoing monitoring to verify progress.
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