Environmental

In Kansas, former dry-cleaning operations are a major source of what type of groundwater contamination?

ANitrates from cleaning solvents
BChlorinated solvents (PCE/PERC, TCE) that are dense non-aqueous phase liquids (DNAPLs) that sink into aquifers and are difficult to remediate✓ Correct
CPetroleum hydrocarbons from cleaning equipment
DAmmonia compounds from dry-cleaning chemicals

Explanation

Dry cleaners typically used PCE (tetrachloroethylene/perchloroethylene) and TCE (trichloroethylene) — chlorinated solvents that are dense non-aqueous phase liquids (DNAPLs). These sink below the water table and are extremely difficult and expensive to remediate.

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