Environmental
Chlorinated solvents (like TCE and PCE) used by dry cleaners and industrial facilities are significant environmental concerns because:
AThey cause only skin irritation
BThey are dense non-aqueous phase liquids (DNAPLs) that sink in groundwater and are persistent, carcinogenic contaminants✓ Correct
CThey evaporate harmlessly within 30 days
DThey are regulated only for agricultural land
Explanation
Chlorinated solvents (TCE, PCE, TCA) are dense non-aqueous phase liquids (DNAPLs) that sink below the water table, are very persistent, and are known or probable human carcinogens. They are among the most common and challenging groundwater contaminants.
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