Environmental

Oklahoma's Tar Creek Superfund site in Ottawa County represents one of the most contaminated areas in the nation due to:

AAgricultural chemical runoff
BHistoric lead and zinc mining operations that left millions of tons of toxic 'chat' piles, contaminating soil and groundwater with lead, cadmium, and other heavy metals✓ Correct
COil refinery operations
DNuclear waste disposal

Explanation

The Tar Creek Superfund site in northeastern Oklahoma's former Tri-State Mining District contains massive chat piles (mining waste) heavily contaminated with lead, zinc, and cadmium. The site has caused significant environmental and public health issues, affecting local real estate values and land use.

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