What is 'produced water' and what is the primary federal regulatory concern for its disposal onshore?
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A
Freshwater injected during hydraulic fracturing; regulated under SDWA Class II UIC wells
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B
Water co-produced with oil and gas from the reservoir; regulated primarily under SDWA Class II UIC disposal well rules and state programs
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C
Municipal wastewater generated at remote field camps; regulated under NPDES permits
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D
Rainwater collected in reserve pits; exempt from all federal regulation