EPA chief: 'We will be fully accountable' for toxic spill

August 12, 2015 9:34 PM

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She said both internal and independent reviews of the incident are underway and mine remediation operations throughout the country are being scrutinized to ensure they are being safely performed.

She said the waters in La Plata County, Colo., have returned to pre-incident safety levels, and EPA staff are at Lake Powell in Arizona to monitor the impact as the plume of pollution arrives there.

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