According to Greenwire (April 14, 2010), McCarthy gave assurances best available control technology standards for major GHG emitters would require only efficiency upgrades, not fuel switching from coal to gas.

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Effective July 1, 2011, any new source of greenhouse gas emissions that exceeds 100, 000 tons of CO2 per year or plant modification adding 75, 000 tons annually, will be subject to permit approval based upon undefined case-by-case "best available control technology" assessments.

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