Frequent Questions

Why didn't EPA establish more stringent 'beyond-the-floor' Hazardous Waste Combustion Emission Standards for incinerators and cement kilns based on activated carbon injection?

The 47 ug/dscm for LWAKs is a floor level, based on current emission levels, as are the other two standards for incinerators and cement kilns. We evaluated the cost-effectiveness of lower, beyond-the-floor standards for incinerators and cement kilns based on both activated carbon injection and feedrate control of mercury. Although we conclude that feedrate control is more cost-effective than activated carbon injection, feedrate-based beyond-the-floor standards are not cost-effective for incinerators and cement kilns at $10 million and $11 million per megagram of mercury removed, respectively.

For more information, see http://www.epa.gov/wastes/hazard/tsd/td/combustion.htm.

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