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EPA publishes final regional haze rule for Arizona

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World Cement,

The EPA has promulgated a final rule establishing new limits for emissions from six Arizona industrial facilities to reduce haze at 17 national parks and wilderness areas in the US. The rule aims to cut 32 000 tpa of pollutants from smelters, cement plants and a power plant to clear the air over federal lands in Arizona, California, Utah and New Mexico – including the Grand Canyon National Park.

Environmentalists welcomed the rule, but say it does not go far enough as not all industrial facilities have been included.

The Lhoist North America Nelson Lime Plant Kilns 1 and 2 is required to install Best Available Retrofit Technology (BART) controls to meet the lower emission standards for NOX, SO2 and particulate matter. The Phoenix Cement Clarkdale plant kiln 4 and the CalPortland Cement Rillito plant kiln 4 will be subject to ‘reasonable progress’ restrictions, which deal with NOX emissions only.

The new emission guidelines will take effect from 3 October and the companies will have until 2018 to comply.

The Federal Register notice includes further details of the rule. Those for the cement plants are copied below:

'Clarkdale Plant Kiln 4: Phoenix Cement Company (PCC) has two options for meeting the Reasonable Progress (RP) requirements. It can choose to meet either a lb/ton limit or tons/year limit for NOX. The final NOX limit for the first option is the proposed 2.12 lb/ton with a requirement for an SNCR optimization plan. The final lb/ton NOX limit is based on a 30-day rolling average consistent with SNCR as a control technology. The second option is an 810 tons/year NOX limit that is achievable by installing SNCR or maintaining clinker production at current levels. The 810 tons/year limit is based on a 12-month rolling average equivalent to a 50 percent reduction in baseline emissions. PCC must notify EPA of the option it has selected no later than July 2018 with a compliance deadline of December 31, 2018.

Rillito Plant Kiln 4: The final RP emission limit for NOX is 3.46 lb/ton based on a 35 percent control efficiency. We have increased the final limit from the proposed 2.67 lb/ton that was based on a 50 percent control efficiency in response to additional information from CalPortland Cement regarding constraints on efficiency due to the kiln design. In addition, we are requiring implementation of an SNCR optimization plan to determine if a higher control efficiency is achievable. The final NOX limit is based on a 30-day rolling average and is consistent with SNCR as a control technology. The compliance deadline is December 31, 2018, the same as proposed.'

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