For Star subscribers: Tucson Electric Power has proposed voluntary pollution limits at its local power plant, but environmentalists are skeptical.
David Wichner Tucson Electric Power is seeking to set pollution limits for one gas-fired generator at its power plant on East Irvington Road to reflect a planned shift to seasonal use.
TEP's proposed new NOx limits would go into effect one year after the U.S. Environmental Protection Agency approves the Arizona Department of Environmental Quality’s still-pending regional haze reduction plan. The TEP proposal, if approved, would be adopted as part of the state’s formal implementation plan.
The proposal to limit operations at the Irvington plant is consistent with other efforts, he said, including the 2019 installation of 10 quick-starting, gas-fired reciprocating internal combustion engines at the Irvington plant to quickly supplement the intermittent power generation from renewables.
In February, the Sierra Club and the National Parks Conservation Association filed comments with ADEQ, urging the agency to reject TEP’s Springerville permit revision as premature, saying it “improperly assumes the outcome" of Arizona’s regional haze plan before ADEQ, the EPA and stakeholders can fully scrutinize and formally comment on a complete regional analysis.
The plant also has another steam generator, Unit 4, rated at 156MW and two smaller gas turbine generators.
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