Oklahoma Gas & Electric, in a March 16 fuel report filed at the Arkansas Public Service Commission, touched on its plan to comply with the federal Mercury and Air Toxics Standards (MATS), due to take initial effect on April 16 of this year.
“Compliance is required by April 16, 2015 unless extended for one year by the state environmental regulatory agency,” said the filing. “OG&E requested and has received a one-year extension for compliance to April 16, 2016 from the Oklahoma Department of Environmental Quality. OG&E plans to comply with MATS by installing activated carbon injection (‘ACI’) at five coal-fired units. The cost of installing ACI on all five of OG&E’s coal units is estimated to be $24 million. OG&E does not believe any retrofits are necessary at its five coal-fired generating units to comply with the particulate matter and acid gas emission limits.
“Because of the relatively low cost of the ACI systems and the three-year difference in the compliance timeframes for MATS and Regional Haze, OG&E determined that installing ACI at the five coal-fired units was the least-cost choice irrespective of a subsequent decision with respect to its coal units under the Regional Haze compliance plan. In order to comply with the April 16, 2016 MATS compliance deadline, OG&E has begun the engineering and design process to support ACI installation and is currently scheduled to finish the construction and installation by January 2016.”
The fling added about the haze plan and EPA’s Federal Implementation Plan (FIP) for Oklahoma: “OG&E has modeled several scenarios that would meet the Regional Haze FIP SO2 emission limits, including scrubbing all four affected units, converting or replacing all such units to natural gas and a combination of scrubbing and conversion/replacement. OG&E has already taken certain actions to address these existing requirements by installing emission control equipment at eight of its units. Specifically, OG&E is installing low NOx burners at seven units (Muskogee 4 & 5, Sooner 1 & 2, and Seminole 1, 2 & 3) and ACI at its five coal-fired units.”
The five coal units are:
- Muskogee 4, installed in 1977, 491 MW;
- Muskogee 5, installed 1978, 506 MW;
- Muskogee 6, installed 1984, 500 MW;
- Sooner 1, installed 1979, 520 MW; and
- Sooner 2, installed 1980, 521 MW