Evaluation of Alternatives to the Ontario Hydro Method as a Reference Method for CAMR

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In June 2005, the U.S. Environmental Protection Agency (EPA) finalized the Clean Air Mercury Rule (CAMR). As part of the rule, all coal-fired power plants will be required to do continuous mercury measurements. To complete the required relative accuracy test assessment (RATA), the only reference methods allowed are the wet-chemistry methods: the Ontario Hydro (OH) mercury speciation method (ASTM International D6784-02) and EPA Method 29. Either method will be a challenge and expensive. It would be much more desirable to use an instrumental reference method (IRM) or use sorbent traps as a reference method so that the results can be ... continued below

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Laudal, Dennis L. March 31, 2007.

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Description

In June 2005, the U.S. Environmental Protection Agency (EPA) finalized the Clean Air Mercury Rule (CAMR). As part of the rule, all coal-fired power plants will be required to do continuous mercury measurements. To complete the required relative accuracy test assessment (RATA), the only reference methods allowed are the wet-chemistry methods: the Ontario Hydro (OH) mercury speciation method (ASTM International D6784-02) and EPA Method 29. Either method will be a challenge and expensive. It would be much more desirable to use an instrumental reference method (IRM) or use sorbent traps as a reference method so that the results can be obtained quickly and cheaply. This report presents the results from testing at Reliant Energy, Inc.'s, Portland Station. The project was designed to compare mercury concentrations measured using sorbent traps to those obtained using the OH method. The tests were done using a RATA scenario and at three different conditions. In addition, as part of the project, limited IRM testing was also completed. The results from the testing show that the sorbent traps compared very well with the OH method and, therefore, must be considered as a potential reference method. Although the IRM testing using manual injection of elemental and oxidized mercury for dynamic spiking showed some promise, it was clear that additional testing was needed. However, this method of dynamic spiking may not be acceptable to EPA, as it does not consider vapor pressure curves for elemental mercury a National Institute of Standards Technology traceable standard.

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  • Report No.: None
  • Grant Number: FC26-98FT40321
  • DOI: 10.2172/920022 | External Link
  • Office of Scientific & Technical Information Report Number: 920022
  • Archival Resource Key: ark:/67531/metadc900807

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Creation Date

  • March 31, 2007

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

Description Last Updated

  • Feb. 17, 2017, 5:41 p.m.

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Laudal, Dennis L. Evaluation of Alternatives to the Ontario Hydro Method as a Reference Method for CAMR, report, March 31, 2007; [Grand Forks, North Dakota]. (digital.library.unt.edu/ark:/67531/metadc900807/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.