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Measurement of total site mercury emissions from a chlor-alkali plant using ultraviolet differential optical absorption spectroscopy and cell room roof-vent monitoring
Authors:Eben D Thoma  Cary Secrest  Eric S Hall  Donna Lee Jones  Richard C Shores  Mark Modrak  Ram Hashmonay  Phil Norwood
Institution:1. U.S. Environmental Protection Agency, National Risk Management Research Laboratory, Mail Drop E343-02, 109 T. W. Alexander Drive, Research Triangle Park, NC 27711, USA;2. U.S. Environmental Protection Agency, Office of Enforcement and Compliance Assurance, Ariel Rios Bldg. Rm. 2119, 1200 Pennsylvania Avenue, NW, Washington, DC 20004, USA;3. U.S. Environmental Protection Agency, National Exposure Research Laboratory, Mail Drop E205-02, 109 T. W. Alexander Drive, Research Triangle Park, NC 27711, USA;4. U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Mail Drop D243-02, 109 T. W. Alexander Drive, Research Triangle Park, NC 27711, USA;5. ARCADIS Inc., 4915 Prospectus Drive, Suite F, Durham, NC 27713, USA;6. EC/R, 6330 Quadrangle Drive, Suite 325, Chapel Hill, NC 27517, USA;1. Silviculture and Forest Ecological Studies, Hokkaido University, Sapporo 060-8689, Japan;2. Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu 183-8509, Japan;3. Department of Plant Ecology, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan;4. Ecophysiology of Plants, Technische Universität München, Von-Carlowitz-Platz 2, D-85354 Freising, Germany;1. Animal Behavior Program, Bucknell University, Lewisburg, PA, U.S.A.;2. Psychology Department and Program in Linguistics, The Pennsylvania State University, University Park, PA, U.S.A.;3. Psychology Department, Bucknell University, Lewisburg, PA, U.S.A.;1. Ecophysiology of Plants, Department of Ecology and Ecosystem Management, Technische Universität München, Von-Carlowitz-Platz 2, 85354 Freising, Germany;2. Lehrstuhl für Grünlandlehre, Department of Plant Sciences, Technische Universität München, Alte Akademie 12, 85350 Freising, Germany;3. Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK;4. Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Biochemical Plant Pathology, Department of Environmental Engineering, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany;1. Natural Products Research Laboratories, Department of Biology, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland;2. Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, NO-1432 Ås, Norway
Abstract:This technical note describes a United States Environmental Protection Agency (U.S. EPA) measurement project to determine elemental mercury (Hg0) emissions from a mercury cell chlor-alkali (MCCA) facility in the southeastern U.S. during a 53-day monitoring campaign in the fall of 2006. The optical remote sensing (ORS) area source measurement method EPA OTM 10 was used to provide Hg0 flux data for the site. These results are reported and compared with cell room roof-vent monitoring data acquired by the facility for similar time periods. The 24-h extrapolated mercury emission rate estimates determined by the two monitoring approaches are shown to be similar with overall averages in the 400 g day?1 range with maximum values around 1200 g day?1. Results from the OTM 10 measurements, which include both cell room emissions and potential fugitive sources outside the cell room, are shown to be approximately 10% higher than cell room monitoring results indicating that fugitive emissions from outside the cell room produce a small but measurable effect for this site.
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