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Alternate Method 25Z for Accurate VOC Emission Measurements
Oral Presentation
Prepared by C. Simon1, W. Stollings2
1 - VOC Reporting, Inc., 14260 W. Newberry Rd., No. 136, Newberry, FL, 32669
2 - Triangle Environmental Services, Inc., PO Box 13294, Research Triangle Park, NC, 27709
Contact Information: cgsimon@gowebway.com; 352-472-2899
ABSTRACT
How is your facility classified? Major Source? True Minor Source? Correctly permitted Synthetic Minor Source? When did/will your facility exceed a PSD increment? These are some pretty important questions for both operators and regulators. The accuracy of emission test results cannot be understated since they provide the answers to these critical questions. Determining accurate emission rates of Volatile Organic Compounds (VOC) has historically been the most difficult of the criteria pollutant source emission tests. Method 25 has been used since 1980 to define the organic carbon emission rates of a broad spectrum of industrial sources. After collecting and analyzing thousands of Method 25 samples, the authors are in the unique position to provide an update to this Method that substantially improves its accuracy in extreme, non-traditional, applications. The prescriptive nature of the original Method 25 is altered to include a selection of modifications appropriate for each source category. These changes define equipment cleaning, quality assurance and audit sample collection procedures; remove interference from carbon dioxide; permit accurate determination of VOC emissions in a host of non-traditional sources including those with ultra-high VOC concentration (>1,000,000 ppmC), those with aerosolized VOC and organic-laden droplets, and even steam vents! Modifications to laboratory procedures assure complete recovery of organic compounds that are collected in the cryogenic trap, even thermally reactive compounds.
Oral Presentation
Prepared by C. Simon1, W. Stollings2
1 - VOC Reporting, Inc., 14260 W. Newberry Rd., No. 136, Newberry, FL, 32669
2 - Triangle Environmental Services, Inc., PO Box 13294, Research Triangle Park, NC, 27709
Contact Information: cgsimon@gowebway.com; 352-472-2899
ABSTRACT
How is your facility classified? Major Source? True Minor Source? Correctly permitted Synthetic Minor Source? When did/will your facility exceed a PSD increment? These are some pretty important questions for both operators and regulators. The accuracy of emission test results cannot be understated since they provide the answers to these critical questions. Determining accurate emission rates of Volatile Organic Compounds (VOC) has historically been the most difficult of the criteria pollutant source emission tests. Method 25 has been used since 1980 to define the organic carbon emission rates of a broad spectrum of industrial sources. After collecting and analyzing thousands of Method 25 samples, the authors are in the unique position to provide an update to this Method that substantially improves its accuracy in extreme, non-traditional, applications. The prescriptive nature of the original Method 25 is altered to include a selection of modifications appropriate for each source category. These changes define equipment cleaning, quality assurance and audit sample collection procedures; remove interference from carbon dioxide; permit accurate determination of VOC emissions in a host of non-traditional sources including those with ultra-high VOC concentration (>1,000,000 ppmC), those with aerosolized VOC and organic-laden droplets, and even steam vents! Modifications to laboratory procedures assure complete recovery of organic compounds that are collected in the cryogenic trap, even thermally reactive compounds.