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Environmental Technology Verification Report for Applikon MARGA Semi-Continuous Ambient Air Monitoring System
Citation:
Cowen, K., A. Dindal, J. McKernan, AND M. Henderson. Environmental Technology Verification Report for Applikon MARGA Semi-Continuous Ambient Air Monitoring System. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/083, 2009.
Impact/Purpose:
To inform
Description:
The verification test was conducted oer a period of 30 days (October 1 to October 31, 2008) and involved the continuous operation of duplicate semi-continuous monitoring technologies at the Burdens Creek Air Monitoring Site, an existing ambient-air monitoring station located near EPA laboratories in Research Triangle Park, North Carolina. The MARGA ADI 2080 is an on-line analyzer for semi-continuous measurement of gases and soluble ions in aerosols. Duplicate, integrated denuder/filter pack reference samples were collected over 12-hour sampling intervals throughout the testing period, from 6:00 am to 6:00 pm and from 6:00 pm to 6:00 am daily. The accuracy of the monitoring technology was determined through comparisons to modified EPA reference methods for individual gaseous and particulate species. Modifications to the reference methods consisted primarily of increasing the sampling flow rate from 3 L/min, as used in the Clean Air Status and Trends Network (CASTNet), to 10 L/min to reduce overall sampling times and and help minimize measurement bias and uncertainties, while still meeting the data quality objectives of this verification test.
URLs/Downloads:
ETV REPORT FOR APPLIKON MARGA SEMI-CONTINUOUS AMBIENT AIR MONITORING SYSTEMURL.PDF (PDF, NA pp, 24 KB, about PDF)
ETV Website
Verification Statement