||Accuracy and reliability of CEMS Subpart Da (electric utilities) facilities
Walsh, George. ;
||Entropy Environmentalists, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
||U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory,
Continuous sampling ;
Steam electric power generation ;
Quality assurance ;
Site surveys ;
Sulfur dioxide ;
Nitrogen oxides ;
Data processing ;
Performance standards ;
New Source Performance Standard ;
Air pollution monitors ;
Data assessment reports
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
EPA promulgated minimum quality assurance (QA) requirements for Continuous Emission Monitoring Systems (CEMS) in 40 CFR Part 60 Appendix F. Appendix F requires Da source owners to develop site-specific QA plans and report the results of EPA specified QA activities each calendar quarter. The first calendar quarter for which a report was to be submitted is January through March 1988. The report of QA activities under Appendix F is called a Data Assessment Report (DAR). The DAR includes identifying and descriptive information for the CEMS, results of periodic audits, identification of periods when calibration drift exceeds specific criteria, identification of periods when the analyzers of CEMS are out of control (OOC), and descriptions of corrective actions in response to OOC conditions. An OOC period occurs when an analyzer or a CEMS fails to meet criteria specified in Appendix F. The criteria are expressed in terms of CEMS relative accuracy, analyzer accuracy, and analyzer drift. The principle objective of the study is an evaluation of the information in DARs for six quarters from January 1988 through June 1989. Secondary study objectives include the establishment of contacts with agency staff who normally receive the DARs each quarter and identification of facilities for which DARs were apparently not received, for follow-up by the appropriate agency.
"EPA/600/S3-90/056." "Aug. 1990."