Record Display for the EPA National Library Catalog


Main Title Summary of the 1983 EPA (Environmental Protection Agency) National Performance Audit Program on Source Measurements.
Author Streib, E.W. ; Logan, T. J. ; Midgett, M. R. ;
CORP Author Environmental Monitoring Systems Lab., Research Triangle Park, NC. Quality Assurance Div.
Year Published 1985
Report Number EPA/600/4-80/004;
Stock Number PB85-165025
Additional Subjects Auditing ; Air pollution ; Quality assurance ; Gas analysis ; Laboratories ; Sources ; Chemical analysis ; Sampling ; Calibrating ; Combustion products ; Industrial wastes ; Performance evaluation ; Comparison ; Coal ; Sulfur dioxide ; Nitrogen oxides ; Carbon dioxide ; Oxygen ; National performance audit program ; Air pollution detection ; Air pollution sampling ; EPA method 5 ; EPA method 6 ; EPA method 7 ; EPA method 3 ; EPA method 19A
Library Call Number Additional Info Location Last
NTIS  PB85-165025 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 47p
In the spring and fall of 1983, the Quality Assurance Division conducted the National Audits for Stationary Source Test Methods. The audit materials consisted of: a calibrated orifice for Method 5 (dry gas meter only), five simulated liquid samples each for Method 6 (SO2) and Method 7 (NOx), two coal samples for Method 19A, and a disposable gas cylinder for Method 3 (Orsat analyzer). Participating laboratories sent their data to the Source Branch and in return received a written report comparing their results to EPA's. In the Method 5 spring audit, the mean value for all participants differed by 5.7% from the true (EPA) value. For the fall audit, the participants' mean was 4.1% from the true value. In the two Method 6 audits, the average mean differed by 3% from the expected value. The average mean in the two Method 7 audits was 15% from the expected value. In the two coal audits, the parameters measured were sulfur, moisture, ash, and Btu. On the average for the sulfur analysis 85% of the participants measured within 10% of the expected value; for Btu 100% of the participants measured within 10% of the expected value. In the two Method 3 audits, each parameter had only one concentration. The means for CO2 were within 10% (spring) and 6% (fall) from the expected value. For both audits, the mean for O2 was less than 1%.