VERIFYING APPROPRIATE USE OF A METHOD WITHIN A PERFORMANCE-BASED FRAMEWORK
Regulatory monitoring methods are currently prescribed, by in large, by USEPA. A performance-based approach to methods has been suggested as a better means for ensuring improved water information in a variety of monitoring programs in the U.S. One obstacle to implementing a performance-based approach is identifying laboratory requirements that verify appropriate use of a new or modified method. To address this issue, the national Methods and Data Comparability Board coordinated seven laboratories (federal, state, and private entities) that generated data using both the currently approved chemical oxygen demand (COD) method and a new COD method that does not include the use of hazardous chemicals. Results were subjected to two approaches: (a) comparability of the new method to measurement quality objectives (MQO), and (b) comparability of new method data to approved method data. Results of this pilot indicated that most labs could obtain reasonable data using laboratory reagent water but performance was poorer for both methods using actual effluent samples. Several labs could meet the target MQOs using the approved (reference) method but only one lab met the MQOs using the new method. Different labs had acceptable results depending on the type of comparability approach examined. For some labs, the reference method approach could yield a false sense of acceptable method performance. We observed that the use of sample matrix spikes is critical to achieving accurate performance information, regardless of the comparability approach used, and that laboratory verification of a method can be achieved with reasonable effort.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2002-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites