SAM Chemical Methods Query
Chemicals Radiochemicals Pathogens Biotoxins
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See: Selected Analytical Methods for Environmental Remediation and Recovery (SAM) - 2012.
The fitness of a method for an intended use is related to site-specific data quality objectives (DQOs) for a particular environmental remediation activity. The selected chemistry methods in SAM have been assigned tiers (defined below) to indicate a level of method usability for the specific analytes and sample type. See SAM 2012 Appendix A: Selected Chemical Methods for analyte/sample type specific method usability tiers. The assigned tiers reflect the conservative view for DQOs involving timely implementation of methods for analysis of a high number of samples (such that multiple laboratories are necessary), low limits of identification and quantification and appropriate quality control:
Tier I: Analyte / sample type is a target of the method(s). Data available for all aspects of method performance and quality control measures supporting its use for analysis of environmental samples following a contamination event. Evaluation and/or use of the method(s) in multiple laboratories indicate that the methods(s) can be implemented with no additional modifications for the analyte / sample types.
Tier II: (1) The analyte / sample type is a target of the method(s) and the method(s) has been evaluated for the analyte / sample type by one or more laboratories, or (2) the analyte / sample type is not a target of the method(s), but the method has been used by laboratories to address the analyte / sample type. In either case, available data and/or information indicate that modifications will likely be needed for use of the method(s) to address the analyte / sample type.
Tier III: The analyte / sample type is not a target of the method(s), and/or no reliable data supporting the method's fitness for intended use are available. Data from other analytes or sample types, however, suggest that the method(s), with significant modification, may be applicable.