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errors before field and laboratory personnel report the data. Outliers can result from improper <br />sampling or analytical methodology, matrix interferences, data transcription errors, or calculation <br />errors, or may be the result of real variability in sample chemistry. Outliers that result from <br />errors found during data verification will be identified and corrected; those that cannot be <br />attributed to analytical, calculation, or transcription errors will be reported in the case narrative <br />section of the analytical report. Additional verification methods for field and laboratory <br />activities and procedures for review and validation of analytical data are described in the <br />following sections. Separate from outliers, is the validation criteria which indicates areas of <br />laboratory and matrix precision, accuracy and contamination. These are noted below. <br />Field Data Verification <br />Project team personnel will validate field data through reviews of data sets to identify <br />inconsistencies or anomalous values. Inconsistencies discovered are resolved immediately, if <br />possible, by seeking clarification from the field personnel responsible for data collection. Field <br />personnel are familiar with field instrument operations manuals and calibration procedures to <br />ensure instrumentation is in proper working and operating condition. All field personnel will be <br />responsible for following the sampling and documentation procedures described in the SAP so <br />that defensible and justifiable data will be obtained. <br />Laboratory Verification of Data <br />Laboratory personnel verify analytical data at the time of analysis and reporting by reviewing <br />raw data for nonconformance with analytical methods requirement. Detailed procedures for <br />laboratory verification and corrective action are provided in the laboratory issued QA plan. <br />Analytical Data Validation <br />Organic and inorganic analytical data will be validated according to protocols developed from <br />method-specific criteria and USEPA guidelines. For organics, analytical data will be validated <br />in general accordance with National Functional Guidelines for Organics Methods Data Review, <br />(OSWER 9240.1-46, USEPA-540-R-07-003, July 2007) or 1999 revision as applicable to the <br />method requested. Inorganic analytical data and cursory level radiochemistry will be validated <br />in general accordance with USEPA National Functional Guidelines for Inorganic Review, <br />(OSWER 9240.1-45, EPA 540-R-04-004, October 2004). Radiological data are reviewed in <br />general accordance with requested EPA criteria as a basis for review of fully validated data. <br />Data validation procedures are described in the SOPS. The project radiation safety officer <br />reviews radiological data and as necessary, interacts with laboratory personnel to resolve issues <br />that may impact completeness and/or quality of radiological data. <br />April 2009 20 Site Characterization Plan