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LFR Levine-Fricke <br /> Method Blanks: Laboratory method blanks are used to assess laboratory contamination <br /> during performance of a method. Laboratory method blanks will be run at a minimum <br /> frequency of 1 per 20 samples or one per day. <br /> A2.2 Data Validation Procedures <br /> Data validation is performed on the project analytical data when the final analytical <br /> report is received by LFR. The data validation will include a data completeness review <br /> of each data package, and a review of QA/QC parameters as described in this appendix <br /> and as indicated in the National Functional Guidelines to ensure that all project <br /> analytical data are of reliable and comparable data quality. Specifically, the following <br /> QA/QC parameters will be reviewed: <br /> • holding times (to assess potential for degradation that will affect accuracy) <br /> • blanks (to assess contamination for all compounds) <br /> • MSs/MSDs or Laboratory Fortified Blanks (to assess accuracy of the methods and <br /> precision of the method relative to the specific sample matrix) <br /> • Internal Standards (to assess method accuracy and sensitivity) <br /> • Compound Quantitation Limits and Method Detection Limits (to assess sensitivity <br /> as compared to project-specific requirements) <br /> • Field Duplicate RPDs (to assess precision of the method relative to field sampling <br /> techniques, the specific sample matrix, and representativeness of the sample aliquot <br /> to the area sampled) <br /> The results of the data validation and any corrective actions implemented are recorded <br /> on a QA/QC worksheet. The data reviewer will initial and date the QA/QC worksheet. <br /> The Site Project Manager will provide secondary review of the QA/QC worksheet and <br /> will also initial and date the QA/QC worksheet. The initialed and dated QA/QC <br /> worksheet will be attached to the final analytical laboratory report that is retained in <br /> the project files. In addition, a summary of the data validation, included a list of all <br /> qualified data will be provided in the Site Investigation report. <br /> Page 8 Tracy-qV]y-samp-rpt-wrkpin(rmaq:7EE <br />