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Geosyntec consultants 6. DATA REVIEW AND REPORTING The following section identifies the data review, verification, validation, and reporting requirements for the project used to demonstrate that the data quality is sufficient to meet the project objectives. 6.1 Review of Field Monitoring Data Data measured by field instruments will be recorded on Daily Field Reports (DFRs), laptops, and/or on required field forms. Field data will be reviewed by the Field Operations Supervisor to evaluate completeness of the field records and appropriateness of the field methods employed. 6.2 Data Verification and Validation for Laboratory Data Laboratory data generated during this investigation will be subjected to a QA/QC review performed according to Geosyntec internal data quality control procedures. This review will include a verification of data completeness, correctness, and compliance to the project requirements as well as validation of the analytical quality of the data by accepting, qualifying, or rejecting data on the basis of sound criteria using established U.S. EPA guidelines and other applicable sources. Specifically, this QA/QC review will consist of the following: • Review of data package completeness and compliance with holding times and sample preservation requirements for each method; • Review of the Practical Quantitation Limits(PQLs)/RLs and/or Method Detection Limits(MDLs)achieved by each method to assess analytical sensitivity compared to project-specific requirements; • Evaluation of data accuracy based on surrogate recoveries; LCS and LCSD percent recoveries; and results of any method blanks, trip blanks, field blanks, and equipment blanks reported; • Evaluation of data precision based on LCS/LCSD and field duplicate sample/primary sample result RPDs; • Assessment of other QA/QC issues documented in the data deliverables; and • Application of standard data validation qualifiers to the data. Quality Assurance Project Plan 8 7 December 2020