2024-01-31_REVISION - M1977344 (30)

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5-1 Section 5 Data Validation Water quality monitoring results will be reviewed as they are received from the laboratory, and a QC evaluation with data validation will be completed within 4 weeks of receipt of the data. Information generated by the monitoring program will be compiled in an updated Access-compatible database. The data will be validated in general accordance with United States Environmental Protection Agency (USEPA) Contract Laboratory Program National Functional Guidelines for Inorganic Superfund Data Review (USEPA 2010). All data from the investigation will be subjected to a QC analysis, including the following components: • A review to verify that laboratory sample IDs match sample IDs on the COC forms. Discrepancies will be noted and corrected. • A review to verify that receiving temperatures are in accordance with preservation requirements specified in the QAPP (Appendix B). • A review to verify that holding times are in accordance with the analytical methods specified in the QAPP. • A comparison of field duplicate samples with parent samples as described in the QAPP. • An evaluation of field blanks and equipment blanks as described in the QAPP. • An evaluation of laboratory QC procedures and samples. The goal of the QC review will be to provide valid data of known and documented quality that can be used to document water quality conditions for the project and identify constituent trends in surface water, groundwater, and stock ponds. When possible, laboratory-determined QC acceptance ranges will be used to evaluate data quality. In the absence of laboratory-determined acceptance limits, the general inorganic acceptance limits provided in the USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Superfund Data Review will be used (USEPA 2010). Detailed data validation procedures for the RVM are presented in the QAPP (Appendix B).