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Water Quality Monitoring Plan Climax Molybdenum Company <br /> Version R4 Permit No M-1977-493 <br /> ■ Laboratory quantification or reporting limit(defined); <br /> ■ Calibration verification results; <br /> ■ Theoretical concentrations for laboratory control samples, if used; <br /> ■ Method blank results; <br /> ■ Results of laboratory QC analyses [laboratory control sample/laboratory control sample <br /> duplicate(LCS/LCSD); matrix spike/matrix pike duplicate samples (MS/MSD); analytical <br /> duplicate, etc.] associated with each batch of samples analyzed, as appropriate to the <br /> method protocol; <br /> ■ Definition/explanation of any internal data qualifiers applied; and <br /> ■ A brief narrative describing sample analyses including description of any problems or <br /> unusual circumstances during analysis. <br /> 7.3.4 Data Evaluation <br /> All data shall be evaluated according to the following procedures to ensure that only data of appropriate <br /> quality are used to evaluate site conditions. <br /> 7.3.4.1 Field Measurements <br /> Field measurements including pH, specific conductance, and temperature will be collected during <br /> monitoring activities. The field data will be reviewed to prevent transcriptional or computational errors. <br /> 7.3.4.2 Laboratory Data <br /> Laboratory calculations and data review shall be performed by the laboratory in accordance with the <br /> procedures described by the analytical method. The laboratory review shall include the results of the QC <br /> analyses, instrument calibration, and maintenance records, calculations, and the chain of custody record <br /> and analytical holding times. The laboratory will prepare a case narrative to summarize the findings of their <br /> review, noting any problems associated with the analysis of the field samples. <br /> After receipt of the data from the laboratory, data evaluation shall be performed to: <br /> ■ Ensure that the analytical laboratory was operating in control at the time the samples <br /> were analyzed and to document that appropriate methods and holding times were <br /> observed; and <br /> ■ Assess whether the data are suitable to meet project objectives. <br /> EPP—Appendix C March 2018 35 <br />