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Aprii 22, 1999 • <br />- Well purging <br />- Sample collection <br />- Sample filVation <br />- Field QA/QC procedures <br />• Page 21 <br />Clean, decontaminated equipment will be used for all sampling activities. Decontamination <br />will be performed in accordance with the procedures given in Appendix D, Standard Operating <br />Procedure for Equipment Decontamination. <br />6.2 Calibration Procedures and Frequency <br />All instruments and equipment used during sampling and analysis will be operated, <br />calibrated, and maintained according to the manufacturer's guidelines and recommendations aswell <br />as criteria set forth in the applicable analytical methodology references. Calibration, operation, and <br />maintenance will be performed by personnel properly trained in these procedures. Documentation <br />of all routine and special maintenance and calibration will be maintained in an appropriate field log <br />book. <br />Field instrumentation will be calibrated on-site at the beginning of each sampling day, or at <br />any time that instrument readings are questionable. Calibration of the pH, conductivity, and <br />temperatwe meters will be performed as outlined in Appendix C, Standard Operating Procedure for <br />Groundwater Sampling. <br />6.3 Data Reduction, Validation, and Reporting <br />6.3.1 Data Reduction <br />Data reduction includes all processes that change the numeric value of the raw data. All field <br />data aze generated by directly reading the instrumentation (no calibration curves are generated). <br />Therefore, no reduction of field data wilt be performed. <br />All laboratory data reduction will be performed in accordance with the appropriate <br />methodology and presented to the BLM. The laboratory data will be reviewed to verify that the <br />appropriate units are assigned toallconcentrations. Additionally, further data reductionmayinclude <br />graphs. <br />6.3.2 Daln Va(idaliore <br />Data will be evaluated for precision, accuracy, and completeness. Validation of field data <br />will be performed by an internal documented annual procedures audit. <br />Agapito Associates, Inc. <br />