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2.5 Field and Laboratory QA/QC Procedures <br /> ' Quality control checks are performed to ensure that the data collected are representative and valid. <br /> Quality control checks are the mechanisms whereby the data quality objectives are monitored. The <br /> quality control samples to be collected on the project are described below. <br /> ' • Duplicate Samples — As a check for laboratory reproducibility, blind duplicate samples <br /> (unknown by the laboratory to be duplicates) will be collected and submitted to the <br /> ' laboratory at a rate of one for every 10 water samples collected, or once per site, <br /> whichever is greater. <br /> • Field Blank Samples —To evaluate sample bottle filling procedures and the effects of <br /> ' environmental contaminants at the site, one VOA water sample per site is collected in <br /> laboratory-cleaned and prepared containers of deionized or organic-free water supplied <br /> by the laboratory. Field blanks are collected downwind of the most contaminated area <br /> within a site. The sample is sealed, labeled and shipped with the real samples collected <br /> for the same parameter group. <br /> • Travel (Trio) Blanks — Trip blanks are intended to address interferences derived from <br /> ' improper sample container cleaning, preparation, contaminated source blank water, <br /> sample cross-contamination during storage and shipment, and environmental conditions <br /> affecting the sampling event to and from the site, including delivery to the laboratory. <br /> t Trip blanks will originate at the laboratory and will consist of VOA vials filled with <br /> source blank water, and will be sealed and stored in the cooler where real samples will be <br /> stored and shipped. <br /> • Equipment Blanks — Rinseate blanks, intended to provide quality control on field <br /> cleaning procedures, will be collected once per site. <br /> ' 2.6 Instrument/Equipment Testing, Inspection and Maintenance Requirements <br /> SOPS or manufacturer instructions for calibration of equipment will be referenced or included in <br /> each site SAP. These procedures for calibration will conform to manufacturer's recommended <br /> ' procedures or explain the deviation from said procedures. A copy of the procedure should be kept <br /> with the instrumentation. Calibration standards will be traceable to the National Institute of <br /> Standards and Technology (NIST) or other nationally recognized sources. The information will be <br /> ' recorded in the equipment calibration logbook. The date of calibration, an identification of <br /> standards used, the names of personnel performing calibration, the results of any calibration, and a <br /> list of any corrective actions taken will be recorded in the calibration logbook. One logbook will be <br /> maintained for each piece of equipment or device. <br /> A list of field equipment used in a sampling task will be included in each site SAP. A review of <br /> each site SAP by the Project Manager will ensure that measuring and test devices are of the proper <br /> type,range,and accuracy for the test to be performed within the established DQOs of a task. <br /> All measuring and test devices requiring calibration will be marked with calibration due dates. <br /> Documented and approved laboratory procedures will be used to calibrate analytical instruments. If <br /> necessary, at the discretion of the Program Manager, audits of instrument calibration laboratories <br /> will be performed to ensure proper calibration of instruments. Audits conducted by the Project <br /> ' Manager may be used to satisfy the audit requirements. <br /> 2.7 Instrument Calibration and Frequency <br /> ' This section provides guidance for control, calibration, and adjustment of field and laboratory <br /> measuring and testing instruments. Once calibrated, these devices must then be transported and <br /> handled to prevent the device from becoming out of calibration. <br /> Varra Companies <br /> Qualny Assurance Progecl Plan <br /> Page I I <br />