Laserfiche WebLink
DGM Environmental Monitoring QAPP <br /> analytical sample batch are present and acceptable. <br /> 8.2.1.1 Data Verification Request —Assay Correction System <br /> Questionable or anomalous data is investigated through DVR-ACF system. An example <br /> of a Data Verification Request Form is shown in Figure 9-1. This form is to be used by <br /> any data reviewer to request verification of reported data. The data verification request <br /> should be channeled through the QAO. The QAO sees that the appropriate party is <br /> contacted and tracks and documents the investigation. The QAO acts as liaison <br /> between the request originator and the reporting laboratory or other reporting entity. <br /> The QAO contacts the reporting entity and initiates and records a request for <br /> investigation of the questioned data. The QAO reviews the results of the investigation <br /> once it is completed and reported. The QAO then completes an Assay Correction Form <br /> to document the results of the investigation. An example of an Assay Correction Form <br /> is shown in Figure 9-2. A copy of this report is given to the originator of the data <br /> verification request. Each DVR-ACF investigation sequence and any required follow-up <br /> will be documented in the QAO's QA records. <br /> 8.2.2 Data Validation <br /> Data validation is a sampling and analytical process that includes evaluating <br /> compliance with method, procedure, or contract requirements. The QAO may make an <br /> initial assessment of procedural compliance during quality review of the COC and <br /> analytical data packets. During review of the analytical data packets the QAO checks to <br /> see that the measurement performance criteria or QC requirements listed in QAPP <br /> Section 10 or the particular laboratory procedure are either met or addressed. The QAO <br /> finalizes data review by initialing and dating the analytical data packet once he is <br /> satisfied that it meets all quality requirements. <br /> 8.2.2.1 System Evaluation/Audit Program <br /> The System Evaluations/Audit Program is discussed in Section 11 of this document. <br /> This program establishes a quality assurance auditing function and is applied to both <br /> sampling and analytical procedures. Sampling data validation is accomplished through <br /> field auditing or evaluation of sampling procedures being followed in the field by <br /> sampling personnel. Likewise, procedural compliance with analytical procedures may <br /> be assessed through QAO auditing or evaluation of the specific contract laboratory's <br /> procedures as the analyses are conducted in that laboratory. The evaluation program <br /> determines whether the samples are acquired and or analyzed as described in the <br /> written procedures. <br /> 8.3 Data Usability Assessment <br /> The EPA defines usability assessment as the "determination of the adequacy of data, <br /> based on the results of validation and verification, for the decisions being made. The <br /> usability step involves assessing whether the process execution and resulting data <br /> Page 11 <br />