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specified in the QAPjP have been implemented. Emphasis on field <br /> documentation will help assure sample integrity and sufficient technical <br /> information to recreate each field event. The results of this <br /> completeness check should be documented, and environmental data affected <br /> by incomplete records should be identified. <br /> Identification of Valid Samples -- This review involves interpretation and <br /> evaluation of the field records to detect problems affecting the repre- <br /> sentativeness of environmental samples. Examples of items that might <br /> indicate potentially invalid samples include improper well development, <br /> improperly screened wells, instability of pH or conductivity, and collec- <br /> tion of volatiles near internal combustion engines. The field records <br /> should be evaluated against the QAPjP and SOPS. The reviewer should docu- <br /> ment the sample validity and identify the environmental data associated <br /> with any poor or incorrect field work. <br /> Correlation of Field Test Data -- This review involves comparing any <br /> available results of field measurements obtained by more than one method. <br /> For example, surface geophysical methods should correlate with direct <br /> methods of site geologic characterization such as lithologic logs <br /> constructed during drilling operations. <br /> Identification of Anomalous Field Test Data -- This review identifies any <br /> anomalous field test data. For example, a water temperature for one well <br /> that is 5 degrees higher than any other well temperature in the same <br /> aquifer should be noted. The reviewer should evaluate the impact of <br /> anomalous field measurement results on the associated environmental data. <br /> Validation of Field Analyses -- This review validates and documents all <br /> data from field analysis that are generated in situ or from a mobile <br /> laboratory as specified in Section 2.7.4.2. The reviewer should document <br /> whether the QC checks meet the acceptance criteria, and whether corrective <br /> actions were taken for any analysis performed when acceptance criteria <br /> were exceeded. <br /> 2.7.4 .2 Laboratory Activities <br /> The review of laboratory data should be conducted by one or more persons <br /> knowledgeable in laboratory activities and include evaluating, at a minimum, the <br /> following subjects: <br /> Completeness of Laboratory Records -- This review determines whether: (1) <br /> all samples and analyses required by the QAPjP have been processed, (2) <br /> complete records exist for each analysis and the associated QC samples, <br /> and that (3) the procedures specified in the QAPjP have been implemented. <br /> The results of the completeness check should be documented, and <br /> environmental data affected by incomplete records should be identified. <br /> Evaluation of Data with Respect to Detection and Quantitation Limits -- <br /> This review compares analytical results to required quantitation limits. <br /> Reviewers should document instances where detection or quantitation limits <br /> ONE - 6 Revision 1 <br /> July 1992 <br />