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SOP NUMBER 28.0 <br />Page 17 of 24 <br />Analytical Data Validation <br />5.2 DATA REVIEW NARRATIVE REPORTS <br />All data review activities will be detailed in a data validation narrative report. At a minimum, <br />the report will include an introduction (Section 1), a summary of the data review process <br />(Section 2), data review narratives for the review of laboratory performance parameters (Section <br />3), data review narratives for the review of sample-specific parameters conducted on each <br />package (Section 4), and an overall assessment of the data (Section 5). The overall assessment <br />will state any limitations to the usability of the data as well as address the quantitative and <br />qualitative data quality indicators of sensitivity, accuracy, precision, completeness, <br />representativeness, and comparability. All data review reports will be peer reviewed by a <br />qualified person to assure compliance with the procedures described in this SOP. <br />Powertech R Squared Inc <br />Rev 28-1 JAB Attachment A <br />4/23/2007