ARCHIVED REPORTS_WORK PLAN TO ESTABLISH BACKGROUND SOIL CONCENTRATIONS

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• GENESIS ENGINEERING 8 REDEVELOPMENT • Documentation will be recorded in permanent ink • Entries will be legible • Errors will be corrected by crossing out with a single line, dating, and initialing • Final field data will be reviewed by the Field Team Leader before database entry 7.3.4 Laboratory Data Reporting Analytical results will be reported in the laboratory's approved format in both hard copy and as standard Electronic Data Deliverable ("EDD") if available. In addition to the reported data,the laboratory data report will, at a minimum, include a narrative that will discuss any problems or discrepancies and sufficient calibration and QC information to determine that the method was performing correctly at the time that the samples were analyzed. In addition to the hard-copy report requirements, the laboratory will provide EDDs conforming to a standard ASCII comma-delimited format(if available). Laboratory data will be reported in the appropriate unit of concentration depending upon the matrix and type of analysis. Generally,water sample concentrations will be reported in micrograms per liter("ltg/L"); soil sample concentrations will be reported in milligrams per • kilogram("mg/kg")or micrograms per kilogram("pg/kg"). Premature rounding of intermediate results can significantly affect the final result. Therefore,the reported results will be rounded to the correct number of significant figures only after all calculations and manipulations are completed. As many significant figures as are warranted by the analytical method will be used in pre-reporting calculations. Before being released by the laboratory, all analytical data and QC data generated by the laboratory will be reviewed by the laboratory's analyst. The data will be checked for the following: transcription errors, calculation accuracy and dilution factors, and compliance with QC requirements. Failure to meet method performance QC criteria will result in the reanalysis of the sample or lot. After the data have been reviewed,they are assembled into a data package. The final laboratory data package will be reviewed by the Laboratory QC Manager before delivery and by the Project Manager upon receipt. 8.0 DATA QUALITY MANAGEMENT This Section contains a discussion of the data management scheme, data validation, and procedures for statistical evaluation of the data quality. 8.1 Data Management Plan The Project Data Management Plan adopted for this QAPP conforms to the guidelines set for • the QAPP data management as indicated in U.S. EPA's Guidance for Conducting RDFS William DePaoli Property 12 of 21 Quality Assurance Project Plan February 2012