ARCHIVED REPORTS_LIMITED PHASE 2 SOIL REPORT

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CRA MEMORANDUM Page 3 Inorganic Analyses The LCS/LCSD contained all analytes of interest. LCS recoveries were assessed per the "Guidelines". All LCS recoveries and RPDs were within the control limits, demonstrating acceptable analytical accuracy and precision. 6.0 Matrix Spike/Matrix Spike Duplicate (MS/MSD)Analyses To evaluate the effects of sample matrices on the extraction or digestion process, measurement procedures, and accuracy of a particular analysis, samples are spiked with a known concentration of the analyte of concern and analyzed as MS/MSD samples. The RPD between the MS and MSD is used to assess analytical precision. MS/MSD analyses were performed as specified in Table 1. If only the MS or MSD recovery was outside of control limits, no qualification of the data was performed based on the acceptable recovery of the companion spike and the acceptable RPD. Organic Analyses The MS/MSD samples were spiked with the compounds specified in the method. All percent recoveries and RPD values were within the associated control limits, demonstrating acceptable analytical accuracy and precision with a few exceptions. Where low recoveries were found the associated sample results were qualified as estimated as estimated due to the implied low bias. Where an extremely low recovery was found the associated sample result was rejected due to the poor analytical efficiency demonstrated. Inorganic Analyses The MS/MSD samples were spiked with the analytes of interest, and the results were evaluated using the "Guidelines". All percent recoveries and RPD values were within the control limits, demonstrating acceptable analytical accuracy and precision with a few exceptions. Where high recoveries were found the associated sample results were qualified as estimated due to the implied high bias. Where low recoveries were found the associated sample results were qualified as estimated due to the implied low bias.Where extremely low recoveries were found the associated sample results were qualified as estimated and the associated non-detect results were rejected due to poor analytical efficiency demonstrated. A summary of the organic and inorganic qualifications and exceptions is presented in Table 5. 7.0 Analyte Reporting The laboratory did not report any detected concentrations below the laboratory's practical quantitation limit (PQL)/reporting limit (RL). All soil results were reported on a wet weight basis. 8.0 Conclusion Based on the assessment detailed in the foregoing,the summarized data are acceptable with the specific exceptions and qualifications noted herein. EQUAL EMPLOYMENT OPPORTUNITY EMPLOYER