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Data Usability Summary <br /> DATA USABILITY SUMMARY <br /> The following sections summarize the findings of the data evaluation process. The following is a <br /> summary of the data verification and validation qualifiers used in the data evaluation: <br /> Qualifier Description <br /> E Indicates the reported value is estimated due to associated QC <br /> results. <br /> J Indicates the reported value is an estimated concentration <br /> detected between the method detection limit(MDL)and limit of <br /> quantitation(LOQ). <br /> A summary of qualified data is provided in Table B-1. Data validation reason codes for all <br /> qualified data are also presented and defined on Table B-1. <br /> Precision and Accuracy <br /> The precision and accuracy of field and laboratory QC samples were evaluated. The calculated <br /> relative percent differences (RPDs) for field duplicate and matrix spike/matrix spike duplicate <br /> (MS/MSD)pairs provided information on the precision of sampling and analytical procedures, <br /> and the RPDs for laboratory control sample/laboratory control sample duplicate(LCS/LCSD) <br /> pairs provided information on the precision of the analytical procedures. Evaluation of the <br /> percent recoveries(%Rs)of MS/MSDs, LCS/LCSDs, and surrogates provided information on <br /> accuracy. <br /> MS/MSDs <br /> Project-specific MS/MSDs were collected with the groundwater samples. All MS/MSD samples <br /> were within QC range;no qualifiers applied. <br /> LCS/LCSDs <br /> A LCS was analyzed with each analytical batch of samples. All LCS/LCSD%Rs were within the <br /> laboratory control limits. <br /> Surrogates <br /> All surrogates were within QC range; no qualifiers applied. <br /> Representativeness <br /> Representativeness was assessed through the evaluation of method blank samples,trip and <br /> equipment blank samples, chain-of-custody forms,preservation, and holding times. The reported <br /> results were also compared to the laboratory's MDLs and LOQs. <br /> Method Blank Results <br /> All laboratory method blanks were free of contamination. <br /> Field QC Results <br /> One rinsate blank(QA-R-070806)was submitted with the groundwater field samples. The <br /> rinsate blank was free of contamination with the following exceptions:Naphthalene and THPd <br /> were detected in rinsate blank QA-R-070806 at 0.017 micrograms per liter(gg/L)and 68 µg/L, <br /> respectively. These analytes consequently qualified as E. <br /> From Science toSoluflow <br />