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Appendix F:Data Usability Summary A summary of qualified data is provided in Table F-1. Data validation reason codes for all qualified data are also provided and defined on Table F-1. Precision and Accuracy The precision and accuracy of field and laboratory QC samples were evaluated. The calculated relative percent differences (RPDs)for field duplicate and matrix spike/matrix spike duplicate (MS/MSD)pairs provided information on the precision of sampling and analytical procedures. The RPDs for laboratory control sample/laboratory control sample duplicates (LCS/LCSDs) provided information on the precision of the analytical procedures. Evaluation of the percent recoveries (%Rs) of MS/MSDs,LCS/LCSDs, and surrogates provided information on accuracy. LCS/LCSDs An LCS was analyzed with each analytical batch of samples. An LCSD was analyzed with some batches of samples. The%Rs for all LCS and LCSDs were within the laboratory control limits with the following exceptions. The %Rs for benzo(a)pyrene,benzo(b)fluoranthene,and benzo(k)fluoranthene were below the laboratory control limit in the LCS associated with groundwater samples SB-44-W-100720, SB-45-W-100722, SB-46-W-100721, and SB-47-W- 100721 collected on July 20, 2010. The%Rs for 1-methylnaphthalene and naphthalene were above the laboratory control limit in the LCS associated with groundwater samples SB-44-W- 100720, SB-45-W-100722, SB-46-W-100721, and SB-47-W-100721 collected on July 20, 2010. The results were qualified E as estimated. Surrogates Surrogate recoveries were evaluated for all methods. All surrogates were within laboratory control limits,with one exception. The%Rs for terphenyl-d14,used in the analysis of PAHs, was below the laboratory control limit in sample SB-45-S-5-100720. The%R was 50 percent, 1 percent below the control limit of 51 percent. Since the%R was a marginal exceedence and the other two surrogates used in the analysis were within the control limits it is unlikely the associated results would be biased significantly. Therefore, no data were qualified. Field Duplicate One groundwater field duplicate was submitted with the samples in this data set. Groundwater sample SB-44-WD-100720 is a field duplicate of SB-44-W-100720. Benzo(a)pyrene and phenanthrene were detected in the parent sample but not in the field duplicate, and naphthalene and TPHd were detected in the field duplicate but not in the parent sample. RPDs were not calculated because the analytes were not detected in both samples. However, because the detections for benzo(a)pyrene,phenanthrene, naphthalene, and TPHd were not confirmed in both the parent samples and the field duplicates, they were qualified E as estimated. MS/MSDs One project-specific MS/MSD sample was collected with groundwater sample SB-44-W- 100720. The%Rs for naphthalene were above the laboratory control limit in the MS and MSD prepared from sample SB-44-W-100720. No data were qualified because the associated results were non-detect and the samples were determined not to be affected by a high bias. F-3 'Mair ?J The Benham Companies,LLC �,i��`!', FW7�14nnavl S.,btld:ary