ARCHIVED REPORTS_WELL ABANDONMENT, SOIL, AND GROUNDWATER SUPPORTING DOCUMENTS

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Appendix E.1:Data Usability Summary • The MS/MSD prepared from groundwater sample SB-26-W-82-080815 had%Rs below the acceptance criteria for TPHd with silica gel, anthracene, benzo(k)fluoranthene, benzo(a)pyrene, indeno(1,2,3-cd)pyrene, dibenz(a,h)anthracene, and benzo(g,h,i)perylene. The analytes were qualified E in the sample for a potential low bias. • The MS/MSD prepared from groundwater sample SB-30-W-35-081121 had%Rs below the laboratory control limits for the following PAHs: naphthalene, anthracene, benzo(a)pyrene, indeno(1,2,3-cd)pyrene, dibenz(a,h)anthracene, and benzo(g,h,i)perylene. The compounds were qualified E in the sample for a potential low bias. • The MS prepared from groundwater sample SB-25-W-35-080818 had%Rs above the acceptance criteria for nitrate, nitrite, and sulfate. Nitrate and nitrite were not detected in the sample and no data qualified. Sulfate was detected in sample SB-25-W-35-080818; however, the MS %R was 111 percent, 1 percent above the control limit of 110 percent. The associated sulfate result was not qualified because the result is not expected to be biased by this marginal exceedence. Internal Standard Recoveries Internal standard recoveries were not reviewed as part of this evaluation, however; the laboratory noted that the internal standard area peaks were outside the control limits for BTEX analysis for soil sample SB-38-S-42.5-081125. The laboratory re-analyzed the sample and the areas were again outside control limits, indicating a matrix effect. No BTEX compounds were detected in the sample. The results were qualified E for a potential low bias. Representativeness Representativeness was assessed through the evaluation of method blank samples, trip and equipment blank samples, chain-of-custody(COC) forms,preservation, and holding times. Method Blank Results Laboratory method blanks were evaluated for any detection above the laboratory MDL. Target analytes were not detected in any method blanks with the following exceptions: • Phenanthrene was detected below the program reporting limit in two method blanks associated with groundwater samples SB-18-W-080811, SB-19-W-080812, SB-22-W- 080813, SB-22-WD-080813, SB-25-W-35-080818, SB-27-W-36-080818, and equipment blank QA_Screen-R-080804. The detected concentrations in the samples were greater than 10 times the amount detected in the blank and no data were qualified. Phenanthrene was detected within a similar concentration in equipment blank QA—Screen-R-080804 and the result was qualified E. • Phenanthrene was detected between the MDL and LOQ at 0.98 gg/kg in the method blank associated with soil samples SB-26-S-9-080815 and SB-26-S-83.5-080815. The detected concentrations in the samples were greater than 10 times the amount detected in the blank, so no flags were applied. • Benzo(a)pyrene and dibenz(g,h,i)perylene were detected above the program reporting limits in the method blank associated with groundwater samples SB-26-W-82-080815, SB-24B-W-39-080814, SB-23-W-39-080814, and QA-Rinsate_Blank-R-080815. The E.1-5 From Science to Solations