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Summary of Findings: All samples were analyzed according to the accompanying chains of custody. All analytical holding times were met. QC data were reviewed for laboratory and instrument precision and accuracy from LCS/LCSD recoveries and relative percent differences (RPDs) and MS/MSD sample recoveries and RPDs. All quality control elements were found to be within acceptable limits with the following exceptions: • The MS/MSD percent recoveries and RPD associated with the sulfate analysis of MW-101 and MW-201 were not meaningful because the concentration of sulfate in the parent samples was greater than four times the concentration used for the spike. Therefore, the criteria were not evaluated. • The MS/MSD percent recoveries associated with the metals analysis of TW-13 were less than the lower control limit for iron. Iron was detected in the sample and was qualified as estimated (J). Additionally the MS/MSD percent recoveries and RPD were not meaningful for manganese because the concentration in the parent sample was greater than four times the concentration used for the spike. Therefore, the criteria were not evaluated. • The MS/MSD percent recoveries and RPDs associated with the metals analysis of TW-17 were not meaningful for iron and manganese because the concentration in the parent sample was greater than four times the concentration used for the spike. Therefore, the criteria were not evaluated. Field sampling precision was also evaluated by using the calculated RPD between results reported for the field duplicate pairs, which are listed above. All RPD results were found to be within the acceptable limits for precision for all methods with the following exception: • The field duplicate pair MW-448D and MW-448D Dup had an RPD that was greater than the control limit for managanese; the result was qualified as estimated (J) in the parent sample. No target analytes were detected in any method blank or field QC samples with the following exceptions: • Equipment Rinse and Field Blank, collected on July 19, 2011, had TOC detected at 0.3 mg/L and sulfate detected at 0.4 mg/L and 0.3 mg/L, respectively. Sulfate was detected in all associated samples at concentrations that were greater than five times the blank concentration and was not qualified. Seven samples had TOC detected below the reporting limit and less than five times the blank result; the sample results were qualified as not detected at the reporting limit (U). The remaining samples had TOC detected at concentrations that were greater than five times the blank concentration and were not qualified. • Equipment Rinse and Field Blank, collected on July 20, 2011, had TOC detected at 0.9 mg/L and TDS detected at 8.0 mg/L and 7.0 mg/L, respectively. Additionally, Field Blank had 1.2 mg/L of sulfate detected. TDS and sulfate were detected in all associated samples at concentrations that were greater than five times the blank concentrations and were not qualified. Eight samples had TOC detected below the reporting limit and less than five times the blank result; the sample results were qualified as not detected at the reporting limit (U). Twelve samples had TOC detected at concentrations that were greater than the reporting limit and less than five times the blank result; the results were qualified as estimated (J). The remaining samples had TOC detected at concentrations that were greater than five times the blank concentration and were not qualified. Page 2of6