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cbCurtis &Tompkins.Ltd. Batch QC Report ' Metals Analytical Report ' Lab #: 227030 Location: DVI-Burn Pit Client: URS Corporation Prep: EPA 200.8 Project#: DVI-BP Analysis: EPA 6020 ' Field ID: MW-2-BP Batch#: 173723 MSS Lab ID: 227030-001 Sampled: 04/04/11 Matrix: Water _ Received: 04/04/11 Units: ug/L Prepared: 04/13/11 ' Type: - MS Lab ID: QC587504 Analyte MSS Result Spiked Result %REC Limits Diln Fac Analyzed Arsenic 2.990 100. 0 88.30 85 75-120 5.000 04/14/11 ' Barium 128.0 100.0 197.6 70 65-120 5.000 04/14/11 Cadmium 0.6830 100.0 83.65 83 72-120 5.000 04/14/11 Chromium 1.220 100.0 89.35 88 73-120 5.000 04/14/11 ' Copper 2 .328 100.0 63.60 81 64-120 5.000 04/14/11 Iron 689.5 - 10-, 000 9,250 86 70-120 5.000 04/14/11 Lead 0.4245 100.0 83.05 83 69-120 5.000 04/14/11 Magnesium 83,100 10,000 85,800 27 NM 59-124 5.000 04/14/11 ' Manganese 6,535 100.0 3,513 -3023 NM 71-120 50.00 04/15/11 Molybdenum 5.710 100.0 84.30 79 70-120 5.000 04/14/11 Nickel 8.360 100.0 91.20 83 68-120 5.000 04/14/11 Selenium 0.3385 100.0 82.15 82 71-120 5.000 04/14/11 , Type: MSD Lab ID: QC587505 ' Analyte - Spiked Result %RECLimits RPD Lim Diln:Fac Analyzed Arsenic 100.0 83.25 80 75-120 6 32 5.000 04/14/11 , Barium 100. 0 191.0 63 * 65-120 3 30 5.000 04/14/11 Cadmium 100.0 79.60 79 72-120 5 23 5.000 04/14/11 Chromium 100.0 88.90 88 73-120 1 28 5.000 04/14/11 Copper 100.0 81.20 79 64-120 3 46 5.000 04/14/11 Iron 10, 000 9, 285 86 70-120 0 32 5.000 04/14/11 Lead 100.0 79.50 79 69-120 4 23 5.000 04/14/11 Magnesium 10, 000 83,400 3 NM 59-124 3 28 5.000 04/14/11 ' Manganese 100.0 3,309 -3226 NM 71-120 6 30 50.00 04/15/11 Molybdenum 100.0 80.85 75 70-120 4 42 5.000 04/14/11 Nickel 100.0 90.80 82 68-120 0 36 5.000 04/14/11 Selenium 100.0 78.70 78 71-120 4 26 5.000 04/14/11 ' *= Value outside of QC limits; see narrative , ' NM= Not Meaningful: Sample concentration > 4X spike concentration RPD= Relative Percent Difference Page 1 of 1 Sf..0 40 of 69 ,