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cbCurtis&Tompkins,Ltd. , <br /> Batch QC Report , <br /> Dissolved Metals Analytical Report <br /> Lab #: 227030 Location: DVI-Burn Pit , <br /> Client: URS Corporation Prep: METHOD <br /> Project#: DVI-BP Analysis: EPA 6020 , <br /> Field ID: ZZZZZZZZZZ Sampled: 04/11/11 <br /> MSS Lab ID: 227168-001 Received: 04/11/11 <br /> Matrix: Filtrate Prepared: 04/14/11 <br /> Units: ug/L Analyzed: 04/15/11 ' <br /> Batch#: 173768 <br /> Type: MS Lab ID: QC587687 <br /> Analyte MSS Result Spiked Result $REC Limits Diln Fac ' <br /> Arsenic 61.45 100. 0 152.0 91 75-120 5. 000 <br /> Barium 25.83 100.0 109.6 84 65-120 5.000 <br /> Cadmium <0.6551 100.0 82.55 83 72-120 5.000 <br /> Chromium 2.190 100.0 76.85 75 73-120 50.00 <br /> Copper 36.09 100.0 107.1 71 64-120 5.000 <br /> Iron 3,243 10, 000 12,060 88 70-120 5.000 <br /> Lead 1.008 100.0 82.95 82 69-120 5.000 , <br /> Magnesium 267,000 10, 000 258,200 -88 NM 59-124 50.00 <br /> Manganese 1,677 100.0 1,614 -63 NM 71-120 50.00 <br /> Molybdenum 1.374 100.0 84.90 84 70-120 5.000 <br /> Nickel 7.800 100.0 89.50 82 68-120 5.000 , <br /> Selenium 1.861 100.0 86.45 85 71-120 5.000 <br /> Type: MSD Lab ID: QC587688 <br /> -.. Analyte Spiked Result %REC Limits RPD Lim Diln Fac <br /> Arsenic 100.0 159. 0 98 75-120 5 32 5.000 <br /> Barium 100.0 114.3 88 65-120 4 30 5.000 <br /> Cadmium 100.0 84. 70 85 72-120 3 23 5.000 <br /> Chromium 100.0 79.80 78 73-120 4 28 50.00 <br /> Copper 100.0 102.6 66 64-120 4 46 5.000 <br /> Iron 10,000 12,110 89 70-120 0 32 5.000 <br /> Lead 100.0 85.40 84 69-120 3 23 5.000 <br /> Magnesium 10,000 263,300 -37 NM 59-124 2 28 50.00 <br /> Manganese 100.0 1,656 -21 NM 71-120 3 30 50.00 <br /> Molybdenum 100.0 87.15 86 70-120 3 42 5.000 <br /> Nickel 100.0 91.55 84 68-120 2 36 5.000 , <br /> Selenium 100.0 94.70 93 71-120 9 26 5.000 <br /> NM= Not Meaningful: Sample concentration > 4X spike concentration <br /> RPD= Relative Percent Difference <br /> Page 1 of 1 <br /> 53.0 ' <br /> 52 of 69 ' <br />