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' cb Curtis &Tompkins.Ltd. <br /> ' Batch QC Report <br /> Metals Analytical Report <br /> Lab #: 227030 Location: DVI-Burn Pit <br /> Client: URS Corporation Prep: EPA 200.8 <br /> Project#: DVI-BP Analysis: EPA 6020 <br /> ' Matrix: Water Batch#: 173723 <br /> Units: ug/L Prepared: 04/13/11 <br /> Diln Fac: 5.000 Analyzed: 04/14/11 <br /> Type: BS Lab ID: QC587502 <br /> ' Analyte Spiked Result %REC Limits <br /> Arsenic 100.0 99.40 99 78-120 <br /> Barium 100.0 84.15 84 77-120 <br /> Cadmium 100.0 86.30 86 77-120 <br /> Chromium 100.0 98.35 98 79-120 <br /> Copper 100.0 94.40 94 70-120 <br /> ' Iron 10,000 10,590 106 77-122 <br /> Lead 100.0 87.90 88 75-120 <br /> Magnesium 10,000 8,520 85 73-120 <br /> Manganese 100.0 - 100.5 100 79-120 <br /> ' Molybdenum 100.0 83.40 83 72-120 <br /> Nickel 100.0 97.95 98 77-120 <br /> Selenium 100.0 88.20 88 75-121 <br /> Type: BSD Lab ID: QC587503 <br /> Analyte Spiked Result %REC Limits RPD Lim <br /> Arsenic 100.0 96.45 96 78-120 3 21 <br /> ' Barium 100.0 86.70 87 77-120 3 20 <br /> Cadmium 100.0 87.35 87 77-120 1 21 <br /> Chromium 100.0 96.65 97 79-120 2 20 <br /> Copper 100.0 93.45 93 70-120 1 31 <br /> Iron 10, 000 10,250 102 77-122 3 23 <br /> Lead 100.0 89.80 90 75-120 2 20 <br /> Magnesium 10, 000 8,670 87 73-120 2 20 <br /> Manganese 100.0 99.65 100 79-120 1 25 <br /> Molybdenum 100.0 84.90 85 72-120 2 23 <br /> Nickel 100.0 95.90 96 77-120 2 20 <br /> Selenium 100.0 86.85 87 75-121 2 22 <br /> RPD= Relative Percent Difference <br /> ' Page 1 of 1 55.0 <br /> ' 39 of 69 <br />