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cbCurtis&Tompkins, Ltd. <br /> Analytical Laboratories,Since 1878 <br /> Batch QC Report <br /> TCLP Metals <br /> Lab #: 187486 Location: Bridgestone/Firestone Metal Shavings <br /> Client: MWH Prep: EPA 3010A <br /> Project#: 4050530.010101 Analysis: EPA 6010B <br /> Field ID: NEWARK Batch#: 114630 <br /> MSS Lab ID: 187486-001 Sampled: 06/16/06 <br /> Matrix: TCLP Leachate Received: 06/16/06 <br /> Units: ug/L Prepared: 06/22/06 <br /> Diln Fac: 10.00 Analyzed: 06/22/06 <br /> Type: MS Lab ID: QC344843 <br /> Analyte MS'S Result Spiked Result %REC Limits <br /> Arsenic <10.47 1, 000 1, 005 100 76-129 <br /> Barium NA <br /> Cadmium <5.500 200.0 212.8 106 80-120 <br /> Chromium <5.564 2, 000 1, 985 99 80-120 <br /> Lead 24.18 2,000 2,030 100 70-120 <br /> Selenium <15.75 1,000 1,030 103 73-132 <br /> Silver <14.03 200.0 97.67 49 * 73-121 <br /> Type: MSD Lab ID: QC344844 <br /> Analyte Spiked Result %REC LimitsRPD `Lim <br /> Arsenic 1,000 826.3 83 76-129 19 20 <br /> Barium NA <br /> Cadmium 200.0 173.2 87 80-120 21 * 20 <br /> Chromium 2, 000 1, 613 81 80-120 21 * 20 <br /> Lead 2, 000 1, 653 81 70-120 20 20 <br /> Selenium 1, 000 837.6 84 73-132 21 * 20 <br /> Silver 200.0 77.28 39 * 73-121 23 * 20 <br /> *= Value outside of QC limits; see narrative <br /> NA= Not Analyzed <br /> RPD= Relative Percent Difference <br /> Page 1 of 1 4.0 <br />