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CbCurtis &Tompkins.Ltd. <br /> Batch QC Report <br /> RCRA Metals <br /> Lab It: 252701 Location: Tim Valentine <br /> Client: EarthTouch Prep: EPA 3050B <br /> Project#: ZION-2420-CA Analysis: EPA 6010B <br /> Matrix: Miscell. Batch#: 207611 <br /> Units: mg/Kg Prepared: 01/31/14 <br /> Diln Fac: 1.000 Analyzed: 01/31/14 <br /> Type: BS Lab ID: QC726178 <br /> Analyte Spiked Result %REC Limits <br /> Arsenic 50.00 49.32 99 80-120 <br /> Barium 100.0 104.3 104 80-120 <br /> Cadmium 10.00 10.30 103 80-120 <br /> Chromium 100.0 102.3 102 80-120 <br /> Lead 100.0 98.06 98 80-120 <br /> Selenium 50.00 51.07 102 80-120 <br /> Silver 10.00 9.726 97 80-120 <br /> Type: BSD Lab ID: QC726179 <br /> Analyte Spiked Result %REC Limits RPD Lim <br /> Arsenic 50.00 49.86 100 80-120 1 20 <br /> Barium 100.0 105.6 106 80-120 1 20 <br /> Cadmium 10.00 10.44 104 80-120 1 20 <br /> Chromium 100.0 103.3 103 80-120 1 20 <br /> Lead 100.0 100.7 101 80-120 3 20 <br /> Selenium 50.00 51.31 103 80-120 0 20 <br /> Silver 10.00 9.812 98 80-120 1 20 <br /> RPD= Relative Percent Difference <br /> 77.0 <br /> Page 1 of 1 <br /> 114 of 121 <br />