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nNAErRiRAA <br /> Krazan&Associates,Inc. Project: United Rentals <br /> 215 West Dakota Avenue Project Number 1310141 Reported: <br /> Clovis CA,93612 Project Manager: Cody Taylor 05/10/10 09:24 <br /> Metals by EPA 6000/7000 Series Methods-Quality Control <br /> Sierra Analytical Labs,Inc. <br /> Reporting Spike Source %"REC RPD <br /> Analyte Result Limit Units Level Result %d2EC Limits RPD Limit Notes <br /> Batch BOE0408-EPA 3050B <br /> Blank(BOE0408-BLKI) Prepared&Analyzed:05/04/10 <br /> Cadmium NO 0.50 mg/kg <br /> Chromium NO 3.0 " <br /> Lead ND 3.0 " <br /> Nickel ND 4.0 <br /> Zinc ND 10 <br /> LCS(BOE0408-BS1) Prepared&Analyzed:05/04/10 <br /> Cadmium 105 0.50 mg/kg 100 105 80-120 <br /> Chromium 105 3.0 100 105 80-120 <br /> Lead 106 3.0 100 106 80-120 <br /> Nickel Ill 4.0 100 111 80-120 <br /> Zinc 103 10 100 103 78-122 <br /> Matrix Spike(BOE0408-MSI) Source:1004458-14 Prepared&Analyzed:05/04/10 <br /> Cadmium 84.0 0.50 mg/kg 91.7 ND 91.6 70-130 <br /> Chromium 133 3.0 91.7 49 91.6 70-130 <br /> Lead 85.7 3.0 91.7 5.2 87.8 70-130 <br /> Nickel 109 4.0 91.7 32 84.0 70-130 <br /> Zinc 126 10 91.7 41 92.7 70-130 <br /> Matrix Spike Dup(BOE0408-MSDI) Source:1004458-14 Prepared&Analyzed:05/04/10 <br /> Cadmium 84.0 0.50 mg/kg 92.4 ND 90.9 70-130 0.00 20 <br /> Chromium 133 3.0 92.4 49 90.9 70-130 0.00 20 <br /> Lead 88.0 3.0 92.4 5.2 89.6 70-130 2.65 30 <br /> Nickel 112 4.0 92.4 32 86.6 70-130 2.71 20 <br /> Zinc 125 10 " 92.4 41 90.9 70-130 0.797 20 <br /> The results in this report apply to the samples analyzed in accordance with the chain ofcustody document. This analytical report must be reproduced in its entirety. <br /> 26052 MERrr CIRCLE SurrE 105,LAGUNA HILLS,CALIFORNIA 92653 <br /> TELEPHONE: (949) 348-9389 FAx: (949) 348-9115 <br /> E-MAIL: SIERRALABS @ SIERRALABS.NEr Page 28 of 35 <br />