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40 PR—ECISIGG • <br /> ENVIRO-T CH <br /> Analytical Laboratory CERTIFICATE OFANALYS <br /> Tuesday,July 12, 20-Or <br /> Attention: Doug Heard <br /> Kleinfelder, Inc. Report Page 33 ofl <br /> 2825 Myrtle St. <br /> Stockton, CA 95205 <br /> Metals by EPA 6000/7000 Series Methods-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AG51101 -EPA 3050B <br /> Blank(AG51101-BLKI) Prepared: 11-Jul-05 Analyzed: 12-Jul-05 <br /> Chromium ND 0.0100 mg/kg <br /> Nickel ND 0.500 " <br /> Lead ND 0.0100 " <br /> Zinc ND 0.0100 <br /> Cadmium ND 0.00200 " <br /> LCS(AG51101-BS1) Prepared: 11-Jul-05 Analyzed: 12-Jul-05 <br /> Lead 0.576 0.0100 mg/kg 0.500 115 80-120 <br /> Nickel 0.455 0.500 0.500 91 80-120 <br /> Chromium 0.504 0.0100 0.500 101 80-120 <br /> Cadmium 0.523 0.00200 0.500 105 80-120 <br /> Zinc 0.492 0.0100 0.500 98 80-120 <br /> Matrix Spike(AG51101-MSI) Source:5070716-14 Prepared: 11-Jul-05 Analyzed: 12-Jul-05 <br /> Zinc 183 0.500 mg/kg 50.0 144 78 75-125 <br /> Cadmium 47.0 0.100 50.0 ND 94 75-125 <br /> Chromium 170 0.500 50.0 129 82 75-125 <br /> Nickel 156 0.500 50.0 118 76 75-125 <br /> Lead 57.5 0.500 50.0 16.7 82 75-125 <br /> Matrix Spike Dup(AG51101-MSDI) Source:5070716-14 Prepared: 11-Jul-05 Analyzed: 12-Jul-05 <br /> Chromium 170 0.500 mg/kg 50.0 129 82 75-125 0 20 <br /> Nickel 156 0.500 50.0 118 76 75-125 0 20 <br /> Lead 60.1 0.500 50.0 16.7 87 75-125 4 20 <br /> Zinc 184 0.500 50.0 144 80 75-125 0.5 20 <br /> Cadmium 46.0 0.100 50.0 ND 92 75-125 2 20 <br /> mg1L=milligrams per Liter=ppm DLR=Detection Limit for Purpose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />