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S e q l.a OIa 819 Stoker Avenue,Suite 8 <br /> ' Sa ramento,CA 95834 <br /> ' <br /> t-� a }y a (916)921-9600 <br /> FAX(916)921-0100 <br /> � Analytical <br /> www.sequolalabs.com <br /> Kleinfelder-Stockton Project: Elks Lodge 5405066 <br /> 2825 East Myrtle Street Project Number: 42162 Reported: <br /> ' Stockton CA,95205 Project Manager: Joe Zilles 05/19/04 18:53 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> t Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> 'Batch 4050227-EPA 3050B <br /> Laboratory Control Sample(4050227-BS1) Prepared:05/13/04 Analyzed:05/17/04 <br /> Arsenic 46.2 2.5 mg/kg 50.0 92 80-120 <br /> 'Cadmium 48.1 0.25 50.0 96 80-120 <br /> Chromium 47.8 0.25 50.0 96 80-120 <br /> Nickel 47.5 1.0 50.0 95 80-120 <br /> 'Zinc 48.3 0.25 50.0 97 80-120 <br /> Matrix Spike(4050227-MSI) Source:S405066-01 Prepared:05/13/04 Analyzed:05/17/04 <br /> Arsenic 40.9 10 mg/kg 50.0 ND 82 80-120 <br /> 'Cadmium 38.7 1.0 " 50.0 ND 77 80-120 QM02 <br /> Chromium 78.1 1.0 50.0 40 76 80-120 QM02 <br /> Nickel 77.0 4.0 50.0 40 74 80-120 QM02 <br /> Zinc 88.7 1.0 50.0 50 77 80-120 QM02 <br /> '_Matrix Spike Dup(4050227-MSD1) Source:S405066-01 Prepared:05/13/04 Analyzed:05/17/04 <br /> Arsenic 37.3 10 mg/kg 50.0 ND 75 80-120 9 20 QM02 <br /> Cadmium 41.6 1.0 50.0 ND 83 80-120 7 20 <br /> 'Chromium 83.3 1.0 11 50.0 40 87 80-120 6 20 <br /> Nickel 81.0 4.0 50.0 40 82 80-120 5 20 <br /> Zinc 93.8 1.0 50.0 50 88 80-120 6 20 <br /> 1 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> ' custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> ' Page 24 of 25 <br />