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L• �•p " + 819 Striker Avenue,Suite 8 <br /> Spp u®1 a Sacramento.CA 95834 <br /> (916)921-9600 <br /> l FAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> L <br /> Kicinfelder-Stockton Project: Northbrook S308269 <br /> a <br /> 2825 East Myrtle Street Project Number: 34202.E01 Reported: <br /> Stockton CA,95205 Project Manager: Joe Zilles 08/20/03 17:53 <br /> LTotal Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> LIAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> LBatch 3080192-EPA 3050B it <br /> Blank(3080192-BLK1) Prepared:08/14/03 Analyzed:08/15/03 <br /> Cadmium ND 0.25 mg/kg <br /> Chromium ND 0.25 " <br /> Lead ND 2.5 " <br /> Nickel ND 1.0 <br /> Zinc ND 0.50 <br /> LLaboratory Control Sample(3080192-BSI) Prepared:08/14/03 Analyzed:08/15/03 <br /> Cadmium 44.0 0.25 mg/kg 50.0 88 80-120 <br /> Chromium 44.8 0.25 50.0 90 80-120 <br /> LLead 44.2 2.5 50.0 88 80-120 <br /> Nickel 45.1 1.0 50.0 90 80-120 <br /> Zinc 45.9 0.50 50.0 92 80-120 <br /> r Matrix Spike(3080192-MS1) Source: S308268-03 Prepared:08/14/03 Analyzed:08/15/03 <br /> LCadmium 40.1 1.0 mg/kg 50.0 ND 80 80-120 <br /> Chromium 67.9 1.0 50.0 26 84 80-120 <br /> LLead 38.0 10 50.0 ND 76 80-120 Q-LDA <br /> Nickel 75.8 4.0 50.0 34 84 80-120 <br /> Zinc 85.8 2.0 50.0 44 84 80-120 <br /> Matrix Spike Dup(3080192-MSD1) Source: 5308268-03 Prepared:08/14/03 Analyzed: 08/15/03 <br /> Cadmium 38.1 l.0 mg/kg 50.0 ND 76 80-120 5 20 Q-LIM <br /> Chromium 65.8 1.0 50.0 26 80 80-120 3 20 <br /> Lead 34.5 10 50.0 ND 69 80-120 10 20 Q-LIM <br /> L <br /> Nickel 73.7 4.0 50.0 34 79 80-120 3 20 Q-LM <br /> Zinc 79.3 2.0 50.0 44 71 80-120 8 20 Q-LW <br /> L <br /> int <br /> L <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> L 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 23 of 29 <br />