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919 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,)9 95834 <br /> (916)921-9600 <br /> 100 <br /> Analytical wwseqFAX 6ialabs corn www sequoialabs coni <br /> ]ta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 330 Cameron Park Dr Ste 550 ProjectNumber Arco 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 01/23/02 11 25 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2010246-EPA 3050B <br /> Blank(2010246-BLKI) Prepared&Analyzed 01/21/02 <br /> Lead ND 25 mglkg <br /> LCS(2010246-BSI) Prepared&Analyzed 01/21/02 <br /> Lead 492 25 mg/kg 500 984 80-120 <br /> Matrix Spike(2010246-MSI) Source S201303-01 Prepared&Analyzed 01/2I/02 <br /> Lead 485 10 mg/kg 500 ND 860 80-120 <br /> Matrix Spike Dup(2010246-MSD1) Source 5201303-01 Prepared&Analyzed 01/21/02 <br /> Lead 499 10 mg/kg 500 ND 88 8 80-120 285 20 <br /> cola Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 14 of 17 <br />