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`� 819 Stoker Avenue,Suite 8 <br /> Sequoia Sacramento,916 CA 95834 <br /> -9600 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> IwoAnalytical w .sequotalabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: Arco 5569 Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: N/A aeporwd: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 11/02/01 14:59 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical-Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Nora, <br /> Batch 1J29022-EPA 3050B <br /> Blank(IJ29022-BLK2) _ Prepared: 10/29/01 Analyzed: 11/01/01 _ <br /> Lead ND 1.0 mg/kg <br /> LCS(IJ29022-BS2) Prepared: 10/29/01 Analyzed: 11/01/01 <br /> Lead 43.3 1.0 mgtkg 50.0 86.6 80.120 <br /> LCS Dup(1J29022-BSD2) Prepared: 10/29/01 Analyzed: I I/Ol/01 <br /> Lead - 43.7 1.0 mg/kg 50.0 87.4 80-120 0.920 20 <br /> Matrix Spike(1J29022-MSI) Source:W110485-13 Prepared: 10/29/01 Analyzed: 11/01/01 <br /> Lead 41.6 1.0 mg/kg 50.0 ND 82.0 80-120 <br /> Matrix Spike Dup(IJ29022_MSDI)_ Source:W110485-13 _ Prepared_10/29/01 Analyzed: 11/01/01 _ <br /> Lead _ - _—�--40.8 ----- LO mg/kg 50.0 ND 80.4 80-120 1.94 --20 -� <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This awlytical report must be reproduced in its entirety. <br /> Page 13 of 14 <br />