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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX <br /> 111ir— 0 <br /> Analytical www seququollaUs 73 <br /> alabsccoin <br /> Gettler Ryan Inc -Dublin Project Tosco <br /> 6747 bterra Court Suite.i Piuject Number Tvaw# 1 1 192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 29-Aug-01 11 51 <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 Notes <br /> Batch 1 H17016- PPA 3050B <br /> Blank(IH17016-BLKI) Prepared 17-Aug-01 Analyzed 20-Aug-01 <br /> Lead ND 10 mg/kg <br /> LCS(IH17016-BSI) Prepared 17-Aug-Ol Analyzed 20-Aug-01 <br /> Lead 55 0 1 0 mg/kg 50 0 110 80-120 <br /> LCS Dup(1H17016-$SDI) Prepared 17-Aug-01 Analyzed 20-Aug-01 <br /> Lead 508 1 0 mg/kg 500 102 80-120 794 20 <br /> Matrix Spike ()H)7016-MSI) Source W108269-09 Prepared 17-Aug-01 Analyzed 29-Aug-01 <br /> Lead 797 10 mg/kg 500 42 754 80-120 QM-07 <br /> Matrix Spike Dup(1H17016-MSDI) Source W108269-09 Prepared 17-Aug-01 Analyzed 29-Aug-01 <br /> E,ead <br /> 770 1 0 mg/kg 500 42 70 0 80-120 345 20 QM-07 <br /> i <br /> f <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the c <br /> custody document This analytical report must be reproduced in its en <br /> Page 5 of 6 <br />