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Sequoia <br />� Analytical <br />Gettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 <br />Dublin CA, 94568 Project Manager Barbara Sierninski <br />Total Metals by EPA 6000/7000 Series Methods - Quality Control <br />Sequoia Analytical - Walnut Creek <br />404 N Wiget lane <br />Walnut Creek CA 94598 <br />(925) 98&960() <br />FAX (925) 988-9673 <br />Reported <br />05 -Jan -00 10 33 <br />Reporting Spike Source %REC RPD <br />knalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OA03015 Prepared 04 -Jan -00 Using EPA 3050B <br />Blank (OA03015-BLK2) <br />Lead ND 10 mg/kg <br />LCS (OA03015-BS2) <br />Lead 540 10 mg/kg 500 108 80-120 <br />LCS Dup (OA03015-BSD2) <br />Lead 530 <br />10 mg/kg <br />500 <br />106 80-120 1 87 20 <br />Matrix Spike (OA03015-MSI) <br />Source <br />W912514-01 <br />Lead 747 <br />10 mg/kg <br />500 28 <br />934 80-120 <br />Matrix Spike Dup (OA03015-MSD1) <br />Source <br />W912514-01 <br />Lend 650 <br />10 mg/kg <br />500 28 <br />740 80-120 139 20 Q-02 <br />r� <br />u <br />Sequoia Analytical - Walnut Creek The results in rims report apply to the samples analyzedmn accordance with the charn <br />custody document <br />This analyhcal report must be reproduced in its enh>V <br />Alin- B Kemp, La story Director Page 3 of 4 <br />MIR <br />+ <br />