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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX 921 100 <br /> Analytical www sequoiala6s com <br /> • <br /> SECOR International-Rancho Cordova Project Chevron 9-2396,Acampo,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43485 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Roger Hoffmore 05/16/01 15 46 <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 1050039- EPA 3050E <br /> Blank(1050039-BLK1) Prepared 05/02/01 Analyzed 05/07/01 <br /> Lead ND 2 50 mg/kg <br /> LCS(1050039-BSI) Prepared 05/02/01 Analyzed 05/07/01 _ <br /> Lead 495 250 mg/kg 500 990 80-120 <br /> Matrix Spike(1050039-MSI) Source S105016-02 Prepared 05/02/01 Analyzed 05/07/01 <br /> Lead 488 100 mg/kg 500 ND 929 80-120 <br /> Matrix Spike Dup(1050039-MSD1) Source 5105016-02 Prepared 05/02/01 Analyzed 05/07/01 <br /> Lead 495 100 mg/kg 500 ND 943 80-120 1 42 20 <br /> 0 <br /> oia 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 7 of 10 <br />