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Sequoia V- ry(916)921-9600 <br /> CO <br /> FAX(916)921-0100 <br /> COAnalytical www sequotalabs com <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA <br /> Project Number 1`1/A Reported <br /> 31 Gold Camp Dr,Ste 170 03/21/02 16 16 <br /> Wo Cordova CA,95670 Project Manager David Herzog <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 2030164-EPA 3050B <br /> Blank(2030164-BLKI) Prepared 03/13/02 Analyzed 03/14/02 <br /> Lead ND 25 mglkg <br /> LCS(2030164-BSI) Prenared 03/13/02 A-1-zed 03/14/02 <br /> Lead 51 7 2 5 mg/kg Soo 103 80-120 <br /> Matrix Spike(2030164-MSI) Source S203147-12 Prepared 03/13/02 Analyzed 03/14/02 <br /> Lead 74 2 10 mg/kg 500 31 864 80-120 <br /> Matrix Spike Du (2030164-MSD1) Source 5203147-12 Prepared 03/13/02 Analyzed 03/14/02 <br /> Lead 73 4 10 mg/kg So 0 31 84 8 80-120 1 08 20 <br /> nota Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the cham <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 5 of 6 <br />