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819 Sinker Avenue Suite 8 <br /> Sacramento 95834 <br /> Sequoia (916)9)921-96009600 <br /> a— —) <br /> Anal tical FAX(916)921-0100 <br /> y WWW sequoialabs corn <br /> Mii ttler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 03/21/02 16 16 <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 3050E <br /> Blank(2030164-BLKI) Prepared 03/13/02 Analyzed 03/14/02 <br /> Lead ND 2 5 mg/kg <br /> LCS(2030164-BSI) Prepared 03/13/02 Analyzed 03/14/02 <br /> Lead 51 7 2 5 mg/kg 50 0 103 80-120 <br /> Matrix Spike(2030164-MSI) Source 5203147-12 Prepared 03/13/02 Analyzed 03/14/02 <br /> Lead 742 i 0 mg/kg 500 31 864 80-120 <br /> Matrix Spike Du (2030164-MSDI) Source 5203147-12 Prepared 03/13/02 Analyzed 03/14/02 <br /> Lead 734 10 mg/kg 50 0 31 848 80-120 1 08 20 <br /> nota Analytical-Sacramento The i esulis in this iepoi t apply to the samples analyzed in accordance with the chain <br /> of custody docitntent This analytical report must be reproduced in its entirety <br /> Page Page 5 of 6 <br />