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ul Y <br /> 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C95834 <br /> (916)9z2 1-96009600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> SECOR International-Rancho Cordova Project Chevron 9-6171, Stockton,CA <br /> 3017 Kilgore Road, Suite I00 Project Number 077 43512 251 Reported <br /> Rancho Cordova CA,95670 Pr4ject Manager Bill Brasher 07/12/01 18 32 <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 APD Limit Notes <br /> Batch 1F28005- EPA 3050B <br /> Blank(1F28005-BLK2) Prepared 06/27/01 Analyzed 06/28/01 <br /> Lead NO l0 mg/kg <br /> LCS(IF28005-13S2) Prepared 06/27/01 Analyzed 06/28/01 <br /> Lead 55 0 1 0 mg/kg 500 110 80-120 <br /> Matrix Spike(1F28005-MS1) Source W106534-01 Prepared 06/27/01 Analyzed 06/28/01 _ <br /> Lead 600 1 0 mg/kg 500 16 880 80-120 <br /> Matrix Spike Dup(1F28005-MSD1) Source W106534-01 Prepared 06/27/01 Analyzed 06/28/01 <br /> Lead _ 600 10 mg/kg 500 16 890 80-120 000 20 <br /> s <br /> ota 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 I i of 13 <br />