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885 Jarvis Dr <br /> Sequoia Morgan Hill,CA 95037 <br /> Anal` t cal (408)776-9600 <br /> J`'� FAX(408)782-63088 <br /> www seauoialabs con <br /> URS Corporation f 11 Project BP Hentage Site#11191,Stockton,CA MMC0165 <br /> 2870 Gateway Oaks Dr,Ste 300 Protect Number BP Hentage Site#11191,Stockton,CA Reported <br /> Sacramento CA,95833 Project Manager Vent Elarth 03/14/03 16 58 <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 3030101 -EPA 3050B <br /> Blank 3030101-BLK1 Prepared 03/06/03 Analyzed 03/07/03 <br /> Lead ND 2 5 mg/kg <br /> Laboratory Control Sample 3030101-BS1 Prepared 03/06/03 Analyzed 03/07/03 <br /> Lead 494 2 5 mg/kg 50 0 99 80-120 <br /> Matrix Spike(3030101-MSI) Source S303082-01 Prepared 03/06/03 Analyzed 03/07/03 <br /> Lead 325 10 mg/kg Soo 440 NR 80-120 QM-07 <br /> _Matrix Spike Dup(3030101-M_SD1) Source 5303082-01 Prepared 03/06/03 Analyzed 03/07/03 <br /> Lead 354 10 mg/kg 500 440 NR 80-120 161 20 QM-07 <br /> 9 <br /> •Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 8 of 9 <br />