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885,lams Drive <br /> Sequoia Morgan Hill CA 950375037 <br /> (408)772-9600 <br /> Analytical FAXequoi labsc08 <br /> www sequoialabs com <br /> 1 <br /> URS Corporation[Arcola Project ARCO#0760,Lodi,CA MNK0808 <br />' 2870 Gateway Oaks Dr,Ste 300 Project Number G09JZ-0461 Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 12/10/04 17 00 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> IBatch 4LO7030-EPA 3050B/EPA 6010B <br /> Blank(4L07030-BLKI) Prepared 12/07/04 Analyzed 12/08/04 <br /> Lead ND 5 0 mg/kg <br /> Laboratory Control Sample(4L07030-BSI) Prepared 12/07/04 Analyzed 12/08/04 <br /> Lead 49 3 5 0 mg/kg 500 99 76-117 <br /> Matrix Spike(4L07030-MS1) Source MNK0699-07 Prepared 12/07/04 Analyzed 12/08/04 <br /> Lead 534 50 mg/kg 500 49 97 76-117 <br /> Matrix Spike Dup(4L07030-MSD]) Source MNK0699-07 Prepared 12/07/04 Analyzed 12/08/04 <br /> Lead 549 50 mg/kg 500 49 100 76-117 3 20 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 7of13 <br />