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1455 McDowell BlvdCA Ste D <br /> a— <br /> Sequoia) (707)Petaluma CA 94954 <br /> Analytical FAX 792 1865 <br /> (707)7920342 <br /> • www sequoialabs com <br /> URS Corp-Sacramento Protect Arco Site 760,Lodi,CA P403547 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0039 Reported <br />' Sacramento CA,95833 Protect Manager Vernon P Earth 03/26/04 16 49 <br /> Total Metals by EPA 6000/7000 Series Methods -Quality Control <br />' Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />' Batch 4030743-EPA 3050B <br /> Blank 4030743-BLK1 Prepared&Analyzed 03/26/04 <br /> Lead ND 75 mg/kg <br /> Laboratory Control Sample 4030743-BS1Prepared&Analyzed 03/26/04 <br /> Lead 494 75 mg/kg 500 99 80-120 <br /> Matrix Spike 4030743-MS1 Source P403565-01 Pre ared&Analyzed 03/26/04 <br /> Lead 42 1 65 mg/kg 43 1 5 9 84 80-120 <br /> Matrix Spike Du 4030743-MSD1 Source P403565-01 Prepared&Anal zed 03/26/04 <br /> Lead 462 74 mglkg 490 59 82 80-120 9 20 <br /> ' Sequoia Analytical-Petaluma 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 /> Page 6 of 7 <br />