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Sequoia 885 Jarvis 5037 <br /> Morgan HJI CA 950]7 <br /> a— )r Analytical (4"'81)776 <br /> 6300 <br /> 0 www <br /> (g08)782 6308 <br /> www sequoielabs com <br /> URS Corporation rArcoI I Project ARCO#5469, Stockton,CA MPFO114 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0010 Reported <br /> Sacramento CA,95833 Project Manager day Johnson 06/30/06 11 12 <br /> Total Metals by EPA 200 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 /> Batch 6FO6030-EPA 3005A/EPA 200.7 <br /> Blank(6 F06030-BLK 1) Prepared 06/06/06 Analyzed 06/12/06 <br /> Iron ND 100 ug/l <br /> Laboratory Control Sample(6FO6030-BSI) Prepared 06/06/06 Analyzed 06/12/06 <br /> Iron 1010 100 ug/l 1000 191 85-115 <br /> Matnx Spike(6FO6030-MS1) Source MPF0114-10 Prepared 06/06/06 Analyzed 06/12/06 <br /> Iron 1070 too ugll 1000 82 99 70-130 <br /> Matrix Spike Dup(6FO6030-MSD1) Source MPF0114-10 Prepared 06/06/06 Analyzed 06/12/06 <br /> Iron 1060 100 ug11 1000 82 98 70 130 09 20 <br /> • <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 /> Ars analytical report must be reproduced in its entirety <br /> Page 13 0f20 <br />