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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> a— ) (707)792-1865 <br /> { Analytical FAX(707)792-0342 <br /> www sequoialabs corn <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P309471 <br /> 2970 Gateway Oaks Drive Suite 300 Project Number Intnm-50293 Reported <br /> Sacramento CA,95933 Project Manager Vernon P Elarth 10/16/03 11 59 <br /> VOLATILE FUEL HYDROCARBONS(EPA 503018015M) - Quality Control <br /> Del Mar Analytical,Irvine <br /> Reporting Sprke Source %REC RPD <br /> Analyte Result Lumt ututs Level Result %REC Lumts RPD Lurut Notes <br /> Batch 3JO7030-EPA 5030B <br /> Matrix Spike Dup(3J07030-MSDI) Source IMJ0179-01 Prepared&Analyzed 10/07/03 _ <br /> GRO(C4 C12) 213 50 ug/1 220 ND 97 70-135 1 20 <br /> Surrogate 4-BFB(FID) 124 100 124 65-135 <br /> Sequoia Analytical- Petaluma 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 20 of 30 <br />