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1455 McDowell Blvd North Ste D <br /> � Sequoia Petaluma CA 94954 <br /> (707)792-1865 <br /> A <br /> FAX(707) 342 <br /> Analytical <br /> www sequoialabsalabs cam <br /> i <br /> URS Corp-Sacramento Project Arco Site 760,Lodi,CA P407056 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36622 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/26/04 11 37 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %nREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4070286-EPA 5030B,waters <br /> Blank(4070286-BLKI) Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 278 300 93 65-135 <br /> Laboratory Control Sample(4070286-BSI) Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C12) 2340 50 ug/l 2750 85 65-135 <br /> Surrogate 4-Bromofluorobenzene 298 300 99 65-135 <br /> Matrix Spike(4070286-MSI) Source P407081-01 Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C12) 2250 50 ug/l 2750 ND 82 65-135 <br /> Surrogate 4-Bromofluorobenzene 197 300 99 65-135 <br /> Matrix Spike Dup(4070286-MSDI) Source P407081-01 Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C12) 2240 50 ug/l 2750 ND 81 65-135 04 20 <br /> agate 4-Bromofluorobenzene 301 300 100 65-135 <br /> Sequoia Analytical -Petaluma The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entrrety <br /> Page 6 of 12 <br />