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.t 1455 McDowell Blvd,North Ste D <br /> ID`" Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical FAX equoi 792 0342 <br /> www sequoialabs cam <br /> URS Corp-Sacramento Project Arco Site 2168,Stockton,CA P402290 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36590 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/26/04 15 43 <br /> Purgeable Hydrocarbons by EPA 8015B-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 4020404-EPA 5030B,waters <br /> Blank 4020404-BLKI Prepared&Analyzed 02/19/04 <br /> Gasoline Range Organics ND 50 ug/1 <br /> Surrogate 4-Bromofluorobenzene 292 300 97 65-135 <br /> Laboratory Control Sample(4020404-BS1) Pre ared&Analyzed 02/19/04 <br /> Gasoline Range Organics 2300 50 u811 2750 84 65-135 <br /> Surrogate 4-Bromofluorobenzene 316 11 300 105 65-135 <br /> Matrix Spike 4020404-MS1 Source P402290-04 Prepared&Analyzed 02/19/04 <br /> Gasoline Range Organics 2430 50 ugll 2750 17 88 65-135 <br /> Surrogate 4-Bromofluorobenzene 319 " 300 106 65-135 <br /> Matrix Spike Du 4020404-MSDI Source P402290-04 Prepared&Analyzed 02/19/04 <br /> Gasoline Range Organics 2410 50 ug/l 2750 17 87 65-135 0 8 20 <br /> rrogate 4-BromoJluor-benzene 313 300 <br /> f04 �651 <br /> Batch 4020438-EPA 5030B waters <br /> Blank 4020438-BLK1 Prepared&Analyzed 02/20/04 <br /> Gasoline Range Organics ND 50 ugA <br /> Surrogate 4-Bromofluorobenzene 305 300 102 65-135 <br /> Laboratory Control Sample 4020438-BSI Prepared&Analyzed 02/20/04 <br /> Gasoline Range Organics 2230 50 ugA 2750 81 65-135 <br /> Surrogate 4-Bromof7uorobenzene 329 300 110 65-135 <br /> Matrix Spike(4020438-MSI) Source P402293-02 Prepared&Analyzed 02/20/04 <br /> Gasoline Range Organics 2240 50 ugtl 2750 170 75 65-135 <br /> Surrogate 4-Bromofluorobenzene 314 300 105 65-135 <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 1 l of 15 <br />