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1455 McDowell Blvd,North Ste D <br /> 4D Sequoia Petaluma,CA 94954 <br /> filer► (707)792-1865 <br /> Analytical <br /> FAx(707)792-0342 <br /> www sequoialabs com <br /> • <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P404694 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 05/25/04 13 28 <br /> Purgeable Hydrocarbons by EPA 8015B- Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source °/6REC RPD <br /> Analyte Result Limit Units Level Result %REC Iamits RPD Limit Notes <br /> Batch 4050178-EPA 5030B,waters <br /> Blank(4050178-BLK1) Prepared&Analyzed 05/07/04 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 287 300 96 65-135 <br /> Laboratory Control Sample(4050178-BS1) Prepared&Analyzed 05/07/04 <br /> Gasoline Range Organics(C4-C12) 2380 50 ugA 2754 87 65-135 <br /> Surrogate 4-Bromofluorobenzene 311 300 104 65-135 <br /> Matrix Spike(4050178-MSI) Source P404601-01 Prepared&Analyzed 05/07/04 <br /> Gasoline Range Organics(C4-C12) 11700 250 ugA 13800 ND 85 65-135 <br /> Surrogate 4-Bromofluorobenzene 311 300 104 65-135 <br /> Matrix Spike Dup(4050178-MSDI) Source P404601-01 Prepared&Analyzed 05/07/04 <br /> Gasoline Range Organics(C4-C12) 11800 250 ugA 13800 ND 86 65-135 09 20 <br /> urrogate 4-Bromofluorobenzene 314 " 300 105 65-135 <br /> Batch 40501184-EPA 5030B,waters <br /> Blank(4050384-BLK1) Prepared&Analyzed 05/08/04 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA <br /> Surrogate 4-Bromofluorobenzene 290 300 97 65-135 <br /> Laboratory Control Sample(4050184-BSI) Prepared&Analyzed 05/08/04 <br /> Gasoline Range Organics(C4-C 12) 2320 50 ug/l 2750 84 65-135 <br /> Surrogate 4-Bromofluorobenzene 306 300 102 65-135 <br /> Matrix Spike(4050184-MSI) Source P404694-01 Prepared&Analyzed 05/08/04 <br /> Gasoline Range Organics(C4-C12) 2200 50 ug/l 2750 ND 80 65-135 <br /> Surrogate 4-Bromofluorobenzene 296 300 99 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 /> 77irs analytical report must be reproduced in its entirety <br /> Page 12 of 21 <br />