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a— —N <br /> . 1455 McDowell Blvd,.CA Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1965 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> • <br /> URS Corp-Sacramento Project BP Hentage Site 11191,Stockton,Ca P310466 <br /> 2870 Gateway Oaks Drive Suite 300 Protect Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/04/03 16 09 <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 3100668-EPA 5030,waters <br /> Blank(3100668-BLKI) Prepared&Analyzed 10/28/03 <br /> Gasoline Range Organics ND 50 ug/1 <br /> Surrogate 4-Bromofluorobenzene 292 300 97 65-135 <br /> Laboratory Control Sample(3100668-BSI) Prepared&Analyzed 10/28/03 <br /> Gasoline Range Organics 2450 50 ug/l 2750 89 65-135 <br /> Surrogate 4-Bromofluorobenzene 312 300 104 65-135 <br /> Matrix Spike(3100668-MS1) Source P310466-06 Prepared&Analyzed 10/28/03 <br /> Gasoline Range Organics 2420 50 ug/I 2750 19 87 65-135 <br /> Surrogate 4-Bromofluorobenzene 307 300 102 65-135 <br /> _Matrix Spike Dup(3100668-MSDI) Source P310466-06 Prepared_ &Analyzed 10/28/03 <br /> Gasoline Range Organics 2460 50 ug/l 2750 19 89 65-135 2 20 <br /> urrogate 4-Bromofluorobenzene 308 300 103 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 8 of 14 <br />