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1 <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> {707}792-1665 <br /> ��► Analytical FAX 792-4342 <br /> www sequoiequaala6s cont <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P404678 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 05/27/04 15 02 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4E10042-EPA 5030E IPrTJ <br /> Blank(4E10042-BLKI) Prepared 05/10/04 Analyzed 05/11/04 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/I <br /> Surrogate 4-Bromofluorobenzene 408 400 102 70-130 <br /> Laboratory Control Sample(4EI0042-BS2) Prepared 05/10/04 Analyzed 05/11/04 <br /> Gasoline Range Organics(C4-C12) 228 50 ugll 250 912 62-134 <br /> Surrogate 4-Bromofluorobenzene 428 400 107 70-130 <br /> Matrix Spike(4EI0042-MSI) Source MND0710-02 Prepared 05/10/04 Analyzed 05/11/04 <br /> Gasoline Range Organics(C4 C12) 461 50 ug/l 550 81 69 1 62-134 <br /> Surrogate 4-Bromofluorobenzene 465 400 116 70-130 <br /> Matrix Spike Dup(4E10042-MSDI) Source MND0710-02 Prepared 05/10/04 Analyzed 05/11/04 <br /> Gasoline Range Organics(C4-C12) 432 50 ug/I 550 81 638 62-134 649 41 <br /> Wg <br /> oate 4-Bromofluorobenzene 450 " 400 112 70-130 <br /> ch 4E11037-EPA 5030B PIT <br /> Blank(4EI1037-BLKI) Prepared&Analyzed 05/11/04 <br /> Gasoline Range Organics(C4 C12) ND 50 ug/I <br /> Surrogate 4-Bromofluorobenzene 392 400 980 70-130 <br /> Laboratory Control Sample(4E11037-BSI) Prepared&AnaIyzed 05/11/04 <br /> Surrogate 4-Bromofluorobenzene 400 ug/I 400 100 70-130 <br /> Laboratory Control Sample(4E I 1037-BS2) Prepared&Analyzed 05/11/04 <br /> Gasoline Range Organics(C4-C12) 219 50 ug/l 250 876 62-134 <br /> Surrogate 4-Bromofluorobenzene 427 400 107 70-130 <br /> Sequoia Analytical-Petaluma The results to this report apply to the samples analysed 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 />