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•� Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> Analytical (707)792-1865 <br /> FAX(707)792-0342 <br /> www sequotalabs corn <br /> URS Corp-Sacramento Project BP Heritage Site 11194,'Tracy,Ca P502088 <br /> 2870 Gateway Oaks Drive Suite 300 Project N—ber WR36365 Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 02/16/05 16 54 <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 5020071 -EPA 5030B,waters/EPA 8015B-VOA <br /> Blank(5020071-BLKI) Prepared&Analyzed 02/04/05 <br /> Gasoline Range Organics(C4 C12) ND 50 ug/1 <br /> Surrogate 4-Bromofluorobenzene 269 300 90 80-110 <br /> Laboratory Control Sample(5020071-BSI) Prepared&Analyzed 02/04/05 <br /> Gasoline Range Organics(C4-C32) 2030 50 ugA 2750 74 67-I01 <br /> Surrogate 4-Bromofluorobenzene 301 300 100 80-110 <br /> Matrix Spike(5020071-MS1) Source P501476-03 Prepared&Analyzed 02/04/05 <br /> Gasoline Range Organics(C4-C12) 24200 250 ug/l 13800 14000 74 67-101 <br /> Surrogate 4-Bromofluorobenzene 305 300 102 80-110 <br /> Matrix Spike Dup(5020071-MSD1) Source P501476-03 Prepared&Analyzed 02/04/05 <br /> Gasoline Range Organics(C4-C12) 23700 250 ug/i 13800 14000 70 67-101 2 20 <br /> �urrognte 4-Bromofluorobenzene 309 300 103 80-110 <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 7 of 10 <br />