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1455 McDowell$lvd North Ste D <br /> •� a— ) Sequoia Petaluma,CA 94954 <br /> (707)792 1865 <br /> Analytical FAX(707)7920342 <br /> WWW sequoialabs com <br /> • <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P307259 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elartb 07/28/03 18 02 <br /> Total Petroleum Hydrocarbons as Gasoline by EPA 8015B _ Quality Control <br /> I <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> AnalytlResult Limit Units Level Result %REC Limits RPD Lunit Notes <br /> Batch 3070370-EPA 5030,waters <br /> Blank(3070370-BLK1) Prepared&Analyzed 07/18/03 <br /> Gasoline Range Organics ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 195 300 98 65-135 <br /> Laboratory Control Sample(3070370-BSI) Prepared&Analyzed 07/18/03 <br /> Gasoline Range Organics 2350 50 ugll 2750 85 65-135 <br /> Surrogate 4-Bromofluorobenzene 313 300 104 65-135 <br /> Matrix Spike(3070370-MSI) Source P307258-03 Prepared&Analyzed 07/18/03 <br /> Gasoline Range Organics 2370 50 ug/1 2750 20 85 65-135 <br /> Surrogate 4-Bromofluorobenzene 311 300 104 65-135 <br /> Matrix Spike Dup(3070370-MSD1) Source P307258-03 Prepared&Analyzed 07/18/03 <br /> Gasoline Range Organics 2340 50 ugll 2750 20 84 65-135 1 20 <br /> i <br /> urrngate 4-Bromafluorohenzene 311 " 300 104 65-135 <br /> I <br /> Batch 3070403-EPA 5030,waters <br /> Blank(3070403-BLKI) Prepared&Analyzed 07/21/03 <br /> i <br /> Gasoline Range Organics ND 50 ug/l <br /> i <br /> Surrogate 4-Bromofluorobenzene 191 300 97 65-135 <br /> Laboratory Control Sample(3070403-BSI) Prepared&Analyzed 07/21/03 <br /> Gasoline Range Organics 2370 50 ug/I 2750 86 65-135 <br /> Surrogate 4-Bromofluorobenzene 310 300 103 65-135 <br /> Matrix Spike(3070403-MSI) Source P307259-07 Prepared&Analyzed 07/21/03 <br /> Gasoline Range Organics 2300 50 ugll 2750 ND 84 65-135 <br /> Surrogate 4-Bromofluorobenzene 293 300 98 65-135 <br /> Sequoia Analytical -Petalutna The results in this report apply to the samples analyzed to 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 11 <br />