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4D Sequoia 1455 McDowellPetaluma,CA9494 <br /> (707)792-1865 <br /> 1W Analytical FAX(707)792-0342 <br /> www sequoialabs coin <br /> is <br /> URS Corp-Sacramento Project Arca Site 2093,Tracy,CA P503073 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50265 Reported <br /> Sacramento CA,95833 Project Manager Vemon P Elarth 03/16/05 14 19 <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 %1REC limits RPD Limit Notes <br /> Batch 5030113-EPA 5030B,waters/EPA 8015B-VOA <br /> Blank(5030713-BLKI) Prepared&Analyzed 03/10/05 <br /> Gasoline Range Organics(C4-Cl 2) ND 50 ug/1 <br /> Surrogate 4-Bromofluorobenzene 259 300 86 80-110 <br /> Laboratory Control Sample(5030113-BS1) Prepared&Analyzed 03/10/05 <br /> Gasoline Range Organics(C4-C12) 2680 50 ug/l 2750 91 609-120 <br /> Surrogate 4-Bromofluorobenzene 181 300 94 80-110 <br /> Matrix Spike(5030113-MSI) Source P503061-09 Prepared&Analyzed 03/10/05 <br /> Gasoline Range Organics(C4-C 12) 2620 50 ug/l 2750 ND 95 609-120 <br /> Surrogate 4-Bromofluorobenzene 274 300 91 80-110 <br /> Matrix Spike Du (5030113-MSD1) Source P503061-09 Prepared&Analyzed 03/10/05 <br /> Gasoline Range Organics(C4-C12) 2600 50 ug/l 2750 ND 95 609-120 08 20 <br /> urrogate 4-Bromofluorobenzene 172 300 91 80-110 <br /> Batch 5030132-EPA 5030B,waters/EPA 8015B-VOA <br /> Blank(5030132-BLKI) Prepared&Analyzed 03/11/05 <br /> Gasoline Range Organics(C4-C]2) ND 50 ug/] <br /> Surrogate 4-Bromofluorobenzene 247 300 82 80-110 <br /> Laboratory Control Sample(5030132-BSI) Prepared&Analyzed 03/11/05 <br /> Gasoline Range Organics(124-C 12) 2370 50 ug/l 2750 86 609 120 <br /> Surrogate 4-Bromofluorobenzene 168 300 89 80-110 <br /> Matrix Spike(5030132-MSI) Source P503073-10 Prepared&Analyzed 03/11/05 <br /> Gasoline Range Organics(C4-C12) 2320 50 ug/l 2750 ND 84 609-120 <br /> Surrogate 4-Bromofluorobenzene 268 300 89 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 11 of 19 <br />