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1455 McDowPettaly�C;949 4 <br /> Sequoia (707)792-1865 <br /> Analytical 342 <br /> www sequoialabs PAX(707alabs coin om <br /> URS Corp-Sacramento Project Arco Site 6020,Manteca,CA P402408 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 03/02/04 10 16 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Malyte Result Limit Units Level Result %REC Lrmrts RPD Limit Notes <br /> Batch 4020504-EPA 5030B,waters <br /> Matrix Spike Dup(4020504-MSD1) Source P402304-01 Prepared&Analyzed 02/24/04 <br /> Gasolme Range Organics 2100 50 ug/l 2750 14 76 65-135 05 20 <br /> Surrogate 4-Bromofluorobenzene 309 300 103 65-135 <br /> Batch 4020538-EPA 5030B waters <br /> Blank(4020538-BLKI) Prepared&Analyzed 02/25/04 <br /> Gasoline Range Organics NO 50 US/] <br /> Surrogate 4-Bromofluorobenzene 296 300 99 65-135 <br /> Laboratory Control Sample(4020538-BSI) Prepared&Analyzed 02/25/04 <br /> Gasoline Range Organics 2760 50 ug/l 2750 100 65-135 <br /> Surrogate 4-Bromofluorobenzene 319 300 106 65-135 <br /> AdWatrix Spike(4020538-MSI) Source P402335-02 Prepared&Analyzed 02/25/04 <br /> asolme Range Organics 2730 50 ug/1 2750 53 97 65-135 <br /> Surrogate 4-Bromofluorobenzene 324 300 108 65-135 <br /> Matrix Spike Dup(4020538-MSD1) Source P402335-02 Prepared&Analyzed 02/25/04 <br /> Gasoline Range Organics 2670 50 ug/1 2750 53 95 65-135 2 20 <br /> Surrogate 4-Bromofluorobenzene 315 300 108 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 /> 0 This analytical report must be reproduced in its entirety <br /> Page 15 of 18 <br />