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Z <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1845 <br /> IWOAnalytical <br /> FAx(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 760,Lodi,CA P310474 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36622 Reported <br /> Sacramento CA,95833 Project Manager Vernon P EIarth 11/04/03 11 41 <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 3100757-EPA 5030,waters <br /> Blank(3100757-BLK1) Prepared&Analyzed 10/30/03 <br /> Gasoline Range Organics ND 50 ug/1 <br /> Surrogate 4-Bromofluorobenzene 280 300 93 65-135 <br /> Laboratory Sample(3100757-BSI) _ _ Prepared&Analyzed 10/30/03 _ <br /> Gasoline Range Organics 2440 50 ug/I 2750 - 89 65-135 — — — <br /> Surrogate 4-Bromofluorobenzene 300 300 100 65-135 <br /> Matrix Spike 3100757-MSI Source P310436-10 Prepared&Analyzed 10/30/03 <br /> Gasoline Range Organics 2490 50 ug/I 2750 10 90 65-135 <br /> Surrogate 4-Bromofluorobenzene 288 300 96 65-135 <br /> Matrix Spike Dup_(3100757-MSD1) Source P310436-10 Prepared&Analyzed 10/30/03- _ <br /> Gasoline Range Organics 2390 _ 50 ugll 2750 10 87 65-135 4 20 <br /> arrogate 4 Bromofluorobenzene 291 300 97 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 6 of 11 <br />