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Sequoia 1455 McDowell Blvd North Ste D <br /> petalwna,CA 94954 <br /> (707)792 1865 <br /> . ��► Analytical FAX(707)7920342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 434,Lodi,CA P310098 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim 50433 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/15/03 16 54 <br /> Total Petroleum Hydrocarbons as Gasoline by EPA 8O15B -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 3100169-EPA 5030,waters <br /> Blank(3100169-BLKI) Prepared&Analyzed 10/08/03 <br /> Gasoline Range Organics ND 50 ugll <br /> Surrogate 4-Bromofluorobenzene 273 300 91 65-135 <br /> Laboratory Control Sample(3100169-BSI) Prepared&Analyzed 10/08/03 <br /> Gasoline Range Organics 2120 50 ugll 2750 77 65-135 <br /> Surrogate 4-Bromofluorobenzene 291 300 97 65135 <br /> Matrix Spike(3100169-MS1) Source P310098-01 Prepared&Analyzed 10/08/03 <br /> Gasoline Range Organics 2070 50 ug/l 2750 ND 75 65-135 <br /> Surrogate 4 Bromofluorobenzene 184 300 95 65-135 <br /> Matrix Spike Dup(3100169-MSD1) Source P_3.10098-01 Prepared&Analyzed 10/08/03 <br /> Gasoline Range Organics 2110 50 ug11 2750 ND 77 65 135 2 20 <br /> rro,ate 4-Bromaf7vorobenzene 288 300 96 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 /> This analytical report must be reproduced in its entirety <br /> Page 7 of 10 <br />