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' 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> FAX� Analytical wwsequ7ialabs 342 <br /> • www sequvialabs cam <br /> URS Corp-Sacramento Project Arm Site 6020,Manteca,CA P406056 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number lntrim-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/14/04 20 24 <br /> Industrial Solvents by EPA Method 8015B modified - Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result °/9REC Limits RPD Limit Notes <br /> Batch 4FO7008-EPA 3810 Headspace <br /> Blank(4F07008-BLK1) Prepared&Analyzed 06/07/04 <br /> Methanol ND 100 119/1 <br /> Surrogate 1 penianol 2390 2500 956 61-119 <br /> Laboratory Control Sample(4F07008-BSI) Prepared&Analyzed 06/07/04 <br /> Methanol 1030 100 ug/l 1000 103 68-130 <br /> Surrogate 1 pentanol 2670 2500 107 62-129 <br /> Matrix Spike(4F07008-MSI) Source P406056-01 Prepared&Analyzed 06/07/04 <br /> Methanol 1020 100 ug/l 1000 ND 102 68-130 <br /> Surrogate 1 pentonof 2690 2500 108 62-129 <br /> Matrix Spike Dup(4F07008-MSDI) Source P406056-01 Prepared&Analyzed 06/07/04 <br /> Methanol 1000 100 ugA 1000 ND 100 68-130 198 19 <br /> Surrogate 1 pentanol 2660 2500 106 62-129 <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 15 of 20 <br />