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1455 McDowell Blvd,North Ste D <br /> f j <br /> Sequoia Petaluma,GA94865 <br /> r � (7D7)792-1865 <br /> Analytical FAXequoi labsc42 <br /> www sequoialabs coni <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P310692 <br /> 2870 Gateway Oaks Drive Suite 300 Project plumber WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/14/03 15 55 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3110233-EPA 5030 waters <br /> Laboratory Control Sample Du (3110233-BSD1) Prepared&Analyzed 11/12/03 <br /> Tert-amyl methyl ether 462 1 0 ug/l 5 00 92 70-116 11 20 <br /> Benzene 480 050 500 96 81-118 11 20 <br /> Tert-butyl alcohol 939 20 100 94 62-142 14 20 <br /> Di-isopropyl ether 426 1 0 5 00 85 71-121 8 20 <br /> Ethanol 109 100 100 109 65-135 8 20 <br /> Ethylbenzene 5 08 0 50 5 00 102 89-122 10 20 <br /> Ethyl tert-butyl ether 4 34 1 0 5 00 87 71-110 9 20 <br /> Methyl tert-butyl ether 4 32 050 500 86 77-123 l0 20 <br /> Toluene 492 0 50 5 00 98 84-119 9 20 <br /> Xylenes(total) 15 2 050 15 0 101 86-132 11 20 <br /> Orragate <br /> gate Litbromofluoromethane 468 450 104 84-122 <br /> gate 12-Dtchloroethane-d4 4 18 450 93 74-135 <br /> Toluene d8 5 05 430 112 84-119 <br /> e <br /> quota 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 21 of 22 <br />