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1455 McDowell Blvd,North Ste D <br /> Seuoia Petaluma,CA 94954 <br /> y (707)792-1865 <br /> a)— <br /> Analytical www <br /> seq 7 ialabs om <br /> www sequoialabs Corti <br /> URS Corp-Sacramento Project BP Hentage Site 11194,Tracy,Ca P310692 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/14/03 15 55 <br /> Volatile Organic Compounds by EPA Method 8260B-Quahty Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC APA <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3110189-EPA 5030 waters <br /> Blank(3110189-BLK1) Pre ared&Analyzed 11/11/03 <br /> Tert-amyl methyl ether ND 1 0 ug/1 <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> arrogate Dibromofluoromethane 5 52 „ 500 110 84-122 <br /> rrogate 1 2-Dichloroethane-d4 5 66 5 00 113 74-135 <br /> Surrogate Toluene-d8 4 90 500 98 84 119 <br /> Laboratory Control Sample(3110189-BS1) Prepared&Analyzed 11/11/03 <br /> Teri-amyl methyl ether 5 39 1 0 u9/1 5 00 108 70-116 <br /> Benzene 5 06 050 500 101 81-118 <br /> Teri-butyl alcohol 110 20 100 110 62-142 <br /> Di-isopropyl ether 5 18 1 0 500 104 71-121 <br /> Ethanol 97 1 100 100 97 65-135 <br /> Ethylbenzene 5 18 0 50 500 104 89-122 <br /> Ethyl tert-butyl ether 5 35 1 0 5 00 107 71-110 <br /> Methyl tert-butyl ether 5 28 0 50 500 106 77-123 <br /> Toluene 5 17 0 50 5 00 103 84-119 <br /> Xylenes(total) 15 7 0 50 15 0 105 86-132 <br /> Surrogate DibromoJluoromethane 5 13 5 00 103 84-121 <br /> Surrogate 12-Dichloroethane-d4 5 35 " 500 107 74-135 <br /> Surrogale Toluene-d8 4 86 " 500 97 84-119 <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 18 of 22 <br />