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1455 McDowell Bivd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792 1665 <br /> Analytical FAX equoi labs c 42 <br /> Awww sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site ]]194,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 RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3110173-EPA 5030 waters <br /> Blank 3110173-BLKI Pre ared&Analyzed 11/10/03 <br /> Tert-amyl methyl ether ND 1 0 u8n <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND l 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> urrogale Dibromofluorom ethane 4 85 " 450 108 84-122 <br /> rrogate 12-Drchloroethane-d4 442 450 98 74-135 <br /> arrogate Toluene-d8 5 01 450 111 84-119 <br /> Laboratory Control Sample(3120173-BSI) Pre ared&Analyzed 11/10/03 <br /> Teri-amyl methyl ether 4 48 1 0 ug/I 5 00 90 70-116 <br /> Benzene 446 0 50 5 00 89 81-118 <br /> Tert-butyl alcohol 88 4 20 100 88 62-142 <br /> Di-isopropyl ether 4 14 1 0 500 83 71-121 <br /> Ethanol 91 3 100 100 91 65-135 <br /> Ethylbenzene 4 64 050 5 00 93 89-122 <br /> Ethyl tert-butyl ether 423 1 0 5 00 85 71-110 <br /> Methyl tert-butyl ether 4 24 050 5 00 85 77-123 <br /> Toluene 4 57 0 50 500 91 84-119 <br /> Xylenes(total) 141 0 50 15 0 94 86-132 <br /> Surrogate Dibromofluoromerhatie 4 80 450 107 84-122 <br /> Surrogate 12-Dichloroethane-d4 4 30 450 96 74-135 <br /> Surrogate Toluene-d8 5 08 450 113 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 14 of 22 <br />