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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792-18651865 <br /> FAX42 <br /> www sequoialabscamX-0 Analytical <br /> X <br /> URS Corp-Sacramento Project BP Heritage 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-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spoke Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3110188-EPA 5030 waters <br /> Matrix Spike(3110188-MSl) Source P311111-06RE1 Prepared&Analyzed 11/11/03 <br /> Tert-amyl methyl ether 458 100 u811 500 ND 92 70-116 <br /> Benzene 474 50 500 ND 95 81-118 <br /> Tert-butyl alcohol 9070 2000 10000 ND 91 62-142 <br /> Di-isopropyl ether 424 100 500 ND 85 71-121 <br /> Ethanol 12100 10000 10000 ND 121 65-135 <br /> Ethylbenzene 497 50 500 ND 99 89-122 <br /> Ethyl tent-butyl ether 427 100 500 ND 85 71-110 <br /> Methyl tert-butyl ether 1630 50 500 1200 86 77-123 <br /> Toluene 483 50 500 ND 97 84-119 <br /> Xylenes(total) 1520 50 1500 ND 101 86-132 <br /> �rrogate Dibromofluoromethane 4 62 I, 450 103 84-122 <br /> rrogale 12-Dichtoroethane-d4 4 17 4 50 93 74-135 <br /> Surrogate Toluene-d8 506 450 112 84-119 <br /> Matrix Spike Du (3110188-MSDI) Source P311111-06RE1 Prepared&Analyzed 11/11/03 <br /> Tert-amyl methyl ether 463 100 ug/l 500 ND 93 70-116 1 20 <br /> Benzene 459 50 500 ND 92 81-118 3 20 <br /> Tert-butyl alcohol 9780 2000 10000 ND 98 62-142 8 20 <br /> Di-isopropyl ether 415 100 500 ND 83 71-121 2 20 <br /> Ethanol 12000 10000 10000 ND 120 65-135 0 8 20 <br /> Ethylbenzene 484 50 500 ND 97 89-122 3 20 <br /> Ethyl tert-butyl ether 424 100 500 ND 85 71-110 0 7 20 <br /> Metbyl tent-butyl ether 1670 50 500 1200 94 77-123 2 20 <br /> Toluene 470 50 500 ND 94 84-119 3 20 <br /> Xylenes(total) 1480 50 1500 ND 99 86-132 3 20 <br /> Surrogate Dtbromofluoromethane 4 65 450 103 84-122 <br /> Surrogate 1 2-Diehloroethane-d4 416 450 92 74-135 <br /> Surrogate Toluene-d8 497 450 110 84-119 <br /> equoia 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 /> basrs This analytical report must be reproduced in its entirety <br /> Page 17 of 22 <br />