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Sequoia 1455 McDowell etaluma,CA 949544 <br /> (707792-1865 <br /> (D il <br /> A �Analytical FAX(707))792 0342342 <br /> . www seyuoialabs com <br /> URS Corp-Sacramento project BP Hentage Site 11194,Tracy,Ca P308015 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/16/03 17 10 <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 3080111 -EPA 5030 waters <br /> Matrix Spike(3080111-MS1) Source P307552-15 Prepared_&Amlyzed 08/07/03 <br /> Tert-amyl methyl ether 100 20 uFA 100 ND 100 70-116 <br /> Benzene 167 10 100 59 108 81-118 <br /> Tert-butyl alcohol 1910 400 2000 66 92 62-142 <br /> Di-isopropyl ether 103 20 100 ND 103 71-121 <br /> 1,2-Dibromoethane(EDB) 110 10 100 ND 110 92-117 <br /> 1,2-Dichloroethane 107 10 100 ND 107 79-126 <br /> Ethyl tert-butyl ether 995 20 100 ND 100 71-110 <br /> Methyl tert-butyl ether 609 10 100 500 109 77-123 <br /> Toluene 99 3 10 100 52 94 84-119 <br /> Surrogate Dzbromofluoromethane 4 77 4 50 106 84-122 <br /> Surrogate 12-Dichloroethane-d4 4 73 4.50 105 74-135 <br /> Orrogate Toluene-d8 4 79 450 106 84-119 <br /> arrogate 4-Bromofluorobenzene 4 85 450 108 86-119 <br /> Matrix Spike Du (3080111-MSDI) Source P307552-15 Prepared&Analyzed 08/07/03 <br /> Teri-amyl methyl ether 104 20 ug/1 100 ND 104 70-116 4 20 <br /> Benzene 166 10 100 59 107 81-118 0 6 20 <br /> Tert-butyl alcohol 1740 400 2000 66 84 62-142 9 20 <br /> Di-isopropyl ether 102 20 100 ND 102 71-121 1 20 <br /> 1,2-Dibromoethane(EDB) 111 10 100 ND 111 92-117 0 9 20 <br /> 1,2-Dichloroethane 108 10 100 ND 108 79-126 0 9 20 <br /> Ethyl tert-butyl ether 987 20 100 ND 99 71-110 0 8 20 <br /> Methyl tent-butyl ether 614 10 100 500 114 77-123 0 8 20 <br /> Toluene 101 10 t00 5 2 96 84-119 2 20 <br /> Surrogate Dzbromofluoromethone 4 74 450 105 84-122 <br /> Surrogate 1 1-Dichloroethane-d4 4 75 450 106 74-135 <br /> Surrogate Toluene-d8 4 88 450 108 84-119 <br /> Surrogate 4-Bromofluorobenzene 490 450 109 86-119 <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 17 of 2l <br />