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s <br /> Sequoia 1455McDowP alum�CA94954 <br /> d (707)792-1865 <br /> . Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 434,Lodi,CA P3I0098 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm 50433 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elanh 10/15/03 16 54 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spice Source %"REC RPD <br /> Analyte Result Limit Units Level Result °/oREC Limits RPD Limit Notes <br /> Batch 3100252-EPA 5030 waters <br /> Matrix Spike(3100252-MSI) Source P309524-05 Prepared&Analyzed 10/10/03 <br /> Tert-amyl methyl ether 446 10 ug/I 500 ND 89 70-116 <br /> Benzene 460 050 Soo ND 92 81-118 <br /> Tert butyl alcohol 109 20 100 ND 109 62-142 <br /> Di-isopropyl ether 447 10 Soo ND 89 71-121 <br /> 1,2-Dibromoethane(EDB) 476 050 500 ND 95 92-117 <br /> 1,2-Dtchloroethane 543 050 Soo ND 109 79 126 <br /> Ethanol 867 100 too ND 87 65-135 <br /> Ethylbenzene 4 74 050 500 ND 95 89-122 <br /> Ethyl tert-butyl ether 455 10 500 ND 91 71-110 <br /> Methyl tert butyl ether 423 050 500 ND 85 77-123 <br /> Toluene 4 68 050 500 ND 94 84-119 <br /> Xylenes(total) 14 2 050 150 ND 95 86-132 <br /> rrogate Dibromofluoromelhane 485 500 97 84-122 <br /> Surrogate 12-Dichloroethane-d4 463 500 93 74-135 <br /> Surrogate Toluene-d8 453 500 91 84-119 <br /> Surrogate 4-Bromofluorobenzene 48,3 500 98 86-119 <br /> Matrix Spike Dup(3100252-MSDI) Source P309524-05 Prepared&Analyzed 10/10/03 <br /> Tert-amyl methyl ether 476 1 0 ugll 500 ND 95 70-116 7 20 <br /> Benzene 4 87 0 50 500 ND 97 81-118 6 20 <br /> Tert-butyl alcohol 103 20 100 ND 103 62-142 6 20 <br /> Di-isopropyl ether 481 1 0 500 ND 96 71-121 7 20 <br /> 1 2-Dibromoethane(EDB) 5 12 0 50 500 ND 102 92-117 7 20 <br /> 1 2-Dtchloroethane 501 050 500 ND 100 79-126 8 20 <br /> Ethanol 92 2 100 100 ND 92 65-135 6 20 <br /> Ethylbenzene 4 97 0 50 500 ND 99 89-122 5 20 <br /> Ethyl tert-butyl ether 4 89 10 500 ND 98 71-110 7 20 <br /> Methyl tert-butyl ether 472 050 500 ND 94 77-123 11 20 <br /> Toluene 490 0 50 500 ND 98 84-119 5 20 <br /> Xylenes(total) 14 8 0 50 150 ND 99 86-132 4 20 <br /> Surrogate Dibromofluoromethane 477 500 95 84-122 <br /> Surrogate 12-Dichloroethane-d4 468 500 94 74-135 <br /> Surrogate Toluene-d8 449 300 90 84-119 <br /> Surrogate 4-Bromofluorobenzene 4 50 500 90 86-119 <br /> Sequoia Analytical-Petaluma The results to this report apply to the samples analyzed in accordance with the chain of <br /> . custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 10 <br />