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l Blvd,North Ste D <br /> Sequoia 1455 McDowPetaluma,CA%954 <br /> r,Y (707)792-1865 <br /> r Analytical FAX(707)792-0342 <br />' www sequoialabs com <br />' URS Carp-Sacramento Project Arco Site 760,Lodi,CA P403600 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number G09JZ-0039 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/08/0414 36 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> JAnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4040097-EPA 5030B waters <br /> Blank(4040097-BLKI) Prepared&Analyzed 04/05/04 <br /> Tert-amyl methyl ether ND 10 ug/I <br /> Benzene ND 050 <br /> Ted-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 10 <br /> 1,2-Dibromoethane(FDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> rrogate Dibromofluoromethane 489 500 98 84-122 <br /> rrogate 12-Drchloroethane-d4 495 500 99 74-135 <br /> Surrogate Toluene-d8 488 500 98 84-119 <br /> Surrogate 4-Bromofluorobenzene 516 500 103 86-119 <br /> Laboratory Control Sample(4040097-BSI) Prepared&Analyzed 04/05/04 <br /> Ten amyl methyl ether 521 10 119/1 500 104 78-117 <br /> Benzene 499 050 " 500 100 81-118 <br /> Tert-butyl alcohol 104 20 100 104 60-147 <br /> Di-isopropyl ether 532 10 500 106 70-125 <br /> 1,2-Dibromoethane(EDB) 528 050 5 00 106 85-125 <br /> 1 2-Dichloroethane 533 050 I' 500 107 77-126 <br /> Ethanol 992 100 100 99 55-200 <br /> Ethylbenzene 531 050 500 106 89-122 <br />' Ethyl tert-butyl ether 538 1 0 5 00 108 71-120 <br /> Methyl tert-butyl ether 505 050 500 101 70-122 <br /> Toluene 5 16 050 500 103 84-119 <br /> Xylenes(total) 15 4 050 150 103 86-132 <br /> 1 Surrogate Dibromofluoromethane 506 500 101 84-122 <br /> Surrogate 12-Dichloroethane-d4 493 500 99 74-135 <br /> Surrogate Toluene-d8 482 500 96 84-119 <br /> Surrogate 4-Bromofluorobenzene 489 500 98 86-119 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> i 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 16 of 18 <br />