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ID (707)1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> 792-1865 <br /> iW Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> [.FRS Corp-Sacramento Project Arco Site 6020,Manteca,CA P312071 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm-50681 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 12/22/03 13 18 <br /> Volatile Orgamc Compounds by EPA Method 8260B- Quality 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 3120260-EPA 5030E waters <br /> Blank 3120260-BLK1 Prepared 12/09/03 Analyzed 12/10/03 <br /> Tert-amyl methyl ether ND 1 0 ugll <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> 1,2-Dibromoethane(EDS) ND 050 " <br /> 1,2-DlchlOroethane ND 050 " <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 0 50 " <br /> rrogate Dibromofluoromethane 560 600 93 84-122 <br /> Surrogate 12-Dichloroethane-d4 553 600 92 74-135 <br /> Surrogate Toluene-0 6 05 6 00 101 84-119 <br /> Surrogate 4-Bromofluorobenzene 5 86 600 98 86-119 <br /> Laboratory Control Sample(3120260-BS12 Prepared&Analyzed 12/09/03 <br /> Tert-amyl methyl ether 555 1 0 ug/1 5 00 111 70-116 <br /> Benzene 575 050 5 00 115 81-118 <br /> Tert-butyl alcohol 115 20 100 115 62-142 <br /> Di-isopropyl ether 5 74 1 0 5 00 Hs 71-121 <br /> 1,2-Dibromoethane(EDB) 5 75 0 50 500 115 92-117 <br /> 1,2-Dichloroethane 5 55 050 500 111 79-126 <br /> Ethanol 949 100 100 95 65-135 <br /> Ethylbenzene 5 98 0 50 500 120 89-122 <br /> Ethyl tert-butyl ether 5 39 1 0 500 108 71-110 <br /> Methyl tert-butyl ether 5 69 0 50 500 114 77-123 <br /> Toluene 551 0 50 500 110 84-119 <br /> Xylenes(total) 18 1 0 50 15 0 121 86-132 <br /> Surrogate Dibromofluoromethane 6 05 600 101 84-122 <br /> Surrogate 1 2-Dichloroethane-d4 5 79 600 96 74-135 <br /> Surrogate Toluene-d8 6 21 600 104 84-119 <br /> Surrogate 4-Bromofluorobenzene 5 88 600 98 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 staled results are reported on a wet weight <br /> basts Thus analytical report must be reproduced in its entirety <br /> Page 14 of 17 <br />