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885 Jarvis Dnte <br /> Sequoia Morgan till I,CA 95037 <br /> (408)776-9600 <br /> mW Analytical FAX(408)782-6308 <br /> www sequoialabs,co <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MMJ0614 <br /> 3017 Kilgore Rd Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/04/03 16 52 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result trout Ihuts Level Result %REC Louts RPD Lunit Notes <br /> Batch 3100778-EPA 5030 waters <br /> Blank(3100778-BLKI) Prepared&Analyzed 10/30/03 <br /> Tert-amyl methyl ether ND 10 ug/1 <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 10 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate Dibromofluoromethane 516 500 103 84-122 <br /> Surrogate 1 2-Dichloroethane-d4 582 500 116 74-135 <br /> Surrogate Toluene-d8 512 500 102 84-119 <br /> Laboratory Control Sample(3100778-BSI) Prepared&Analyzed 10/30/03 . <br /> Tert-amyl methyl ether 539 10 ug/l 500 108 70-116 <br /> Tert-butyl alcohol 101 20 100 101 62-142 <br /> Di-isopropyl ether 525 10 500 105 71-121 <br /> 1,2-Dibromoethane(EDB) 595 050 500 119 92-117 Q 29 <br /> 1,2-Dicbloroethane 562 050 500 112 79-126 <br /> Ethanol 704 100 100 70 65-135 <br /> Ethyl tert-butyl ether 579 10 500 116 71-110 Q-29 <br /> Methyl tert-butyl ether 522 050 500 104 77-123 <br /> Surrogate Dibromofluoromethane 553 500 111 84-122 <br /> Surrogate 12-Dichloroethane-d4 566 500 113 74-135 <br /> Surrogate Toluene-0 531 500 106 84-119 <br /> Laboratory Control Sample Du (3100778-BSD1) Prepared&Analyzed 10/30/03 <br /> Tert-amyl methyl ether 524 10 ug/l 500 105 70-116 3 20 <br /> Tert-butyl alcohol 132 20 100 132 62-142 27 20 QR-02 <br /> Di-isopropyl ether 5 84 10 500 117 71-121 11 20 <br /> 1,2-Dibromoethane(EDB) 560 050 500 112 92-117 6 20 <br /> 1,2-Dichloroethane 548 050 500 110 79-126 3 20 <br /> Ethanol 110 100 100 110 65-135 44 20 QR-02 <br /> Ethyl tert-butyl ether 5 69 10 500 114 71-110 2 20 Q-29 <br /> Methyl tent-butyl ether 5 12 0 SO 5 00 102-77-123 2 20 <br /> Surrogate Dibromofluoromethane 547 Soo 109 84-122 <br /> Surrogate 12-Dichloroethane-d4 556 500 111 74-135 <br /> Sequoia Analytical-Morgan Hill The results in 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 baso <br /> This analytical report must be reproduced in its entirety <br /> 7 of 10 <br />