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885 Jarvis Dine <br /> � Sequoia Morgan Hill,CA 95037 <br /> r Analytical equo labs,c00 <br /> FAX(408)7826308 <br /> www sequbialabscom <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MMJ0401 <br /> 3017 Kilgore Rd Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 11/06103 08 05 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Lumts RPD Limt Notes <br /> Batch 3J22002-EPA 5030B PIT <br /> Laboratory Control Sample(3J22002-BS2) Prepared&Analyzed 10/22/03 <br /> Methyl tert-butyl ether 8 37 050 ugll 101 829 63-137 <br /> Benzene 595 050 6 48 91 8 78-124 <br /> Toluene 326 050 29 7 110 78-129 <br /> Ethylbenzene 784 050 720 109 84-117 <br /> Xylenes(total) 35 4 050 33 7 105 83-125 <br /> Gasoline Range Organics 402 50 440 914 70-113 <br /> Surrogate 12-Dichloroethane-d4 4 75 500 950 78-129 <br /> Laboratory Control Sample Dup(3J22002-BSD1) Prepared 10/22/03 Analyzed 10/23/03 <br /> Ethanol 206 100 ugll 200 103 31-186 3 96 37 <br /> ten-Butyl alcohol 393 20 500 786 0206 166 22 <br /> Methyl tent-butyl ether 821 050 100 821 63-137 178 13 QR-02 <br /> Di-isopropyl ether 987 050 100 987 76-130 178 9 QR- <br /> Ethyl tert-butyl ether 109 050 100 109 61-141 12 l 9 QR-0 <br /> cert-Amyl methyl ether 102 050 100 102 56-140 145 12 QR-02 <br /> 1,2 Dichloroethane 991 0 50 100 991 77-136 6 24 13 <br /> 1,2-Dibromoethane(EDB) 993 050 100 993 77-132 3 66 9 <br /> Benzene 994 050 100 99 4 78-124 736 12 <br /> Toluene 896 0 50 100 896 78-129 104 10 QR-02 <br /> Ethylbenzene 958 050 100 95 8 84-117 129 10 QR-02 <br /> Xylenes(total) 284 050 300 947 83-125 5 81 11 <br /> Surrogate 12-Dichloroethane-d4 486 500 971 78-129 <br /> Laboratory Control Sample Dap(3J22002-BSD2) Prepared 10/22/03 Analyzed 10/23/03 <br /> Methyl tert-butyl ether 849 050 ug/l _ 101 84 1 - 63-137 142 13 <br /> Benzene 6 56 050 648 101 78-124 975 12 <br /> Toluene 35 1 050 297 118 78-129 739 10 <br /> Ethylbenzene 769 050 720 107 84-117 193 10 <br /> Xylenes(total) 372 050 337 110 83-125 496 11 <br /> Gasolme Range Organics 389 50 440 88 4 70-113 329 9 <br /> Surrogate 12-Dichloroethane-d4 519 5 00 104 78-129 <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 basis <br /> This analytical report mast be reproduced in its entirety 0 <br /> 14 of 21 <br />