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Sequoia 885 Jarvis Dnve <br /> ry Morgan Ht11 CA 4503737 <br /> `1 (408)776-9600 <br /> Analytical FAX(4782-6308 <br /> www sequoiuoialabscom <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 11/06/03 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 Lieut Units level Result %REC Limits RPD Lumt Notes <br /> Batch 3J23005-EPA 5030B Modified <br /> Laboratory Control Sample(3J23005-BSI) Prepared&Analyzed 10/23/03 <br /> Ethanol 164 100 ug/l 200 820 31 186 <br /> tert-Butyl alcohol 49 1 20 500 98 2 0206 <br /> Methyl tert-butyl ether 765 050 loo 705 63-137 <br /> Di-isopropyl ether 823 050 t o o 823 76-130 <br /> Ethyl tert-butyl ether 829 050 100 829 61-141 <br /> ted-Amyl methyl ether 8 11 050 100 81 1 56-140 <br /> 1,2-Dichloroethane 941 050 100 941 77-136 <br /> 1,2-Drbmmoethane(EDB) 876 050 100 876 77-132 <br /> Benzene 895 050 100 895 78-124 <br /> Toluene 962 050 100 962 78-129 <br /> Ethylbenzene 10 3 050 10 0 103 84-117 <br /> Xylenes(total) 30 3 050 300 101 83-125 <br /> Surrogate 12-Dichloroethane d4 .504 5 00 101 78-129 <br /> Laboratory Control Sample(3J23005-BS2) Prepared&Analyzed 10/23/03 - <br /> Methyl tert-butyl ether 8 19 0 50 ugll 101 81 1 63-137 <br /> Benzene 548 050 648 84 6 78-124 <br /> Toluene 33 4 050 297 112 78-129 <br /> Ethylbenzene 833 050 720 116 84-117 <br /> Xylenes(total) 41 6 0 50 337 123 83-125 <br /> Gasoline Range Organics 494 50 440 112 70-113 0-09 <br /> Surrogate 1,2-Drchloroethane-d4 612 5 00 122 78-129 <br /> Laboratory Control Sample Dup(3J23005-ESDI) Prepared 10/23/03 Analyzed 10/24/03 <br /> Ethanol 208 100 ug/l 200 104 31-186 237 37 <br /> tert-Butyl alcohol 483 20 500 966 0-206 1 64 22 <br /> Methyl tert-butyl ether 886 050 100 88 6 63-137 147 13 QR 02 <br /> Dt-isopropyl ether 941 050 100 94 l 76-130 134 9 QR 02 <br /> Ethyl tert-butyl ether 945 050 100 945 61-141 131 9 QR 02 <br /> tett-Amyl methyl ether 955 050 too 95 5 56-140 163 12 QR-02 <br /> 1,2-Dichloroethane 10 3 050 100 103 77-136 9 03 13 <br /> 1,2-Dibrotnoethane(EDB) 981 0 50 100 98 1 77-132 11 3 9 QR-02 <br /> Benzene 976 0 50 100 976 78-124 866 12 <br /> Toluene 10 3 050 too 103 78-129 6 83 10 <br /> Ethylbenzene 10 7 050 100 107 84-117 3 81 10 <br /> Xylenes(total) 32 2 050 300 107 83-125 609 11 <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 must be reproduced in its entirety <br /> 19 of 21 <br />