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Sequoia 8Hi Jarvis CA95037 <br /> Morgan Hill CA 95037 <br /> 4D (408)776 9600 <br /> iqQrAnalytical FAX equoi 782 6308 <br /> FAX <br /> squo�alabs coin <br /> • <br /> Sec,or-Rancho Cordova(ARCO) Project ARCO#2133,Rancho Cordova,CA MNG0012 <br /> 3017 Kilgore Rd Suite 100 Project Number NIP Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/16/04 14 37 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lung Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4GO9007- EPA 5030B PIT <br /> Laboratory Control Sample(4G09007-BS2) Prepared&Analyzed 07/09/04 <br /> Benzene 529 0 50 ug/1 640 83 78-124 <br /> Ethylbenzene 6 88 050 6 96 99 84-117 <br /> Methyl tert-butyl ether 829 0 50 992 84 63 137 <br /> Toluene 329 050 297 111 78 129 <br /> Xylenes(total) 38 8 050 33 7 115 83-125 <br /> Gasoline Range Organics(C4-C12) 430 50 440 98 70-124 <br /> Surrogate I 1-Dichloroethane-d4 5 26 5 00 105 78-129 <br /> Laboratory Control Sample Dup(4609007-BSD1) Prepared 07/09/04 Analyzed 07/10/04 <br /> tent-Amyl methyl ether 10 2 0 50 ug/l 100 102 56-140 17 12 QC21 <br /> Benzene 10 6 0 50 100 106 78-124 4 12 <br /> tent Butyl alcohol 477 20 500 95 0-206 7 22 <br /> sopropyl ether 924 050 100 92 76-130 8 9 <br /> Wi-iDLbronioethane <br /> (EDB) 10 5 0 50 10 0 105 77-132 9 9 <br /> 1,2 Dichloroethane 12 0 050 10 0 120 77-136 36 13 QC21 <br /> Ethanol 225 100 200 112 31-186 3 37 <br /> Ethyl tert-butyl ether 104 0 50 10 0 104 61-141 15 9 QC21 <br /> Ethylbenzene 956 0 50 100 96 84-117 3 10 <br /> Methyl tert butyl ether 105 0 50 10 0 105 63-137 27 13 QC21 <br /> Toluene 103 050 100 103 78 129 6 10 <br /> Xylenes(total) 307 050 300 102 83 125 2 11 <br /> Surrogate 12-Dichloroethane-d4 653 5 00 131 78-129 S01 <br /> Matrix Spike(4609007-MSI) Source MNG0058-01 Prepared&Analyzed 07/09/04 <br /> Gasoline Range Organics(C4-C]2) 61900 5000 ug/1 44000 18000 100 70-124 <br /> Surrogate 12-Dichloroethane-d4 602 5 00 120 78-129 <br /> Matrix Spike Dup(4609007-MSD1) Source MNG0058-01 Prepared&Analyzed 07/09/04 <br /> Gasoline Range Organics(C4-C12) 61200 5000 ug/1 44000 18000 98 70-124 1 20 <br /> Surrogate 1 2-Dichloroethane-d4 583 " 5 00 117 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 must be reproduced in its entirety <br /> Page 5 of 6 <br />